/// <summary> /// Visit a parse tree produced by <see cref="Generated.Z80AsmParser.relExpr"/>. /// </summary> /// <param name="context">The parse tree.</param> /// <return>The visitor result.</return> public override object VisitRelExpr(Z80AsmParser.RelExprContext context) { if (IsInvalidContext(context)) { return(null); } var expr = (ExpressionNode)VisitShiftExpr(context.GetChild(0) as Z80AsmParser.ShiftExprContext); var nextChildIndex = 2; while (nextChildIndex < context.ChildCount) { var rightExpr = VisitShiftExpr(context.GetChild(nextChildIndex) as Z80AsmParser.ShiftExprContext); var opToken = context.GetChild(nextChildIndex - 1).NormalizeToken(); var relExpr = opToken == "<" ? new LessThanOperationNode() : (opToken == "<=" ? new LessThanOrEqualOperationNode() : (opToken == ">" ? new GreaterThanOperationNode() : new GreaterThanOrEqualOperationNode() as BinaryOperationNode)); relExpr.LeftOperand = expr; relExpr.RightOperand = (ExpressionNode)rightExpr; expr = relExpr; nextChildIndex += 2; } return(expr); }
public override object VisitRelExpr(Z80AsmParser.RelExprContext context) { if (context == null) { return(null); } var subExprs = context.shiftExpr(); var expr = VisitShiftExpr(subExprs[0]); var opIndex = 1; for (var i = 1; i < subExprs.Length; i++) { var rightExpr = VisitShiftExpr(subExprs[i]); var opToken = context.GetChild(opIndex).GetText(); BinaryOperationNode relExpr; switch (opToken) { case "<": relExpr = new LessThanOperationNode(expr, rightExpr); break; case "<=": relExpr = new LessThanOrEqualOperationNode(expr, rightExpr); break; case ">": relExpr = new GreaterThanOperationNode(expr, rightExpr); break; default: // >= relExpr = new GreaterThanOrEqualOperationNode(expr, rightExpr); break; } expr = relExpr; opIndex += 2; } return(expr); }
/// <summary> /// Visit a parse tree produced by <see cref="Z80AsmParser.relExpr"/>. /// <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 VisitRelExpr([NotNull] Z80AsmParser.RelExprContext context) { return(VisitChildren(context)); }
/// <summary> /// Exit a parse tree produced by <see cref="Z80AsmParser.relExpr"/>. /// <para>The default implementation does nothing.</para> /// </summary> /// <param name="context">The parse tree.</param> public virtual void ExitRelExpr([NotNull] Z80AsmParser.RelExprContext context) { }
public LessThanOrEqualOperationNode(Z80AsmParser.RelExprContext context, Z80AsmVisitor visitor) : base(context, context.expr()[0], context.expr()[1], visitor) { }
public GreaterThanOperationNode(Z80AsmParser.RelExprContext context, Z80AsmVisitor visitor) : base(context, context.expr()[0], context.expr()[1], visitor) { }