TParser class

In unit Classes

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

Declaration

pascal

TParser = class(TObject)

Inheritance

TParser
TObject

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

`FloatType`	public	The type of a float token.
`SourceLine`	public	Current source line number.
`Token`	public	The type of the current token.

Methods

`Create`	public	Creates a new parser instance.
`Destroy`	public	Destroys the parser instance.
`CheckToken`	public	Checks whether the token if of the given type.
`CheckTokenSymbol`	public	Checks whether the token equals the given symbol.
`Error`	public	Raises an exception with the given message.
`ErrorFmt`	public	Raises an exception and formats the message.
`ErrorStr`	public	Raises an 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.
`TokenWideString`	public	Returns the current token as a widestring.
`TokenSymbolIs`	public	Returns True if the token equals the given symbol.

Inherited

From TObject (40)

AfterConstruction BeforeDestruction CheckDisposed ClassInfo ClassName ClassNameIs ClassParent ClassType CleanupInstance DefaultHandler DefaultHandlerStr Dispatch DispatchStr Disposed DisposeOf Equals FieldAddress Free FreeInstance GetDisposed GetHashCode GetInterface GetInterfaceByStr GetInterfaceEntry GetInterfaceEntryByStr GetInterfaceTable GetInterfaceWeak GetLastCastErrorInfo InheritsFrom InitInstance InstanceSize MethodAddress MethodName newinstance QualifiedClassName SafeCallException StringMessageTable SystemHasExtendedRTTI ToString UnitName

An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.