Ident GetFuncSelf()
{
Node n = this.Parent;
while (!(n is FuncDeclare))
{
if (n == null)
{
break;
}
n = n.Parent;
}
FuncDeclare funcD = n as FuncDeclare;
if (funcD == null)
{
throw new CompileException("'base' should be used in class method", DotPos);
}
if (funcD.TypeInfo.Params.Count == 0)
{
throw new CompileException("Expect 'self' in method", funcD.TypeInfo.FuncPos);
}
var selfIDent = funcD.TypeInfo.Params[0];
if (selfIDent.Symbol == null)
{
throw new CompileException("invalid method param", funcD.TypeInfo.FuncPos);
}
if (selfIDent.Symbol.Usage != SymbolUsage.SelfParameter)
{
throw new CompileException("invalid self method param", funcD.TypeInfo.FuncPos);
}
return(selfIDent);
}
Stmt ParseFuncDecl()
{
var funcPos = CurrTokenPos;
Expect(TokenType.Func);
var scope = ScopeMgr.OpenScope(ScopeType.Function, funcPos);
Ident funcName;
Ident className = null;
var NameA = ParseIdent();
Scope funcAtScope;
if (CurrTokenType == TokenType.Dot)
{
Next();
funcName = ParseIdent();
className = NameA;
funcAtScope = ScopeMgr.GetClassScope(className.Name);
// 主定义文件还未出现， 所以暂时创建空的scope
if (funcAtScope == null)
{
funcAtScope = ScopeMgr.OpenClassScope(className.Name, funcPos);
ScopeMgr.CloseScope();
}
}
else
{
funcAtScope = ScopeMgr.PackageScope;
funcName = NameA;
}
var paramlist = ParseParameters(scope, className != null);
if (CurrTokenType == TokenType.LBrace)
{
var decl = new FuncDeclare(funcName, new FuncType(funcPos, paramlist, scope));
decl.ClassName = className;
funcName.Symbol = ScopeManager.Declare(decl, funcAtScope, funcName.Name, funcName.DefinePos, SymbolUsage.Func);
decl.Body = ParseBody(scope);
decl.BuildRelation();
return(decl);
}
else
{
// 声明已经结束
ScopeMgr.CloseScope();
// 函数前置声明
var decl = new DelegateDeclare(funcName, new FuncType(funcPos, paramlist, scope));
funcName.Symbol = ScopeManager.Declare(decl, ScopeMgr.PackageScope, funcName.Name, funcName.DefinePos, SymbolUsage.Delegate);
return(decl);
}
}
