int GetUpvalueIndex(Scope baseScope, string name)
{
Scope s = baseScope.Outter;
FuncLit fl = Scope2FuncLitNode(s, Parent);
for (int i = 0; i < fl.UpValues.Count; i++)
{
if (fl.UpValues[i].Name == name)
{
return(i);
}
}
return(-1);
}
Expr ParseOperand(bool lhs)
{
var defPos = CurrTokenPos;
switch (CurrTokenType)
{
case TokenType.Identifier: // a = b
{
var x = ParseIdent();
ScopeMgr.Resolve(x);
return(x);
}
case TokenType.Base: // a= base.foo()
{
Next();
return(new BaseLit(defPos));
}
case TokenType.Number:
case TokenType.QuotedString:
{
var x = new BasicLit(_token.Value, CurrTokenType, CurrTokenPos);
Next();
return(x);
}
case TokenType.LParen: // () 括号表达式
{
Next();
var x = ParseExpr(false);
var rparenPos = CurrTokenPos;
Expect(TokenType.RParen);
return(new ParenExpr(x, defPos, rparenPos));
}
case TokenType.LBracket: // a = [] 数组初始化
{
Next();
List <Expr> values = new List <Expr>();
while (CurrTokenType != TokenType.RBracket &&
CurrTokenType != TokenType.EOF)
{
values.Add(ParseOperand(false));
if (CurrTokenType == TokenType.RBracket ||
CurrTokenType == TokenType.EOF)
{
break;
}
Expect(TokenType.Comma);
}
var rPos = CurrTokenPos;
Expect(TokenType.RBracket);
return(new ArrayExpr(values, defPos, rPos));
}
case TokenType.LBrace: // a = {} Map初始化
{
Next();
Dictionary <BasicLit, Expr> mapValues = new Dictionary <BasicLit, Expr>();
while (CurrTokenType != TokenType.RBrace &&
CurrTokenType != TokenType.EOF)
{
var key = ParseBasicLit();
Expect(TokenType.Colon);
var value = ParseRHS();
mapValues.Add(key, value);
if (CurrTokenType == TokenType.RBrace ||
CurrTokenType == TokenType.EOF)
{
break;
}
Expect(TokenType.Comma);
}
var rPos = CurrTokenPos;
Expect(TokenType.RBrace);
return(new MapExpr(mapValues, defPos, rPos));
}
case TokenType.Func: // a = func( ) {}
{
Next();
var scope = ScopeMgr.OpenScope(ScopeType.Closure, defPos);
var paramlist = ParseParameters(scope, false);
var body = ParseBody(scope);
var funclit = new FuncLit(body, new FuncType(defPos, paramlist, scope));
return(funclit);
}
}
throw new CompileException("Unknown operand", CurrTokenPos);
}
