1996
2016
Ericsson AB, All Rights Reserved
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
The Initial Developer of the Original Code is Ericsson AB.
erl_id_trans
Robert Virding
Bjarne Däcker
1
Bjarne Däcker
97-01-21
B
erl_id_trans.sgml
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 may wish to write their own
parse transformers. If the 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
Transform Erlang forms
Forms = [erl_parse:abstract_form()
| erl_parse:form_info()]
Options = [compile:option()]
Performs an identity transformation on Erlang forms, as an example.
Parse Transformations
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.
Programmers are strongly advised not to engage in parse transformations and no support is offered for problems encountered.
See Also
erl_parse(3),
compile(3).