[flang] Minor cleanup (move function into /tools.cpp) (#111587)

The semantics utility GetAllNames has declarations in two header files
and a definition that really should be in the common utilities source
file. Remove the redudant declaration from resolve-names-utils.h and
move code from resolve-names-utils.cpp into Semantics/tools.cpp.

Author: klausler

flang/lib/Semantics/resolve-names-utils.cpp

@@ -31,8 +31,6 @@ using common::NumericOperator;
 using common::RelationalOperator;
 using IntrinsicOperator = parser::DefinedOperator::IntrinsicOperator;
 
-static constexpr const char *operatorPrefix{"operator("};
-
 static GenericKind MapIntrinsicOperator(IntrinsicOperator);
 
 Symbol *Resolve(const parser::Name &name, Symbol *symbol) {
@@ -69,37 +67,6 @@ bool IsIntrinsicOperator(
   return false;
 }
 
-template <typename E>
-std::forward_list<std::string> GetOperatorNames(
-    const SemanticsContext &context, E opr) {
-  std::forward_list<std::string> result;
-  for (const char *name : context.languageFeatures().GetNames(opr)) {
-    result.emplace_front(std::string{operatorPrefix} + name + ')');
-  }
-  return result;
-}
-
-std::forward_list<std::string> GetAllNames(
-    const SemanticsContext &context, const SourceName &name) {
-  std::string str{name.ToString()};
-  if (!name.empty() && name.end()[-1] == ')' &&
-      name.ToString().rfind(std::string{operatorPrefix}, 0) == 0) {
-    for (int i{0}; i != common::LogicalOperator_enumSize; ++i) {
-      auto names{GetOperatorNames(context, LogicalOperator{i})};
-      if (llvm::is_contained(names, str)) {
-        return names;
-      }
-    }
-    for (int i{0}; i != common::RelationalOperator_enumSize; ++i) {
-      auto names{GetOperatorNames(context, RelationalOperator{i})};
-      if (llvm::is_contained(names, str)) {
-        return names;
-      }
-    }
-  }
-  return {str};
-}
-
 bool IsLogicalConstant(
     const SemanticsContext &context, const SourceName &name) {
   std::string str{name.ToString()};

flang/lib/Semantics/resolve-names-utils.h

@@ -51,11 +51,6 @@ parser::MessageFixedText WithSeverity(
 bool IsIntrinsicOperator(const SemanticsContext &, const SourceName &);
 bool IsLogicalConstant(const SemanticsContext &, const SourceName &);
 
-// Some intrinsic operators have more than one name (e.g. `operator(.eq.)` and
-// `operator(==)`). GetAllNames() returns them all, including symbolName.
-std::forward_list<std::string> GetAllNames(
-    const SemanticsContext &, const SourceName &);
-
 template <typename T>
 MaybeIntExpr EvaluateIntExpr(SemanticsContext &context, const T &expr) {
   if (MaybeExpr maybeExpr{

flang/lib/Semantics/tools.cpp

@@ -1654,6 +1654,37 @@ bool HasDefinedIo(common::DefinedIo which, const DerivedTypeSpec &derived,
   return parentType && HasDefinedIo(which, *parentType, scope);
 }
 
+template <typename E>
+std::forward_list<std::string> GetOperatorNames(
+    const SemanticsContext &context, E opr) {
+  std::forward_list<std::string> result;
+  for (const char *name : context.languageFeatures().GetNames(opr)) {
+    result.emplace_front("operator("s + name + ')');
+  }
+  return result;
+}
+
+std::forward_list<std::string> GetAllNames(
+    const SemanticsContext &context, const SourceName &name) {
+  std::string str{name.ToString()};
+  if (!name.empty() && name.end()[-1] == ')' &&
+      name.ToString().rfind("operator(", 0) == 0) {
+    for (int i{0}; i != common::LogicalOperator_enumSize; ++i) {
+      auto names{GetOperatorNames(context, common::LogicalOperator{i})};
+      if (llvm::is_contained(names, str)) {
+        return names;
+      }
+    }
+    for (int i{0}; i != common::RelationalOperator_enumSize; ++i) {
+      auto names{GetOperatorNames(context, common::RelationalOperator{i})};
+      if (llvm::is_contained(names, str)) {
+        return names;
+      }
+    }
+  }
+  return {str};
+}
+
 void WarnOnDeferredLengthCharacterScalar(SemanticsContext &context,
     const SomeExpr *expr, parser::CharBlock at, const char *what) {
   if (context.languageFeatures().ShouldWarn(