/*
* 访问do while表达式
*/
public override object VisitDoWhileStatement([NotNull] CMMParser.DoWhileStatementContext context)
{
// addr0是codeBlock开始地址
int addr0 = codes.Count;
Visit(context.codeBlock());
IntermediateCode code0 = new IntermediateCode(0, InstructionType.push, context.expression().Start.Line);
// 查看expression的结果
Visit(context.expression());
// 比较expression的结果和0的关系，如果不相等的话，就要跳转回去执行codeBlock
IntermediateCode code1 = new IntermediateCode(addr0, InstructionType.jne, context.expression().Start.Line);
codes.Add(code0);
codes.Add(code1);
return(null);
}
/// <summary>
/// Visit a parse tree produced by <see cref="CMMParser.doWhileStatement"/>.
/// <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 VisitDoWhileStatement([NotNull] CMMParser.DoWhileStatementContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by <see cref="CMMParser.doWhileStatement"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitDoWhileStatement([NotNull] CMMParser.DoWhileStatementContext context)
{
}