printf: rustfmt pass

src/printf/cli.rs

@@ -10,7 +10,7 @@ pub static EXIT_ERR: i32 = 1;
 pub fn err_msg(msg: &str) {
     let exe_path = match env::current_exe() {
         Ok(p) => p.to_string_lossy().into_owned(),
-        _ => String::from("")
+        _ => String::from(""),
     };
     writeln!(&mut stderr(), "{}: {}", exe_path, msg).unwrap();
 }

src/printf/memo.rs

@@ -23,10 +23,7 @@ fn warn_excess_args(first_arg : &str) {
 }
 
 impl Memo {
-    pub fn new(
-        pf_string: &String,
-        pf_args_it: &mut Peekable<Iter<String>>
-            ) -> Memo {
+    pub fn new(pf_string: &String, pf_args_it: &mut Peekable<Iter<String>>) -> Memo {
         let mut pm = Memo { tokens: Vec::new() };
         let mut tmp_token: Option<Box<Token>>;
         let mut it = PutBackN::new(pf_string.chars());
@@ -40,14 +37,18 @@ impl Memo {
             tmp_token = Sub::from_it(&mut it, pf_args_it);
             match tmp_token {
                 Some(x) => {
-                    if ! has_sub { has_sub = true; }
+                    if !has_sub {
+                        has_sub = true;
+                    }
                     pm.tokens.push(x);
-                },
+                }
                 None => {}
             }
             if let Some(x) = it.next() {
                 it.put_back(x);
-            } else { break; }
+            } else {
+                break;
+            }
         }
         if !has_sub {
             let mut drain = false;

src/printf/mod.rs

@@ -1,4 +1,3 @@
 mod cli;
 mod memo;
 mod tokenize;
-

src/printf/tokenize/num_format/format_field.rs

@@ -11,23 +11,22 @@ pub enum FieldType {
     Charf,
 }
 
-/*
-#[allow(non_camel_case_types)]
-pub enum FChar {
-    d,
-    e,
-    E,
-    i,
-    f,
-    F,
-    g,
-    G,
-    u,
-    x,
-    X,
-    o
-}
- */
+// #[allow(non_camel_case_types)]
+// pub enum FChar {
+// d,
+// e,
+// E,
+// i,
+// f,
+// F,
+// g,
+// G,
+// u,
+// x,
+// X,
+// o
+// }
+//
 
 // a Sub Tokens' fields are stored
 // as a single object so they can be more simply
@@ -38,6 +37,5 @@ pub struct FormatField<'a> {
     pub second_field: Option<u32>,
     pub field_char: &'a char,
     pub field_type: &'a FieldType,
-    pub orig : & 'a String
+    pub orig: &'a String,
 }
-

src/printf/tokenize/num_format/formatter.rs

@@ -13,7 +13,7 @@ pub struct FormatPrimitive {
     pub prefix: Option<String>,
     pub pre_decimal: Option<String>,
     pub post_decimal: Option<String>,
-    pub suffix: Option<String>
+    pub suffix: Option<String>,
 }
 
 impl Default for FormatPrimitive {
@@ -22,7 +22,7 @@ impl Default for FormatPrimitive {
             prefix: None,
             pre_decimal: None,
             post_decimal: None,
-            suffix: None
+            suffix: None,
         }
     }
 }
@@ -40,34 +40,28 @@ pub enum Base {
 pub struct InPrefix {
     pub radix_in: Base,
     pub sign: i8,
-    pub offset : usize
+    pub offset: usize,
 }
 
 pub trait Formatter {
     //  return a FormatPrimitive for
     // particular field char(s), given the argument
     // string and prefix information (sign, radix)
-    fn get_primitive(
-        &self,
+    fn get_primitive(&self,
                      field: &FormatField,
                      inprefix: &InPrefix,
-        str_in: &str
-            ) -> Option<FormatPrimitive>;
+                     str_in: &str)
+                     -> Option<FormatPrimitive>;
     // return a string from a formatprimitive,
     // given information about the field
-    fn primitive_to_str(
-        &self,
-        prim: &FormatPrimitive,
-        field: FormatField) -> String;    
+    fn primitive_to_str(&self, prim: &FormatPrimitive, field: FormatField) -> String;
 }
-pub fn get_it_at(offset: usize,
-              str_in: &str) -> PutBackN<Chars> {
+pub fn get_it_at(offset: usize, str_in: &str) -> PutBackN<Chars> {
     PutBackN::new(str_in[offset..].chars())
 }
 
 // TODO: put this somewhere better
 pub fn warn_incomplete_conv(pf_arg: &str) {
     // important: keep println here not print
-    cli::err_msg(&format!("{}: value not completely converted",
-             pf_arg))
+    cli::err_msg(&format!("{}: value not completely converted", pf_arg))
 }

src/printf/tokenize/num_format/formatters/base_conv/mod.rs

@@ -1,8 +1,4 @@
-pub fn arrnum_int_mult(
-    arr_num : &Vec<u8>,
-    basenum : u8,
-    base_ten_int_fact : u8 
-    ) -> Vec<u8> {
+pub fn arrnum_int_mult(arr_num: &Vec<u8>, basenum: u8, base_ten_int_fact: u8) -> Vec<u8> {
     let mut carry: u16 = 0;
     let mut rem: u16;
     let mut new_amount: u16;
@@ -19,7 +15,7 @@ pub fn arrnum_int_mult(
                 rem = new_amount % base;
                 carry = (new_amount - rem) / base;
                 ret_rev.push(rem as u8)
-            },
+            }
             None => {
                 while carry != 0 {
                     rem = carry % base;
@@ -30,33 +26,31 @@ pub fn arrnum_int_mult(
             }
         }
     }
-    let ret : Vec<u8> =
-        ret_rev.iter().rev().map(|x| x.clone()).collect();
+    let ret: Vec<u8> = ret_rev.iter().rev().map(|x| x.clone()).collect();
     ret
 }
 
 pub struct Remainder<'a> {
     pub position: usize,
     pub replace: Vec<u8>,
-    pub arr_num: &'a Vec<u8>
+    pub arr_num: &'a Vec<u8>,
 }
 
 pub struct DivOut<'a> {
     pub quotient: u8,
-    pub remainder: Remainder<'a>
+    pub remainder: Remainder<'a>,
 }
 
-pub fn arrnum_int_div_step<'a>(
-    rem_in: Remainder<'a>,
+pub fn arrnum_int_div_step<'a>(rem_in: Remainder<'a>,
                                radix_in: u8,
                                base_ten_int_divisor: u8,
-    after_decimal: bool
-        ) -> DivOut<'a>  {
+                               after_decimal: bool)
+                               -> DivOut<'a> {
 
     let mut rem_out = Remainder {
         position: rem_in.position,
         replace: Vec::new(),
-        arr_num: rem_in.arr_num
+        arr_num: rem_in.arr_num,
     };
 
     let mut bufferval: u16 = 0;
@@ -70,12 +64,10 @@ pub fn arrnum_int_div_step<'a>(
     let mut it_f = refd_vals.iter();
     loop {
         let u = match it_replace.next() {
-            Some(u_rep) => { u_rep.clone() as u16 }
+            Some(u_rep) => u_rep.clone() as u16,
             None => {
                 match it_f.next() {
-                    Some(u_orig) => {
-                        u_orig.clone() as u16
-                    }
+                    Some(u_orig) => u_orig.clone() as u16,
                     None => {
                         if !after_decimal {
                             break;
@@ -96,11 +88,7 @@ pub fn arrnum_int_div_step<'a>(
                 Vec::new()
             } else {
                 let remainder_as_arrnum = unsigned_to_arrnum(bufferval);
-                let remainder_as_base_arrnum = base_conv_vec(
-                    &remainder_as_arrnum,
-                    10,
-                    radix_in
-                );
+                let remainder_as_base_arrnum = base_conv_vec(&remainder_as_arrnum, 10, radix_in);
                 remainder_as_base_arrnum
             };
             rem_out.position += 1 + (traversed - rem_out.replace.len());
@@ -109,78 +97,76 @@ pub fn arrnum_int_div_step<'a>(
             bufferval *= base;
         }
     }
-    DivOut { quotient: quotient, remainder: rem_out }
-}
-/*
-pub struct ArrFloat {
-    pub leading_zeros: u8,
-    pub values: Vec<u8>,
-    pub basenum: u8
-}
-
-pub struct ArrFloatDivOut {
-    pub quotient: u8,
-    pub remainder: ArrFloat
-}
-
-pub fn arrfloat_int_div(
-    arrfloat_in : &ArrFloat,
-    base_ten_int_divisor : u8,
-    precision : u16
-) -> DivOut  {
-
-    let mut remainder = ArrFloat {
-        basenum: arrfloat_in.basenum,
-        leading_zeros: arrfloat_in.leading_zeroes,
-        values: Vec<u8>::new()
-    }
-    let mut quotient = 0;
-    
-    let mut bufferval : u16 = 0;
-    let base : u16 = arrfloat_in.basenum as u16;
-    let divisor : u16 = base_ten_int_divisor as u16;
-
-    let mut it_f = arrfloat_in.values.iter();
-    let mut position = 0 + arrfloat_in.leading_zeroes as u16;
-    let mut at_end = false;
-    while position< precision {
-        let next_digit = match it_f.next() {
-            Some(c) => {}
-            None => { 0 }
-        }
-        match u_cur {
-            Some(u) => {
-                bufferval += u.clone() as u16;
-                if bufferval > divisor {
-                    while bufferval >= divisor {
-                        quotient+=1;
-                        bufferval -= divisor;
-                    }
-                    if bufferval == 0 {
-                        rem_out.position +=1;
-                    } else {
-                        rem_out.replace = Some(bufferval as u8);
-                    }
-                    break;
-                } else {
-                    bufferval *= base;                    
-                }                
-            },
-            None => {
-                break;
+    DivOut {
+        quotient: quotient,
+        remainder: rem_out,
     }
 }
-        u_cur = it_f.next().clone();
-        rem_out.position+=1;
-    }
-    ArrFloatDivOut { quotient: quotient, remainder: remainder }
-}
-*/
-pub fn arrnum_int_add(
-    arrnum : &Vec<u8>,
-    basenum : u8,
-    base_ten_int_term : u8 
-    ) -> Vec<u8> {
+// pub struct ArrFloat {
+// pub leading_zeros: u8,
+// pub values: Vec<u8>,
+// pub basenum: u8
+// }
+//
+// pub struct ArrFloatDivOut {
+// pub quotient: u8,
+// pub remainder: ArrFloat
+// }
+//
+// pub fn arrfloat_int_div(
+// arrfloat_in : &ArrFloat,
+// base_ten_int_divisor : u8,
+// precision : u16
+// ) -> DivOut  {
+//
+// let mut remainder = ArrFloat {
+// basenum: arrfloat_in.basenum,
+// leading_zeros: arrfloat_in.leading_zeroes,
+// values: Vec<u8>::new()
+// }
+// let mut quotient = 0;
+//
+// let mut bufferval : u16 = 0;
+// let base : u16 = arrfloat_in.basenum as u16;
+// let divisor : u16 = base_ten_int_divisor as u16;
+//
+// let mut it_f = arrfloat_in.values.iter();
+// let mut position = 0 + arrfloat_in.leading_zeroes as u16;
+// let mut at_end = false;
+// while position< precision {
+// let next_digit = match it_f.next() {
+// Some(c) => {}
+// None => { 0 }
+// }
+// match u_cur {
+// Some(u) => {
+// bufferval += u.clone() as u16;
+// if bufferval > divisor {
+// while bufferval >= divisor {
+// quotient+=1;
+// bufferval -= divisor;
+// }
+// if bufferval == 0 {
+// rem_out.position +=1;
+// } else {
+// rem_out.replace = Some(bufferval as u8);
+// }
+// break;
+// } else {
+// bufferval *= base;
+// }
+// },
+// None => {
+// break;
+// }
+// }
+// u_cur = it_f.next().clone();
+// rem_out.position+=1;
+// }
+// ArrFloatDivOut { quotient: quotient, remainder: remainder }
+// }
+//
+pub fn arrnum_int_add(arrnum: &Vec<u8>, basenum: u8, base_ten_int_term: u8) -> Vec<u8> {
     let mut carry: u16 = base_ten_int_term as u16;
     let mut rem: u16;
     let mut new_amount: u16;
@@ -196,7 +182,7 @@ pub fn arrnum_int_add(
                 rem = new_amount % base;
                 carry = (new_amount - rem) / base;
                 ret_rev.push(rem as u8)
-            },
+            }
             None => {
                 while carry != 0 {
                     rem = carry % base;
@@ -207,33 +193,21 @@ pub fn arrnum_int_add(
             }
         }
     }
-    let ret : Vec<u8> =
-        ret_rev.iter().rev().map(|x| x.clone()).collect();
+    let ret: Vec<u8> = ret_rev.iter().rev().map(|x| x.clone()).collect();
     ret
 }
 
