DOKK / manpages / debian 10 / erlang-manpages / erl_id_trans.3erl.en
erl_id_trans(3erl) Erlang Module Definition erl_id_trans(3erl)

erl_id_trans - An identity parse transform.

This module performs an identity parse transformation of Erlang code. It is included as an example for users who wants to write their own parse transformers. If option {parse_transform,Module} is passed to the compiler, a user-written function parse_transform/2 is called by the compiler before the code is checked for errors.

parse_transform(Forms, Options) -> Forms

Types:

Forms = [erl_parse:abstract_form() | erl_parse:form_info()]
Options = [compile:option()]

Performs an identity transformation on Erlang forms, as an example.

Parse transformations are used if a programmer wants to use Erlang syntax, but with different semantics. The original Erlang code is then transformed into other Erlang code.

Note:
Programmers are strongly advised not to engage in parse transformations. No support is offered for problems encountered.

erl_parse(3erl), compile(3erl)

stdlib 3.7.1 Ericsson AB