method

__enable

v2_6_3 - Show latest stable - 0 notes - Class: TracePoint

1_8_6_287
1_8_7_72
1_8_7_330
1_9_1_378
1_9_2_180
1_9_3_125
1_9_3_392
2_1_10
2_2_9
2_4_6
2_5_5
2_6_3 (0)
What's this?

__enable(p1, p2) public

Activates the trace

Return true if trace was enabled. Return false if trace was disabled.

trace.enabled?  #=> false
trace.enable    #=> false (previous state)
                #   trace is enabled
trace.enabled?  #=> true
trace.enable    #=> true (previous state)
                #   trace is still enabled

If a block is given, the trace will only be enabled within the scope of the block.

trace.enabled?
#=> false

trace.enable do
    trace.enabled?
    # only enabled for this block
end

trace.enabled?
#=> false

Note: You cannot access event hooks within the block.

trace.enable { p tp.lineno }
#=> RuntimeError: access from outside

Show source

static VALUE
tracepoint_enable_m(VALUE tpval, VALUE target, VALUE target_line)
{
    rb_tp_t *tp = tpptr(tpval);
    int previous_tracing = tp->tracing;

    if (NIL_P(target)) {
        if (!NIL_P(target_line)) {
            rb_raise(rb_eArgError, "only target_line is specified");
        }
        rb_tracepoint_enable(tpval);
    }
    else {
        rb_tracepoint_enable_for_target(tpval, target, target_line);
    }

    if (rb_block_given_p()) {
        return rb_ensure(rb_yield, Qundef,
                         previous_tracing ? rb_tracepoint_enable : rb_tracepoint_disable,
                         tpval);
    }
    else {
        return previous_tracing ? Qtrue : Qfalse;
    }
}

__enable

Related methods