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    TParser

    Class to parse the contents of a stream containing text data.

    Declaration

    Source position: classesh.inc line 2303

    type

  TParser = class(TObject)
  public
    constructor Create;
    destructor Destroy;
    procedure CheckToken;
    procedure CheckTokenSymbol;
    procedure Error;
    procedure ErrorFmt;
    procedure ErrorStr;
    procedure HexToBinary;
    function NextToken : AnsiChar;
    function SourcePos : LongInt;
    function TokenComponentIdent : string;
    function TokenFloat : Extended;
    function TokenInt : Int64;
    function TokenString : string;
    function TokenWideString : WideString;
    function TokenSymbolIs : Boolean;
    property FloatType: AnsiChar; {r}
    property SourceLine: Integer; {r}
    property Token: AnsiChar; {r}
  end;

    Inheritance

    Description

    This class breaks a stream of text data in tokens. Its primary use is to help reading the contents of a form file (usually a file with dfm, xfm or lfm extension), and for this reason it isn't suitable to be used as a general parser.

    The parser is always positioned on a certain token, whose type is stored in the Token property. Various methods are provided to obtain the token value in the desired format.

    To advance to the next token, invoke NextToken method.

    Properties

    Member Visibility Description
    FloatType read only public The type of a float token.
    SourceLine read only public Current source line number.
    Token read only public The type of the current token.
    See all Properties

    Methods

    Member Visibility Description
    CheckToken public Checks whether the token if of the given type.
    CheckTokenSymbol public Checks whether the token equals the given symbol.
    Create public Creates a new parser instance.
    Destroy public Destroys the parser instance.
    Error public Raises an EParserError exception with the given message.
    ErrorFmt public Raises an EParserError exception and formats the message.
    ErrorStr public Raises an EParserError exception with the given message.
    HexToBinary public Writes hexadecimal data to a stream.
    NextToken public Reads the next token and returns its type.
    SourcePos public Returns the current position in the stream.
    TokenComponentIdent public Returns the path of a subcomponent starting from the current token.
    TokenFloat public Returns the current token as a float.
    TokenInt public Returns the current token as an integer.
    TokenString public Returns the current token as a string.
    TokenSymbolIs public Returns True if the token equals the given symbol.
    TokenWideString public Returns the current token as a widestring.
    See all Methods

    See also

    Name Description
    TParser.Token The type of the current token.
    TParser.NextToken Reads the next token and returns its type.