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Fix unwrap on None in expanding format args

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This commit is contained in:
hkalbasi 2023-06-08 00:17:22 +03:30
parent dcab226210
commit 30e16e20d0
2 changed files with 41 additions and 4 deletions
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7
crates/hir-expand/src/builtin_fn_macro.rs
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@ -262,9 +262,6 @@ fn format_args_expand_general(
let expand_error =
ExpandResult::new(tt::Subtree::empty(), mbe::ExpandError::NoMatchingRule.into());
if args.is_empty() {
return expand_error;
}
let mut key_args = FxHashMap::default();
let mut args = args.into_iter().filter_map(|mut arg| {
// Remove `key =`.
@ -281,7 +278,9 @@ fn format_args_expand_general(
Some(arg)
}).collect::<Vec<_>>().into_iter();
// ^^^^^^^ we need this collect, to enforce the side effect of the filter_map closure (building the `key_args`)
let format_subtree = args.next().unwrap();
let Some(format_subtree) = args.next() else {
return expand_error;
};
let format_string = (|| {
let token_tree = format_subtree.token_trees.get(0)?;
match token_tree {