erl_expand_records(3erl) Erlang Module Definition erl_expand_records(3erl)NAME
erl_expand_records - Expands Records in a Module
DESCRIPTION EXPORTS
module(AbsForms, CompileOptions) -> AbsForms
Types AbsForms = [term()]
CompileOptions = [term()]
Expands all records in a module. The returned module has no references to records, neither attributes nor code.
SEE ALSO
The abstract format documentation in ERTS User's Guide
Ericsson AB stdlib 1.17.3 erl_expand_records(3erl)
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erl_lint(3erl) Erlang Module Definition erl_lint(3erl)NAME
erl_lint - The Erlang Code Linter
DESCRIPTION
This module is used to check Erlang code for illegal syntax and other bugs. It also warns against coding practices which are not recom-
mended.
The errors detected include:
* redefined and undefined functions
* unbound and unsafe variables
* illegal record usage.
Warnings include:
* unused functions and imports
* unused variables
* variables imported into matches
* variables exported from if / case / receive
* variables shadowed in lambdas and list comprehensions.
Some of the warnings are optional, and can be turned on by giving the appropriate option, described below.
The functions in this module are invoked automatically by the Erlang compiler and there is no reason to invoke these functions separately
unless you have written your own Erlang compiler.
EXPORTS
module(AbsForms) -> {ok,Warnings} | {error,Errors,Warnings}
module(AbsForms, FileName) -> {ok,Warnings} | {error,Errors,Warnings}
module(AbsForms, FileName, CompileOptions) -> {ok,Warnings} | {error,Errors,Warnings}
Types AbsForms = [term()]
FileName = FileName2 = atom() | string()
Warnings = Errors = [{Filename2,[ErrorInfo]}]
ErrorInfo = see separate description below.
CompileOptions = [term()]
This function checks all the forms in a module for errors. It returns:
{ok,Warnings} :
There were no errors in the module.
{error,Errors,Warnings} :
There were errors in the module.
Since this module is of interest only to the maintainers of the compiler, and to avoid having the same description in two places to
avoid the usual maintenance nightmare, the elements of Options that control the warnings are only described in compile(3erl) .
The AbsForms of a module which comes from a file that is read through epp , the Erlang pre-processor, can come from many files. This
means that any references to errors must include the file name (see epp(3erl) , or parser erl_parse(3erl) ). The warnings and errors
returned have the following format:
[{FileName2,[ErrorInfo]}]
The errors and warnings are listed in the order in which they are encountered in the forms. This means that the errors from one file
may be split into different entries in the list of errors.
is_guard_test(Expr) -> bool()
Types Expr = term()
This function tests if Expr is a legal guard test. Expr is an Erlang term representing the abstract form for the expression.
erl_parse:parse_exprs(Tokens) can be used to generate a list of Expr .
format_error(ErrorDescriptor) -> Chars
Types ErrorDescriptor = errordesc()
Chars = [char() | Chars]
Takes an ErrorDescriptor and returns a string which describes the error or warning. This function is usually called implicitly when
processing an ErrorInfo structure (see below).
ERROR INFORMATION
The ErrorInfo mentioned above is the standard ErrorInfo structure which is returned from all IO modules. It has the following format:
{ErrorLine, Module, ErrorDescriptor}
A string which describes the error is obtained with the following call:
Module:format_error(ErrorDescriptor)
SEE ALSO erl_parse(3erl) , epp(3erl)Ericsson AB stdlib 1.17.3 erl_lint(3erl)