Function print_usage

CMakeModules/glsl2cpp.cpp:19–61

typedef map<string, string> opt_t;

static
void print_usage() {
    cout << R"delimiter(GLSL2CPP
Converts OpenGL shader files to C++ headers. It is similar to bin2c and xxd but adds
support for namespaces.

| --name        | name of the variable (default: var)                               |
| --file        | input file                                                        |
| --output      | output file (If no output is specified then it prints to stdout)  |
| --type        | Type of variable (default: char)                                  |
| --namespace   | A space seperated list of namespaces                              |
| --formatted   | Tabs for formatting                                               |
| --version     | Prints my name                                                    |
| --help        | Prints usage info                                                 |

Example
-------
Command:
./glsl2cpp --file blah.txt --namespace shaders --formatted --name image_vs

Will produce the following:
#pragma once
#include <cstddef>
namespace shaders {
    static const char image_vs[] = R"shader(
#version 330

layout(location = 0) in vec3 pos;
layout(location = 1) in vec2 tex;

uniform mat4 matrix;

out vec2 texcoord;

void main() {
    texcoord = tex;
    gl_Position = matrix * vec4(pos,1.0);
}
    )shader";
}
)delimiter";
        exit(0);
}

static bool formatted;