Implement basic support for parsing function-like macros.

Author: tritao

src/CppParser/Parser.cpp

@@ -3509,7 +3509,7 @@ PreprocessedEntity* Parser::WalkPreprocessedEntity(
 
         MacroInfo* MI = P.getMacroInfo((IdentifierInfo*)II);
 
-        if (!MI || MI->isBuiltinMacro() || MI->isFunctionLike())
+        if (!MI || MI->isBuiltinMacro())
             break;
 
         clang::SourceManager& SM = c->getSourceManager();

src/Generator.Tests/AST/TestAST.cs

@@ -637,5 +637,15 @@ public void TestCompletionSpecializationInFunction()
             function.ReturnType.Type.TryGetClass(out Class specialization);
             Assert.That(specialization.IsIncomplete, Is.False);
         }
+
+        [Test]
+        public void TestPreprocessedEntities()
+        {
+            var unit = AstContext.TranslationUnits.First(u => u.FileName == "AST.h");
+            var macro = unit.PreprocessedEntities.OfType<MacroDefinition>()
+                .FirstOrDefault(exp => exp.Name == "MACRO");
+            Assert.NotNull(macro);
+            Assert.AreEqual("(x, y, z) x##y##z", macro.Expression);
+        }
     }
 }

tests/Native/AST.h

@@ -251,3 +251,5 @@ __attribute__((deprecated)) int deprecated_func(int num);
 int non_deprecated_func(int num);
 
 TestTemplateClass<double> returnIncompleteTemplateSpecialization();
+
+#define MACRO(x, y, z) x##y##z