Issue #19832 has been reported by sawa (Tsuyoshi Sawada). ---------------------------------------- Feature #19832: Method#destructive?, UnboundMethod#destructive? https://bugs.ruby-lang.org/issues/19832 * Author: sawa (Tsuyoshi Sawada) * Status: Open * Priority: Normal ---------------------------------------- I propose to add `destructive?` property to `Method` and `UnboundMethod` instances, which shall behave like: ```ruby String.instance_method(:<<).destructive? # => true String.instance_method(:+).destructive? # => false ``` One main purpose of using these classes is to inspect and make sure how a certain method behaves. Besides arity and owner, whether a method is destructive or not is one important piece of information, but currently, you cannot achieve that from `Method` or `UnboundMethod` instances. -- https://bugs.ruby-lang.org/