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Unquote strings and handle boolean literals in concat!

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This commit is contained in:
Laurențiu Nicola 2021-01-25 12:53:44 +02:00
parent 1cd5a6cd41
commit ee8c678870
1 changed files with 8 additions and 16 deletions
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24
crates/hir_expand/src/builtin_macro.rs
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@ -327,17 +327,12 @@ fn concat_expand(
// concat works with string and char literals, so remove any quotes.
// It also works with integer, float and boolean literals, so just use the rest
// as-is.
text += it
.text
.trim_start_matches(|c| match c {
'r' | '#' | '\'' | '"' => true,
_ => false,
})
.trim_end_matches(|c| match c {
'#' | '\'' | '"' => true,
_ => false,
});
let component = unquote_str(&it).unwrap_or_else(|| it.text.to_string());
text.push_str(&component);
}
// handle boolean literals
tt::TokenTree::Leaf(tt::Leaf::Ident(id)) if i % 2 == 0 => {
text.push_str(id.text.as_str());
}
tt::TokenTree::Leaf(tt::Leaf::Punct(punct)) if i % 2 == 1 && punct.char == ',' => (),
_ => {
@ -345,7 +340,6 @@ fn concat_expand(
}
}
}
ExpandResult { value: Some((quote!(#text), FragmentKind::Expr)), err }
}
@ -745,12 +739,10 @@ mod tests {
r##"
#[rustc_builtin_macro]
macro_rules! concat {}
concat!("foo", 0, r#"bar"#);
concat!("foo", r, 0, r#"bar"#, false);
"##,
);
assert_eq!(expanded, r#""foo0bar""#);
// FIXME: `true`/`false` literals don't work.
assert_eq!(expanded, r#""foor0barfalse""#);
}
}