Class: Shirobai::Cop::Style::MutableConstant

Inherits:
RuboCop::Cop::Base
  • Object
show all
Extended by:
RuboCop::Cop::AutoCorrector
Includes:
RuboCop::Cop::ConfigurableEnforcedStyle, RuboCop::Cop::FrozenStringLiteral
Defined in:
lib/shirobai/cop/style/mutable_constant.rb

Overview

Drop-in Rust-accelerated reimplementation of Style/MutableConstant.

Style/MutableConstant is almost entirely AST work: the on_casgn value-mutability check (literal_check / strict_check), the shareable_constant_value magic-comment scope scan (which reads processed_source.lines, NOT the token stream), and the .freeze autocorrect with all its branches (splat expansion, array bracketing, range / send parenthesizing, recursive nested freezing). That part is stock's, copied verbatim from vendor/rubocop/lib/rubocop/cop/style/mutable_constant.rb, so detection and -A bytes match stock exactly.

The ONE place stock reaches the parser-gem token stream (the "toucher" cost) is FrozenStringLiteral#frozen_string_literals_enabled?, via leading_comment_lines -> processed_source.tokens. This wrapper replaces ONLY that method with the token-free Rust leading-comment scan (shared with Lint/DuplicateMagicComment / Style/FrozenStringLiteralComment / Style/EmptyLiteral). Everything else, including the whole FrozenStringLiteral mixin around it, stays stock.

Constant Summary collapse

MSG = 
"Freeze mutable objects assigned to constants."

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.badge ⇒ Object 



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# File 'lib/shirobai/cop/style/mutable_constant.rb', line 70

def self.badge = RuboCop::Cop::Badge.parse(cop_name)

.bundle_args(_config) ⇒ Object

Not a bundled cop (it dispatches on_casgn normally); the only Rust call is the token-free frozen_string_literals_enabled? helper. Kept for the 4+1 single-source-of-config convention.



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# File 'lib/shirobai/cop/style/mutable_constant.rb', line 75

def self.bundle_args(_config)
  []
end

.cop_name ⇒ Object 



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# File 'lib/shirobai/cop/style/mutable_constant.rb', line 69

def self.cop_name = "Style/MutableConstant"

Instance Method Details

#on_casgn(node) ⇒ Object 



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# File 'lib/shirobai/cop/style/mutable_constant.rb', line 79

def on_casgn(node)
  if node.expression.nil? # This is only the case for `CONST += ...` or similar
    parent = node.parent
    return unless parent.or_asgn_type? # We only care about `CONST ||= ...`

    on_assignment(parent.children.last)
  else
    on_assignment(node.expression)
  end
end