Method: Binding#local_variable_set

Defined in:

proc.c

#local_variable_set(symbol, obj) ⇒ Object

Set local variable named symbol as obj.

def foo a = 1 bind = binding bind.local_variable_set(:a, 2) # set existing local variable ‘a’ bind.local_variable_set(:b, 3) # create new local variable ‘b’ # ‘b’ exists only in binding

p bind.local_variable_get(:a) #=> 2 p bind.local_variable_get(:b) #=> 3 p a #=> 2 p b #=> NameError end

This method behaves similarly to the following code:

binding.eval("#{symbol} = #{obj}")

if obj can be dumped in Ruby code.

Returns:

• (Object)

# File 'proc.c', line 572

static VALUE
bind_local_variable_set(VALUE bindval, VALUE sym, VALUE val)
{
    ID lid = check_local_id(bindval, &sym);
    rb_binding_t *bind;
    const VALUE *ptr;
    const rb_env_t *env;

    if (!lid) lid = rb_intern_str(sym);

    GetBindingPtr(bindval, bind);
    env = VM_ENV_ENVVAL_PTR(vm_block_ep(&bind->block));
    if ((ptr = get_local_variable_ptr(&env, lid)) == NULL) {
        /* not found. create new env */
        ptr = rb_binding_add_dynavars(bindval, bind, 1, &lid);
        env = VM_ENV_ENVVAL_PTR(vm_block_ep(&bind->block));
    }

#if YJIT_STATS
    rb_yjit_collect_binding_set();
#endif

    RB_OBJ_WRITE(env, ptr, val);

    return val;
}