Method error_if

Tools/cases_generator/generators_common.py:236–269

(
        self,
        tkn: Token,
        tkn_iter: TokenIterator,
        uop: CodeSection,
        storage: Storage,
        inst: Instruction | None,
    )

        return f"{self.jump_prefix}JUMP_TO_LABEL(error);"

    def error_if(
        self,
        tkn: Token,
        tkn_iter: TokenIterator,
        uop: CodeSection,
        storage: Storage,
        inst: Instruction | None,
    ) -> bool:
        lparen = next(tkn_iter)
        assert lparen.kind == "LPAREN"
        first_tkn = tkn_iter.peek()
        unconditional = always_true(first_tkn)
        if unconditional:
            next(tkn_iter)
            next(tkn_iter)  # RPAREN
            self.out.start_line()
        else:
            self.out.emit_at("if ", tkn)
            self.emit(lparen)
            emit_to(self.out, tkn_iter, "RPAREN")
            self.out.emit(") {\n")
        next(tkn_iter)  # Semi colon
        storage.clear_inputs("at ERROR_IF")

        c_offset = storage.stack.sp_offset()
        try:
            offset = int(c_offset)
        except ValueError:
            offset = -1
        self.out.emit(self.goto_error(offset, storage))
        self.out.emit("\n")
        if not unconditional:
            self.out.emit("}\n")
        return not unconditional

    def tier1_to_tier2(
        self,