uniform setter thing

foo.cpp

class Uniform
{
public:
    // todo: macroify, make m_program actually a thing.
    void set_uniform_float(std::string key, float data)
    {
        using namespace std;
        unsigned location = 0;
        map<string, unsigned>::iterator it;

        it = m_uniforms.find(key);
        if (it == m_uniforms.end())
            m_uniforms[key] = glGetUniformLocation(m_program, key.c_str());
        glUniform1f(location, data);
    }
private:
    std::map<std::string, unsigned> m_uniforms;
    unsigned m_program;
};