[clang] Implement CompilerInvocation copy assignment

This patch implements the copy assignment for `CompilerInvocation`.

Eventually, the deep-copy operation will be moved into a `clone()` method (D100460), but until then, this is necessary for basic ergonomics.

Depends on D100455.

Reviewed By: Bigcheese

Differential Revision: https://reviews.llvm.org/D100473

1 files changed, 12 insertions, 1 deletions

diff --git a/clang/unittests/Frontend/CompilerInvocationTest.cpp b/clang/unittests/Frontend/CompilerInvocationTest.cpp
index 5062a2e..0baf17f 100644
--- a/clang/unittests/Frontend/CompilerInvocationTest.cpp
+++ b/clang/unittests/Frontend/CompilerInvocationTest.cpp
@@ -97,7 +97,7 @@ TEST(ContainsN, Two) {
   ASSERT_THAT(Array, ContainsN(StrEq("x"), 2));
 }
 
-// Copy constructor performs a deep copy of reference-counted pointers.
+// Copy constructor/assignment perform deep copy of reference-counted pointers.
 
 TEST(CompilerInvocationTest, DeepCopyConstructor) {
   CompilerInvocation A;
@@ -109,6 +109,17 @@ TEST(CompilerInvocationTest, DeepCopyConstructor) {
   ASSERT_EQ(A.getAnalyzerOpts()->Config["Key"], "Old");
 }
 
+TEST(CompilerInvocationTest, DeepCopyAssignment) {
+  CompilerInvocation A;
+  A.getAnalyzerOpts()->Config["Key"] = "Old";
+
+  CompilerInvocation B;
+  B = A;
+  B.getAnalyzerOpts()->Config["Key"] = "New";
+
+  ASSERT_EQ(A.getAnalyzerOpts()->Config["Key"], "Old");
+}
+
 // Boolean option with a keypath that defaults to true.
 // The only flag with a negative spelling can set the keypath to false.