class Ameba::Rule::Lint::UnusedComparison
- Ameba::Rule::Lint::UnusedComparison
- Ameba::Rule::Base
- Reference
- Object
Overview
A rule that disallows unused comparisons.
For example, this is considered invalid:
a = obj.method do |x|
x == 1 # => Comparison operation has no effect
puts x
end
b = if a >= 0
c < 1 # => Comparison operation has no effect
"hello world"
end
And these are considered valid:
a = obj.method do |x|
x == 1
end
b = if a >= 0 &&
c < 1
"hello world"
end
YAML configuration example:
Lint/UnusedComparison:
Enabled: true
Included Modules
- YAML::Serializable
- YAML::Serializable::Strict
Defined in:
ameba/rule/lint/unused_comparison.crConstant Summary
-
COMPARISON_OPERATORS =
["==", "!=", "<", "<=", ">", ">=", "<=>"] of ::String
-
MSG =
"Comparison operation is unused"
Constructors
- .new(ctx : YAML::ParseContext, node : YAML::Nodes::Node)
-
.new(config = nil)
A rule that disallows unused comparisons.
Class Method Summary
-
.parsed_doc : String | Nil
Returns documentation for this rule, if there is any.
Instance Method Summary
- #description : String
- #description=(description : String)
- #enabled=(enabled : Bool)
- #enabled? : Bool
- #excluded : Array(String) | Nil
- #excluded=(excluded : Array(String) | Nil)
- #severity : Ameba::Severity
- #severity=(severity : Ameba::Severity)
- #since_version : SemanticVersion | Nil
- #since_version=(since_version : String)
- #test(source, node : Crystal::Call, last_is_used : Bool)
-
#test(source : Source)
This method is designed to test the source passed in.
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(config = nil)
#
A rule that disallows unused comparisons.
For example, this is considered invalid:
a = obj.method do |x|
x == 1 # => Comparison operation has no effect
puts x
end
b = if a >= 0
c < 1 # => Comparison operation has no effect
"hello world"
end
And these are considered valid:
a = obj.method do |x|
x == 1
end
b = if a >= 0 &&
c < 1
"hello world"
end
YAML configuration example:
Lint/UnusedComparison:
Enabled: true
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
Description copied from class Ameba::Rule::Base
This method is designed to test the source passed in. If source has issues that are tested by this rule, it should add an issue.
By default it uses a node visitor to traverse all the nodes in the source.
NOTE Must be overridden for other type of rules.