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Generate Gleam code from OpenAPI 3.x specifications

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oaspec src oaspec_naming_ffi.erl
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src/oaspec_naming_ffi.erl 

%% Issue #405: persistent_term-backed memoization for the three

%% pre-compiled regexes used by `oaspec/internal/util/naming`. Without

%% this, every `to_pascal_case/1` and `to_snake_case/1` call compiles

%% the same three regexes from scratch — on a 10k-schema spec that's

%% 30k+ wasted compiles per generate run.

%%

%% `persistent_term` is the right primitive here because the cached

%% values are written exactly once per BEAM process lifetime (the first

%% caller wins) and read O(1) by every subsequent caller, with no

%% GC pressure on a hot path. The compute fun is a Gleam closure

%% returning the same `gleam/regexp` Regexp record the rest of the

%% naming module already deals with — `persistent_term` stores it

%% verbatim, no encoding tricks.



-module(oaspec_naming_ffi).

-export([memoize/2]).



memoize(Key, Compute) ->

    case persistent_term:get(Key, undefined) of

        undefined ->

            Result = Compute(),

            persistent_term:put(Key, Result),

            Result;

        Cached ->

            Cached

    end.