/* * 写指令 */ public override object VisitWriteStatement([NotNull] CMMParser.WriteStatementContext context) { IntermediateCode code; if (context.ChildCount == 4) { // write不带参数 code = new IntermediateCode(0, InstructionType.write, context.Start.Line); } else { // write带参数 先访问参数 将其压栈 VisitChildren(context); // 打印栈顶元素 code = new IntermediateCode(1, InstructionType.write, context.Start.Line); } codes.Add(code); return(null); }
/// <summary> /// Visit a parse tree produced by <see cref="CMMParser.writeStatement"/>. /// <para> /// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/> /// on <paramref name="context"/>. /// </para> /// </summary> /// <param name="context">The parse tree.</param> /// <return>The visitor result.</return> public virtual Result VisitWriteStatement([NotNull] CMMParser.WriteStatementContext context) { return(VisitChildren(context)); }
/// <summary> /// Exit a parse tree produced by <see cref="CMMParser.writeStatement"/>. /// <para>The default implementation does nothing.</para> /// </summary> /// <param name="context">The parse tree.</param> public virtual void ExitWriteStatement([NotNull] CMMParser.WriteStatementContext context) { }