This software allows users to supply key alias and defaults for named arguments. It simplifies the process of inputting arguments by offering a user-friendly interface. Users can easily input the necessary arguments for efficient execution.
I recently had the opportunity to test Sub::ParamFrame, a Perl module designed to provide key alias and default values for named arguments. The SYNOPSIS code to use this feature is straightforward, and it can be imported using `use Sub::ParamFrame ':all';`.
The functionality of Sub::ParamFrame is quite interesting as it approaches a different scope of usability and covers distinct features using a different approach. While many other modules deal with named parameters and default values, this module controls the generation and behavior of a hash through a rule that a subroutine can use. When a subroutine is called, the rule appears as a command within the subroutine's body, so it's easy to generate a hash with the expected properties.
The first essential property of the rule is a name-value association of defaults. This feature is particularly interesting since Sub::ParamFrame stores this association using pfload before arguments advance from `@_`. This allows it to override some default values, making it more dynamic.
The second property of the rule is an alias mapping for argument names. The command inside the function `pfrule ('M' => $mask)` defines the keys mask function, which translates keys using the `$mask` function. The `M` command means that it can return a hash tied to the `Tie::Hash::KeysMask` class so that every hash access triggers key translation.
Additionally, the `M` command offers multiple translations acting as a CODE to transform the key into a new key. For example, the `lc` and `uc` values translate to `lc $_[0]` and `uc $_[0]` respectively. The hash `%T` defines aliases and returns a code that exists in the hash or the original key. This feature offers significant flexibility to the user.
One of the most significant advantages of using Sub::ParamFrame is the freedom to choose the position of the first named argument within `@_`. Any amount of `@_` may be shifted onto positional parameters before the command `pfload @_` takes the remaining key-value pairs. This makes it easier to use it in a more customized approach suitable for any project.
The functionality of Sub::ParamFrame is quite interesting as it approaches a different scope of usability and covers distinct features using a different approach. While many other modules deal with named parameters and default values, this module controls the generation and behavior of a hash through a rule that a subroutine can use. When a subroutine is called, the rule appears as a command within the subroutine's body, so it's easy to generate a hash with the expected properties.
The first essential property of the rule is a name-value association of defaults. This feature is particularly interesting since Sub::ParamFrame stores this association using pfload before arguments advance from `@_`. This allows it to override some default values, making it more dynamic.
The second property of the rule is an alias mapping for argument names. The command inside the function `pfrule ('M' => $mask)` defines the keys mask function, which translates keys using the `$mask` function. The `M` command means that it can return a hash tied to the `Tie::Hash::KeysMask` class so that every hash access triggers key translation.
Additionally, the `M` command offers multiple translations acting as a CODE to transform the key into a new key. For example, the `lc` and `uc` values translate to `lc $_[0]` and `uc $_[0]` respectively. The hash `%T` defines aliases and returns a code that exists in the hash or the original key. This feature offers significant flexibility to the user.
One of the most significant advantages of using Sub::ParamFrame is the freedom to choose the position of the first named argument within `@_`. Any amount of `@_` may be shifted onto positional parameters before the command `pfload @_` takes the remaining key-value pairs. This makes it easier to use it in a more customized approach suitable for any project.
What's New
Version 0.04: N/A