Thread: Initializing an array of char pointers directly

I'm learning OpenGL using the C API and some of the functions' argument types have proven a bit challenging to me.

One example is the function

Code:

glShaderSource(GLuint shader, GLsizei count, GLchar const** string, GLint const* length);

It resides in foo() which receives a vector "data" from elsewhere

Code:

void foo(std::vector<std::pair<GLenum, GLchar const*>> const& data);

To pass the pair's second element to glShaderSource's third argument, I do the following:

Code:

GLchar const* const source[] = {data[0].second};
glShaderSource(..., ..., source, ...);

Now I have two questions regarding this:

1. Can I initialize a char const** via initialization list, the way I do a char const*?

Code:

// this works
std::vector<std::pair<GLenum, GLchar const*>> const shader_sources = {
    {GL_VERTEX_SHADER, "sourcecode"},
    {GL_FRAGMENT_SHADER, "sourcecode"}
};

// but is this possible?
std::vector<std::pair<GLenum, GLchar const**>> = { ??? };

2. Is there an alternative to creating a temporary GLchar**, even though that's specifically what the function wants?

Well, you could just take the address of your data[0].second.
It will work because the shader text is not needed after it is compiled.

This is what I did:
https://github.com/manasij7479/gl/bl...ork/shader.cpp