[PATCH] D116536: [clangd] Fix selection on multi-dimensional array. (alternate version)

[Sam McCall via Phabricator via cfe-commits]

sammccall created this revision.
Herald added subscribers: usaxena95, kadircet, arphaman.
sammccall requested review of this revision.
Herald added subscribers: cfe-commits, MaskRay, ilya-biryukov.
Herald added a project: clang-tools-extra.

based on D116218 <https://reviews.llvm.org/D116218>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D116536

Files:
  clang-tools-extra/clangd/Selection.cpp
  clang-tools-extra/clangd/unittests/SelectionTests.cpp


Index: clang-tools-extra/clangd/unittests/SelectionTests.cpp
===================================================================
--- clang-tools-extra/clangd/unittests/SelectionTests.cpp
+++ clang-tools-extra/clangd/unittests/SelectionTests.cpp
@@ -318,6 +318,13 @@
       {"[[st^ruct {int x;}]] y;", "CXXRecordDecl"},
       {"[[struct {int x;} ^y]];", "VarDecl"},
       {"struct {[[int ^x]];} y;", "FieldDecl"},
+
+      // Tricky case: nested ConstantArrayTypeLocs have the same token range.
+      {"const int x = 1, y = 2; int array[^[[x]]][10][y];", "DeclRefExpr"},
+      {"const int x = 1, y = 2; int array[x][10][^[[y]]];", "DeclRefExpr"},
+      {"const int x = 1, y = 2; int array[x][^[[10]]][y];", "IntegerLiteral"},
+      {"const int x = 1, y = 2; [[i^nt]] array[x][10][y];", "BuiltinTypeLoc"},
+
       // FIXME: the AST has no location info for qualifiers.
       {"const [[a^uto]] x = 42;", "AutoTypeLoc"},
       {"[[co^nst auto x = 42]];", "VarDecl"},
Index: clang-tools-extra/clangd/Selection.cpp
===================================================================
--- clang-tools-extra/clangd/Selection.cpp
+++ clang-tools-extra/clangd/Selection.cpp
@@ -76,6 +76,10 @@
                  ? getSourceRange(DynTypedNode::create(*ME->getBase()))
                  : SourceRange();
   }
+  if (const auto *TL = N.get<TypeLoc>()) {
+    if (const auto ATL = TL->getAs<ArrayTypeLoc>())
+      return ATL.getBracketsRange();
+  }
   return N.getSourceRange();
 }
 
@@ -510,6 +514,7 @@
   bool TraverseTypeLoc(TypeLoc X) {
     return traverseNode(&X, [&] { return Base::TraverseTypeLoc(X); });
   }
+
   bool TraverseTemplateArgumentLoc(const TemplateArgumentLoc &X) {
     return traverseNode(&X,
                         [&] { return Base::TraverseTemplateArgumentLoc(X); });
@@ -661,6 +666,9 @@
       // type's range.
       if (auto AT = TL->getAs<AttributedTypeLoc>())
         S = AT.getModifiedLoc().getSourceRange();
+
+      if (auto AT = TL->getAs<ArrayTypeLoc>())
+        S = AT.getSourceRange();
     }
     // SourceRange often doesn't manage to accurately cover attributes.
     // Fortunately, attributes are rare.


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