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class_eval-i.yaml
--- !ruby/object:RI::MethodDescription aliases: [] block_params: comment: - !ruby/struct:SM::Flow::P body: Evaluates the string or block in the context of <em>mod</em>. This can be used to add methods to a class. <tt>module_eval</tt> returns the result of evaluating its argument. The optional <em>filename</em> and <em>lineno</em> parameters set the text for error messages. - !ruby/struct:SM::Flow::VERB body: " class Thing\n end\n a = %q{def hello() "Hello there!" end}\n Thing.module_eval(a)\n puts Thing.new.hello()\n Thing.module_eval("invalid code", "dummy", 123)\n" - !ruby/struct:SM::Flow::P body: <em>produces:</em> - !ruby/struct:SM::Flow::VERB body: " Hello there!\n dummy:123:in `module_eval': undefined local variable\n or method `code' for Thing:Class\n" full_name: Module#class_eval is_singleton: false name: class_eval params: | mod.class_eval(string [, filename [, lineno]]) => obj mod.module_eval {|| block } => obj visibility: public
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