Rename lookupModuleAlias to getRealModuleName

Author: elsh

Diff for: include/swift/AST/ASTContext.h

@@ -475,13 +475,14 @@ class ASTContext final {
   Identifier getIdentifier(StringRef Str) const;
 
   /// Convert a given alias map to a map of Identifiers between module aliases and their actual names.
-  /// For example, if '-module-alias A=X -module-alias B=Y' input is passed in, the aliases A and B are
+  /// For example, if '-module-alias Foo=X -module-alias Bar=Y' input is passed in, the aliases Foo and Bar are
   /// the names of the imported or referenced modules in source files in the main module, and X and Y
   /// are the real (physical) module names on disk.
   void setModuleAliases(const llvm::StringMap<StringRef> &aliasMap);
 
-  /// Retrieve the actual module name given a module alias name key.
-  Identifier lookupModuleAlias(Identifier key) const;
+  /// Retrieve the actual module name if a module alias is used via '-module-alias Foo=X', where Foo is
+  /// a module alias and X is the real (physical) name. Returns \p key if no aliasing is used.
+  Identifier getRealModuleName(Identifier key) const;
 
   /// Decide how to interpret two precedence groups.
   Associativity associateInfixOperators(PrecedenceGroupDecl *left,

Diff for: lib/AST/ASTContext.cpp

@@ -1651,7 +1651,7 @@ void ASTContext::setModuleAliases(const llvm::StringMap<StringRef> &aliasMap) {
   }
 }
 
-Identifier ASTContext::lookupModuleAlias(Identifier key) const {
+Identifier ASTContext::getRealModuleName(Identifier key) const {
   auto found = ModuleAliasMap.find(key);
   if (found != ModuleAliasMap.end()) {
     return found->second;

Diff for: lib/AST/Module.cpp

@@ -1565,7 +1565,7 @@ ImportedModule::removeDuplicates(SmallVectorImpl<ImportedModule> &imports) {
 
 Identifier ModuleDecl::getRealName() const {
   // This will return the real name for an alias (if used) or getName()
-  return getASTContext().lookupModuleAlias(getName());
+  return getASTContext().getRealModuleName(getName());
 }
 
 Identifier ModuleDecl::getABIName() const {