/// <summary>
/// return value;
/// </summary>
/// <returns></returns>
public override Expr Parse()
{
var token = _tokenIt.NextToken;
var exp = new FunctionExpr();
_parser.SetupContext(exp, token);
var name = "anon_" + token.Line + "_" + token.LineCharPos;
_tokenIt.Advance();
_tokenIt.Expect(Tokens.LeftParenthesis);
var argnames = _parser.ParseNames();
exp.Meta.Init(name, argnames);
_tokenIt.Expect(Tokens.RightParenthesis);
ParseBlock(exp);
var lambdaExp = new LambdaExpr();
lambdaExp.Expr = exp;
return lambdaExp;
}
public object VisitLambda(LambdaExpr expr)
{
return null;
}
public object VisitLambda(LambdaExpr expr)
{
var funcType = new LFunctionType();
funcType.Name = expr.Expr.Meta.Name;
funcType.FullName = funcType.Name;
var func = new LFunction(expr.Expr);
func.Type = funcType;
return func;
}
public Expr OnParseLambda()
{
var tokenIt = this._parser.TokenIt;
var initiatorToken = tokenIt.NextToken;
// <codeLambda>
// Check for lambda or function declare.
var next = tokenIt.Peek();
if (next.Token != Tokens.LeftParenthesis)
{
return OnParseFunctionDeclare();
}
// This a lambda.
var expr = new LambdaExpr();
var funcExp = new FunctionExpr();
expr.Expr = funcExp;
expr.Expr.Meta = new FunctionMetaData();
this._parser.SetupContext(funcExp, initiatorToken);
var name = "anon_" + initiatorToken.Line + "_" + initiatorToken.LineCharPos;
tokenIt.Advance();
tokenIt.Expect(Tokens.LeftParenthesis);
var argnames = _parser.ParseNames();
funcExp.Meta.Init(name, argnames);
tokenIt.Expect(Tokens.RightParenthesis);
this.OnParseLambdaBlock(funcExp);
// </codeLambda>
this._parser.SetupContext(expr, initiatorToken);
return expr;
}