feifan
Get typespecs for Code.compile_string() module
Hello! Is it possible to get the typespecs for a module that is compiled at runtime via Code.complie_string()? For example, if I run
compiled_module, _bytecode = Code.compile_string(
"""
defmodule UserDefinedGreeter do
@spec call(name :: String.t()) :: {:return, String.t()}
def call(name) do
{:return, "Hey " <> name}
end
end
"""
)
I end up with a UserDefinedGreeter module and I can e.g. call UserDefinedGreeter.call("foo"). However, I can’t seem to access that call typespec.
-
Code.Typespec.fetch_types(UserDefinedGreeter)returns:error -
Kernel.Typespec.beam_specs(UserDefinedGreeter)returnsnil
Is there an option I’m overlooking, or a different way to compile Elixir code at runtime that will result in the typespecs being accessible?
Marked As Solved
feifan
From that post you linked:
It turns out I can pass the bytecode to Code.Typespec.fetch_specs directly. So from the original example, this should work:
_compiled_module, bytecode = Code.compile_string(
"""
defmodule UserDefinedGreeter do
@spec call(name :: String.t()) :: {:return, String.t()}
def call(name) do
{:return, "Hey " <> name}
end
end
"""
)
Code.Typespec.fetch_specs(bytecode)
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