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Fix test and add more comment

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This commit is contained in:
Edwin Cheng 2020-03-07 13:02:54 +08:00
parent 36c7684687
commit 2e178b5475
1 changed files with 4 additions and 1 deletions
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5
crates/ra_hir_expand/src/builtin_macro.rs
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@ -142,6 +142,9 @@ fn env_expand(
_tt: &tt::Subtree, _tt: &tt::Subtree,
) -> Result<tt::Subtree, mbe::ExpandError> { ) -> Result<tt::Subtree, mbe::ExpandError> {
// dummy implementation for type-checking purposes // dummy implementation for type-checking purposes
// we cannot use an empty string here, because for
// `include!(concat!(env!("OUT_DIR"), "/foo.rs"))` will become
// `include!("foo.rs"), which maybe infinite loop
let expanded = quote! { "__RA_UNIMPLEMENTATED__" }; let expanded = quote! { "__RA_UNIMPLEMENTATED__" };
Ok(expanded) Ok(expanded)
@ -394,7 +397,7 @@ mod tests {
"#, "#,
); );
assert_eq!(expanded, "\"\""); assert_eq!(expanded, "\"__RA_UNIMPLEMENTATED__\"");
} }
#[test] #[test]