public static bool ExpectType(this JackTokenizer.ClassifiedJackToken token, bool acceptVoid = false, bool throwException = true)
{
if (token.TokenType() == JackTokenizer.JackTokenType.identifier)
{
return(true);
}
else if (
token.TokenType() == JackTokenizer.JackTokenType.keyword &&
(
token.ParseKeyWord() == JackTokenizer.JackKeywordTypes.INT ||
token.ParseKeyWord() == JackTokenizer.JackKeywordTypes.CHAR ||
token.ParseKeyWord() == JackTokenizer.JackKeywordTypes.BOOLEAN ||
(acceptVoid ? token.ParseKeyWord() == JackTokenizer.JackKeywordTypes.VOID : false)
)
)
{
return(true);
}
else
{
if (throwException)
{
throw new Exception("Expected a type keyword but found '" + token.value + "'.");
}
else
{
return(false);
}
}
}
public static bool ExpectKeyword(this JackTokenizer.ClassifiedJackToken token, JackTokenizer.JackKeywordTypes[] keywords, bool throwException = true)
{
if (token.TokenType() == JackTokenizer.JackTokenType.keyword &&
keywords.Contains(token.ParseKeyWord()))
{
return(true);
}
else
{
if (throwException)
{
throw new Exception("Expected one of these keywords '" + keywords.Select(x => x.ToString()).ToString() + "' but found '" + token.value + "'.");
}
else
{
return(false);
}
}
}
public static bool ExpectKeyword(this JackTokenizer.ClassifiedJackToken token, JackTokenizer.JackKeywordTypes keyword, bool throwException = true)
{
if (token.TokenType() == JackTokenizer.JackTokenType.keyword &&
token.ParseKeyWord() == keyword)
{
return(true);
}
else
{
if (throwException)
{
throw new Exception("Expected keyword 'class' but found '" + token.value + "'.");
}
else
{
return(false);
}
}
}
