MacrowEx

MacrowEx provides DSL for defining rules of text replacing.

It's inspired by https://github.com/syguer/macrow Ruby gem.

Installation

If available in Hex, the package can be installed by adding macrow_ex to your list of dependencies in mix.exs:

def deps do
  [
    {:macrow_ex, "~> 0.1.1"}
  ]
end

How to use

Define your module and write use MacrowEx.

MacrowEx provides rules/2 DSL to define replacement rules.

The second argument is function to replace and must return string.

defmodule MyMacrowEx do
  use MacrowEx

  rules "hoge", fn ->
    "ほげ"
  end

  rules "len", fn array ->
    length(array) |> Integer.to_string()
  end
end

Then apply/1 apply/2 function generates in your module.

MyMacrowEx.apply("${hoge}")
"ほげ"

MyMacrowEx.apply("${hoge} length is ${len}", [1,2,3])
"ほげ length is 3"

You can customize default prefix ${ and suffix } as follows.

defmodule MyMacrowEx do
  use MacrowEx

  macro_prefix "{{"
  macro_suffix "}}"

  rules "hoge", fn ->
    "ほげ"
  end
end

MyMacrowEx.apply("{{hoge}}")
"ほげ"

Format

When you do not want to format DSL provided by MacrowEx, try to write in your .formatter.exs as follows.

[
  import_deps: [:macrow_ex]
]