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format: %c prints the first character of a string

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This commit is contained in:
Samuel Tardieu 2024-01-04 19:33:47 +01:00
parent 7dc4afb5cc
commit 5dfeca9ff2
2 changed files with 9 additions and 8 deletions
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9
src/uucore/src/lib/features/format/argument.rs
View file

@ -41,14 +41,7 @@ impl<'a, T: Iterator<Item = &'a FormatArgument>> ArgumentIter<'a> for T {
match next {
FormatArgument::Char(c) => *c,
FormatArgument::Unparsed(s) => {
let mut chars = s.chars();
let Some(c) = chars.next() else {
return '\0';
};
let None = chars.next() else {
return '\0';
};
c
s.chars().next().unwrap_or('\0')
}
_ => '\0',
}

8
tests/by-util/test_printf.rs
View file

@ -162,6 +162,14 @@ fn sub_char() {
.stdout_only("the letter A");
}
#[test]
fn sub_char_from_string() {
new_ucmd!()
.args(&["%c%c%c", "five", "%", "oval"])
.succeeds()
.stdout_only("f%o");
}
#[test]
fn sub_num_int() {
new_ucmd!()