public override DynObj VisitIfStatement([NotNull] KittenGrammarParser.IfStatementContext context)
{
var trueBlock = Visit(context.yes);
var cond = Visit(context.cond);
if (cond.t != vType.Bool)
{
ReportError("InvalidTypeError", $"expression \"{context.cond.GetText()}\" cannot be evaluated into bool.", context.start.Line);
}
if (cond.BoolVal == true)
{
Visit(trueBlock.FuncVal.IMP);
}
if (cond.BoolVal == false && context.no != null)
{
Visit(Visit(context.no).FuncVal.IMP);
}
return(DNull());
}
/// <summary>
/// Exit a parse tree produced by <see cref="KittenGrammarParser.ifStatement"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitIfStatement([NotNull] KittenGrammarParser.IfStatementContext context)
{
}
/// <summary>
/// Visit a parse tree produced by <see cref="KittenGrammarParser.ifStatement"/>.
/// <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 VisitIfStatement([NotNull] KittenGrammarParser.IfStatementContext context)
{
return(VisitChildren(context));
}
