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Properly detect if scope references a variable

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Vitalii Elenhaupt 2019-10-27 21:53:07 +02:00
parent 904b5beec2
commit 19d9223ec1
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2 changed files with 4 additions and 3 deletions
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5
src/ameba/ast/scope.cr
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@ -90,8 +90,9 @@ module Ameba::AST
# false if not. # false if not.
def references?(variable : Variable) def references?(variable : Variable)
variable.references.any? do |reference| variable.references.any? do |reference|
reference.scope == self || inner_scopes.any?(&.references? variable) reference.scope == self ||
end inner_scopes.any?(&.references? variable)
end || variable.used_in_macro?
end end
# Returns true if current scope is a def, false if not. # Returns true if current scope is a def, false if not.

2
src/ameba/rule/lint/unused_argument.cr
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@ -55,7 +55,7 @@ module Ameba::Rule::Lint
private def find_unused_arguments(source, scope) private def find_unused_arguments(source, scope)
scope.arguments.each do |argument| scope.arguments.each do |argument|
next if argument.ignored? || scope.references?(argument.variable) || argument.variable.used_in_macro? next if argument.ignored? || scope.references?(argument.variable)
name_suggestion = scope.node.is_a?(Crystal::Block) ? '_' : "_#{argument.name}" name_suggestion = scope.node.is_a?(Crystal::Block) ? '_' : "_#{argument.name}"
issue_for argument.node, MSG % {argument.name, name_suggestion} issue_for argument.node, MSG % {argument.name, name_suggestion}