/// <summary>
/// Succeeds for any character for which the given predicate returns true. Returns the parsed character.
/// </summary>
public static IParser <char> Satisfy(Predicate <char> predicate)
{
Throw.IfNull(predicate, "predicate");
return(Parse.Try(from c in Any()
where predicate(c)
select c));
}
public void Try_Success_ReturnsSuccess()
{
var parser = from a in Parse.Try(Parse.Succeed("a"))
from b in Parse.Try(Parse.Succeed("b"))
select a + b;
var result = parser.Parse("abc");
ParseAssert.ValueEquals("ab", result);
}
public void Try_Error_ReturnsErrorAndResetsPosition()
{
var parser = Parse.Try(from x in Chars.Any()
from y in Chars.Any()
from f in Parse.Fail <char>("test")
select x);
IInputReader input = InputReader.Create("abc");
Position expectedPosition = input.GetPosition();
var result = parser.Parse(input);
ParseAssert.IsError(result);
Assert.AreEqual(expectedPosition, input.GetPosition());
}
