public override DynObj VisitBinaryBooleanExpr([NotNull] KittenGrammarParser.BinaryBooleanExprContext context)
{
var LHS = Visit(context.left);
var RHS = Visit(context.right);
var op = context.op.Text;
if (LHS.t != vType.Bool || RHS.t != vType.Bool)
{
ReportError("InvalidTypeError", $"LHS type {LHS.typeName} and RHS type {RHS.typeName} used on operator \"{op}\"", context.start.Line);
}
switch (op)
{
case "and":
case "&&":
return(DBool(LHS.BoolVal && RHS.BoolVal));
case "or":
case "||":
return(DBool(LHS.BoolVal || RHS.BoolVal));
}
return(DNull());
}
/// <summary>
/// Exit a parse tree produced by the <c>binaryBooleanExpr</c>
/// labeled alternative in <see cref="KittenGrammarParser.expr"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitBinaryBooleanExpr([NotNull] KittenGrammarParser.BinaryBooleanExprContext context)
{
}
/// <summary>
/// Visit a parse tree produced by the <c>binaryBooleanExpr</c>
/// labeled alternative in <see cref="KittenGrammarParser.expr"/>.
/// <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 VisitBinaryBooleanExpr([NotNull] KittenGrammarParser.BinaryBooleanExprContext context)
{
return(VisitChildren(context));
}