-pub fn base_conv_vec(
-    src : &Vec<u8>,
-    radix_src : u8,
-    radix_dest : u8
-        ) -> Vec<u8> {
+pub fn base_conv_vec(src: &Vec<u8>, radix_src: u8, radix_dest: u8) -> Vec<u8> {
     let mut result: Vec<u8> = Vec::new();
     result.push(0);
     for i in src {
-        result = arrnum_int_mult(&result,
-                                     radix_dest, radix_src);
-        result = arrnum_int_add(
-            &result,
-            radix_dest,
-            i.clone()
-            );
+        result = arrnum_int_mult(&result, radix_dest, radix_src);
+        result = arrnum_int_add(&result, radix_dest, i.clone());
     }
     result
 }
 
-pub fn unsigned_to_arrnum(
-    src : u16
-) -> Vec<u8> {
+pub fn unsigned_to_arrnum(src: u16) -> Vec<u8> {
     let mut result: Vec<u8> = Vec::new();
     let mut src_tmp: u16 = src.clone();
     while src_tmp > 0 {
@@ -247,11 +221,7 @@ pub fn unsigned_to_arrnum(
 
 // temporary needs-improvement-function
 #[allow(unused_variables)]
-pub fn base_conv_float(
-    src : &Vec<u8>,
-    radix_src : u8,
-    radix_dest : u8
-        ) -> f64 {
+pub fn base_conv_float(src: &Vec<u8>, radix_src: u8, radix_dest: u8) -> f64 {
     // it would require a lot of addl code
     // to implement this for arbitrary string input.
     // until then, the below operates as an outline
@@ -263,7 +233,9 @@ pub fn base_conv_float(
     let mut i = 0;
     let mut r: f64 = 0 as f64;
     for u in src {
-        if i > 15 { break; }
+        if i > 15 {
+            break;
+        }
         i += 1;
         factor /= radix_src_float;
         r += factor * (u.clone() as f64)
@@ -271,24 +243,20 @@ pub fn base_conv_float(
     r
 }
 
-pub fn str_to_arrnum(
-    src: &str,
-    radix_def_src : &RadixDef
-        ) -> Vec<u8> {
+pub fn str_to_arrnum(src: &str, radix_def_src: &RadixDef) -> Vec<u8> {
     let mut intermed_in: Vec<u8> = Vec::new();
     for c in src.chars() {
-        match radix_def_src.from_char::<>(c) {
-            Some(u) => { intermed_in.push(u); }
+        match radix_def_src.from_char(c) {
+            Some(u) => {
+                intermed_in.push(u);
+            }
             None => {} //todo err msg on incorrect
         }
     }
     intermed_in
 }
 
-pub fn arrnum_to_str(
-    src: &Vec<u8>,
-    radix_def_dest : &RadixDef
-        ) -> String {
+pub fn arrnum_to_str(src: &Vec<u8>, radix_def_dest: &RadixDef) -> String {
     let mut str_out = String::new();
     for u in src.iter() {
         match radix_def_dest.from_u8(u.clone()) {
@@ -302,18 +270,11 @@ pub fn arrnum_to_str(
 }
 
 #[allow(unused_variables)]
-pub fn base_conv_str(
-    src: &str,
-    radix_def_src : &RadixDef,
-    radix_def_dest : &RadixDef
-        ) -> String {
-    let intermed_in : Vec<u8> =
-        str_to_arrnum(src, radix_def_src);
-    let intermed_out = base_conv_vec(
-        &intermed_in,
+pub fn base_conv_str(src: &str, radix_def_src: &RadixDef, radix_def_dest: &RadixDef) -> String {
+    let intermed_in: Vec<u8> = str_to_arrnum(src, radix_def_src);
+    let intermed_out = base_conv_vec(&intermed_in,
                                      radix_def_src.get_max(),
-        radix_def_dest.get_max(),
-    );
+                                     radix_def_dest.get_max());
     arrnum_to_str(&intermed_out, radix_def_dest)
 }
 
@@ -329,36 +290,40 @@ const UPPER_A_ASC : u8 = 'A' as u8;
 const LOWER_A_ASC: u8 = 'a' as u8;
 
 impl RadixDef for RadixTen {
-    fn get_max(&self) -> u8 { 10 }
+    fn get_max(&self) -> u8 {
+        10
+    }
     fn from_char(&self, c: char) -> Option<u8> {
         match c {
             '0'...'9' => Some(c as u8 - ZERO_ASC),
-            _ => None
+            _ => None,
         }
     }
     fn from_u8(&self, u: u8) -> Option<char> {
         match u {
             0...9 => Some((ZERO_ASC + u) as char),
-            _ => None
+            _ => None,
         }
     }
 }
 pub struct RadixHex;
 impl RadixDef for RadixHex {
-    fn get_max(&self) -> u8 { 16 }
+    fn get_max(&self) -> u8 {
+        16
+    }
     fn from_char(&self, c: char) -> Option<u8> {
         match c {
             '0'...'9' => Some(c as u8 - ZERO_ASC),
             'A'...'F' => Some(c as u8 + 10 - UPPER_A_ASC),
             'a'...'f' => Some(c as u8 + 10 - LOWER_A_ASC),
-            _ => None
+            _ => None,
         }
     }
     fn from_u8(&self, u: u8) -> Option<char> {
         match u {
             0...9 => Some((ZERO_ASC + u) as char),
             10...15 => Some((UPPER_A_ASC + (u - 10)) as char),
-            _ => None
+            _ => None,
         }
     }
 }

src/printf/tokenize/num_format/formatters/base_conv/tests.rs

@@ -5,13 +5,12 @@ use super::*;
 #[test]
 fn test_arrnum_int_mult() {
     // (in base 10) 12 * 4 = 48
-    let factor : Vec<u8> = vec!(1, 2);
+    let factor: Vec<u8> = vec![1, 2];
     let base_num = 10;
     let base_ten_int_fact: u8 = 4;
     let should_output: Vec<u8> = vec![4, 8];
 
-    let product = arrnum_int_mult(&factor,
-                                         base_num, base_ten_int_fact);
+    let product = arrnum_int_mult(&factor, base_num, base_ten_int_fact);
     assert!(product == should_output);
 }
 
@@ -24,8 +23,7 @@ fn test_arrnum_int_non_base_10() {
     let base_ten_int_fact: u8 = 4;
     let should_output: Vec<u8> = vec![2, 0, 2];
 
-    let product = arrnum_int_mult(&factor,
-                                         base_num, base_ten_int_fact);
+    let product = arrnum_int_mult(&factor, base_num, base_ten_int_fact);
     assert!(product == should_output);
 }
 
@@ -38,7 +36,7 @@ fn test_arrnum_int_div_shortcircuit() {
     let remainder_passed_in = Remainder {
         position: 1,
         replace: vec![1, 3],
-        arr_num : &arrnum
+        arr_num: &arrnum,
     };
 
     // the "replace" should mean the number being divided
@@ -50,15 +48,8 @@ fn test_arrnum_int_div_shortcircuit() {
     let remainder_position_should_be: usize = 3;
     let remainder_replace_should_be = vec![1, 2];
 
-    let result = arrnum_int_div_step(remainder_passed_in,
-                                            base_num,
-                                            base_ten_int_divisor,
-                                            false
-                                            
-    );
+    let result = arrnum_int_div_step(remainder_passed_in, base_num, base_ten_int_divisor, false);
     assert!(quotient_should_be == result.quotient);
-    assert!(remainder_position_should_be ==
-            result.remainder.position);
-    assert!(remainder_replace_should_be ==
-            result.remainder.replace);                
+    assert!(remainder_position_should_be == result.remainder.position);
+    assert!(remainder_replace_should_be == result.remainder.replace);
 }

src/printf/tokenize/num_format/formatters/cninetyninehexfloatf.rs

@@ -1,14 +1,13 @@
 //! formatter for %a %F C99 Hex-floating-point subs
 use super::super::format_field::FormatField;
 use super::super::formatter::{InPrefix, FormatPrimitive, Formatter};
-use super::float_common::{FloatAnalysis,
-                          primitive_to_str_common};
+use super::float_common::{FloatAnalysis, primitive_to_str_common};
 use super::base_conv;
-use super::base_conv::{RadixDef};
+use super::base_conv::RadixDef;
 
 
 pub struct CninetyNineHexFloatf {
-    as_num : f64
+    as_num: f64,
 }
 impl CninetyNineHexFloatf {
     pub fn new() -> CninetyNineHexFloatf {
@@ -17,35 +16,26 @@ impl CninetyNineHexFloatf {
 }
 
 impl Formatter for CninetyNineHexFloatf {
-    fn get_primitive(
-        &self,
+    fn get_primitive(&self,
                      field: &FormatField,
                      inprefix: &InPrefix,
-        str_in : &str
-            ) -> Option<FormatPrimitive> {
+                     str_in: &str)
+                     -> Option<FormatPrimitive> {
         let second_field = field.second_field.unwrap_or(6) + 1;
-        let analysis = FloatAnalysis::analyze(
-            &str_in,
+        let analysis = FloatAnalysis::analyze(&str_in,
                                               inprefix,
                                               Some(second_field as usize),
                                               None,
                                               true);
-        let f = get_primitive_hex(
-            inprefix,
+        let f = get_primitive_hex(inprefix,
                                   &str_in[inprefix.offset..],
                                   &analysis,
                                   second_field as usize,
                                   *field.field_char == 'A');
         Some(f)
     }
-    fn primitive_to_str(
-        &self,
-        prim: &FormatPrimitive,
-        field: FormatField) -> String {
-        primitive_to_str_common(
-            prim,
-            &field
-            )
+    fn primitive_to_str(&self, prim: &FormatPrimitive, field: FormatField) -> String {
+        primitive_to_str_common(prim, &field)
     }
 }
 
@@ -54,48 +44,48 @@ impl Formatter for CninetyNineHexFloatf {
 // on the todo list is to have a trait for get_primitive that is implemented by each float formatter and can override a default. when that happens we can take the parts of get_primitive_dec specific to dec and spin them out to their own functions that can be overriden.
 #[allow(unused_variables)]
 #[allow(unused_assignments)]
-fn get_primitive_hex(
-    inprefix : &InPrefix,
+fn get_primitive_hex(inprefix: &InPrefix,
                      str_in: &str,
                      analysis: &FloatAnalysis,
                      last_dec_place: usize,
-    capitalized : bool
-) -> FormatPrimitive {
+                     capitalized: bool)
+                     -> FormatPrimitive {
 
     let mut f: FormatPrimitive = Default::default();
-    f.prefix = Some(String::from(
-        if inprefix.sign == -1 { "-0x" } else { "0x" }));
+    f.prefix = Some(String::from(if inprefix.sign == -1 {
+        "-0x"
+    } else {
+        "0x"
+    }));
 
