Fix constant folding for `ParenExpr`

Adding an explicit AST node for `(expr)` was a good change, but it broke constant folding because I forgot to handle it.

1 files changed, 6 insertions, 0 deletions

diff --git a/source/slang/check.cpp b/source/slang/check.cpp
index 2b9abef90..b87f7c6bc 100644
--- a/source/slang/check.cpp
+++ b/source/slang/check.cpp
@@ -2128,6 +2128,12 @@ namespace Slang
         RefPtr<IntVal> TryConstantFoldExpr(
             ExpressionSyntaxNode* expr)
         {
+            // Unwrap any "identity" expressions
+            while (auto parenExpr = dynamic_cast<ParenExpr*>(expr))
+            {
+                expr = parenExpr->base;
+            }
+
             // TODO(tfoley): more serious constant folding here
             if (auto constExp = dynamic_cast<ConstantExpressionSyntaxNode*>(expr))
             {