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Check whether all given options on the command-line are valid.
Source position: line 0
public function TCustomApplication.CheckOptions( |
const ShortOptions: String; |
const Longopts: TStrings; |
Opts: TStrings; |
NonOpts: TStrings |
):String; |
const ShortOptions: String; |
const Longopts: TStrings |
):String; |
const ShortOptions: String; |
const LongOpts: array of String |
):String; |
const ShortOptions: String; |
const LongOpts: String |
):String; |
ShortOptions |
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List of valid short options. |
Longopts |
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List of valid long options. |
Opts |
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Valid options passed to the program. |
NonOpts |
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Non-option strings passed to the program. |
Empty string or error-message
ShortOptions |
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List of valid short options. |
Longopts |
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List of valid long options. |
Empty string or error-message
ShortOptions |
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List of valid short options. |
LongOpts |
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List of valid long options. |
Empty string or error-message
ShortOptions |
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List of valid short options. |
LongOpts |
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List of valid long options. |
Empty string or error-message
CheckOptions scans the command-line and checks whether the options given are valid options. It also checks whether options that require a valued are indeed specified with a value.
The ShortOptions contains a string with valid short option characters. Each character in the string is a valid option character. If a character is followed by a colon (:), then a value must be specified. If it is followed by 2 colon characters (::) then the value is optional.
LongOpts is a list of strings (which can be specified as an array, a TStrings instance or a string with whitespace-separated values) of valid long options.
When the function returns, if Opts is non-Nil, the Opts stringlist is filled with the passed valid options. If NonOpts is non-nil, it is filled with any non-option strings that were passed on the command-line.
The function returns an empty string if all specified options were valid options, and whether options requiring a value have a value. If an error was found during the check, the return value is a string describing the error.
Options are identified as command-line parameters which start with OptionChar (by default the dash ('-') character).
if an error was found during the check, the return value is a string describing the error.
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Return the index of an option. |
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Return the value of a command-line option. |
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Check whether an option was specified. |
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Are options interpreted case sensitive or not |
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Command-line switch character |
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