     // assign the digits before and after the decimal points
     // to separate slices. If no digits after decimal point,
     // assign 0
-    let (mut first_segment_raw, second_segment_raw) =
-        match analysis.decimal_pos {
-            Some(pos) => {
-                (&str_in[..pos], &str_in[pos+1..])
-            },
-            None => { (&str_in[..], "0") }
+    let (mut first_segment_raw, second_segment_raw) = match analysis.decimal_pos {
+        Some(pos) => (&str_in[..pos], &str_in[pos + 1..]),
+        None => (&str_in[..], "0"),
     };
     if first_segment_raw.len() == 0 {
         first_segment_raw = "0";
     }
     // convert to string, hexifying if input is in dec.
-    /*let (first_segment, second_segment) =
-        match inprefix.radix_in {
-            Base::Ten => {
-                (to_hex(first_segment_raw, true),
-                 to_hex(second_segment_raw, false))
-            }
-            _ => {
-                (String::from(first_segment_raw),
-                 String::from(second_segment_raw))
-            }
-        };
+    // let (first_segment, second_segment) =
+    // match inprefix.radix_in {
+    // Base::Ten => {
+    // (to_hex(first_segment_raw, true),
+    // to_hex(second_segment_raw, false))
+    // }
+    // _ => {
+    // (String::from(first_segment_raw),
+    // String::from(second_segment_raw))
+    // }
+    // };
+    //
+    //
+    // f.pre_decimal = Some(first_segment);
+    // f.post_decimal = Some(second_segment);
+    //
 
-    
-    f.pre_decimal = Some(first_segment);
-    f.post_decimal = Some(second_segment);
-     */
     // TODO actual conversion, make sure to get back mantissa.
     // for hex to hex, it's really just a matter of moving the
     // decimal point and calculating the mantissa by its initial
@@ -111,7 +101,11 @@ fn get_primitive_hex(
     // directly to base 2 and then at the end translate back to hex.
     let mantissa = 0;
     f.suffix = Some({
-        let ind = if capitalized { "P" } else { "p" };
+        let ind = if capitalized {
+            "P"
+        } else {
+            "p"
+        };
         if mantissa >= 0 {
             format!("{}+{}", ind, mantissa)
         } else {
@@ -121,21 +115,15 @@ fn get_primitive_hex(
     f
 }
 
-fn to_hex(
-    src: &str,
-    before_decimal: bool
-        ) -> String {
+fn to_hex(src: &str, before_decimal: bool) -> String {
     let rten = base_conv::RadixTen;
     let rhex = base_conv::RadixHex;
     if before_decimal {
         base_conv::base_conv_str(src, &rten, &rhex)
     } else {
         let as_arrnum_ten = base_conv::str_to_arrnum(src, &rten);
-        let s = format!("{}", base_conv::base_conv_float(
-            &as_arrnum_ten,
-            rten.get_max(),
-            rhex.get_max()
-                ));
+        let s = format!("{}",
+                        base_conv::base_conv_float(&as_arrnum_ten, rten.get_max(), rhex.get_max()));
         if s.len() > 2 {
             String::from(&s[2..])
         } else {

src/printf/tokenize/num_format/formatters/decf.rs

@@ -1,23 +1,27 @@
 //! formatter for %g %G decimal subs
 use super::super::format_field::FormatField;
 use super::super::formatter::{InPrefix, FormatPrimitive, Formatter};
-use super::float_common::{FloatAnalysis,
-                          get_primitive_dec,
-                          primitive_to_str_common};
+use super::float_common::{FloatAnalysis, get_primitive_dec, primitive_to_str_common};
 
-fn get_len_fprim(
-    fprim : &FormatPrimitive
-        ) -> usize {
+fn get_len_fprim(fprim: &FormatPrimitive) -> usize {
     let mut len = 0;
-    if let Some(ref s) = fprim.prefix { len += s.len(); }
-    if let Some(ref s) = fprim.pre_decimal { len += s.len(); }
-    if let Some(ref s) = fprim.post_decimal { len += s.len(); }    
-    if let Some(ref s) = fprim.suffix { len += s.len(); }
+    if let Some(ref s) = fprim.prefix {
+        len += s.len();
+    }
+    if let Some(ref s) = fprim.pre_decimal {
+        len += s.len();
+    }
+    if let Some(ref s) = fprim.post_decimal {
+        len += s.len();
+    }
+    if let Some(ref s) = fprim.suffix {
+        len += s.len();
+    }
     len
 }
 
 pub struct Decf {
-    as_num : f64
+    as_num: f64,
 }
 impl Decf {
     pub fn new() -> Decf {
@@ -25,23 +29,20 @@ impl Decf {
     }
 }
 impl Formatter for Decf {
-    fn get_primitive(
-        &self,
+    fn get_primitive(&self,
                      field: &FormatField,
                      inprefix: &InPrefix,
-        str_in : &str
-            ) -> Option<FormatPrimitive> {
+                     str_in: &str)
+                     -> Option<FormatPrimitive> {
         let second_field = field.second_field.unwrap_or(6) + 1;
         // default to scif interp. so as to not truncate input vals
         // (that would be displayed in scif) based on relation to decimal place
-        let analysis = FloatAnalysis::analyze(
-            str_in,
+        let analysis = FloatAnalysis::analyze(str_in,
                                               inprefix,
                                               Some(second_field as usize + 1),
                                               None,
                                               false);
-        let mut f_sci = get_primitive_dec(
-            inprefix,
+        let mut f_sci = get_primitive_dec(inprefix,
                                           &str_in[inprefix.offset..],
                                           &analysis,
                                           second_field as usize,
@@ -53,34 +54,30 @@ impl Formatter for Decf {
                 {
                     let mut it = post_dec.chars();
                     while let Some(c) = it.next_back() {
-                        if c != '0' { break; }
+                        if c != '0' {
+                            break;
+                        }
                         i -= 1;
                     }
                 }
                 if i != post_dec.len() {
-                    f_sci.post_decimal =
-                        Some(String::from(&post_dec[0..i]));
+                    f_sci.post_decimal = Some(String::from(&post_dec[0..i]));
                 }
             }
             None => {}
         }
-        let f_fl = get_primitive_dec(
-            inprefix,
+        let f_fl = get_primitive_dec(inprefix,
                                      &str_in[inprefix.offset..],
                                      &analysis,
                                      second_field as usize,
                                      None);
         Some(if get_len_fprim(&f_fl) >= get_len_fprim(&f_sci) {
             f_sci
-        } else { f_fl })
+        } else {
+            f_fl
+        })
     }
-    fn primitive_to_str(
-        &self,
-        prim: &FormatPrimitive,
-        field: FormatField) -> String {
-        primitive_to_str_common(
-            prim,
-            &field
-            )
+    fn primitive_to_str(&self, prim: &FormatPrimitive, field: FormatField) -> String {
+        primitive_to_str_common(prim, &field)
     }
 }

src/printf/tokenize/num_format/formatters/float_common.rs

@@ -1,7 +1,7 @@
-use super::super::format_field::{FormatField};
+use super::super::format_field::FormatField;
 use super::super::formatter::{InPrefix, Base, FormatPrimitive, warn_incomplete_conv, get_it_at};
 use super::base_conv;
-use super::base_conv::{RadixDef};
+use super::base_conv::RadixDef;
 
 // if the memory, copy, and comparison cost of chars
 //  becomes an issue, we can always operate in vec<u8> here
@@ -11,15 +11,14 @@ pub struct FloatAnalysis {
     pub len_important: usize,
     // none means no decimal point.
     pub decimal_pos: Option<usize>,
-    pub follow: Option<char>
+    pub follow: Option<char>,
 }
-fn has_enough_digits(
-    hex_input: bool,
+fn has_enough_digits(hex_input: bool,
                      hex_output: bool,
                      string_position: usize,
                      starting_position: usize,
-    limit: usize,
-) -> bool {
+                     limit: usize)
+                     -> bool {
     // -1s are for rounding
     if hex_output {
         if hex_input {
@@ -38,13 +37,12 @@ fn has_enough_digits(
 }
 
 impl FloatAnalysis {
-    pub fn analyze(
-        str_in: &str,
+    pub fn analyze(str_in: &str,
                    inprefix: &InPrefix,
                    max_sd_opt: Option<usize>,
                    max_after_dec_opt: Option<usize>,
-        hex_output: bool
-        ) -> FloatAnalysis {
+                   hex_output: bool)
+                   -> FloatAnalysis {
         // this fn assumes
         // the input string
         // has no leading spaces or 0s
@@ -52,27 +50,32 @@ impl FloatAnalysis {
         let mut ret = FloatAnalysis {
             len_important: 0,
             decimal_pos: None,
-            follow: None
+            follow: None,
         };
         let hex_input = match inprefix.radix_in {
-            Base::Hex => { true }
-            Base::Ten => { false }
-            Base::Octal => { panic!("this should never happen: floats should never receive octal input"); }
+            Base::Hex => true,
+            Base::Ten => false,
+            Base::Octal => {
+                panic!("this should never happen: floats should never receive octal input");
+            }
         };
         let mut i = 0;
         let mut pos_before_first_nonzero_after_decimal: Option<usize> = None;
-        while let Some(c) = str_it.next() { match c{
+        while let Some(c) = str_it.next() {
+            match c {
                 e @ '0'...'9' | e @ 'A'...'F' | e @ 'a'...'f' => {
                     if !hex_input {
                         match e {
-                        '0'...'9' => {},
+                            '0'...'9' => {}
                             _ => {
                                 warn_incomplete_conv(str_in);
                                 break;
                             }
                         }
                     }
-                if ret.decimal_pos.is_some() && pos_before_first_nonzero_after_decimal.is_none() && e != '0' {
+                    if ret.decimal_pos.is_some() &&
+                       pos_before_first_nonzero_after_decimal.is_none() &&
+                       e != '0' {
                         pos_before_first_nonzero_after_decimal = Some(i - 1);
                     }
                     if let Some(max_sd) = max_sd_opt {
@@ -99,7 +102,7 @@ impl FloatAnalysis {
                             }
                         }
                     }
-            },
+                }
                 '.' => {
                     if ret.decimal_pos.is_none() {
                         ret.decimal_pos = Some(i);
@@ -112,27 +115,23 @@ impl FloatAnalysis {
                     warn_incomplete_conv(str_in);
                     break;
                 }
-        }; i+=1; }
+            };
+            i += 1;
+        }
         ret.len_important = i;
         ret
     }
 }
 
-fn de_hex(
-    src: &str,
-    before_decimal: bool
-        ) -> String {
+fn de_hex(src: &str, before_decimal: bool) -> String {
     let rten = base_conv::RadixTen;
     let rhex = base_conv::RadixHex;
     if before_decimal {
         base_conv::base_conv_str(src, &rhex, &rten)
     } else {
         let as_arrnum_hex = base_conv::str_to_arrnum(src, &rhex);
-        let s = format!("{}", base_conv::base_conv_float(
-            &as_arrnum_hex,
-            rhex.get_max(),
-            rten.get_max()
-                ));
+        let s = format!("{}",
+                        base_conv::base_conv_float(&as_arrnum_hex, rhex.get_max(), rten.get_max()));
         if s.len() > 2 {
             String::from(&s[2..])
         } else {
@@ -147,10 +146,7 @@ fn de_hex(
 // bumps the last digit up one,
 // and if the digit was nine
 // propagate to the next, etc.
-fn _round_str_from(
-    in_str : &str,
-    position : usize
-        ) -> (String, bool) {
+fn _round_str_from(in_str: &str, position: usize) -> (String, bool) {
 
     let mut it = in_str[0..position].chars();
     let mut rev = String::new();
@@ -159,10 +155,11 @@ fn _round_str_from(
     while let Some(c) = it.next_back() {
         i -= 1;
         match c {
-            '9' => { rev.push('0'); }
+            '9' => {
+                rev.push('0');
+            }
             e @ _ => {
-                rev.push(
-                    ((e as u8)+1) as char);
+                rev.push(((e as u8) + 1) as char);
                 finished_in_dec = true;
                 break;
             }                        
@@ -175,45 +172,42 @@ fn _round_str_from(
     (fwd, finished_in_dec)
 }
 
