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| author | Steve Klabnik <steve@steveklabnik.com> | 2015-11-05 15:30:32 +0100 |
|---|---|---|
| committer | Steve Klabnik <steve@steveklabnik.com> | 2015-11-05 15:30:34 +0100 |
| commit | 63576c23e41092ae16c57e15977bf10e72327799 (patch) | |
| tree | 2fb9960c65b2d703592121d069b8bb3fcc2fbb9a /src/libsyntax/ext | |
| parent | a216e847272ddbd3033037b606eaf2d801c250b9 (diff) | |
| download | rust-63576c23e41092ae16c57e15977bf10e72327799.tar.gz rust-63576c23e41092ae16c57e15977bf10e72327799.zip | |
remove excess string allocation
&format!("...") is the same as "" if we're not doing any interpolation,
and doesn't allocate an intermediate String.
Diffstat (limited to 'src/libsyntax/ext')
| -rw-r--r-- | src/libsyntax/ext/expand.rs | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/src/libsyntax/ext/expand.rs b/src/libsyntax/ext/expand.rs index b1b4605d5ec..512f71fd4c1 100644 --- a/src/libsyntax/ext/expand.rs +++ b/src/libsyntax/ext/expand.rs @@ -400,9 +400,7 @@ pub fn expand_item_mac(it: P<ast::Item>, } MacroRulesTT => { if ident.name == parse::token::special_idents::invalid.name { - fld.cx.span_err(path_span, - &format!("macro_rules! expects an ident argument") - ); + fld.cx.span_err(path_span, "macro_rules! expects an ident argument"); return SmallVector::zero(); } |