public LiteValue Visit(SyntaxProgramNode Node, LiteEnv Env)
{
var Val = LiteValue.Nil;
foreach (var Child in Node.GetChildren())
{
Val = Child.Accept(this, Env);
//Logger.DInfo($"{Child} => {Val}");
if (Val.IsError())
{
break;
}
}
return(Val);
}
// program ::= [ class | fn | statement ] ( ";" )
private SyntaxProgramNode ParseProgram()
{
var ProgramNode = new SyntaxProgramNode();
while (!TokenStream_.IsEnd())
{
var Tok = TokenStream_.Peek();
SyntaxNode Node;
switch (Tok.Code)
{
case "fn":
Node = ParseFunctionNode();
break;
case "class":
Node = ParseClassNode();
break;
default:
Node = ParseStatementNode();
break;
}
if (Node == null)
{
return(null);
}
ProgramNode.AddNode(Node);
if (TokenStream_.PeekExpect(TokenType.Delimiter, ";"))
{
TokenStream_.Take();
}
}
return(ProgramNode);
}
public ExitCode Analyzing()
{
ExitCode_ = ExitCode.Successful;
ProgramNode_ = ParseProgram();
return(ExitCode_);
}
