Operator (Operator v0.2.1) View Source
Helpers for defining operator aliases for functions
Operators can be hard to follow, especially with the limited number available
in Elixir. Always having a named function backing an operator makes it easy to
fall back to the named version. Named fall backs are also very useful for
piping (|>).
Examples
defmodule Example do
use Operator
@doc "Divide two numbers"
@operator :~>
def divide(a, b), do: a / b
@doc "Multiply two numbers"
@operator :<~>
def multiply(a, b), do: a * b
end
import Example
divide(10, 5)
#=> 5
10 ~> 2
#=> 5
multiply(10, 2)
#=> 20
10 <~> 2
#=> 20Link to this section Summary
Functions
Modified def that applies the most recent @operator
Define an operator alias for a named function
Workaround for defdelegate with variables in AST
Get the current value of @operator
Unset @operator to prevent operator name collisions
Link to this section Functions
Modified def that applies the most recent @operator
Examples
# ...
@operator :<~>
# ...
def add(a, b), do: a + b
add(1, 2)
#=> 3
1 <~> 2
#=> 3Define an operator alias for a named function
Examples
defalias(:max, [], 2, as: :<|>)
10 <|> 8
#=> 10Workaround for defdelegate with variables in AST
This is an ABSURD workaround. Just brute forcing the problem for now.
Need to revisit, obviously.
Having difficulty interpolating a ~> b into defdelegate because
unquoting tries to fully evaluate what looks like a function call
The hope is that this function will be able to be removed completely, hence isolating it here
Specs
get() :: nil | atom()
Get the current value of @operator
Specs
unset() :: no_return()
Unset @operator to prevent operator name collisions