Update rethrow depth handling and catch_all opcode (#1608)

Give `catch_all` its own opcode:

Previously `catch_all` shared an opcode with `else`, but
the spec now allocates it the 0x19 opcode.

Adjust rethrow depth semantics:

Previously this had interpreted the rethrow depth argument
as counting only catch blocks, but the spec has clarified that
it should count all blocks (in a similar fashion as `br` and
related instructions).

1 files changed, 1 insertions, 0 deletions

diff --git a/src/binary-reader.h b/src/binary-reader.h
index 6ba4c9b7..19643aa8 100644
--- a/src/binary-reader.h
+++ b/src/binary-reader.h
@@ -231,6 +231,7 @@ class BinaryReaderDelegate {
   virtual Result OnCallExpr(Index func_index) = 0;
   virtual Result OnCallIndirectExpr(Index sig_index, Index table_index) = 0;
   virtual Result OnCatchExpr(Index event_index) = 0;
+  virtual Result OnCatchAllExpr() = 0;
   virtual Result OnCompareExpr(Opcode opcode) = 0;
   virtual Result OnConvertExpr(Opcode opcode) = 0;
   virtual Result OnDelegateExpr(Index depth) = 0;