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Merge #7422

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7422: Disallow non-boolean literals in concat! r=lnicola a=lnicola



Co-authored-by: Laurențiu Nicola <lnicola@dend.ro>
This commit is contained in:
bors[bot] 2021-01-25 11:35:37 +00:00 committed by GitHub
commit a6a5b02f4c
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1 changed files with 4 additions and 2 deletions
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6
crates/hir_expand/src/builtin_macro.rs
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@ -331,7 +331,9 @@ fn concat_expand(
text.push_str(&component);
}
// handle boolean literals
tt::TokenTree::Leaf(tt::Leaf::Ident(id)) if i % 2 == 0 => {
tt::TokenTree::Leaf(tt::Leaf::Ident(id))
if i % 2 == 0 && (id.text == "true" || id.text == "false") =>
{
text.push_str(id.text.as_str());
}
tt::TokenTree::Leaf(tt::Leaf::Punct(punct)) if i % 2 == 1 && punct.char == ',' => (),
@ -739,7 +741,7 @@ mod tests {
r##"
#[rustc_builtin_macro]
macro_rules! concat {}
concat!("foo", r, 0, r#"bar"#, false);
concat!("foo", "r", 0, r#"bar"#, false);
"##,
);