public static object ParseExpressionTail(ParserState s, object lhs, int minLevel, bool allowStructInitializer)
{
while (true)
{
if (s.Token.Type == TokenType.OpenParen && minLevel <= 25)
{
var result = new CallExpression {
Target = lhs, Args = new List <object>()
};
ReadToken(s);
while (s.Token.Type != TokenType.CloseParen)
{
result.Args.Add(ParseExpression(s, 0, true));
if (s.Token.Type == TokenType.CloseParen)
{
break;
}
ParseTokenWithType(s, TokenType.Comma);
}
ParseTokenWithType(s, TokenType.CloseParen);
lhs = result;
}
else if (s.Token.Type == TokenType.OpenBracket && minLevel <= 25)
{
var result = new IndexExpression {
Target = lhs
};
ReadToken(s);
result.Arg = ParseExpression(s, 0, true);
ParseTokenWithType(s, TokenType.CloseBracket);
lhs = result;
}
else if (s.Token.Type == TokenType.OpenAngleBracket && (lhs is Token || lhs is DotExpression) && minLevel <= 25)
{
if (lhs is Token)
{
var token = (Token)lhs;
if (IsProbablyANamespace(token.Value))
{
lhs = ParseTypeArgsExpressionTail(s, token);
}
else
{
s.Token.Type = TokenType.Operator;
}
}
else
{
var e = (DotExpression)lhs;
var exLhs = e.Lhs;
if (exLhs is Token && IsProbablyANamespace(((Token)exLhs).Value))
{
lhs = ParseTypeArgsExpressionTail(s, e);
}
else
{
s.Token.Type = TokenType.Operator;
}
}
}
else if (s.Token.Type == TokenType.OpenBrace && minLevel <= 25 && allowStructInitializer)
{
if ((lhs is Token && ((Token)lhs).Type == TokenType.Identifier) || lhs is TypeModifierExpression || lhs is TypeArgsExpression)
{
var result = new StructInitializerExpression {
Target = lhs, Args = new List <FieldInitializerExpression>()
};
ReadToken(s);
while (s.Token.Type != TokenType.CloseBrace)
{
var fie = new FieldInitializerExpression {
FieldName = ParseTokenWithType(s, TokenType.Identifier)
};
ReadToken(s);
fie.Expr = ParseExpression(s, 0, true);
result.Args.Add(fie);
if (s.Token.Type == TokenType.CloseBrace)
{
break;
}
ParseTokenWithType(s, TokenType.Comma);
}
ParseTokenWithType(s, TokenType.CloseBrace);
lhs = result;
}
else
{
return(lhs);
}
}
else if (s.Token.Type == TokenType.CloseAngleBracket)
{
s.Token.Type = TokenType.Operator;
}
else if (s.Token.Type == TokenType.Operator)
{
var level = GetBindingLevel(s.Token.Value);
if (level < minLevel)
{
return(lhs);
}
if (s.Token.Value == "?")
{
var result = new TernaryOperatorExpression {
ConditionExpr = lhs
};
ReadToken(s);
result.First = ParseExpression(s, 10, allowStructInitializer);
ParseTokenWithType(s, TokenType.Colon);
result.Second = ParseExpression(s, 10, allowStructInitializer);
lhs = result;
}
else if (s.Token.Value == "^")
{
var result = new PostfixUnaryOperatorExpression {
Expr = lhs
};
result.Op = s.Token;
ReadToken(s);
lhs = result;
}
else if (s.Token.Value == ".")
{
var result = new DotExpression {
Lhs = lhs
};
ReadToken(s);
if (s.Token.Type == TokenType.Identifier)
{
result.Rhs = s.Token;
ReadToken(s);
}
lhs = result;
}
else if (level >= 0)
{
var result = new BinaryOperatorExpression {
Lhs = lhs
};
result.Op = s.Token;
ReadToken(s);
result.Rhs = ParseExpression(s, level + 1, allowStructInitializer);
lhs = result;
}
else
{
return(lhs);
}
}
else
{
return(lhs);
}
}
}
public static void CheckBinaryOperatorExpression(RangeFinderState s, BinaryOperatorExpression a)
{
CheckAny(s, a.Lhs);
CheckToken(s, a.Op);
CheckAny(s, a.Rhs);
}