// this is to implement partial parsing. it counts {}, (), and []. it stops parsing at the specified type, if outside of nesting.
// also if last block token equals to the type, it will stop at the outer level. (i.e. last })
private static List <ZScriptToken> ReadEverythingUntil(ZScriptTokenizer t, ZScriptTokenType type, bool eofIsOk, bool skipWhitespace)
{
List <ZScriptToken> tokens = new List <ZScriptToken>();
int levelCurly = 0;
int levelSquare = 0;
int levelParen = 0;
while (true)
{
if (skipWhitespace)
{
t.SkipWhitespace();
}
long cpos = t.Reader.BaseStream.Position;
ZScriptToken token = t.ReadToken();
if (token == null)
{
if (!eofIsOk)
{
throw new ShaderCompileException("Expected {0} or token, got <EOF>", type);
}
break;
}
// if this is the end token, don't check anything -- just return
if (levelCurly == 0 && levelSquare == 0 && levelParen == 0 && token.Type == type)
{
// rewind and return token list
t.Reader.BaseStream.Position = cpos;
break;
}
switch (token.Type)
{
case ZScriptTokenType.OpenCurly:
levelCurly++;
break;
case ZScriptTokenType.CloseCurly:
levelCurly--;
break;
case ZScriptTokenType.OpenParen:
levelParen++;
break;
case ZScriptTokenType.CloseParen:
levelParen--;
break;
case ZScriptTokenType.OpenSquare:
levelSquare++;
break;
case ZScriptTokenType.CloseSquare:
levelSquare--;
break;
}
tokens.Add(token);
}
return(tokens);
}
