Method: RubyVM::InstructionSequence.of

Defined in:

iseq.c

.of(body) ⇒ Object

Returns the instruction sequence containing the given proc or method.

For example, using irb:

# a proc > p = proc { num = 1 + 2 } > RubyVM::InstructionSequence.of(p) > #=> <RubyVM::InstructionSequence:block in irb_binding@(irb)>

# for a method > def foo(bar); puts bar; end > RubyVM::InstructionSequence.of(method(:foo)) > #=> <RubyVM::InstructionSequence:foo@(irb)>

Using ::compile_file:

# /tmp/iseq_of.rb def hello

puts "hello, world"

end

$a_global_proc = proc { str = ‘a’ + ‘b’ }

# in irb > require ‘/tmp/iseq_of.rb’

# first the method hello > RubyVM::InstructionSequence.of(method(:hello)) > #=> #<RubyVM::InstructionSequence:0x007fb73d7cb1d0>

# then the global proc > RubyVM::InstructionSequence.of($a_global_proc) > #=> #<RubyVM::InstructionSequence:0x007fb73d7caf78>

# File 'iseq.c', line 3088

static VALUE
iseqw_s_of(VALUE klass, VALUE body)
{
    const rb_iseq_t *iseq = NULL;

    if (rb_frame_info_p(body)) {
        iseq = rb_get_iseq_from_frame_info(body);
    }
    else if (rb_obj_is_proc(body)) {
        iseq = vm_proc_iseq(body);

        if (!rb_obj_is_iseq((VALUE)iseq)) {
            iseq = NULL;
        }
    }
    else if (rb_obj_is_method(body)) {
        iseq = rb_method_iseq(body);
    }
    else if (rb_typeddata_is_instance_of(body, &iseqw_data_type)) {
        return body;
    }

    return iseq ? iseqw_new(iseq) : Qnil;
}