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      1 ((function sign
      2    (signature float
      3      (parameters
      4        (declare (in) float x))
      5      ((return (expression float sign (var_ref x)))))
      6 
      7    (signature vec2
      8      (parameters
      9        (declare (in) vec2 x))
     10      ((return (expression vec2 sign (var_ref x)))))
     11 
     12    (signature vec3
     13      (parameters
     14        (declare (in) vec3 x))
     15      ((return (expression vec3 sign (var_ref x)))))
     16 
     17    (signature vec4
     18      (parameters
     19        (declare (in) vec4 x))
     20      ((return (expression vec4 sign (var_ref x)))))
     21 
     22    (signature int
     23      (parameters
     24        (declare (in) int x))
     25      ((return (expression int sign (var_ref x)))))
     26 
     27    (signature ivec2
     28      (parameters
     29        (declare (in) ivec2 x))
     30      ((return (expression ivec2 sign (var_ref x)))))
     31 
     32    (signature ivec3
     33      (parameters
     34        (declare (in) ivec3 x))
     35      ((return (expression ivec3 sign (var_ref x)))))
     36 
     37    (signature ivec4
     38      (parameters
     39        (declare (in) ivec4 x))
     40      ((return (expression ivec4 sign (var_ref x)))))
     41 ))
     42 
     43