[PATCH] D153015: [clangd] Skip function parameter decls when evaluating variables on hover.

[Viktoriia Bakalova via Phabricator via cfe-commits]

VitaNuo created this revision.
Herald added subscribers: kadircet, arphaman.
Herald added a project: All.
VitaNuo requested review of this revision.
Herald added subscribers: cfe-commits, MaskRay, ilya-biryukov.
Herald added a project: clang-tools-extra.

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D153015

Files:
  clang-tools-extra/clangd/Hover.cpp
  clang-tools-extra/clangd/unittests/HoverTests.cpp


Index: clang-tools-extra/clangd/unittests/HoverTests.cpp
===================================================================
--- clang-tools-extra/clangd/unittests/HoverTests.cpp
+++ clang-tools-extra/clangd/unittests/HoverTests.cpp
@@ -3722,6 +3722,18 @@
   EXPECT_EQ(*HI->Value, "&bar");
 }
 
+TEST(Hover, FunctionParameterDefaulValueNotEvaluated) {
+  Annotations T(R"cpp(
+  void foo(int p^aram = 5);
+  )cpp");
+
+  TestTU TU = TestTU::withCode(T.code());
+  auto AST = TU.build();
+  auto HI = getHover(AST, T.point(), format::getLLVMStyle(), nullptr);
+  ASSERT_TRUE(HI);
+  ASSERT_FALSE(HI->Value);
+}
+
 TEST(Hover, DisableShowAKA) {
   Annotations T(R"cpp(
     using m_int = int;
Index: clang-tools-extra/clangd/Hover.cpp
===================================================================
--- clang-tools-extra/clangd/Hover.cpp
+++ clang-tools-extra/clangd/Hover.cpp
@@ -659,7 +659,8 @@
     HI.Type = printType(TAT->getTemplatedDecl()->getUnderlyingType(), Ctx, PP);
 
   // Fill in value with evaluated initializer if possible.
-  if (const auto *Var = dyn_cast<VarDecl>(D)) {
+  const auto *Var = dyn_cast<VarDecl>(D);
+  if (Var != nullptr && !llvm::isa<ParmVarDecl>(Var)) {
     if (const Expr *Init = Var->getInit())
       HI.Value = printExprValue(Init, Ctx);
   } else if (const auto *ECD = dyn_cast<EnumConstantDecl>(D)) {


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