name: duk_opt_pointer

proto: |
  void *duk_opt_pointer(duk_context *ctx, duk_idx_t idx, void *def_value);

stack: |
  [ ... val! ... ]

summary: |
  <p>Get the pointer value at <code>idx</code> as <code>void *</code> without
  modifying or coercing the value.  If the value is <code>undefined</code> or
  the index is invalid, <code>def_value</code> default value is returned.
  In other cases (<code>null</code> or non-matching type) throws an error.</p>

example: |
  void *ptr;

  ptr = duk_opt_pointer(ctx, -3, (void *) 0x12345678);
  printf("my pointer is: %p\n", ptr);

tags:
  - stack

introduced: 2.1.0