argparse documentation Help

Result struct

Result is a struct that is used to communicate between argparse and user functions. Its main responsibility is to hold the result of an operation: success or failure.

Public members

Success

Result.Success is an compile-time constant (enum) that represents a successful result of an operation.

Signature

static enum Success

Error

Result.Error is a function that returns a failed result of an operation.

Signature

static auto Error(T...)(string msg, T extraArgs) static auto Error(T...)(int resultCode, string msg, T extraArgs)

Parameters

  • resultCode

    Result/exit code of an operation. If it's not specified then 1 is used.

  • msg

    Text of an error message.

  • extraArgs

    Additional arguments that are added to the text of an error message.

Notes

  • msg and extraArgs are converted to a single error message string using std.conv.text(msg, extraArgs).

  • Error message supports ANSI styling. See ANSI coloring and styling how to use.

  • Error message is passed to Config.errorHandler if it's set or printed to stderr otherwise by CLI API at the end of parsing.

Return value

Result object that represents the failed result of an operation.

exitCode

Result.exitCode is a property that returns the result/exit code. It's supposed to be returned from main() function.

Signature

int exitCode() const

Return value

Result/exit code of an operation.

opCast

Result.opCast can be used to determine whether result of an operation is successful.

Signature

bool opCast(T : bool)() const

Return value

  • true if operation is successful.

  • false otherwise.

Last modified: 07 August 2024
Param / RawParamArgumentGroup