bd4c9676c7
When a macro is used in the trailing expression position of a block
(e.g. `fn foo() { my_macro!() }`), we currently parse it as an
expression, rather than a statement. As a result, we ended up
using the `NodeId` of the containing statement as our `lint_node_id`,
even though we don't normally do this for macro calls.
If such a macro expands to an expression with a `#[cfg]` attribute,
then the trailing statement can get removed entirely. This lead to
an ICE, since we were usng the `NodeId` of the expression to emit
a lint.
Ths commit makes us skip updating `lint_node_id` when handling
a macro in trailing expression position. This will cause us to
lint at the closest parent of the macro call.
17 lines
332 B
Rust
17 lines
332 B
Rust
// check-pass
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//
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// Ensures that we properly lint
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// a removed 'expression' resulting from a macro
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// in trailing expression position
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macro_rules! expand_it {
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() => {
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#[cfg(FALSE)] 25; //~ WARN trailing semicolon in macro
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//~| WARN this was previously
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}
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}
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fn main() {
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expand_it!()
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}
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