[PATCH] D137650: [clangd] Implement hover for string literals

[v1nh1shungry via Phabricator via cfe-commits]

v1nh1shungry updated this revision to Diff 474399.
v1nh1shungry added a comment.

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Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D137650/new/

https://reviews.llvm.org/D137650

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
@@ -1300,7 +1300,6 @@
       "auto x = ^42.0i;",
       "auto x = ^42;",
       "auto x = ^nullptr;",
-      "auto x = ^\"asdf\";",
   };
 
   for (const auto &Test : Tests) {
@@ -1326,6 +1325,12 @@
          HI.Type = "char";
          HI.Value = "65 (0x41)";
        }},
+      {"auto s = ^[[\"Hello, world!\"]]; // string literal",
+       [](HoverInfo &HI) {
+         HI.Name = "String Literal";
+         HI.Size = 14;
+         HI.Type = "const char[14]";
+       }},
       {
           R"cpp(// Local variable
             int main() {
Index: clang-tools-extra/clangd/Hover.cpp
===================================================================
--- clang-tools-extra/clangd/Hover.cpp
+++ clang-tools-extra/clangd/Hover.cpp
@@ -777,6 +777,17 @@
   return HI;
 }
 
+HoverInfo getStringLiteralContents(const StringLiteral *SL,
+                                   const PrintingPolicy &PP) {
+  HoverInfo HI;
+
+  HI.Name = "String Literal";
+  HI.Size = (SL->getLength() + 1) * SL->getCharByteWidth();
+  HI.Type = SL->getType().getAsString(PP).c_str();
+
+  return HI;
+}
+
 bool isLiteral(const Expr *E) {
   // Unfortunately there's no common base Literal classes inherits from
   // (apart from Expr), therefore these exclusions.
@@ -785,7 +796,7 @@
          llvm::isa<CXXNullPtrLiteralExpr>(E) ||
          llvm::isa<FixedPointLiteral>(E) || llvm::isa<FloatingLiteral>(E) ||
          llvm::isa<ImaginaryLiteral>(E) || llvm::isa<IntegerLiteral>(E) ||
-         llvm::isa<StringLiteral>(E) || llvm::isa<UserDefinedLiteral>(E);
+         llvm::isa<UserDefinedLiteral>(E);
 }
 
 llvm::StringLiteral getNameForExpr(const Expr *E) {
@@ -810,6 +821,9 @@
     return llvm::None;
 
   HoverInfo HI;
+  // Print the type and the size for string literals
+  if (const StringLiteral *SL = dyn_cast<StringLiteral>(E))
+    return getStringLiteralContents(SL, PP);
   // For `this` expr we currently generate hover with pointee type.
   if (const CXXThisExpr *CTE = dyn_cast<CXXThisExpr>(E))
     return getThisExprHoverContents(CTE, AST.getASTContext(), PP);


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