1((function trunc
2   (signature float
3     (parameters
4       (declare (in) float arg0))
5     ((return (expression float trunc (var_ref arg0)))))
6
7   (signature vec2
8     (parameters
9       (declare (in) vec2 arg0))
10     ((return (expression vec2 trunc (var_ref arg0)))))
11
12   (signature vec3
13     (parameters
14       (declare (in) vec3 arg0))
15     ((return (expression vec3 trunc (var_ref arg0)))))
16
17   (signature vec4
18     (parameters
19       (declare (in) vec4 arg0))
20     ((return (expression vec4 trunc (var_ref arg0)))))
21))
22