public LiteValue Visit(SyntaxElementsStatementNode Node, LiteEnv Env)
{
var Eles = new LiteValue[Node.GetChildrenNum()];
for (var Index = 0; Index < Eles.Length; ++Index)
{
Eles[Index] = Node.GetChild(Index).Accept(this, Env);
}
return(ElementsTable.AddElementsEx(new Elements(Eles)));
}
// elements ::= "[" [ expr { "," expr } ] "]"
private SyntaxElementsStatementNode ParseElementsNode()
{
if (!TokenStream_.TakeExpect(TokenType.Delimiter, "[", out Token Tok))
{
ExitCode_ = new ExitUnexpectedSymbolCode(Tok);
return(null);
}
var Node = new SyntaxElementsStatementNode();
if (TokenStream_.PeekExpect(TokenType.Delimiter, "]"))
{
TokenStream_.Take();
return(Node);
}
while (!TokenStream_.IsEnd())
{
var Arg = ParseExprNode();
if (Arg == null)
{
ExitCode_ = new ExitUnexpectedSymbolCode(TokenStream_.Peek());
return(null);
}
Node.AddNode(Arg);
if (!TokenStream_.TakeExpect(TokenType.Delimiter, out Tok))
{
ExitCode_ = new ExitUnexpectedSymbolCode(Tok);
return(null);
}
if (Tok.Code == "]")
{
return(Node);
}
if (Tok.Code == ",")
{
continue;
}
ExitCode_ = new ExitUnexpectedSymbolCode(Tok);
}
ExitCode_ = new ExitUnexpectedSymbolCode(Tok);
return(null);
}
