public static AST.INode Parse(CharStream stream, AST.PropertyExpression property = null)
{
var startingPos = stream.Position;
try
{
if (property == null)
{
var obj = IdentifierExpression.Parse(stream);
property = new AST.PropertyExpression(obj);
}
char c;
// can be either a simple identifier ('.') or expression ('[')
while (stream.SkipAnyIfPossible(new char[] {'.', '['}, out c))
{
if (c == '.')
{
property.Add(Identifier.Parse(stream, false));
} else
{
WhiteSpace.Parse(stream, true);
property.Add(Expression.Parse(stream));
WhiteSpace.Parse(stream, true);
stream.SkipCharacter(']');
}
}
return property;
} catch (Exception e)
{
string msg = String.Format(
"something went wrong parsing an <property_expression> starting at {0}",
stream.ComputeDetailedPosition(startingPos));
throw new Exceptions.ParseException(msg, e);
}
}
public static AST.INode Parse(CharStream stream)
{
var startingPos = stream.Position;
try
{
char op;
if (stream.SkipAnyIfPossible(new char[3]{'+', '-', '!'}, out op))
{
WhiteSpace.Parse(stream, true);
var expression = Unary.Parse(stream);
return new AST.UnaryOperation(expression, op);
} else
{
return Member.Parse(stream);
}
} catch (Exception e)
{
string msg = String.Format(
"something went wrong parsing an <unary_expression> starting at {0}",
stream.ComputeDetailedPosition(startingPos));
throw new Exceptions.ParseException(msg, e);
}
}