Beispiel #1
0
        public static Token Parse(Scope scope, InsertStartToken insertToken)
        {
            var code = scope.Code;

            var ret = new InsertToken(scope);

            var scopeIndent = scope.CloneIndent();

            ret.AddToken(ret._startToken = insertToken);

            var done = false;

            while (!done && !code.EndOfFile)
            {
                var token = StatementToken.TryParse(scopeIndent, t =>
                {
                    if (t is InsertEndToken)
                    {
                        ret._endToken = t as InsertEndToken;
                        done          = true;
                    }
                });
                if (token != null)
                {
                    ret.AddToken(token);
                }
            }

            return(ret);
        }
Beispiel #2
0
        public static StatementToken TryParse(Scope scope, StatementParseCallback callback = null)
        {
            var code = scope.Code;

            if (!code.SkipWhiteSpace())
            {
                return(null);
            }

            var ret = new StatementToken(scope);

            if (!code.Peek())
            {
                return(null);
            }

            switch (code.Type)
            {
            case CodeType.Word:
                switch (code.Text)
                {
                case "alter":
                {
                    var keywordToken = new KeywordToken(scope, code.MovePeekedSpan(), code.Text);
                    var token        = CreateStatement.ParseAlter(scope, keywordToken);
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "break":
                    if (scope.BreakOwner != null)
                    {
                        var keywordToken = new KeywordToken(scope, code.MovePeekedSpan(), code.Text);
                        var breakToken   = BreakStatement.Parse(scope, keywordToken);
                        ret.AddToken(breakToken);
                        if (callback != null)
                        {
                            callback(breakToken);
                        }
                        scope.BreakOwner.OnBreakAttached(breakToken);
                        return(ret);
                    }
                    break;

                case "create":
                {
                    var keywordToken = new KeywordToken(scope, code.MovePeekedSpan(), code.Text);
                    var token        = CreateStatement.ParseCreate(scope, keywordToken);
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "col":
                case "row":
                case "colff":
                case "page":
                {
                    var keywordToken = new KeywordToken(scope, code.MovePeekedSpan(), code.Text);
                    var token        = RowColStatement.Parse(scope, keywordToken);
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "continue":
                    if (scope.ContinueOwner != null)
                    {
                        var keywordToken  = new KeywordToken(scope, code.MovePeekedSpan(), code.Text);
                        var continueToken = ContinueStatement.Parse(scope, keywordToken);
                        ret.AddToken(continueToken);
                        if (callback != null)
                        {
                            callback(continueToken);
                        }
                        scope.ContinueOwner.OnContinueAttached(continueToken);
                        return(ret);
                    }
                    break;

                case "extern":
                {
                    var keywordToken = new KeywordToken(scope, code.MovePeekedSpan(), code.Text);
                    var token        = ExternStatement.Parse(scope, keywordToken);
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "extract":
                {
                    var keywordToken = new KeywordToken(scope, code.MovePeekedSpan(), code.Text);
                    var token        = ExtractStatement.Parse(scope, keywordToken);
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "footer":
                {
                    var keywordToken = new KeywordToken(scope, code.MovePeekedSpan(), code.Text);
                    var token        = FooterStatement.Parse(scope, keywordToken);
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "for":
                {
                    var keywordToken = new KeywordToken(scope, code.MovePeekedSpan(), code.Text);
                    var token        = ForStatement.Parse(scope, keywordToken);
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "format":
                {
                    var keywordToken = new KeywordToken(scope, code.MovePeekedSpan(), code.Text);
                    var token        = FormatStatement.Parse(scope, keywordToken);
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "header":
                {
                    var keywordToken = new KeywordToken(scope, code.MovePeekedSpan(), code.Text);
                    var token        = HeaderStatement.Parse(scope, keywordToken);
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "if":
                {
                    var keywordToken = new KeywordToken(scope, code.MovePeekedSpan(), code.Text);
                    var token        = IfStatement.Parse(scope, keywordToken);
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "public":
                case "private":
                case "protected":
                    if (scope.Model.FileContext.IsClass())
                    {
                        var keywordToken = new KeywordToken(scope, code.MovePeekedSpan(), code.Text);
                        ret.AddToken(keywordToken);
                        if (callback != null)
                        {
                            callback(keywordToken);
                        }
                        return(ret);
                    }
                    else
                    {
                        break;
                    }

                case "return":
                {
                    var keywordToken = new KeywordToken(scope, code.MovePeekedSpan(), code.Text);
                    var token        = ReturnStatement.Parse(scope, keywordToken);
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "select":
                {
                    var keywordToken = new KeywordToken(scope, code.MovePeekedSpan(), code.Text);
                    var token        = SelectStatement.Parse(scope, keywordToken);
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "switch":
                {
                    var keywordToken = new KeywordToken(scope, code.MovePeekedSpan(), code.Text);
                    var token        = SwitchStatement.Parse(scope, keywordToken);
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "while":
                {
                    var keywordToken = new KeywordToken(scope, code.MovePeekedSpan(), code.Text);
                    var token        = WhileStatement.Parse(scope, keywordToken);
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }
                }
                break;

            case CodeType.Preprocessor:
                switch (code.Text)
                {
                case "#insert":
                {
                    var token = InsertToken.Parse(scope, new InsertStartToken(scope, code.MovePeekedSpan()));
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "#endinsert":
                {
                    var token = new InsertEndToken(scope, code.MovePeekedSpan());
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "#replace":
                {
                    var token = ReplaceToken.Parse(scope, new ReplaceStartToken(scope, code.MovePeekedSpan()));
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "#with":
                {
                    var token = new ReplaceWithToken(scope, code.MovePeekedSpan());
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "#endreplace":
                {
                    var token = new ReplaceEndToken(scope, code.MovePeekedSpan());
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "#include":
                {
                    var token = IncludeToken.Parse(scope, new PreprocessorToken(scope, code.MovePeekedSpan(), code.Text));
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                default:
                {
                    var token = new PreprocessorToken(scope, code.MovePeekedSpan(), code.Text);
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }
                }

            case CodeType.Operator:
                switch (code.Text)
                {
                case "{":
                {
                    // Start of a 'scope'. This is not allowed in PROBE/WBDK but allow it here anyway.
                    var token = BracesToken.Parse(scope, null);
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }

                case "}":
                {
                    // Unmatched '}'. This is a syntax error, but since it's a statement breaking token, add it here and end the statement.
                    var token = new OperatorToken(scope, code.MovePeekedSpan(), "}");
                    ret.AddToken(token);
                    if (callback != null)
                    {
                        callback(token);
                    }
                    return(ret);
                }
                }
                break;
            }

            var exp = ExpressionToken.TryParse(scope, null);

            if (exp != null)
            {
                ret.AddToken(exp);
                if (callback != null)
                {
                    callback(exp);
                }

                code.SkipWhiteSpace();
            }

            if (code.ReadExact(';'))
            {
                // Empty statement. This is not allowed in PROBE/WBDK, but allow it here anyway.
                var token = new StatementEndToken(scope, code.Span);
                ret.AddToken(token);
                if (callback != null)
                {
                    callback(token);
                }
                return(ret);
            }

            return(ret);
        }