private ScriptBlock CreateBlock(ScriptToken start, ScriptBlock scope)
{
var startIndex = start.Index;
var endIndex = scope.Index + scope.Content.Length;
var content = _content.Substring(startIndex, endIndex - startIndex);
return(new ScriptBlock(startIndex, content, false));
}
public ScriptBlock ParseNext()
{
if (_current == null)
{
return(null);
}
_start = _current;
while (true)
{
switch (_current.Type)
{
case ScriptTokenType.Semicolon:
{
var block = CreateBlock(false);
Read(); // Nom nom nom
return(block);
}
case ScriptTokenType.LeftParenthesis:
{
SkipBlock(ScriptTokenType.LeftParenthesis, ScriptTokenType.RightParenthesis);
break;
}
case ScriptTokenType.LeftBrace:
{
return(ParseScope());
}
case ScriptTokenType.If:
{
return(ParseStatement(ScriptTokenType.If));
}
case ScriptTokenType.Else:
{
return(ParseStatement(ScriptTokenType.Else));
}
case ScriptTokenType.While:
{
return(ParseStatement(ScriptTokenType.While));
}
case ScriptTokenType.Switch:
{
return(ParseStatement(ScriptTokenType.Switch));
}
}
if (!Read())
{
return(CreateBlock(false));
}
}
}
private bool Read()
{
_current = _tokenizer.GetNextToken();
return(_current != null);
}
private ScriptBlock CreateBlock(ScriptToken current, bool hasScope)
{
var content = _content.Substring(_start.Index, current.Index + current.Length - _start.Index);
return(new ScriptBlock(_start.Index, content, hasScope));
}
public ScriptParser(string content)
{
_content = content;
_tokenizer = new ScriptTokenizer(content);
_current = _tokenizer.GetNextToken();
}