2015 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_anno Hans Bolinder Kenneth Lundin 1 2015-02-26 A erl_anno.xml
erl_anno Abstract Datatype for the Annotations of the Erlang Compiler

This module implements an abstract type that is used by the Erlang Compiler and its helper modules for holding data such as column, line number, and text. The data type is a collection of annotations as described in the following.

The Erlang Token Scanner returns tokens with a subset of the following annotations, depending on the options:

column

The column where the token begins.

 location

The line and column where the token begins, or just the line if the column unknown.

 text

The token's text.

From the above the following annotation is derived:

line

The line where the token begins.

Furthermore, the following annotations are supported by this module, and used by various modules:

file

A filename.

 generated

A Boolean indicating if the abstract code is compiler generated. The Erlang Compiler does not emit warnings for such code.

 record

A Boolean indicating if the origin of the abstract code is a record. Used by Dialyzer to assign types to tuple elements.

The functions column(), end_location(), line(), location(), and text() in the erl_scan module can be used for inspecting annotations in tokens.

The functions map_anno(), fold_anno(), mapfold_anno(), new_anno(), anno_from_term(), and anno_to_term() in the erl_parse module can be used for manipulating annotations in abstract code.

anno()

A collection of annotations.

The term representing a collection of annotations. It is either a location() or a list of key-value pairs.

To be changed to a non-negative integer in Erlang/OTP 19.0.

 Return the column

Returns the column of the annotations Anno.

Return the end location of the text

Returns the end location of the text of the annotations Anno. If there is no text, undefined is returned.

Return the filename

Returns the filename of the annotations Anno. If there is no filename, undefined is returned.

Return annotations given a term

Returns annotations with the representation Term.

See also to_term().

Return the generated Boolean

Returns true if the annotations Anno has been marked as generated. The default is to return false.

Test for a collection of annotations

Returns true if Term is a collection of annotations, false otherwise.

 Return the line

Returns the line of the annotations Anno.

Return the location

Returns the location of the annotations Anno.

Create a new collection of annotations

Creates a new collection of annotations given a location.

 Modify the filename

Modifies the filename of the annotations Anno.

Modify the generated marker

Modifies the generated marker of the annotations Anno.

Modify the line

Modifies the line of the annotations Anno.

Modify the location

Modifies the location of the annotations Anno.

Modify the record marker

Modifies the record marker of the annotations Anno.

Modify the text

Modifies the text of the annotations Anno.

Return the text

Returns the text of the annotations Anno. If there is no text, undefined is returned.

Return the term representing a collection of annotations

Returns the term representing the annotations Anno.

See also from_term().

See Also

erl_scan(3), erl_parse(3)