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Auto merge of #116069 - compiler-errors:debug-tuple, r=Nilstrieb

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Fix debug printing of tuple

Self-explanatory. Didn't create a UI test, but I guess I could -- not sure where debug output shows up in rustc_attrs to make a sufficient test, tho.
This commit is contained in:
bors 2023-09-24 15:16:18 +00:00
commit 26eeea6a1b
1 changed files with 10 additions and 14 deletions
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24
compiler/rustc_type_ir/src/sty.rs
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@ -531,22 +531,18 @@ fn fmt<InfCtx: InferCtxtLike<I>>(
}
Never => write!(f, "!"),
Tuple(t) => {
let mut iter = t.clone().into_iter();
write!(f, "(")?;
match iter.next() {
None => return write!(f, ")"),
Some(ty) => write!(f, "{:?}", &this.wrap(ty))?,
};
match iter.next() {
None => return write!(f, ",)"),
Some(ty) => write!(f, "{:?})", &this.wrap(ty))?,
let mut count = 0;
for ty in t.clone() {
if count > 0 {
write!(f, ", ")?;
}
write!(f, "{:?}", &this.wrap(ty))?;
count += 1;
}
for ty in iter {
write!(f, ", {:?}", &this.wrap(ty))?;
// unary tuples need a trailing comma
if count == 1 {
write!(f, ",")?;
}
write!(f, ")")
}