0.9.9/api/a00299_source.html

 #pragma once
 #include "../detail/setup.hpp"
 #include "../detail/type_vec4.hpp"

 namespace glm
 {

     typedef vec<4, double, highp>       highp_dvec4;

     typedef vec<4, double, mediump>     mediump_dvec4;

     typedef vec<4, double, lowp>        lowp_dvec4;

 }//namespace glm
glm::highp_dvec4
vec< 4, double, highp > highp_dvec4
4 components vector of high double-qualifier floating-point numbers.
Definition: vector_double4_precision.hpp:18

glm::mediump_dvec4
vec< 4, double, mediump > mediump_dvec4
4 components vector of medium double-qualifier floating-point numbers.
Definition: vector_double4_precision.hpp:25

glm
Definition: common.hpp:20

glm::lowp_dvec4
vec< 4, double, lowp > lowp_dvec4
4 components vector of low double-qualifier floating-point numbers.
Definition: vector_double4_precision.hpp:32