-fn round_terminal_digit(
-    before_dec: String,
+fn round_terminal_digit(before_dec: String,
                         after_dec: String,
-    position: usize
-        ) -> (String, String) {
+                        position: usize)
+                        -> (String, String) {
 
     if position < after_dec.len() {
         let digit_at_pos: char;
         {
             digit_at_pos = (&after_dec[position..position + 1])
-                .chars().next().expect("");
+                               .chars()
+                               .next()
+                               .expect("");
         }
         match digit_at_pos {
             '5'...'9' => {
-                let (new_after_dec, finished_in_dec) =
-                    _round_str_from(&after_dec, position);
+                let (new_after_dec, finished_in_dec) = _round_str_from(&after_dec, position);
                 if finished_in_dec {
-                    return (before_dec, new_after_dec)
+                    return (before_dec, new_after_dec);
                 } else {
-                    let (new_before_dec, _) =
-                        _round_str_from(&before_dec,
-                                        before_dec.len());
-                    return (new_before_dec, new_after_dec)
+                    let (new_before_dec, _) = _round_str_from(&before_dec, before_dec.len());
+                    return (new_before_dec, new_after_dec);
                 }
                 // TODO
-            },
+            }
             _ => {}
         }
     }
     (before_dec, after_dec)
 }
 
-pub fn get_primitive_dec(
-    inprefix : &InPrefix,
+pub fn get_primitive_dec(inprefix: &InPrefix,
                          str_in: &str,
                          analysis: &FloatAnalysis,
                          last_dec_place: usize,
-    sci_mode : Option<bool>
-    ) -> FormatPrimitive {
+                         sci_mode: Option<bool>)
+                         -> FormatPrimitive {
     let mut f: FormatPrimitive = Default::default();
 
     // add negative sign section
@@ -224,19 +218,15 @@ pub fn get_primitive_dec(
     // assign the digits before and after the decimal points
     // to separate slices. If no digits after decimal point,
     // assign 0
-    let (mut first_segment_raw, second_segment_raw) =
-        match analysis.decimal_pos {
-            Some(pos) => {
-                (&str_in[..pos], &str_in[pos+1..])
-            },
-            None => { (&str_in[..], "0") }
+    let (mut first_segment_raw, second_segment_raw) = match analysis.decimal_pos {
+        Some(pos) => (&str_in[..pos], &str_in[pos + 1..]),
+        None => (&str_in[..], "0"),
     };
     if first_segment_raw.len() == 0 {
         first_segment_raw = "0";
     }
     // convert to string, de_hexifying if input is in hex.
-    let (first_segment, second_segment) =
-        match inprefix.radix_in {
+    let (first_segment, second_segment) = match inprefix.radix_in {
         Base::Hex => {
             (de_hex(first_segment_raw, true),
              de_hex(second_segment_raw, false))
@@ -246,8 +236,7 @@ pub fn get_primitive_dec(
              String::from(second_segment_raw))
         }
     };
-    let (pre_dec_unrounded, post_dec_unrounded, mantissa) =
-        if sci_mode.is_some() {
+    let (pre_dec_unrounded, post_dec_unrounded, mantissa) = if sci_mode.is_some() {
         if first_segment.len() > 1 {
             let mut post_dec = String::from(&first_segment[1..]);
             post_dec.push_str(&second_segment);
@@ -261,25 +250,22 @@ pub fn get_primitive_dec(
                     let mut m: isize = 0;
                     let mut pre = String::from("0");
                     let mut post = String::from("0");
-                        while let Some((i,c)) = it.next() { match c {
+                    while let Some((i, c)) = it.next() {
+                        match c {
                             '0' => {}
                             _ => {
                                 m = ((i as isize) + 1) * -1;
-                                pre = String::from(
-                                    &second_segment[i..i+1]);
-                                post = String::from(
-                                    &second_segment[i+1..]);
+                                pre = String::from(&second_segment[i..i + 1]);
+                                post = String::from(&second_segment[i + 1..]);
                                 break;
                             }
-                        } }
+                        }
+                    }
                     (pre, post, m)
-                    },
-                    Some(_) => {
-                        (first_segment, second_segment, 0)
-                    },
+                }
+                Some(_) => (first_segment, second_segment, 0),
                 None => {
-                        panic!(
-                           "float_common: no chars in first segment.");
+                    panic!("float_common: no chars in first segment.");
                 }
             }
         }
@@ -287,15 +273,18 @@ pub fn get_primitive_dec(
         (first_segment, second_segment, 0)
     };
 
-    let (pre_dec_draft, post_dec_draft) =
-        round_terminal_digit(pre_dec_unrounded,
+    let (pre_dec_draft, post_dec_draft) = round_terminal_digit(pre_dec_unrounded,
                                                                post_dec_unrounded,
                                                                last_dec_place - 1);
 
     f.pre_decimal = Some(pre_dec_draft);
     f.post_decimal = Some(post_dec_draft);
     if let Some(capitalized) = sci_mode {
-        let si_ind = if capitalized { 'E' } else { 'e' };
+        let si_ind = if capitalized {
+            'E'
+        } else {
+            'e'
+        };
         f.suffix = Some(if mantissa >= 0 {
             format!("{}+{:02}", si_ind, mantissa)
         } else {
@@ -308,15 +297,12 @@ pub fn get_primitive_dec(
     f
 }
 
-pub fn primitive_to_str_common(
-    prim: &FormatPrimitive,
-    field: &FormatField
-        ) -> String {
+pub fn primitive_to_str_common(prim: &FormatPrimitive, field: &FormatField) -> String {
     let mut final_str = String::new();
     match prim.prefix {
         Some(ref prefix) => {
             final_str.push_str(&prefix);
-        },
+        }
         None => {}
     }
     match prim.pre_decimal {
@@ -324,7 +310,8 @@ pub fn primitive_to_str_common(
             final_str.push_str(&pre_decimal);
         }
         None => {
-            panic!("error, format primitives provided to int, will, incidentally under correct behavior, always have a pre_dec value.");
+            panic!("error, format primitives provided to int, will, incidentally under correct \
+                    behavior, always have a pre_dec value.");
         }            
     }
     let decimal_places = field.second_field.unwrap_or(6);
@@ -338,8 +325,7 @@ pub fn primitive_to_str_common(
                     // println!("dec {}, len avail {}", decimal_places, len_avail);
                     final_str.push_str(post_decimal);
 
-                    if *field.field_char != 'g' &&
-                        *field.field_char != 'G' {
+                    if *field.field_char != 'g' && *field.field_char != 'G' {
                         let diff = decimal_places - len_avail;
                         for _ in 0..diff {
                             final_str.push('0');
@@ -347,19 +333,19 @@ pub fn primitive_to_str_common(
                     }
                 } else {
                     // println!("printing to only {}", decimal_places);
-                    final_str.push_str(
-                        &post_decimal[0..decimal_places as usize]);
+                    final_str.push_str(&post_decimal[0..decimal_places as usize]);
                 }
             }
         }
         None => {
-            panic!("error, format primitives provided to int, will, incidentally under correct behavior, always have a pre_dec value.");
+            panic!("error, format primitives provided to int, will, incidentally under correct \
+                    behavior, always have a pre_dec value.");
         }
     }
     match prim.suffix {
         Some(ref suffix) => {
             final_str.push_str(suffix);
-        },
+        }
         None => {}
     }
 

src/printf/tokenize/num_format/formatters/floatf.rs

@@ -1,12 +1,10 @@
 //! formatter for %f %F common-notation floating-point subs
 use super::super::format_field::FormatField;
 use super::super::formatter::{InPrefix, FormatPrimitive, Formatter};
-use super::float_common::{FloatAnalysis,
-                          get_primitive_dec,
-                          primitive_to_str_common};
+use super::float_common::{FloatAnalysis, get_primitive_dec, primitive_to_str_common};
 
 pub struct Floatf {
-    as_num : f64
+    as_num: f64,
 }
 impl Floatf {
     pub fn new() -> Floatf {
@@ -14,35 +12,25 @@ impl Floatf {
     }
 }
 impl Formatter for Floatf {
-    fn get_primitive(
-        &self,
+    fn get_primitive(&self,
                      field: &FormatField,
                      inprefix: &InPrefix,
-        str_in : &str
-            ) -> Option<FormatPrimitive> {
+                     str_in: &str)
+                     -> Option<FormatPrimitive> {
         let second_field = field.second_field.unwrap_or(6) + 1;
-        let analysis = FloatAnalysis::analyze(
-            &str_in,
+        let analysis = FloatAnalysis::analyze(&str_in,
                                               inprefix,
                                               None,
                                               Some(second_field as usize),
                                               false);
-        let f = get_primitive_dec(
-            inprefix,
+        let f = get_primitive_dec(inprefix,
                                   &str_in[inprefix.offset..],
                                   &analysis,
                                   second_field as usize,
                                   None);
         Some(f)
     }
-    fn primitive_to_str(
-        &self,
-        prim: &FormatPrimitive,
-        field: FormatField) -> String {
-        primitive_to_str_common(
-            prim,
-            &field
-            )
+    fn primitive_to_str(&self, prim: &FormatPrimitive, field: FormatField) -> String {
+        primitive_to_str_common(prim, &field)
     }
 }
-

src/printf/tokenize/num_format/formatters/intf.rs

@@ -4,10 +4,11 @@
 use std::u64;
 use std::i64;
 use super::super::format_field::FormatField;
-use super::super::formatter::{InPrefix,FormatPrimitive,Base,Formatter,warn_incomplete_conv,get_it_at};
+use super::super::formatter::{InPrefix, FormatPrimitive, Base, Formatter, warn_incomplete_conv,
+                              get_it_at};
 
 pub struct Intf {
-    a : u32
+    a: u32,
 }
 
 // see the Intf::analyze() function below
@@ -15,7 +16,7 @@ struct IntAnalysis {
     check_past_max: bool,
     past_max: bool,
     is_zero: bool,
-    len_digits: u8
+    len_digits: u8,
 }
 
 impl Intf {
@@ -34,41 +35,37 @@ impl Intf {
     // is_zero: true if number is zero, false otherwise
     // len_digits: length of digits used to create the int
     //   important, for example, if we run into a non-valid character
-    fn analyze(
-        str_in: &str,
-        signed_out: bool,
-        inprefix: &InPrefix
-            ) -> IntAnalysis {
+    fn analyze(str_in: &str, signed_out: bool, inprefix: &InPrefix) -> IntAnalysis {
         // the maximum number of digits we could conceivably
         // have before the decimal point without exceeding the
         // max
         let mut str_it = get_it_at(inprefix.offset, str_in);
-        let max_sd_in =
-            if signed_out {
+        let max_sd_in = if signed_out {
             match inprefix.radix_in {
                 Base::Ten => 19,
                 Base::Octal => 21,
-                    Base::Hex => 16
+                Base::Hex => 16,
             }
         } else {
             match inprefix.radix_in {
                 Base::Ten => 20,
                 Base::Octal => 22,
-                    Base::Hex => 16
+                Base::Hex => 16,
             }
         };
         let mut ret = IntAnalysis {
             check_past_max: false,
             past_max: false,
             is_zero: false,
-            len_digits : 0
+            len_digits: 0,
         };
 
