[clangd] Use the macro name range as the definition range.

Summary: This also aligns with the behavior of declarations.

Reviewers: sammccall

Reviewed By: sammccall

Subscribers: klimek, ilya-biryukov, jkorous-apple, ioeric, cfe-commits

Differential Revision: https://reviews.llvm.org/D44423

llvm-svn: 327401

clang-tools-extra/clangd/XRefs.cpp

@@ -219,9 +219,8 @@ std::vector<Location> findDefinitions(ParsedAST &AST, Position Pos) {
   }
 
   for (auto Item : MacroInfos) {
-    SourceRange SR(Item.Info->getDefinitionLoc(),
-                   Item.Info->getDefinitionEndLoc());
-    auto L = makeLocation(AST, SR);
+    auto Loc = Item.Info->getDefinitionLoc();
+    auto L = makeLocation(AST, SourceRange(Loc, Loc));
     if (L)
       Result.push_back(*L);
   }

clang-tools-extra/unittests/clangd/XRefsTests.cpp

@@ -207,15 +207,15 @@ TEST(GoToDefinition, All) {
 
       R"cpp(// Macro
         #define MACRO 0
-        #define [[MACRO 1]]
+        #define [[MACRO]] 1
         int main() { return ^MACRO; }
         #define MACRO 2
         #undef macro
       )cpp",
 
       R"cpp(// Macro
        class TTT { public: int a; };
-       #define [[FF(S) if (int b = S.a) {}]]
+       #define [[FF]](S) if (int b = S.a) {}
        void f() {
          TTT t;
          F^F(t);