public override Expression VisitFunc([NotNull] CalcLangParser.FuncContext context)
{
string name = context.Identifier().GetText();
ImmutableList <Expression> .Builder arguments = ImmutableList.CreateBuilder <Expression>();
CalcLangParser.ArglistContext argCtx = context.arglist();
while (argCtx != null)
{
arguments.Add(Visit(argCtx.expression()));
argCtx = argCtx.arglist();
}
(int index, int length) = ExpressionIndexAndLength(context.SourceInterval);
return(new FunctionCallExpression(
index, length,
name,
arguments.ToImmutable()
));
}
/// <summary>
/// Visit a parse tree produced by the <c>Func</c>
/// labeled alternative in <see cref="CalcLangParser.expression"/>.
/// <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 VisitFunc([NotNull] CalcLangParser.FuncContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by the <c>Func</c>
/// labeled alternative in <see cref="CalcLangParser.expression"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitFunc([NotNull] CalcLangParser.FuncContext context)
{
}