private void ParsePrimaryExpression(ref Expression expr)
{
Token token = lex.Parse();
if (Lex.TokenIsOperator(token, OperatorCode.LeftParenthesis))
{
Expression v = null;
ParseAdditiveExpression(ref v);
token = lex.Parse();
if (Lex.TokenIsNotOperator(token, OperatorCode.RightParenthesis))
{
//LogStatus(StatusLog.StateType_e.Error, "Paren expression wrong");
_errored = true;
return;
}
//expr = MakeNode(AstNodeType_e.Expression_Paren, v);
expr = new ParenthesisExpression(v);
}
else if (Lex.TokenIsOperator(token, OperatorCode.LeftBrace))
{
//string text = lex.GetRawStringUntil('}');
//token = lex.Parse();
//ExpressionBrace v = new ExpressionBrace();
//v.BracedText = MakeNode(AstNodeType_e.RawString, "{" + text + "}");
//expr = MakeNode(AstNodeType_e.Expression_Brace, v);
//lex.ConsumeAToken();
}
else if (Lex.TokenIs(token, TokenType.Identifier))
{
Identifier id = (Identifier)token.Value;
Symbol sym = null;
if (_symtab.ContainsKey(id.Name))
{
sym = _symtab[id.Name];
}
else
{
sym = new Symbol(id.Name, SymbolType.Variable, id);
_symtab.Add(id.Name, sym);
}
id.SymbolEntry = sym;
expr = new IdentifierExpression(id);
}
else if (Lex.TokenIs(token, TokenType.Constant))
{
expr = new ConstantExpression((Constant)token.Value);
}
//else if (Lex.TokenIs(token, TokenType_e.Label))
//{
// //need to check if label re-define
// Label label = (Label)token.Value;
// Symbol sym;
// if (_symtab.Contains(label.Name))
// {
// sym = _symtab[label.Name];
// }
// else
// {
// sym = new Symbol(label.Name, SymbolType_e.Label, label);
// _symtab.Add(sym);
// }
// expr = MakeNode(AstNodeType_e.Label, token.Value);
//}
//else
//{
// LogStatus(StatusLog.StateType_e.Error, "Errored");
// _errored = true;
// return;
//}
}
