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parameters.split_last()

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Jeroen Vannevel 2022-02-21 10:29:38 +00:00
parent d1fc208c9c
commit 9c6542f209
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1 changed files with 16 additions and 17 deletions
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33
crates/hir_ty/src/display.rs
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@ -1097,29 +1097,28 @@ impl HirDisplay for TypeRef {
TypeRef::Fn(parameters, is_varargs) => {
// FIXME: Function pointer qualifiers.
write!(f, "fn(")?;
for index in 0..parameters.len() - 1 {
let (param_name, param_type) = &parameters[index];
if let Some(name) = param_name {
write!(f, "{}: ", name)?;
}
if let Some(((_, return_type), function_parameters)) = parameters.split_last() {
for index in 0..function_parameters.len() {
let (param_name, param_type) = &function_parameters[index];
if let Some(name) = param_name {
write!(f, "{}: ", name)?;
}
param_type.hir_fmt(f)?;
param_type.hir_fmt(f)?;
// Last index contains the return type so we stop writing commas on the second-to-last index
if index != parameters.len() - 2 {
write!(f, ", ")?;
if index != function_parameters.len() - 1 {
write!(f, ", ")?;
}
}
}
if *is_varargs {
write!(f, "{}...", if parameters.len() == 1 { "" } else { ", " })?;
}
write!(f, ")")?;
if let Some((_, ret_ty)) = &parameters.last() {
match ret_ty {
if *is_varargs {
write!(f, "{}...", if parameters.len() == 1 { "" } else { ", " })?;
}
write!(f, ")")?;
match &return_type {
TypeRef::Tuple(tup) if tup.is_empty() => {}
_ => {
write!(f, " -> ")?;
ret_ty.hir_fmt(f)?;
return_type.hir_fmt(f)?;
}
}
}