         // todo turn this to a while let now that we know
         // no special behavior on EOI break
         loop {
             let c_opt = str_it.next();
-            if let Some(c) = c_opt { match c {
+            if let Some(c) = c_opt {
+                match c {
                     '0'...'9' | 'a'...'f' | 'A'...'F' => {
                         if ret.len_digits == 0 && c == '0' {
                             ret.is_zero = true;
@@ -96,15 +93,20 @@ impl Intf {
                                         str_it.put_back(next_ch);
                                     }
                                 }
-                            if ret.past_max { break; }
-                        } else { ret.check_past_max = true; }
+                                if ret.past_max {
+                                    break;
+                                }
+                            } else {
+                                ret.check_past_max = true;
+                            }
                         }
                     }
                     _ => {
                         warn_incomplete_conv(str_in);
                         break;
                     }
-            } } else {
+                }
+            } else {
                 // breaks on EOL
                 break;
             }
@@ -113,22 +115,21 @@ impl Intf {
     }
     // get a FormatPrimitive of the maximum value for the field char
     //  and given sign
-    fn get_max(
-        fchar : char,
-        sign : i8
-        ) -> FormatPrimitive {
+    fn get_max(fchar: char, sign: i8) -> FormatPrimitive {
         let mut fmt_prim: FormatPrimitive = Default::default();
         fmt_prim.pre_decimal = Some(String::from(match fchar {
-            'd' | 'i' => match sign {
+            'd' | 'i' => {
+                match sign {
                     1 => "9223372036854775807",
                     _ => {
                         fmt_prim.prefix = Some(String::from("-"));
                         "9223372036854775808"
                     }
-            },
+                }
+            }
             'x' | 'X' => "ffffffffffffffff",
             'o' => "1777777777777777777777",
-            'u' | _ => "18446744073709551615"
+            'u' | _ => "18446744073709551615",
         }));
         fmt_prim
     }
@@ -147,59 +148,50 @@ impl Intf {
     // - if the string falls outside bounds:
     //   for i64 output, the int minimum or int max (depending on sign)
     //   for u64 output, the u64 max in the output radix
-    fn conv_from_segment(
-        segment : &str,
-        radix_in : Base,
-        fchar : char,
-        sign : i8,
-            ) ->
-        FormatPrimitive
-    {
+    fn conv_from_segment(segment: &str, radix_in: Base, fchar: char, sign: i8) -> FormatPrimitive {
         match fchar {
             'i' | 'd' => {
                 match i64::from_str_radix(segment, radix_in as u32) {
                     Ok(i) => {
-                        let mut fmt_prim : FormatPrimitive =
-                            Default::default();
+                        let mut fmt_prim: FormatPrimitive = Default::default();
                         if sign == -1 {
                             fmt_prim.prefix = Some(String::from("-"));
                         }
-                        fmt_prim.pre_decimal =
-                            Some(format!("{}", i));
+                        fmt_prim.pre_decimal = Some(format!("{}", i));
                         fmt_prim
                     }
-                    Err(_) => Intf::get_max(fchar, sign)
+                    Err(_) => Intf::get_max(fchar, sign),
+                }
             }
-            },
             _ => {
                 match u64::from_str_radix(segment, radix_in as u32) {
                     Ok(u) => {
-                        let mut fmt_prim : FormatPrimitive =
-                            Default::default();
-                        let u_f =
-                            if sign == -1 { u64::MAX - (u -1)
-                            } else { u };
+                        let mut fmt_prim: FormatPrimitive = Default::default();
+                        let u_f = if sign == -1 {
+                            u64::MAX - (u - 1)
+                        } else {
+                            u
+                        };
                         fmt_prim.pre_decimal = Some(match fchar {
                             'X' => format!("{:X}", u_f),
                             'x' => format!("{:x}", u_f),
                             'o' => format!("{:o}", u_f),
-                            _ => format!("{}", u_f)
+                            _ => format!("{}", u_f),
                         });
                         fmt_prim
                     }
-                    Err(_) => Intf::get_max(fchar, sign)
+                    Err(_) => Intf::get_max(fchar, sign),
                 }
             }
         }
     }
 }
 impl Formatter for Intf {
-    fn get_primitive(
-        &self,
+    fn get_primitive(&self,
                      field: &FormatField,
                      inprefix: &InPrefix,
-        str_in : &str
-        ) -> Option<FormatPrimitive> {
+                     str_in: &str)
+                     -> Option<FormatPrimitive> {
 
         let begin = inprefix.offset;
 
@@ -219,23 +211,20 @@ impl Formatter for Intf {
             let radix_out = match *field.field_char {
                 'd' | 'i' | 'u' => Base::Ten,
                 'x' | 'X' => Base::Hex,
-                'o' | _ => Base::Octal
+                'o' | _ => Base::Octal,
             };
             let radix_mismatch = !radix_out.eq(&inprefix.radix_in);
-            let decr_from_max :bool = inprefix.sign == -1 &&
-                *field.field_char !='i';
+            let decr_from_max: bool = inprefix.sign == -1 && *field.field_char != 'i';
             let end = begin + convert_hints.len_digits as usize;
 
             // convert to int if any one of these is true:
             // - number of digits in int indicates it may be past max
             // - we're subtracting from the max
             // - we're converting the base
-            if convert_hints.check_past_max
-                || decr_from_max || radix_mismatch {
+            if convert_hints.check_past_max || decr_from_max || radix_mismatch {
                 // radix of in and out is the same.
                 let segment = String::from(&str_in[begin..end]);
-                let m = Intf::conv_from_segment(
-                    &segment,
+                let m = Intf::conv_from_segment(&segment,
                                                 inprefix.radix_in.clone(),
                                                 *field.field_char,
                                                 inprefix.sign);
@@ -251,8 +240,7 @@ impl Formatter for Intf {
 
                     fmt_prim.prefix = Some(String::from("-"));
                 }
-                fmt_prim.pre_decimal = Some(String::from
-                                            (&str_in[begin..end]));
+                fmt_prim.pre_decimal = Some(String::from(&str_in[begin..end]));
                 fmt_prim
             }
         } else {
@@ -260,15 +248,12 @@ impl Formatter for Intf {
         })
 
     }
-    fn primitive_to_str(
-        &self,
-        prim: &FormatPrimitive,
-        field: FormatField) -> String {        
+    fn primitive_to_str(&self, prim: &FormatPrimitive, field: FormatField) -> String {
         let mut finalstr: String = String::new();
         match prim.prefix {
             Some(ref prefix) => {
                 finalstr.push_str(&prefix);
-            },
+            }
             None => {}
         }
         // integral second fields is zero-padded minimum-width
@@ -289,7 +274,8 @@ impl Formatter for Intf {
                 finalstr.push_str(&pre_decimal);
             }
             None => {
-                panic!("error, format primitives provided to int, will, incidentally under correct behavior, always have a pre_dec value.");
+                panic!("error, format primitives provided to int, will, incidentally under \
+                        correct behavior, always have a pre_dec value.");
             }
         }
         finalstr

src/printf/tokenize/num_format/formatters/scif.rs

@@ -1,12 +1,10 @@
 //! formatter for %e %E scientific notation subs
 use super::super::format_field::FormatField;
 use super::super::formatter::{InPrefix, FormatPrimitive, Formatter};
-use super::float_common::{FloatAnalysis,
-                          get_primitive_dec,
-                          primitive_to_str_common};
+use super::float_common::{FloatAnalysis, get_primitive_dec, primitive_to_str_common};
 
 pub struct Scif {
-    as_num : f64
+    as_num: f64,
 }
 impl Scif {
     pub fn new() -> Scif {
@@ -14,34 +12,25 @@ impl Scif {
     }
 }
 impl Formatter for Scif {
-    fn get_primitive(
-        &self,
+    fn get_primitive(&self,
                      field: &FormatField,
                      inprefix: &InPrefix,
-        str_in : &str
-            ) -> Option<FormatPrimitive> {
+                     str_in: &str)
+                     -> Option<FormatPrimitive> {
         let second_field = field.second_field.unwrap_or(6) + 1;
-        let analysis = FloatAnalysis::analyze(
-            str_in,
+        let analysis = FloatAnalysis::analyze(str_in,
                                               inprefix,
                                               Some(second_field as usize + 1),
                                               None,
                                               false);
-        let f = get_primitive_dec(
-            inprefix,
+        let f = get_primitive_dec(inprefix,
                                   &str_in[inprefix.offset..],
                                   &analysis,
                                   second_field as usize,
                                   Some(*field.field_char == 'E'));
         Some(f)
     }
-    fn primitive_to_str(
-        &self,
-        prim: &FormatPrimitive,
-        field: FormatField) -> String {
-        primitive_to_str_common(
-            prim,
-            &field
-            )
+    fn primitive_to_str(&self, prim: &FormatPrimitive, field: FormatField) -> String {
+        primitive_to_str_common(prim, &field)
     }
 }

src/printf/tokenize/num_format/num_format.rs

@@ -24,8 +24,10 @@ fn warn_char_constant_ign(remaining_bytes: Vec<u8>) {
         Err(e) => {
             match e {
                 env::VarError::NotPresent => {
-                        cli::err_msg(&format!("warning: {:?}: character(s) following character constant have been ignored", &*remaining_bytes));
-                },
+                    cli::err_msg(&format!("warning: {:?}: character(s) following character \
+                                           constant have been ignored",
+                                          &*remaining_bytes));
+                }
                 _ => {}
             }
         }
@@ -35,9 +37,7 @@ fn warn_char_constant_ign(remaining_bytes: Vec<u8>) {
 // this function looks at the first few
 // characters of an argument and returns a value if we can learn
 // a value from that (e.g. no argument? return 0, char constant? ret value)
-fn get_provided(
-    str_in_opt : Option<&String>
-        ) -> Option<u8> {            
+fn get_provided(str_in_opt: Option<&String>) -> Option<u8> {
     const C_S_QUOTE: u8 = 39;
     const C_D_QUOTE: u8 = 34;
     match str_in_opt {
@@ -56,23 +56,26 @@ fn get_provided(
                                     warn_char_constant_ign(ignored);
                                 }
                                 second_byte as u8
-                            },
+                            }
                             // no byte after quote
                             None => {
-                                let so_far =
-                                    (qchar as u8 as char).to_string();
+                                let so_far = (qchar as u8 as char).to_string();
                                 warn_expected_numeric(&so_far);
                                 0 as u8
                             }
                         });
-                    },
+                    }
                     // first byte is not quote
-                    _ => { return None; }
+                    _ => {
+                        return None;
+                    }
                     // no first byte
                 }
-            } else { Some(0 as u8) }
+            } else {
+                Some(0 as u8)
             }
-        None =>{ Some(0) }
+        }
+        None => Some(0),
     }
 }
 
