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Rewrite and refactor format_args!() builtin macro. #100996

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merged 14 commits into from
Sep 28, 2022
Merged

Rewrite and refactor format_args!() builtin macro. #100996

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9bec0de
Rewrite and refactor format_args!() builtin macro.
m-ou-se Aug 8, 2022
3ffcb65
Update tests.
m-ou-se Aug 26, 2022
8efc383
Move FormatArgs structure to its own module.
m-ou-se Aug 26, 2022
0007492
Fix typo.
m-ou-se Aug 26, 2022
ae238ef
Prefer new_v1_formatted instead of new_v1 with duplicates.
m-ou-se Aug 27, 2022
e65c96e
Tweak comments.
m-ou-se Aug 27, 2022
df7fd11
Use if let chain.
m-ou-se Aug 30, 2022
15754f5
Move enum definition closer to its usage.
m-ou-se Aug 30, 2022
8d9a588
Flatten if-let and match into one.
m-ou-se Aug 30, 2022
c1c6e3a
Add clarifying comments.
m-ou-se Aug 30, 2022
1406563
Update test.
m-ou-se Sep 6, 2022
cf53fef
Turn format arguments Vec into its own struct.
m-ou-se Sep 6, 2022
ba7bf1d
Update doc comments.
m-ou-se Sep 6, 2022
20bb600
Remove confusing drop.
m-ou-se Sep 6, 2022
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Add clarifying comments.
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@m-ou-se
m-ou-se committed Sep 27, 2022
commit c1c6e3ae7c6c1d268b1d0f608e58d74f863d572b
3 changes: 3 additions & 0 deletions compiler/rustc_builtin_macros/src/format.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -308,12 +308,15 @@ pub fn make_format_args(
.iter()
.position(|arg| arg.1.ident().is_some_and(|id| id.name == name))
{
// Name found in `args`, so we resolve it to its index in that Vec.
let index = start_of_named_args + i;
if !matches!(args[index].1, FormatArgKind::Captured(_)) {
// Mark it as used, if it was an explicit argument.
used[index] = true;
}
Ok(index)
} else {
// Name not found in `args`, so we add it as an implicitly captured argument.
let span = span.unwrap_or(fmt_span);
let ident = Ident::new(name, span);
let arg = if is_literal {
Expand Down