[PATCH] D98876: [clang][ASTImporter] Add import support for SourceLocExpr.

[Balázs Kéri via Phabricator via cfe-commits]

balazske created this revision.
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It is possible that imported SourceLocExpr
can cause not expected behavior (if __builtin_LINE() is used
together with __LINE__ for example) but still it may be worth
to import these because some projects use it.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D98876

Files:
  clang/lib/AST/ASTImporter.cpp
  clang/unittests/AST/ASTImporterTest.cpp


Index: clang/unittests/AST/ASTImporterTest.cpp
===================================================================
--- clang/unittests/AST/ASTImporterTest.cpp
+++ clang/unittests/AST/ASTImporterTest.cpp
@@ -246,6 +246,24 @@
   EXPECT_FALSE(path.hasCycleAtBack());
 }
 
+const internal::VariadicDynCastAllOfMatcher<Stmt, SourceLocExpr> sourceLocExpr;
+
+AST_MATCHER_P(SourceLocExpr, hasBuiltinStr, StringRef, Str) {
+  return Node.getBuiltinStr() == Str;
+}
+
+TEST_P(ImportExpr, ImportSourceLocExpr) {
+  MatchVerifier<Decl> Verifier;
+  testImport("void declToImport() { (void)__builtin_FILE(); }", Lang_CXX03, "",
+             Lang_CXX03, Verifier,
+             functionDecl(hasDescendant(
+                 sourceLocExpr(hasBuiltinStr("__builtin_FILE")))));
+  testImport("void declToImport() { (void)__builtin_COLUMN(); }", Lang_CXX03,
+             "", Lang_CXX03, Verifier,
+             functionDecl(hasDescendant(
+                 sourceLocExpr(hasBuiltinStr("__builtin_COLUMN")))));
+}
+
 TEST_P(ImportExpr, ImportStringLiteral) {
   MatchVerifier<Decl> Verifier;
   testImport("void declToImport() { (void)\"foo\"; }", Lang_CXX03, "",
Index: clang/lib/AST/ASTImporter.cpp
===================================================================
--- clang/lib/AST/ASTImporter.cpp
+++ clang/lib/AST/ASTImporter.cpp
@@ -574,6 +574,7 @@
 
     // Importing expressions
     ExpectedStmt VisitExpr(Expr *E);
+    ExpectedStmt VisitSourceLocExpr(SourceLocExpr *E);
     ExpectedStmt VisitVAArgExpr(VAArgExpr *E);
     ExpectedStmt VisitChooseExpr(ChooseExpr *E);
     ExpectedStmt VisitGNUNullExpr(GNUNullExpr *E);
@@ -6482,6 +6483,21 @@
   return make_error<ImportError>(ImportError::UnsupportedConstruct);
 }
 
+ExpectedStmt ASTNodeImporter::VisitSourceLocExpr(SourceLocExpr *E) {
+  Error Err = Error::success();
+  auto BLoc = importChecked(Err, E->getBeginLoc());
+  auto RParenLoc = importChecked(Err, E->getEndLoc());
+  if (Err)
+    return std::move(Err);
+  auto ParentContextOrErr = Importer.ImportContext(E->getParentContext());
+  if (!ParentContextOrErr)
+    return ParentContextOrErr.takeError();
+
+  return new (Importer.getToContext())
+      SourceLocExpr(Importer.getToContext(), E->getIdentKind(), BLoc, RParenLoc,
+                    *ParentContextOrErr);
+}
+
 ExpectedStmt ASTNodeImporter::VisitVAArgExpr(VAArgExpr *E) {
 
   Error Err = Error::success();


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