@@ -81,26 +84,38 @@ fn get_provided(
 // a base,
 // and an offset for index after all
 //  initial spacing, sign, base prefix, and leading zeroes
-fn get_inprefix(
-    str_in : &String,
-    field_type : &FieldType
-        ) -> InPrefix {
+fn get_inprefix(str_in: &String, field_type: &FieldType) -> InPrefix {
     let mut str_it = str_in.chars();
-    let mut ret = InPrefix { radix_in: Base::Ten, sign: 1, offset: 0 };
+    let mut ret = InPrefix {
+        radix_in: Base::Ten,
+        sign: 1,
+        offset: 0,
+    };
     let mut topchar = str_it.next().clone();
     // skip spaces and ensure topchar is the first non-space char
     // (or None if none exists)
     loop {
-        match topchar
-        {
-            Some(' ')=>{ret.offset+=1; topchar=str_it.next();},
-            _=>{ break; }
+        match topchar {
+            Some(' ') => {
+                ret.offset += 1;
+                topchar = str_it.next();
+            }
+            _ => {
+                break;
+            }
         }
     }
     // parse sign
     match topchar {
-        Some('+')=>{ ret.offset+=1; topchar=str_it.next(); }
-        Some('-')=>{ ret.sign = -1; ret.offset+=1; topchar=str_it.next(); }
+        Some('+') => {
+            ret.offset += 1;
+            topchar = str_it.next();
+        }
+        Some('-') => {
+            ret.sign = -1;
+            ret.offset += 1;
+            topchar = str_it.next();
+        }
         _ => {}
     }
     // we want to exit with offset being
@@ -128,13 +143,13 @@ fn get_inprefix(
                     ret.offset += 2;
                     ret.radix_in = Base::Hex;
                     do_clean_lead_zeroes = true;
-                },
+                }
                 e @ '0'...'9' => {
                     ret.offset += 1;
                     match *field_type {
                         FieldType::Intf => {
                             ret.radix_in = Base::Octal;
-                        },
+                        }
                         _ => {}                        
                     }
                     if e == '0' {
@@ -159,21 +174,25 @@ fn get_inprefix(
                     // current offset is not the final offset.
                     match ch_zero {
                         '0' => {
-                            if !(is_hex && first) { ret.offset+=1; }
-                        },
+                            if !(is_hex && first) {
+                                ret.offset += 1;
+                            }
+                        }
                         // if decimal, keep last zero if one exists
                         // (it's possible for last zero to
                         // not exist at this branch if we're in hex input)
-                        '.' => {
-                            break
-                        }, 
+                        '.' => break, 
                         // other digit, etc.
                         _ => {
-                            if !(is_hex && first) { ret.offset+=1; }
-                            break
+                            if !(is_hex && first) {
+                                ret.offset += 1;
+                            }
+                            break;
                         }
                     }
-                    if first { first = false; }
+                    if first {
+                        first = false;
+                    }
 
                 }
             }
@@ -185,10 +204,7 @@ fn get_inprefix(
 // this is the function a Sub's print will delegate to
 // if it is a numeric field, passing the field details
 // and an iterator to the argument
-pub fn num_format(
-    field: &FormatField,
-    in_str_opt: Option<&String>
-        ) -> Option<String> {
+pub fn num_format(field: &FormatField, in_str_opt: Option<&String>) -> Option<String> {
 
 
     let fchar = field.field_char.clone();
@@ -204,7 +220,9 @@ pub fn num_format(
         FieldType::CninetyNineHexFloatf => Box::new(CninetyNineHexFloatf::new()),
         FieldType::Scif => Box::new(Scif::new()),
         FieldType::Decf => Box::new(Decf::new()),
-        _ => { panic!("asked to do num format with non-num fieldtype"); }
+        _ => {
+            panic!("asked to do num format with non-num fieldtype");
+        }
     };
     let prim_opt=
         // if we can get an assumed value from looking at the first
@@ -259,12 +277,7 @@ pub fn num_format(
     // if we have a formatPrimitive, print its results
     // according to the field-char appropriate Formatter
     if let Some(prim) = prim_opt {
-        Some( 
-            fmtr.primitive_to_str(
-                &prim,
-                field.clone()
-                    )
-             )
+        Some(fmtr.primitive_to_str(&prim, field.clone()))
     } else {
         None
     }

src/printf/tokenize/sub.rs

@@ -34,17 +34,17 @@ fn convert_asterisk_arg_int(asterisk_arg : &String) -> isize {
         second_field: Some(0),
         orig: asterisk_arg,
         field_type: &field_type,
-            field_char: &field_char
+        field_char: &field_char,
     };
-    num_format::num_format(
-        &field_info,
-        Some(asterisk_arg)
-    ).unwrap().parse::<isize>().unwrap()
+    num_format::num_format(&field_info, Some(asterisk_arg))
+        .unwrap()
+        .parse::<isize>()
+        .unwrap()
 }
 
 pub enum CanAsterisk<T> {
     Fixed(T),
-    Asterisk
+    Asterisk,
 }
 
 // Sub is a tokenizer which creates tokens
@@ -54,13 +54,14 @@ pub struct Sub {
     second_field: CanAsterisk<Option<u32>>,
     field_char: char,
     field_type: FieldType,
-    orig: String
+    orig: String,
 }
 impl Sub {
     pub fn new(min_width: CanAsterisk<Option<isize>>,
                second_field: CanAsterisk<Option<u32>>,
                field_char: char,
-               orig: String) -> Sub {
+               orig: String)
+               -> Sub {
         // for more dry printing, field characters are grouped
         // in initialization of token.
         let field_type = match field_char {
@@ -82,10 +83,9 @@ impl Sub {
             second_field: second_field,
             field_char: field_char,
             field_type: field_type,
-            orig: orig
+            orig: orig,
         }
     }
-
 }
 
 struct SubParser {
@@ -96,7 +96,7 @@ struct SubParser {
     second_field_is_asterisk: bool,
     specifiers_found: bool,
     field_char: Option<char>,
-    text_so_far : String
+    text_so_far: String,
 }
 
 impl SubParser {
@@ -109,7 +109,7 @@ impl SubParser {
             second_field_is_asterisk: false,
             specifiers_found: false,
             field_char: None,
-            text_so_far : String::new()
+            text_so_far: String::new(),
         }
     }
     fn from_it(it: &mut PutBackN<Chars>,
@@ -127,9 +127,7 @@ impl SubParser {
     fn build_token(parser: SubParser) -> Box<token::Token> {
         // not a self method so as to allow move of subparser vals.
         // return new Sub struct as token
-        let t: Box<token::Token> = Box::new(
-            Sub::new(
-                if parser.min_width_is_asterisk {
+        let t: Box<token::Token> = Box::new(Sub::new(if parser.min_width_is_asterisk {
                                                          CanAsterisk::Asterisk
                                                      } else {
                                                          CanAsterisk::Fixed(parser.min_width_tmp.map(|x| x.parse::<isize>().unwrap()))
@@ -140,14 +138,10 @@ impl SubParser {
                                                          CanAsterisk::Fixed(parser.second_field_tmp.map(|x| x.parse::<u32>().unwrap()))
                                                      },
                                                      parser.field_char.unwrap(),
-                parser.text_so_far
-            )
-        );
+                                                     parser.text_so_far));
         t
     }
-    fn sub_vals_retrieved(&mut self,
-               it: &mut PutBackN<Chars>)
-               -> bool {
+    fn sub_vals_retrieved(&mut self, it: &mut PutBackN<Chars>) -> bool {
 
         if !SubParser::successfully_eat_prefix(it, &mut self.text_so_far) {
             return false;
@@ -158,10 +152,22 @@ impl SubParser {
         // though, as we want to mimic the original behavior of printing
         // the field as interpreted up until the error in the field.
 
-        let mut legal_fields=vec![
-            //'a', 'A', //c99 hex float implementation not yet complete
-                                  'b', 'c', 'd', 'e', 'E', 'f',
-                                  'F', 'g', 'G', 'i', 'o','s', 'u', 'x', 'X'];
+        let mut legal_fields = vec![// 'a', 'A', //c99 hex float implementation not yet complete
+                                    'b',
+                                    'c',
+                                    'd',
+                                    'e',
+                                    'E',
+                                    'f',
+                                    'F',
+                                    'g',
+                                    'G',
+                                    'i',
+                                    'o',
+                                    's',
+                                    'u',
+                                    'x',
+                                    'X'];
         let mut specifiers = vec!['h', 'j', 'l', 'L', 't', 'z'];
         legal_fields.sort();
         specifiers.sort();
@@ -173,8 +179,7 @@ impl SubParser {
             match ch as char {
                 '-' | '*' | '0'...'9' => {
                     if !self.past_decimal {
-                        if self.min_width_is_asterisk
-                            || self.specifiers_found {
+                        if self.min_width_is_asterisk || self.specifiers_found {
                             err_conv(&self.text_so_far);
                         }
                         if self.min_width_tmp.is_none() {
@@ -190,14 +195,14 @@ impl SubParser {
                                 }
                                 x.push(ch);
                             }
-                            None => { panic!("should be unreachable"); } 
+                            None => {
+                                panic!("should be unreachable");
+                            } 
                         }
                     } else {
                         // second field should never have a
                         // negative value
-                        if self.second_field_is_asterisk
-                            || ch == '-'
-                            || self.specifiers_found {
+                        if self.second_field_is_asterisk || ch == '-' || self.specifiers_found {
                             err_conv(&self.text_so_far);
                         }
                         if self.second_field_tmp.is_none() {
@@ -213,21 +218,23 @@ impl SubParser {
                                 }
                                 x.push(ch);
                             }
-                            None => { panic!("should be unreachable"); } 
+                            None => {
+                                panic!("should be unreachable");
+                            } 
+                        }
                     }
                 }
-                },
                 '.' => {
                     if !self.past_decimal {
                         self.past_decimal = true;
                     } else {
                         err_conv(&self.text_so_far);
                     }
-                },
+                }
                 x if legal_fields.binary_search(&x).is_ok() => {
                     self.field_char = Some(ch);
                     self.text_so_far.push(ch);
-                    break
+                    break;
                 }
                 x if specifiers.binary_search(&x).is_ok() => {
                     if !self.past_decimal {
@@ -242,8 +249,9 @@ impl SubParser {
                 }
             }
         }
-        if ! self.field_char.is_some()
-        { err_conv(&self.text_so_far); }
+        if !self.field_char.is_some() {
+            err_conv(&self.text_so_far);
+        }
         let field_char_retrieved = self.field_char.unwrap();
         if self.past_decimal && self.second_field_tmp.is_none() {
             self.second_field_tmp = Some(String::from("0"));
@@ -262,15 +270,13 @@ impl SubParser {
 
         true
     }
-    fn successfully_eat_prefix(it: &mut PutBackN<Chars>,
-                text_so_far : &mut String ) -> bool {
+    fn successfully_eat_prefix(it: &mut PutBackN<Chars>, text_so_far: &mut String) -> bool {
         // get next two chars,
         // if they're '%%' we're not tokenizing it
         // else put chars back
         let preface = it.next();
         let n_ch = it.next();
-        if preface == Some('%') &&
-            n_ch != Some('%') {
+        if preface == Some('%') && n_ch != Some('%') {
             match n_ch {
                 Some(x) => {
                     it.put_back(x);
@@ -292,8 +298,7 @@ impl SubParser {
         // check for illegal combinations here when possible vs
         // on each application so we check less per application
         // to do: move these checks to Sub::new
-        if (field_char == 's' &&
-            self.min_width_tmp == Some(String::from("0"))) ||
+        if (field_char == 's' && self.min_width_tmp == Some(String::from("0"))) ||
            (field_char == 'c' &&
             (self.min_width_tmp == Some(String::from("0")) || self.past_decimal)) ||
            (field_char == 'b' &&
@@ -322,7 +327,7 @@ impl token::Token for Sub {
                     match pf_args_it.next() {
                         // temporary, use intf.rs instead
                         Some(x) => Some(convert_asterisk_arg_int(x)),
-                        None => Some(0)
+                        None => Some(0),
                     }
                 }
             },
@@ -338,8 +343,8 @@ impl token::Token for Sub {
                             } else {
                                 Some(result as u32)
                             }
-                        },
-                        None => Some(0)
+                        }
+                        None => Some(0),
                     }
                 }                
             },
@@ -361,32 +366,24 @@ impl token::Token for Sub {
                         match *field.field_char {
                             's' => {
                                 Some(match field.second_field {
-                                    Some(max) =>{
-                                        String::from(
-                                            &arg_string[..max as usize])
-                                    }
-                                    None => {
-                                        arg_string.clone()
-                                    }
+                                    Some(max) => String::from(&arg_string[..max as usize]),
+                                    None => arg_string.clone(),
                                 })
                             }
                             'b' => {
-                                let mut a_it=PutBackN::new(
-                                    arg_string.chars());
-                                UnescapedText::from_it_core(
-                                    &mut a_it, true);
+                                let mut a_it = PutBackN::new(arg_string.chars());
+                                UnescapedText::from_it_core(&mut a_it, true);
                                 None
                             }
                             // for 'c': get iter of string vals,
                             // get opt<char> of first val
                             // and map it to opt<String>
-                            'c' | _ => arg_string.chars().next().map(
-                                |x| x.to_string())
+                            'c' | _ => arg_string.chars().next().map(|x| x.to_string()),
+                        }
+                    }
+                    None => None,
                 }
-                    },
-                    None => None
             }
-            },
             _ => {
                 // non string/char fields are delegated to num_format
                 num_format::num_format(&field, pf_arg)
@@ -395,7 +392,8 @@ impl token::Token for Sub {
         match pre_min_width_opt {
             // if have a string, print it, ensuring minimum width is met.
             Some(pre_min_width) => {
-                print!("{}", match field.min_width {
+                print!("{}",
+                       match field.min_width {
                            Some(min_width) => {
                                let diff: isize = min_width.abs() as isize -
                                                  pre_min_width.len() as isize;
@@ -418,7 +416,7 @@ impl token::Token for Sub {
                                    pre_min_width
                                }
                            }
-                    None => { pre_min_width }
+                           None => pre_min_width,
                        });
             }
             None => {}

