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((function sign
(signature float
(parameters
(declare (in) float x))
((return (expression float sign (var_ref x)))))
(signature vec2
(parameters
(declare (in) vec2 x))
((return (expression vec2 sign (var_ref x)))))
(signature vec3
(parameters
(declare (in) vec3 x))
((return (expression vec3 sign (var_ref x)))))
(signature vec4
(parameters
(declare (in) vec4 x))
((return (expression vec4 sign (var_ref x)))))
))
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