private static CsExpression parseExpressionEquality(TokenJar tok, ref int i, bool tryNotToThrow = false)
{
var left = parseExpressionRelational(tok, ref i, tryNotToThrow);
if (left == null)
return null;
while (tok[i].IsBuiltin("==") || tok[i].IsBuiltin("!="))
{
BinaryOperator op = tok[i].IsBuiltin("==") ? BinaryOperator.Eq : BinaryOperator.NotEq;
i++;
try
{
var right = parseExpressionRelational(tok, ref i);
left = new CsBinaryOperatorExpression { StartIndex = left.StartIndex, EndIndex = right.EndIndex, Left = left, Right = right, Operator = op };
}
catch (ParseException e)
{
if (e.IncompleteResult is CsExpression)
throw new ParseException(e.Message, e.Index, new CsBinaryOperatorExpression { StartIndex = tok[i].StartIndex, Left = left, Right = (CsExpression) e.IncompleteResult, Operator = op }, e);
throw new ParseException(e.Message, e.Index, left, e);
}
}
return left;
}
private static CsExpression parseExpressionRelational(TokenJar tok, ref int i, bool tryNotToThrow = false)
{
var left = parseExpressionShift(tok, ref i, tryNotToThrow);
if (left == null)
return null;
while (tok[i].IsBuiltin("<") || tok[i].IsBuiltin(">") || tok[i].IsBuiltin("<=") || tok[i].IsBuiltin(">=") || tok[i].IsBuiltin("is") || tok[i].IsBuiltin("as"))
{
if (tok[i].IsBuiltin("is") || tok[i].IsBuiltin("as"))
{
var op = tok[i].IsBuiltin("is") ? BinaryTypeOperator.Is : BinaryTypeOperator.As;
i++;
try
{
var right = parseTypeName(tok, ref i, typeIdentifierFlags.AllowKeywords | typeIdentifierFlags.AllowNullablesAndPointers | typeIdentifierFlags.AllowArrays).Item1;
return new CsBinaryTypeOperatorExpression { StartIndex = left.StartIndex, EndIndex = right.EndIndex, Left = left, Right = right, Operator = op };
}
catch (ParseException e)
{
if (e.IncompleteResult is CsTypeName)
throw new ParseException(e.Message, e.Index, new CsBinaryTypeOperatorExpression { StartIndex = tok[i].StartIndex, Left = left, Right = (CsTypeName) e.IncompleteResult, Operator = op }, e);
throw new ParseException(e.Message, e.Index, left, e);
}
}
else
{
BinaryOperator op = tok[i].IsBuiltin("<") ? BinaryOperator.Less : tok[i].IsBuiltin("<=") ? BinaryOperator.LessEq : tok[i].IsBuiltin(">") ? BinaryOperator.Greater : BinaryOperator.GreaterEq;
i++;
try
{
var right = parseExpressionShift(tok, ref i);
left = new CsBinaryOperatorExpression { StartIndex = left.StartIndex, EndIndex = right.EndIndex, Left = left, Right = right, Operator = op };
}
catch (ParseException e)
{
if (e.IncompleteResult is CsExpression)
throw new ParseException(e.Message, e.Index, new CsBinaryOperatorExpression { StartIndex = tok[i].StartIndex, Left = left, Right = (CsExpression) e.IncompleteResult, Operator = op }, e);
throw new ParseException(e.Message, e.Index, left, e);
}
}
}
return left;
}
private static CsExpression parseExpressionCoalesce(TokenJar tok, ref int i, bool tryNotToThrow = false)
{
var left = parseExpressionBoolOr(tok, ref i, tryNotToThrow);
if (left == null)
return null;
if (tok[i].IsBuiltin("??"))
{
i++;
try
{
var right = parseExpressionCoalesce(tok, ref i);
left = new CsBinaryOperatorExpression { StartIndex = left.StartIndex, EndIndex = right.EndIndex, Left = left, Right = right, Operator = BinaryOperator.Coalesce };
}
catch (ParseException e)
{
if (e.IncompleteResult is CsExpression)
throw new ParseException(e.Message, e.Index, new CsBinaryOperatorExpression { StartIndex = tok[i].StartIndex, Left = left, Right = (CsExpression) e.IncompleteResult, Operator = BinaryOperator.Coalesce }, e);
throw new ParseException(e.Message, e.Index, left, e);
}
}
return left;
}
private static CsExpression parseExpressionMultiplicative(TokenJar tok, ref int i, bool tryNotToThrow = false)
{
var left = parseExpressionUnary(tok, ref i, tryNotToThrow);
if (left == null)
return null;
while (tok[i].IsBuiltin("*") || tok[i].IsBuiltin("/") || tok[i].IsBuiltin("%"))
{
BinaryOperator op = tok[i].IsBuiltin("*") ? BinaryOperator.Times : tok[i].IsBuiltin("/") ? BinaryOperator.Div : BinaryOperator.Mod;
i++;
try
{
var right = parseExpressionUnary(tok, ref i);
left = new CsBinaryOperatorExpression { StartIndex = left.StartIndex, EndIndex = right.EndIndex, Left = left, Right = right, Operator = op };
}
catch (ParseException e)
{
if (e.IncompleteResult is CsExpression)
throw new ParseException(e.Message, e.Index, new CsBinaryOperatorExpression { StartIndex = tok[i].StartIndex, Left = left, Right = (CsExpression) e.IncompleteResult, Operator = op }, e);
throw new ParseException(e.Message, e.Index, left, e);
}
}
return left;
}
