Feature #15618 ยป 0001-Implement-Enumerator-Yielder-to_proc.patch
enumerator.c | ||
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static VALUE rb_cLazy;
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static ID id_rewind, id_new, id_to_enum;
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static ID id_next, id_result, id_receiver, id_arguments, id_memo, id_method, id_force;
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static ID id_begin, id_end, id_step, id_exclude_end;
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static VALUE sym_each, sym_cycle;
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static ID id_begin, id_end, id_step, id_exclude_end, id_to_proc;
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static VALUE sym_each, sym_cycle, sym_yield;
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#define id_call idCall
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#define id_each idEach
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... | ... | |
return obj;
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}
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/*
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* Returns a Proc object that takes an argument and yields it.
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*
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* This method is implemented so that a Yielder object can be directly
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* passed to another method as a block argument.
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*
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* enum = Enumerator.new { |y|
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* Dir.glob("*.rb") { |file|
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* File.open(file) { |f| f.each_line(&y) }
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* }
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* }
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*/
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static VALUE
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yielder_to_proc(VALUE obj)
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{
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VALUE method = rb_obj_method(obj, sym_yield);
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return rb_funcall(method, id_to_proc, 0);
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}
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static VALUE
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yielder_yield_i(RB_BLOCK_CALL_FUNC_ARGLIST(obj, memo))
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{
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... | ... | |
rb_define_method(rb_cYielder, "initialize", yielder_initialize, 0);
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rb_define_method(rb_cYielder, "yield", yielder_yield, -2);
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rb_define_method(rb_cYielder, "<<", yielder_yield_push, 1);
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rb_define_method(rb_cYielder, "to_proc", yielder_to_proc, 0);
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/* Chain */
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rb_cEnumChain = rb_define_class_under(rb_cEnumerator, "Chain", rb_cEnumerator);
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... | ... | |
id_end = rb_intern("end");
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id_step = rb_intern("step");
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id_exclude_end = rb_intern("exclude_end");
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id_to_proc = rb_intern("to_proc");
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sym_each = ID2SYM(id_each);
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sym_cycle = ID2SYM(rb_intern("cycle"));
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sym_yield = ID2SYM(rb_intern("yield"));
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InitVM(Enumerator);
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}
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test/ruby/test_enumerator.rb | ||
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assert_equal([1, 2, 3], y.yield(2, 3))
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assert_raise(LocalJumpError) { Enumerator::Yielder.new }
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# to_proc (explicit)
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a = []
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y = Enumerator::Yielder.new {|x| a << x }
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b = y.to_proc
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assert_kind_of(Proc, b)
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assert_equal([1], b.call(1))
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assert_equal([1], a)
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# to_proc (implicit)
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e = Enumerator.new { |y|
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assert_kind_of(Enumerator::Yielder, y)
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[1, 2, 3].each(&y)
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}
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assert_equal([1, 2, 3], e.to_a)
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end
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def test_size
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