[clangd] Fix SelectionTree to allow selection range expression in foreach loops.
Reviewers: hokein
Subscribers: ilya-biryukov, MaskRay, jkorous, arphaman, kadircet, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D66869
git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@370191 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/clangd/Selection.cpp b/clangd/Selection.cpp
index 96b10f5..cd1c84b 100644
--- a/clangd/Selection.cpp
+++ b/clangd/Selection.cpp
@@ -228,6 +228,16 @@
bool TraverseNestedNameSpecifier(NestedNameSpecifier *) { return true; }
bool TraverseType(QualType) { return true; }
+ // The DeclStmt for the loop variable claims to cover the whole range
+ // inside the parens, this causes the range-init expression to not be hit.
+ // Traverse the loop VarDecl instead, which has the right source range.
+ bool TraverseCXXForRangeStmt(CXXForRangeStmt *S) {
+ return traverseNode(S, [&] {
+ return TraverseStmt(S->getInit()) && TraverseDecl(S->getLoopVariable()) &&
+ TraverseStmt(S->getRangeInit()) && TraverseStmt(S->getBody());
+ });
+ }
+
private:
using Base = RecursiveASTVisitor<SelectionVisitor>;
diff --git a/clangd/unittests/SelectionTests.cpp b/clangd/unittests/SelectionTests.cpp
index a8ca324..e1a103e 100644
--- a/clangd/unittests/SelectionTests.cpp
+++ b/clangd/unittests/SelectionTests.cpp
@@ -261,6 +261,22 @@
struct Foo<U<int>*> {};
)cpp",
"TemplateTemplateParmDecl"},
+
+ // Foreach has a weird AST, ensure we can select parts of the range init.
+ // This used to fail, because the DeclStmt for C claimed the whole range.
+ {
+ R"cpp(
+ struct Str {
+ const char *begin();
+ const char *end();
+ };
+ Str makeStr(const char*);
+ void loop() {
+ for (const char* C : [[mak^eStr("foo"^)]])
+ ;
+ }
+ )cpp",
+ "CallExpr"},
};
for (const Case &C : Cases) {
Annotations Test(C.Code);
