public async Task <ParseResult> Parse(LexResult lex)
{
return(await Task <ParseResult> .Run(() =>
{
ParseContext context = new ParseContext(prefixRules, infixRules, lex);
// start parsing!
while (context.TokenStream.Count > 0)
{
try
{
context.Nodes.Add(context.ParseStatement());
}
catch (CompileException e)
{
context.Errors.Add(e.Error);
}
}
return new ParseResult(context.Nodes.ToArray(), context.Errors.ToArray());
}));
}
public ParseContext(Dictionary <TokenType, IPrefixRule> prefixRules, Dictionary <TokenType, IInfixRule> infixRules, LexResult lex)
{
this.prefixRules = prefixRules;
this.infixRules = infixRules;
TokenStream = new List <Token>(lex.Tokens);
Nodes = new List <ASTNode>();
Errors = new List <CompileError>();
eof = TokenStream[TokenStream.Count - 1];
}