End of Life Ruby 3.2 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

RubyVM::InstructionSequence#label

label

static VALUE
iseqw_label(VALUE self)
{
    return rb_iseq_label(iseqw_check(self));
}

Returns the label of this instruction sequence.

<main> if it’s at the top level, <compiled> if it was evaluated from a string.

For example, using irb:

Example

iseq = RubyVM::InstructionSequence.compile('num = 1 + 2')
#=> <RubyVM::InstructionSequence:<compiled>@<compiled>>
iseq.label
#=> "<compiled>"

Using ::compile_file:

# /tmp/method.rb
def hello
  puts "hello, world"
end

# in irb
> iseq = RubyVM::InstructionSequence.compile_file('/tmp/method.rb')
> iseq.label #=> <main>

See also #inspect #path #first_lineno #script_lines also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0

‹ prev#inspect next ›#path