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Class TOption

Description
Hierarchy
Fields
Methods
Properties

Unit

PasDoc_OptionParser

Declaration

type TOption = class(TObject)

Description

abstract base class for options

This class implements all the basic functionality and provides abstract methods for the TOptionParser class to call, which are overridden by descendants. It also provides function to write the explanation.

Hierarchy

  • TObject
  • TOption

Overview

Fields

Protected FShort: char;
Protected FLong: string;
Protected FShortSens: boolean;
Protected FLongSens: boolean;
Protected FExplanation: string;
Protected FWasSpecified: boolean;
Protected FParser: TOptionParser;

Methods

Protected function ParseOption(const AWords: TStrings): boolean; virtual; abstract;
Public constructor Create(const AShort:char; const ALong: string);
Public constructor CreateEx(const AShort:char; const ALong: string; const AShortCaseSensitive, ALongCaseSensitive: boolean); virtual;
Public function GetOptionWidth: Integer;
Public procedure WriteExplanation(const AOptWidth: Integer);

Properties

Public property ShortForm: char read FShort write FShort;
Public property LongForm: string read FLong write FLong;
Public property ShortCaseSensitive: boolean read FShortSens write FShortSens;
Public property LongCaseSensitive: boolean read FLongSens write FLongSens;
Public property WasSpecified: boolean read FWasSpecified;
Public property Explanation: string read FExplanation write FExplanation;

Description

Fields

Protected FShort: char;
 
Protected FLong: string;
 
Protected FShortSens: boolean;
 
Protected FLongSens: boolean;
 
Protected FExplanation: string;
 
Protected FWasSpecified: boolean;
 
Protected FParser: TOptionParser;
 

Methods

Protected function ParseOption(const AWords: TStrings): boolean; virtual; abstract;
 
Public constructor Create(const AShort:char; const ALong: string);

Create a new Option. Set AShort to #0 in order to have no short option. Technically you can set ALong to '' to have no long option, but in practive *every* option should have long form. Don't override this in descendants (this always simply calls CreateEx). Override only CreateEx.

Public constructor CreateEx(const AShort:char; const ALong: string; const AShortCaseSensitive, ALongCaseSensitive: boolean); virtual;
 
Public function GetOptionWidth: Integer;

returns the width of the string "-s, --long-option" where s is the short option. Removes non-existant options (longoption = '' or shortoption = #0)

Public procedure WriteExplanation(const AOptWidth: Integer);

writes the wrapped explanation including option format, AOptWidth determines how much it is indented & wrapped

Properties

Public property ShortForm: char read FShort write FShort;

Short form of the option — single character — if #0 then not used

Public property LongForm: string read FLong write FLong;

long form of the option — string — if empty, then not used

Public property ShortCaseSensitive: boolean read FShortSens write FShortSens;

specified whether the short form should be case sensitive or not

Public property LongCaseSensitive: boolean read FLongSens write FLongSens;

specifies whether the long form should be case sensitive or not

Public property WasSpecified: boolean read FWasSpecified;

signifies if the option was specified at least once

Public property Explanation: string read FExplanation write FExplanation;

explanation for the option, see also WriteExplanation

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