bjoernager/rust
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Expect extern fn with no body when parsing

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Also add a test case for inserting a semicolon on extern fns.

Without this fix, we got an error like this:

    error: expected one of `->`, `where`, or `{`, found `}`
     --> chk.rs:3:1
      |
    2 |   fn foo()
      |      ---  - expected one of `->`, `where`, or `{`
      |      |
      |      while parsing this `fn`
    3 | }
      | ^ unexpected token

Since this is inside an extern block, you're required to write function
prototypes with no body. This fixes a regression, and adds a test case
for it.
This commit is contained in:
Michael Howell 2021-12-06 11:07:34 -07:00
parent 61995926d2
commit 6611567f9e
4 changed files with 29 additions and 1 deletions
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2
compiler/rustc_parse/src/parser/item.rs
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@ -950,7 +950,7 @@ impl<'a> Parser<'a> {
&mut self,
force_collect: ForceCollect,
) -> PResult<'a, Option<Option<P<ForeignItem>>>> {
let fn_parse_mode = FnParseMode { req_name: |_| true, req_body: true };
let fn_parse_mode = FnParseMode { req_name: |_| true, req_body: false };
Ok(self.parse_item_(fn_parse_mode, force_collect)?.map(
|Item { attrs, id, span, vis, ident, kind, tokens }| {
let kind = match ForeignItemKind::try_from(kind) {