[Fix rubocop#7928] Fix a false positive for Style/GuardClause

Fixes rubocop#7928.

This PR fixes a false positive for `Style/GuardClause`
when assigning the result of a guard condition with `else`.

CHANGELOG.md

@@ -30,6 +30,7 @@
 * [#7909](https://github.com/rubocop-hq/rubocop/pull/7909): Fix a false positive for `Lint/ParenthesesAsGroupedExpression` when using an intended grouped parentheses. ([@koic][])
 * [#7913](https://github.com/rubocop-hq/rubocop/pull/7913): Fix a false positive for `Lint/LiteralAsCondition` when using `true` literal in `while` and similar cases. ([@koic][])
 * [#7928](https://github.com/rubocop-hq/rubocop/issues/7928): Fix a false message for `Style/GuardClause` when using `and` or `or` operators for guard clause in `then` or `else` branches. ([@koic][])
+* [#7928](https://github.com/rubocop-hq/rubocop/issues/7928): Fix a false positive for `Style/GuardClause` when assigning the result of a guard condition with `else`. ([@koic][])
 
 ### Changes
 

lib/rubocop/cop/style/guard_clause.rb

@@ -126,7 +126,8 @@ def too_long_for_single_line?(node, example)
         end
 
         def accepted_form?(node, ending = false)
-          accepted_if?(node, ending) || node.condition.multiline?
+          accepted_if?(node, ending) || node.condition.multiline? ||
+            node.parent&.assignment?
         end
 
         def accepted_if?(node, ending)

spec/rubocop/cop/style/guard_clause_spec.rb

@@ -197,6 +197,19 @@ def func
     RUBY
   end
 
+  it 'does not register an offense when assigning the result of ' \
+     'a guard condition with `else`' do
+    expect_no_offenses(<<~RUBY)
+      def func
+        result = if something
+          work || raise('message')
+        else
+          test
+        end
+      end
+    RUBY
+  end
+
   context 'MinBodyLength: 1' do
     let(:cop_config) do
       { 'MinBodyLength' => 1 }