// Function = Name, '(', [ArgList], ')'
// FunctionName = ? one of defined functions in IGrammarProductsFactory ?
private IParsingProduct ParseFunction(ISourceCode src)
{
using var ctx = src.GetFurtherContext();
var fragment = ParseName(ctx);
if (fragment == null)
{
return(null);
}
ctx.ParseWhiteSpace();
var nodes = ParseInBrackets(ctx, s => ParseArgList(s));
if (nodes == null)
{
return(null);
}
var opExp = _grammarProductsFactory.CreateFunctionInvocationNode(fragment, nodes);
if (opExp == null)
{
ctx.SetError(ParsingErrors.UndefinedFunction);
return(null);
}
ctx.Accept();
return(opExp);
}
