/// <summary>
/// Accept the specified token and value.
/// </summary>
/// <param name="token">Token.</param>
/// <param name="strval">Strval.</param>
public bool Accept(LoreToken token, string strval)
{
var match = Match(token) && Match(strval);
Skip(match ? 1 : 0);
return(match);
}
/// <summary>
/// Accept the specified token.
/// </summary>
/// <param name="token">Token.</param>
public bool Accept(LoreToken token)
{
var match = Match(token);
Skip(match ? 1 : 0);
return(match);
}
/// <summary>
/// Expect the specified token and string.
/// </summary>
/// <param name="token">Token.</param>
/// <param name="strval">Strval.</param>
public Lexeme <LoreToken> Expect(LoreToken token, string strval)
{
var current = Current;
if (Accept(token, strval))
{
return(current);
}
if (!See())
{
throw LoreException.Create(Location).Describe("Unexpected end of file.");
}
var next = Read();
throw LoreException.Create(Location).Describe($"Unexpected token: '{next.Value}' ({next.Token})");
}
public bool Match(LoreToken token, string strval) => Current != null && Match(token) && Match(strval);
public bool Match(LoreToken token) => Current != null && Current.Token == token;