src/printf/tokenize/token.rs

@@ -26,7 +26,5 @@ pub trait Token {
 // a number of arguments equal to the number of argument-using tokens
 
 pub trait Tokenizer {
-    fn from_it(it: &mut PutBackN<Chars>,
-               args: &mut Peekable<Iter<String>>)
-               -> Option<Box<Token>>;
+    fn from_it(it: &mut PutBackN<Chars>, args: &mut Peekable<Iter<String>>) -> Option<Box<Token>>;
 }

src/printf/tokenize/unescaped_text.rs

@@ -20,12 +20,7 @@ impl UnescapedText {
     // take an iterator to the format string
     // consume between min and max chars
     // and return it as a base-X number
-    fn base_to_u32(
-        min_chars: u8,
-        max_chars: u8,
-        base : u32,
-        it: &mut PutBackN<Chars>
-            ) -> u32 {
+    fn base_to_u32(min_chars: u8, max_chars: u8, base: u32, it: &mut PutBackN<Chars>) -> u32 {
         let mut retval: u32 = 0;
         let mut found = 0;
         while found < max_chars {
@@ -42,10 +37,10 @@ impl UnescapedText {
                         }
                         None => {
                             it.put_back(digit);
-                            break
+                            break;
+                        }
                     }
                 }
-                },
                 None => {
                     break;
                 }
@@ -74,10 +69,7 @@ impl UnescapedText {
                               preface,
                               val,
                               leading_zeros);
-        if (val < 159 && (val != 36 &&
-                          val != 64 &&
-                          val != 96)) ||
-            (val > 55296 && val < 57343) {
+        if (val < 159 && (val != 36 && val != 64 && val != 96)) || (val > 55296 && val < 57343) {
             println!("{}", err_msg);//todo stderr
             exit(cli::EXIT_ERR);
         }
@@ -87,14 +79,10 @@ impl UnescapedText {
     // adding the unescaped bytes
     // to the passed byte_vec
     // in subs_mode change octal behavior
-    fn handle_escaped(
-        byte_vec: &mut Vec<u8>,
-        it: &mut PutBackN<Chars>,
-        subs_mode: bool
-            ) {
+    fn handle_escaped(byte_vec: &mut Vec<u8>, it: &mut PutBackN<Chars>, subs_mode: bool) {
         let ch = match it.next() {
             Some(x) => x,
-            None => '\\'
+            None => '\\',
         };
         match ch {
             '0'...'9' | 'x' => {
@@ -103,9 +91,10 @@ impl UnescapedText {
                 let mut base = 16;
                 let ignore = false;
                 match ch {
-                    'x'=>{ },
+                    'x' => {}
                     e @ '0'...'9' => {
-                        max_len=3; base =8;
+                        max_len = 3;
+                        base = 8;
                         // in practice, gnu coreutils printf
                         // interprets octals without a
                         // leading zero in %b
@@ -116,23 +105,21 @@ impl UnescapedText {
                         // we'd set this to true.
                         // if subs_mode && e != '0'
                         //  { ignore = true; }
-                        if ! subs_mode || e != '0'
-                        { it.put_back(ch); }
+                        if !subs_mode || e != '0' {
+                            it.put_back(ch);
+                        }
                     }
                     _ => {}
                 }
                 if !ignore {
-                    let val = (UnescapedText::base_to_u32(min_len,
-                                                   max_len,
-                                                   base,
-                                                   it) % 256) as u8;
+                    let val = (UnescapedText::base_to_u32(min_len, max_len, base, it) % 256) as u8;
                     byte_vec.push(val);
                     let bvec = [val];
                     cli::flush_bytes(&bvec);
                 } else {
                     byte_vec.push(ch as u8);
                 }
-            },
+            }
             e @ _ => {
                 // only for hex and octal
                 // is byte encoding specified.
@@ -156,21 +143,20 @@ impl UnescapedText {
                     'f' => '\x0C',
                     // escape character
                     'e' => '\x1B',
-                    'c' => { exit(cli::EXIT_OK) },
+                    'c' => exit(cli::EXIT_OK),
                     'u' | 'U' => {
                         let len = match e {
                             'u' => 4,
-                            'U' | _ => 8
+                            'U' | _ => 8,
                         };
-                        let val = UnescapedText::base_to_u32(len,
-                                                             len,
-                                                             16,
-                                                             it);
+                        let val = UnescapedText::base_to_u32(len, len, 16, it);
                         UnescapedText::validate_iec(val, false);
                         if let Some(c) = from_u32(val) {
                             c
-                        } else { '-' }
-                    },
+                        } else {
+                            '-'
+                        }
+                    }
                     _ => {
                         s.push('\\');
                         ch
@@ -188,15 +174,16 @@ impl UnescapedText {
     // and return a wrapper around a Vec<u8> of unescaped bytes
     // break on encounter of sub symbol ('%[^%]') unless called
     // through %b subst.
-    pub fn from_it_core(it: &mut PutBackN<Chars>,
-                    subs_mode: bool) -> Option<Box<token::Token>> {
+    pub fn from_it_core(it: &mut PutBackN<Chars>, subs_mode: bool) -> Option<Box<token::Token>> {
         let mut addchar = false;
         let mut new_text = UnescapedText::new();
         let mut tmp_str = String::new();
         {
             let mut new_vec: &mut Vec<u8> = &mut (new_text.0);
             while let Some(ch) = it.next() {
-                if ! addchar { addchar = true; }
+                if !addchar {
+                    addchar = true;
+                }
                 match ch as char {
                     x if x != '\\' && x != '%' => {
                         // lazy branch eval
@@ -217,9 +204,7 @@ impl UnescapedText {
                             new_vec.extend(tmp_str.bytes());
                             tmp_str = String::new();
                         }
-                        UnescapedText::handle_escaped(new_vec,
-                                                      it,
-                                                      subs_mode)
+                        UnescapedText::handle_escaped(new_vec, it, subs_mode)
                     }
                     x if x == '%' && !subs_mode => {
                         if let Some(follow) = it.next() {
@@ -229,11 +214,11 @@ impl UnescapedText {
                             } else {
                                 it.put_back(follow);
                                 it.put_back(ch);
-                                break
+                                break;
                             }
                         } else {
                             it.put_back(ch);
-                            break
+                            break;
                         }
                     }
                     _ => {
@@ -248,7 +233,7 @@ impl UnescapedText {
         }
         match addchar {
             true => Some(Box::new(new_text)),
-            false => None
+            false => None,
         }
     }
 }

tests/printf.rs

@@ -14,222 +14,267 @@ fn expect_stdout(input: Vec<&str>, expected: &str) {
 }
 
 #[test]
-fn basic_literal() { expect_stdout(
-    vec!("hello world"), "hello world"); }
-
-#[test]
-fn escaped_tab() { expect_stdout(
-    vec!("hello\\t world"), "hello\t world"); }
-
-#[test]
-fn escaped_newline() { expect_stdout(
-    vec!("hello\\n world"), "hello\n world"); }
-
-#[test]
-fn escaped_slash() { expect_stdout(
-    vec!("hello\\\\ world"), "hello\\ world"); }
-
-#[test]
-fn escaped_hex() { expect_stdout(
-    vec!("\\x41"), "A"); }
-
-#[test]
-fn escaped_octal() { expect_stdout(
-    vec!("\\101"), "A"); }
-
-#[test]
-fn escaped_unicode_fourdigit() { expect_stdout(
-    vec!("\\u0125"), "ĥ"); }
-
-#[test]
-fn escaped_unicode_eightdigit() { expect_stdout(
-    vec!("\\U00000125"), "ĥ"); }
-
-#[test]
-fn escaped_percent_sign() { expect_stdout(
-    vec!("hello%% world"), "hello% world"); }
-
-#[test]
-fn escaped_unrecognized() { expect_stdout(
-    vec!("c\\d"), "c\\d"); }
-
-#[test]
-fn sub_string() { expect_stdout(
-    vec!("hello %s", "world"), "hello world"); }
-
-#[test]
-fn sub_multifield() { expect_stdout(
-    vec!("%s %s", "hello", "world"), "hello world"); }
-
-#[test]
-fn sub_repeat_formatstr() { expect_stdout(
-    vec!("%s.", "hello", "world"), "hello.world."); }
-
-#[test]
-fn sub_string_ignore_escapes() { expect_stdout(
-    vec!("hello %s", "\\tworld"), "hello \\tworld"); }
-
-#[test]
-fn sub_bstring_handle_escapes() { expect_stdout(
-    vec!("hello %b", "\\tworld"), "hello \tworld"); }
-
-#[test]
-fn sub_bstring_ignore_subs() { expect_stdout(
-    vec!("hello %b", "world %% %i"), "hello world %% %i"); }
-
-#[test]
-fn sub_char() { expect_stdout(
-    vec!("the letter %c", "A"), "the letter A"); }
-
-#[test]
-fn sub_num_int() { expect_stdout(
-    vec!("twenty is %i", "20"), "twenty is 20"); }
-
-#[test]
-fn sub_num_int_minwidth() { expect_stdout(
-    vec!("twenty is %1i", "20"), "twenty is 20"); }
-
-#[test]
-fn sub_num_int_neg() { expect_stdout(
-    vec!("neg. twenty is %i", "-20"), "neg. twenty is -20"); }
-
-#[test]
-fn sub_num_int_oct_in() { expect_stdout(
-    vec!("twenty is %i", "024"), "twenty is 20"); }
-
-#[test]
-fn sub_num_int_oct_in_neg() { expect_stdout(
-    vec!("neg. twenty is %i", "-024"), "neg. twenty is -20"); }
-
-#[test]
-fn sub_num_int_hex_in() { expect_stdout(
-    vec!("twenty is %i", "0x14"), "twenty is 20"); }
-
-#[test]
-fn sub_num_int_hex_in_neg() { expect_stdout(
-    vec!("neg. twenty is %i", "-0x14"), "neg. twenty is -20"); }
-
-#[test]
-fn sub_num_int_charconst_in() { expect_stdout(
-    vec!("ninetyseven is %i", "'a"), "ninetyseven is 97"); }
-
-#[test]
-fn sub_num_uint() { expect_stdout(
-    vec!("twenty is %u", "20"), "twenty is 20"); }
-
-#[test]
-fn sub_num_octal() { expect_stdout(
-    vec!("twenty in octal is %o", "20"), "twenty in octal is 24"); }
-
-#[test]
-fn sub_num_hex_lower() { expect_stdout(
-    vec!("thirty in hex is %x", "30"), "thirty in hex is 1e"); }
-
-#[test]
-fn sub_num_hex_upper() { expect_stdout(
-    vec!("thirty in hex is %X", "30"), "thirty in hex is 1E"); }
-
-#[test]
-fn sub_num_float() { expect_stdout(
-    vec!("twenty is %f", "20"), "twenty is 20.000000"); }
-
-#[test]
-fn sub_num_float_round() { expect_stdout(
-    vec!("two is %f", "1.9999995"), "two is 2.000000"); }
-
-#[test]
-fn sub_num_sci_lower() { expect_stdout(
-    vec!("twenty is %e", "20"), "twenty is 2.000000e+01"); }
-
-#[test]
-fn sub_num_sci_upper() { expect_stdout(
-    vec!("twenty is %E", "20"), "twenty is 2.000000E+01"); }
-
-#[test]
-fn sub_num_sci_trunc() { expect_stdout(
-    vec!("pi is ~ %e", "3.1415926535"), "pi is ~ 3.141593e+00"); }
-
-#[test]
-fn sub_num_dec_trunc() { expect_stdout(
-    vec!("pi is ~ %g", "3.1415926535"), "pi is ~ 3.141593"); }
-
-#[test]
-fn sub_minwidth() { expect_stdout(
-    vec!("hello %7s", "world"), "hello   world"); }
-
-#[test]
-fn sub_minwidth_negative() { expect_stdout(
-    vec!("hello %-7s", "world"), "hello world  "); }
-
-#[test]
-fn sub_str_max_chars_input() { expect_stdout(
-    vec!("hello %7.2s", "world"), "hello      wo"); }
-
-#[test]
-fn sub_int_decimal() { expect_stdout(
-    vec!("%0.i", "11"), "11"); }
-
-#[test]
-fn sub_int_leading_zeroes() { expect_stdout(
-    vec!("%.4i", "11"), "0011"); }
-
-#[test]
-fn sub_int_leading_zeroes_prio() { expect_stdout(
-    vec!("%5.4i", "11"), " 0011"); }
-
-#[test]
-fn sub_float_dec_places() { expect_stdout(
-    vec!("pi is ~ %.11f", "3.1415926535"), "pi is ~ 3.14159265350"); }
-
-#[test]
-fn sub_float_hex_in() { expect_stdout(
-    vec!("%f", "0xF1.1F"), "241.121094"); }
-
-#[test]
-fn sub_float_no_octal_in() { expect_stdout(
-    vec!("%f", "077"), "77.000000"); }
-
-#[test]
-fn sub_any_asterisk_firstparam() { expect_stdout(
-    vec!("%*i", "3", "11", "4", "12"), " 11  12");
+fn basic_literal() {
+    expect_stdout(vec!["hello world"], "hello world");
 }
 
