Specifications for Functions and Callbacks
Learn about the specifications of functions using @spec.
We'll cover the following
The @spec
attribute specifies a function’s parameter count, types, and return value type. It can appear anywhere in a module that defines the function, but by convention, it sits immediately before the function definition, following any function documentation.
We’ve already seen the syntax:
@spec function_name( param1_type, ...) :: return_type
Examples
Let’s see some examples. These come from the built-in Dict
module.
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