[PATCH] D70807: [clangd] Prefer the left character if the character on the right of the cursor is semicolon.

[Haojian Wu via Phabricator via cfe-commits]

hokein created this revision.
hokein added a reviewer: sammccall.
Herald added subscribers: usaxena95, kadircet, arphaman, jkorous, MaskRay, ilya-biryukov.
Herald added a project: clang.

This would make go-to-def works on the cases like int A = abc^;


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D70807

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


Index: clang-tools-extra/clangd/unittests/SemanticSelectionTests.cpp
===================================================================
--- clang-tools-extra/clangd/unittests/SemanticSelectionTests.cpp
+++ clang-tools-extra/clangd/unittests/SemanticSelectionTests.cpp
@@ -88,11 +88,8 @@
       R"cpp( // Single statement in TU.
         [[int v = [[1^00]]]];
       )cpp",
-      // FIXME: No node found associated to the position.
       R"cpp( // Cursor at end of VarDecl.
-        void func() {
-          int v = 100 + 100^;
-        }
+        [[int v = [[100]]^]];
       )cpp",
       // FIXME: No node found associated to the position.
       R"cpp( // Cursor in between spaces.
Index: clang-tools-extra/clangd/unittests/SelectionTests.cpp
===================================================================
--- clang-tools-extra/clangd/unittests/SelectionTests.cpp
+++ clang-tools-extra/clangd/unittests/SelectionTests.cpp
@@ -234,6 +234,7 @@
       {"void foo() { [[foo^()]]; }", "CallExpr"},
       {"void foo() { [[foo^]] (); }", "DeclRefExpr"},
       {"int bar; void foo() [[{ foo (); }]]^", "CompoundStmt"},
+      {"int x = [[42]]^;", "IntegerLiteral"},
 
       // Ignores whitespace, comments, and semicolons in the selection.
       {"void foo() { [[foo^()]]; /*comment*/^}", "CallExpr"},
@@ -271,7 +272,6 @@
       // FIXME: Ideally we'd get a declstmt or the VarDecl itself here.
       // This doesn't happen now; the RAV doesn't traverse a node containing ;.
       {"int x = 42;^", nullptr},
-      {"int x = 42^;", nullptr},
 
       // Common ancestor is logically TUDecl, but we never return that.
       {"^int x; int y;^", nullptr},
Index: clang-tools-extra/clangd/Selection.cpp
===================================================================
--- clang-tools-extra/clangd/Selection.cpp
+++ clang-tools-extra/clangd/Selection.cpp
@@ -513,8 +513,8 @@
     return {Offset - 1, Offset};
   // We could choose either this byte or the previous. Usually we prefer the
   // character on the right of the cursor (or under a block cursor).
-  // But if that's whitespace, we likely want the token on the left.
-  if (isWhitespace(Buf[Offset]) && !isWhitespace(Buf[Offset - 1]))
+  // But if that's whitespace/semicolon, we likely want the token on the left.
+  if (isWhitespace(Buf[Offset]) || Buf[Offset] == ';')
     return {Offset - 1, Offset};
   return {Offset, Offset + 1};
 }


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