public override DynObj VisitForStatement([NotNull] KittenGrammarParser.ForStatementContext context) { Visit(context.begin); var cond = Visit(context.cond); if (cond.t != vType.Bool) { ReportError("InvalidTypeError", $"expression \"{context.cond.GetText()}\" cannot be evaluated into bool.", context.start.Line); } var imp = Visit(context.imp); while (Visit(context.cond).BoolVal == true) { Visit(imp.FuncVal.IMP); Visit(context.iter); } return(DNull()); }
/// <summary> /// Exit a parse tree produced by <see cref="KittenGrammarParser.forStatement"/>. /// <para>The default implementation does nothing.</para> /// </summary> /// <param name="context">The parse tree.</param> public virtual void ExitForStatement([NotNull] KittenGrammarParser.ForStatementContext context) { }
/// <summary> /// Visit a parse tree produced by <see cref="KittenGrammarParser.forStatement"/>. /// <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 VisitForStatement([NotNull] KittenGrammarParser.ForStatementContext context) { return(VisitChildren(context)); }