[NFC] Mark operator== as const (#5990)

C++20 will automatically generate an operator== with reversed operand order,
which is ambiguous with the written operator== when one argument is marked
const and the other isn't.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/emscripten-optimizer/simple_ast.h b/src/emscripten-optimizer/simple_ast.h
index e4c886dd8..ecb0e22ea 100644
--- a/src/emscripten-optimizer/simple_ast.h
+++ b/src/emscripten-optimizer/simple_ast.h
@@ -287,7 +287,7 @@ struct Value {
     return *this;
   }
 
-  bool operator==(const Value& other) {
+  bool operator==(const Value& other) const {
     if (type != other.type) {
       return false;
     }