class Ameba::Rule::Lint::ShadowedException

Overview

A rule that disallows a rescued exception that get shadowed by a less specific exception being rescued before a more specific exception is rescued.

For example, this is invalid:

begin
  do_something
rescue Exception
  handle_exception
rescue ArgumentError
  handle_argument_error_exception
end

And it has to be written as follows:

begin
  do_something
rescue ArgumentError
  handle_argument_error_exception
rescue Exception
  handle_exception
end

YAML configuration example:

Lint/ShadowedException:
  Enabled: true

Included Modules

Defined in:

ameba/rule/lint/shadowed_exception.cr

Constant Summary

MSG = "Shadowed exception found: %s"

Constructors

Class Method Summary

Instance Method Summary

Instance methods inherited from class Ameba::Rule::Base

==(other) ==, catch(source : Source) catch, excluded?(source) excluded?, group group, hash hash, name name, special? special?, test(source : Source, node : Crystal::ASTNode, *opts)
test(source : Source) test

Class methods inherited from class Ameba::Rule::Base

default_severity : Ameba::Severity default_severity

Macros inherited from class Ameba::Rule::Base

issue_for(*args, **kwargs, &block) issue_for

Macros inherited from module Ameba::Config::RuleConfig

properties(&block) properties

Constructor Detail

def self.new(ctx : YAML::ParseContext, node : YAML::Nodes::Node) #

def self.new(config = nil) #

A rule that disallows a rescued exception that get shadowed by a less specific exception being rescued before a more specific exception is rescued.

For example, this is invalid:

begin
  do_something
rescue Exception
  handle_exception
rescue ArgumentError
  handle_argument_error_exception
end

And it has to be written as follows:

begin
  do_something
rescue ArgumentError
  handle_argument_error_exception
rescue Exception
  handle_exception
end

YAML configuration example:

Lint/ShadowedException:
  Enabled: true

[View source]

Class Method Detail

def self.parsed_doc : String | Nil #

Returns documentation for this rule, if there is any.

module Ameba
  # This is a test rule.
  # Does nothing.
  class MyRule < Ameba::Rule::Base
    def test(source)
    end
  end
end

MyRule.parsed_doc # => "This is a test rule.\nDoes nothing."

Instance Method Detail

def description : String #

def description=(description : String) #

def enabled=(enabled : Bool) #

def enabled? : Bool #

def excluded : Array(String) | Nil #

def excluded=(excluded : Array(String) | Nil) #

def severity : Ameba::Severity #

def severity=(severity : Ameba::Severity) #

def test(source, node : Crystal::ExceptionHandler) #

[View source]