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minor: Add more proc-macro tests for parsing negative literals

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This commit is contained in:
Lukas Wirth 2025-05-05 13:39:38 +02:00
parent 9d1364b730
commit cb18ead726
4 changed files with 341 additions and 26 deletions
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52
crates/tt/src/lib.rs
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@ -817,6 +817,58 @@ impl<S> fmt::Display for Ident<S> {
}
}
impl<S> Literal<S> {
pub fn display_no_minus(&self) -> impl fmt::Display {
struct NoMinus<'a, S>(&'a Literal<S>);
impl<S> fmt::Display for NoMinus<'_, S> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let symbol =
self.0.symbol.as_str().strip_prefix('-').unwrap_or(self.0.symbol.as_str());
match self.0.kind {
LitKind::Byte => write!(f, "b'{}'", symbol),
LitKind::Char => write!(f, "'{}'", symbol),
LitKind::Integer | LitKind::Float | LitKind::Err(_) => write!(f, "{}", symbol),
LitKind::Str => write!(f, "\"{}\"", symbol),
LitKind::ByteStr => write!(f, "b\"{}\"", symbol),
LitKind::CStr => write!(f, "c\"{}\"", symbol),
LitKind::StrRaw(num_of_hashes) => {
let num_of_hashes = num_of_hashes as usize;
write!(
f,
r#"r{0:#<num_of_hashes$}"{text}"{0:#<num_of_hashes$}"#,
"",
text = symbol
)
}
LitKind::ByteStrRaw(num_of_hashes) => {
let num_of_hashes = num_of_hashes as usize;
write!(
f,
r#"br{0:#<num_of_hashes$}"{text}"{0:#<num_of_hashes$}"#,
"",
text = symbol
)
}
LitKind::CStrRaw(num_of_hashes) => {
let num_of_hashes = num_of_hashes as usize;
write!(
f,
r#"cr{0:#<num_of_hashes$}"{text}"{0:#<num_of_hashes$}"#,
"",
text = symbol
)
}
}?;
if let Some(suffix) = &self.0.suffix {
write!(f, "{suffix}")?;
}
Ok(())
}
}
NoMinus(self)
}
}
impl<S> fmt::Display for Literal<S> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self.kind {