private Syntax.Expression ParseUnaryExpr()
{
Syntax.UnaryOperator node = null;
switch (scan.Peek().type)
{
case Token.Type.OP_INC:
case Token.Type.OP_DEC:
case Token.Type.OP_BIT_AND:
case Token.Type.OP_STAR:
case Token.Type.OP_PLUS:
case Token.Type.OP_SUB:
case Token.Type.OP_TILDE:
case Token.Type.OP_NOT:
node = new Syntax.UnaryOperator(scan.Read());
node.SetOperand(this.ParseUnaryExpr());
return node;
case Token.Type.LPAREN:
Syntax.Expression res = null;
Token t = scan.Read();
if (IsType(scan.Peek()))
{
res = new Syntax.Cast(t);
Symbols.ParamVar var = ParseParameterDeclaration(); //this is hack
((Syntax.Cast)res).SetTypeCast(var.GetType());
CheckToken(scan.Peek(), Token.Type.RPAREN, true);
((Syntax.Cast)res).SetOperand(ParseUnaryExpr());
return res;
}
res = ParseExpression();
CheckToken(scan.Peek(), Token.Type.RPAREN, true);
return ParsePostfixExpr(res);
case Token.Type.KW_SIZEOF:
node = new Syntax.UnaryOperator(scan.Read());
if (scan.Peek().type != Token.Type.LPAREN)
{
node.SetOperand(ParseUnaryExpr());
return node;
}
scan.Read();
if (IsType(scan.Peek()))
{
((Syntax.UnaryOperator)node).SetOperand(new Syntax.Identifier(scan.Read()));
}
else
{
node.SetOperand(ParseExpression());
}
CheckToken(scan.Peek(), Token.Type.RPAREN, true);
return node;
default:
return ParsePostfixExpr();
}
}
private Syntax.Expression ParseUnaryExpr()
{
Syntax.UnaryOperator node = null;
switch (scan.Peek().type)
{
case Token.Type.OP_INC:
case Token.Type.OP_DEC:
case Token.Type.OP_BIT_AND:
case Token.Type.OP_STAR:
case Token.Type.OP_PLUS:
case Token.Type.OP_SUB:
case Token.Type.OP_TILDE:
case Token.Type.OP_NOT:
node = new Syntax.UnaryOperator(scan.Read());
node.SetOperand(this.ParseUnaryExpr());
return(node);
case Token.Type.LPAREN:
Syntax.Expression res = null;
Token t = scan.Read();
if (IsType(scan.Peek()))
{
res = new Syntax.Cast(t);
Symbols.ParamVar var = ParseParameterDeclaration(); //this is hack
((Syntax.Cast)res).SetTypeCast(var.GetType());
CheckToken(scan.Peek(), Token.Type.RPAREN, true);
((Syntax.Cast)res).SetOperand(ParseUnaryExpr());
return(res);
}
res = ParseExpression();
CheckToken(scan.Peek(), Token.Type.RPAREN, true);
return(ParsePostfixExpr(res));
case Token.Type.KW_SIZEOF:
node = new Syntax.UnaryOperator(scan.Read());
if (scan.Peek().type != Token.Type.LPAREN)
{
node.SetOperand(ParseUnaryExpr());
return(node);
}
scan.Read();
if (IsType(scan.Peek()))
{
((Syntax.UnaryOperator)node).SetOperand(new Syntax.Identifier(scan.Read()));
}
else
{
node.SetOperand(ParseExpression());
}
CheckToken(scan.Peek(), Token.Type.RPAREN, true);
return(node);
default:
return(ParsePostfixExpr());
}
}
