[mlir] Fix -Wunused-variable warning in AsmParserState.cpp (NFC)

DamonFool · DamonFool · commit 604aba0c8b79 · 2023-08-25T10:13:48.000+08:00
/data/llvm-project/mlir/lib/AsmParser/AsmParserState.cpp:293:8: error: unused variable '[it, inserted]' [-Werror,-Wunused-variable]
  auto [it, inserted] =
       ^
1 error generated.
diff --git a/mlir/lib/AsmParser/AsmParserState.cpp b/mlir/lib/AsmParser/AsmParserState.cpp
@@ -290,7 +290,7 @@ void AsmParserState::addAttrAliasDefinition(StringRef name, SMRange location) {
 }
 
 void AsmParserState::addTypeAliasDefinition(StringRef name, SMRange location) {
-  auto [it, inserted] =
+  [[maybe_unused]] auto [it, inserted] =
       impl->typeAliasToIdx.try_emplace(name, impl->typeAliases.size());
   assert(inserted && "unexpected attribute alias redefinition");
   impl->typeAliases.push_back(

Original file line number	Diff line number	Diff line change
`@@ -290,7 +290,7 @@ void AsmParserState::addAttrAliasDefinition(StringRef name, SMRange location) {`
`290`	`290`	`}`
`291`	`291`
`292`	`292`	`void AsmParserState::addTypeAliasDefinition(StringRef name, SMRange location) {`
`293`		`- auto [it, inserted] =`
	`293`	`+ [[maybe_unused]] auto [it, inserted] =`
`294`	`294`	`impl->typeAliasToIdx.try_emplace(name, impl->typeAliases.size());`
`295`	`295`	`assert(inserted && "unexpected attribute alias redefinition");`
`296`	`296`	`impl->typeAliases.push_back(`