 #[test]
-fn sub_any_asterisk_second_param() { expect_stdout(
-    vec!("%.*i", "3", "11", "4", "12"), "0110012");
+fn escaped_tab() {
+    expect_stdout(vec!["hello\\t world"], "hello\t world");
 }
 
 #[test]
-fn sub_any_asterisk_both_params() { expect_stdout(
-    vec!("%*.*i", "4", "3", "11", "5", "4", "12"), " 011 0012");
+fn escaped_newline() {
+    expect_stdout(vec!["hello\\n world"], "hello\n world");
 }
 
 #[test]
-fn sub_any_asterisk_octal_arg() { expect_stdout(
-    vec!("%.*i", "011", "12345678"), "012345678");
+fn escaped_slash() {
+    expect_stdout(vec!["hello\\\\ world"], "hello\\ world");
 }
 
 #[test]
-fn sub_any_asterisk_hex_arg() { expect_stdout(
-    vec!("%.*i", "0xA", "123456789"), "0123456789");
+fn escaped_hex() {
+    expect_stdout(vec!["\\x41"], "A");
 }
 
 #[test]
-fn sub_any_specifiers_no_params() { expect_stdout(
-    vec!("%ztlhLji", "3"), "3");
+fn escaped_octal() {
+    expect_stdout(vec!["\\101"], "A");
 }
 
 #[test]
-fn sub_any_specifiers_after_first_param() { expect_stdout(
-    vec!("%0ztlhLji", "3"), "3");
+fn escaped_unicode_fourdigit() {
+    expect_stdout(vec!["\\u0125"], "ĥ");
 }
 
 #[test]
-fn sub_any_specifiers_after_period() { expect_stdout(
-    vec!("%0.ztlhLji", "3"), "3");
+fn escaped_unicode_eightdigit() {
+    expect_stdout(vec!["\\U00000125"], "ĥ");
 }
 
 #[test]
-fn sub_any_specifiers_after_second_param() { expect_stdout(
-    vec!("%0.0ztlhLji", "3"), "3");
+fn escaped_percent_sign() {
+    expect_stdout(vec!["hello%% world"], "hello% world");
+}
+
+#[test]
+fn escaped_unrecognized() {
+    expect_stdout(vec!["c\\d"], "c\\d");
+}
+
+#[test]
+fn sub_string() {
+    expect_stdout(vec!["hello %s", "world"], "hello world");
+}
+
+#[test]
+fn sub_multifield() {
+    expect_stdout(vec!["%s %s", "hello", "world"], "hello world");
+}
+
+#[test]
+fn sub_repeat_formatstr() {
+    expect_stdout(vec!["%s.", "hello", "world"], "hello.world.");
+}
+
+#[test]
+fn sub_string_ignore_escapes() {
+    expect_stdout(vec!["hello %s", "\\tworld"], "hello \\tworld");
+}
+
+#[test]
+fn sub_bstring_handle_escapes() {
+    expect_stdout(vec!["hello %b", "\\tworld"], "hello \tworld");
+}
+
+#[test]
+fn sub_bstring_ignore_subs() {
+    expect_stdout(vec!["hello %b", "world %% %i"], "hello world %% %i");
+}
+
+#[test]
+fn sub_char() {
+    expect_stdout(vec!["the letter %c", "A"], "the letter A");
+}
+
+#[test]
+fn sub_num_int() {
+    expect_stdout(vec!["twenty is %i", "20"], "twenty is 20");
+}
+
+#[test]
+fn sub_num_int_minwidth() {
+    expect_stdout(vec!["twenty is %1i", "20"], "twenty is 20");
+}
+
+#[test]
+fn sub_num_int_neg() {
+    expect_stdout(vec!["neg. twenty is %i", "-20"], "neg. twenty is -20");
+}
+
+#[test]
+fn sub_num_int_oct_in() {
+    expect_stdout(vec!["twenty is %i", "024"], "twenty is 20");
+}
+
+#[test]
+fn sub_num_int_oct_in_neg() {
+    expect_stdout(vec!["neg. twenty is %i", "-024"], "neg. twenty is -20");
+}
+
+#[test]
+fn sub_num_int_hex_in() {
+    expect_stdout(vec!["twenty is %i", "0x14"], "twenty is 20");
+}
+
+#[test]
+fn sub_num_int_hex_in_neg() {
+    expect_stdout(vec!["neg. twenty is %i", "-0x14"], "neg. twenty is -20");
+}
+
+#[test]
+fn sub_num_int_charconst_in() {
+    expect_stdout(vec!["ninetyseven is %i", "'a"], "ninetyseven is 97");
+}
+
+#[test]
+fn sub_num_uint() {
+    expect_stdout(vec!["twenty is %u", "20"], "twenty is 20");
+}
+
+#[test]
+fn sub_num_octal() {
+    expect_stdout(vec!["twenty in octal is %o", "20"], "twenty in octal is 24");
+}
+
+#[test]
+fn sub_num_hex_lower() {
+    expect_stdout(vec!["thirty in hex is %x", "30"], "thirty in hex is 1e");
+}
+
+#[test]
+fn sub_num_hex_upper() {
+    expect_stdout(vec!["thirty in hex is %X", "30"], "thirty in hex is 1E");
+}
+
+#[test]
+fn sub_num_float() {
+    expect_stdout(vec!["twenty is %f", "20"], "twenty is 20.000000");
+}
+
+#[test]
+fn sub_num_float_round() {
+    expect_stdout(vec!["two is %f", "1.9999995"], "two is 2.000000");
+}
+
+#[test]
+fn sub_num_sci_lower() {
+    expect_stdout(vec!["twenty is %e", "20"], "twenty is 2.000000e+01");
+}
+
+#[test]
+fn sub_num_sci_upper() {
+    expect_stdout(vec!["twenty is %E", "20"], "twenty is 2.000000E+01");
+}
+
+#[test]
+fn sub_num_sci_trunc() {
+    expect_stdout(vec!["pi is ~ %e", "3.1415926535"], "pi is ~ 3.141593e+00");
+}
+
+#[test]
+fn sub_num_dec_trunc() {
+    expect_stdout(vec!["pi is ~ %g", "3.1415926535"], "pi is ~ 3.141593");
+}
+
+#[test]
+fn sub_minwidth() {
+    expect_stdout(vec!["hello %7s", "world"], "hello   world");
+}
+
+#[test]
+fn sub_minwidth_negative() {
+    expect_stdout(vec!["hello %-7s", "world"], "hello world  ");
+}
+
+#[test]
+fn sub_str_max_chars_input() {
+    expect_stdout(vec!["hello %7.2s", "world"], "hello      wo");
+}
+
+#[test]
+fn sub_int_decimal() {
+    expect_stdout(vec!["%0.i", "11"], "11");
+}
+
+#[test]
+fn sub_int_leading_zeroes() {
+    expect_stdout(vec!["%.4i", "11"], "0011");
+}
+
+#[test]
+fn sub_int_leading_zeroes_prio() {
+    expect_stdout(vec!["%5.4i", "11"], " 0011");
+}
+
+#[test]
+fn sub_float_dec_places() {
+    expect_stdout(vec!["pi is ~ %.11f", "3.1415926535"],
+                  "pi is ~ 3.14159265350");
+}
+
+#[test]
+fn sub_float_hex_in() {
+    expect_stdout(vec!["%f", "0xF1.1F"], "241.121094");
+}
+
+#[test]
+fn sub_float_no_octal_in() {
+    expect_stdout(vec!["%f", "077"], "77.000000");
+}
+
+#[test]
+fn sub_any_asterisk_firstparam() {
+    expect_stdout(vec!["%*i", "3", "11", "4", "12"], " 11  12");
+}
+
+#[test]
+fn sub_any_asterisk_second_param() {
+    expect_stdout(vec!["%.*i", "3", "11", "4", "12"], "0110012");
+}
+
+#[test]
+fn sub_any_asterisk_both_params() {
+    expect_stdout(vec!["%*.*i", "4", "3", "11", "5", "4", "12"], " 011 0012");
+}
+
+#[test]
+fn sub_any_asterisk_octal_arg() {
+    expect_stdout(vec!["%.*i", "011", "12345678"], "012345678");
+}
+
+#[test]
+fn sub_any_asterisk_hex_arg() {
+    expect_stdout(vec!["%.*i", "0xA", "123456789"], "0123456789");
+}
+
+#[test]
+fn sub_any_specifiers_no_params() {
+    expect_stdout(vec!["%ztlhLji", "3"], "3");
+}
+
+#[test]
+fn sub_any_specifiers_after_first_param() {
+    expect_stdout(vec!["%0ztlhLji", "3"], "3");
+}
+
+#[test]
+fn sub_any_specifiers_after_period() {
+    expect_stdout(vec!["%0.ztlhLji", "3"], "3");
+}
+
+#[test]
+fn sub_any_specifiers_after_second_param() {
+    expect_stdout(vec!["%0.0ztlhLji", "3"], "3");
 }