public BaseExpression Parse(string source)
{
var tokenizer = new Tokenizer();
var tokens = tokenizer.Read(source);
var queue = new TokensQueue(tokens);
return Parse(queue);
}
protected IList<Token> LoadRecursive(string content, IList<Token> result, string fileName = null)
{
var tokenizer = new Tokenizer();
var fileTokens = tokenizer.Read(new FileSource { FileName = fileName, Content = content });
for (var i = 0; i < fileTokens.Count; ) {
var token = fileTokens[i++];
if (token.Type == TokenType.Literal && token.StringValue == "include") {
if (i >= fileTokens.Count) {
throw new TokenException("file name expected", token);
}
var nameToken = fileTokens[i++];
if (nameToken.Type != TokenType.String) {
throw new TokenException("file name expected", token);
}
if (i < fileTokens.Count) {
var nlToken = fileTokens[i++];
if (nlToken.Type != TokenType.NewLine) {
throw new TokenException("extra characters on line", token);
}
}
var path = _source.ResolveFile(nameToken.StringValue, fileName);
if (string.IsNullOrWhiteSpace(path)) throw new TokenException("file is not found " + nameToken.StringValue, token);
var otherContent = _source.LoadContent(path);
LoadRecursive(otherContent, result, nameToken.StringValue);
result.Add(new Token { Type = TokenType.NewLine });
} else {
i--;
CopyLine(fileTokens, result, ref i);
}
}
return result;
}
