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uucore(memo): refactor error propogation with new SubError enum

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This commit is contained in:
ndd7xv 2022-02-13 17:28:33 -05:00
parent 1e12c46c24
commit f04f22b012
1 changed files with 33 additions and 43 deletions
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76
src/uucore/src/lib/features/tokenize/sub.rs
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@ -5,8 +5,10 @@
//! it is created by Sub's implementation of the Tokenizer trait
//! Subs which have numeric field chars make use of the num_format
//! submodule
use crate::error::{UResult, UUsageError};
use crate::error::{UError, UResult};
use itertools::{put_back_n, PutBackN};
use std::error::Error;
use std::fmt::Display;
use std::iter::Peekable;
use std::process::exit;
use std::slice::Iter;
@ -20,6 +22,23 @@ use super::unescaped_text::UnescapedText;
const EXIT_ERR: i32 = 1;
#[derive(Debug)]
pub enum SubError {
InvalidSpec(String),
}
impl Display for SubError {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
match self {
Self::InvalidSpec(s) => write!(f, "%{}: invalid conversion specification", s),
}
}
}
impl Error for SubError {}
impl UError for SubError {}
fn convert_asterisk_arg_int(asterisk_arg: &str) -> isize {
// this is a costly way to parse the
// args used for asterisk values into integers
@ -172,10 +191,7 @@ impl SubParser {
'-' | '*' | '0'..='9' => {
if !self.past_decimal {
if self.min_width_is_asterisk || self.specifiers_found {
return Err(UUsageError::new(
1,
format!("%{}: invalid conversion specification", &self.text_so_far),
));
return Err(SubError::InvalidSpec(self.text_so_far.clone()).into());
}
if self.min_width_tmp.is_none() {
self.min_width_tmp = Some(String::new());
@ -183,13 +199,9 @@ impl SubParser {
match self.min_width_tmp.as_mut() {
Some(x) => {
if (ch == '-' || ch == '*') && !x.is_empty() {
return Err(UUsageError::new(
1,
format!(
"%{}: invalid conversion specification",
&self.text_so_far
),
));
return Err(
SubError::InvalidSpec(self.text_so_far.clone()).into()
);
}
if ch == '*' {
self.min_width_is_asterisk = true;
@ -204,10 +216,7 @@ impl SubParser {
// second field should never have a
// negative value
if self.second_field_is_asterisk || ch == '-' || self.specifiers_found {
return Err(UUsageError::new(
1,
format!("%{}: invalid conversion specification", &self.text_so_far),
));
return Err(SubError::InvalidSpec(self.text_so_far.clone()).into());
}
if self.second_field_tmp.is_none() {
self.second_field_tmp = Some(String::new());
@ -215,13 +224,9 @@ impl SubParser {
match self.second_field_tmp.as_mut() {
Some(x) => {
if ch == '*' && !x.is_empty() {
return Err(UUsageError::new(
1,
format!(
"%{}: invalid conversion specification",
&self.text_so_far
),
));
return Err(
SubError::InvalidSpec(self.text_so_far.clone()).into()
);
}
if ch == '*' {
self.second_field_is_asterisk = true;
@ -238,10 +243,7 @@ impl SubParser {
if !self.past_decimal {
self.past_decimal = true;
} else {
return Err(UUsageError::new(
1,
format!("%{}: invalid conversion specification", &self.text_so_far),
));
return Err(SubError::InvalidSpec(self.text_so_far.clone()).into());
}
}
x if legal_fields.binary_search(&x).is_ok() => {
@ -258,18 +260,12 @@ impl SubParser {
}
}
_ => {
return Err(UUsageError::new(
1,
format!("%{}: invalid conversion specification", &self.text_so_far),
));
return Err(SubError::InvalidSpec(self.text_so_far.clone()).into());
}
}
}
if self.field_char.is_none() {
return Err(UUsageError::new(
1,
format!("%{}: invalid conversion specification", &self.text_so_far),
));
return Err(SubError::InvalidSpec(self.text_so_far.clone()).into());
}
let field_char_retrieved = self.field_char.unwrap();
if self.past_decimal && self.second_field_tmp.is_none() {
@ -303,10 +299,7 @@ impl SubParser {
}
None => {
text_so_far.push('%');
return Err(UUsageError::new(
1,
format!("%{}: invalid conversion specification", &text_so_far[..]),
));
Err(SubError::InvalidSpec(text_so_far.clone()).into())
}
}
} else {
@ -334,10 +327,7 @@ impl SubParser {
// invalid string substitution
// to do: include information about an invalid
// string substitution
return Err(UUsageError::new(
1,
format!("%{}: invalid conversion specification", &self.text_so_far),
));
return Err(SubError::InvalidSpec(self.text_so_far.clone()).into());
}
Ok(())
}