Converting (casting?) a dynamic array to a fixed array?

[WhatMeWorry via Digitalmars-d-learn]

This following code works fine. A triangle is displayed.
        GLfloat[6] verts = [  0.0,  1.0,
                             -1.0, -1.0,
                              1.0, -1.0 ];

        glGenBuffers(1, &vbo);
        glBindBuffer(GL_ARRAY_BUFFER, vbo);  //   Some of the 
types are:

        glBufferData(GL_ARRAY_BUFFER, verts.sizeof, &verts, 
GL_STATIC_DRAW);



Then, all I do is take out the 6 so that the static array becomes 
a dynamic one. It compiles fine.

         GLfloat[] verts = [  0.0,  1.0,
                             -1.0, -1.0,
                              1.0, -1.0 ];

However, when I run it, the triangle disappears.

According to OpenGL, glBufferData shows:  void glBufferData( 
ignore, GLsizeiptr size, const GLvoid * data, ignore);

So I thought the best solution would be to simply cast the 
dynamic array to a pointer?

So I tried:
glBufferData(GL_ARRAY_BUFFER, verts.sizeof, cast(const GLvoid *) 
&verts, GL_STATIC_DRAW);
and
glBufferData(GL_ARRAY_BUFFER, verts.sizeof, cast(const GLvoid *) 
verts, GL_STATIC_DRAW);
and
glBufferData(GL_ARRAY_BUFFER, verts.sizeof, verts.ptr, 
GL_STATIC_DRAW);
and
glBufferData(GL_ARRAY_BUFFER, verts.sizeof, cast(const GLvoid *) 
verts.ptr, GL_STATIC_DRAW);
and
nothing but more blank screens.

Any ideas?  Thanks.