1((function noise1
2   (signature float
3     (parameters
4       (declare (in) float x))
5     ((return (expression float noise (var_ref x)))))
6   (signature float
7     (parameters
8       (declare (in) vec2 x))
9     ((return (expression float noise (var_ref x)))))
10   (signature float
11     (parameters
12       (declare (in) vec3 x))
13     ((return (expression float noise (var_ref x)))))
14   (signature float
15     (parameters
16       (declare (in) vec4 x))
17     ((return (expression float noise (var_ref x)))))
18))
19