message: Add numerical instructions to expression parser
diff: @@ -28,6 +28,20 @@ parser_result<code> parse_expr(const uint8_t* pos)
  case instr::nop:
  case instr::end:
  case instr::i32_add:
  + case instr::i32_sub:
  + case instr::i32_mul:
  + case instr::i32_div_s:
  + case instr::i32_div_u:
  + case instr::i32_rem_s:
  + case instr::i32_rem_u:
  + case instr::i32_and:
  + case instr::i32_or:
  + case instr::i32_xor:
  + case instr::i32_shl:
  + case instr::i32_shr_s:
  + case instr::i32_shr_u:
  + case instr::i32_rotl:
  + case instr::i32_rotr:
  break;
  case instr::local_get:
  