Refactor Expr as class hierarchy instead of union (#524)

This has the benefit of making things much more type-safe, as well as
simplifying destroying member variables.

For now, many of the members are still raw pointers, but they probably
should become unique_ptrs or ordinary values.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/wast-parser-lexer-shared.h b/src/wast-parser-lexer-shared.h
index 7cd6288b..56367ab7 100644
--- a/src/wast-parser-lexer-shared.h
+++ b/src/wast-parser-lexer-shared.h
@@ -92,6 +92,7 @@ union Token {
   Script* script;
   Table* table;
   TextList text_list;
+  TryExpr* try_expr;
   TypeVector* types;
   uint32_t u32;
   uint64_t u64;