
module std.switcherr;

import std.stdio;
import std.c.stdio;

class SwitchError : Error
{
  private:

    uint linnum;
    char[] filename;

    this(char[] filename, uint linnum)
    {
        this.linnum = linnum;
        this.filename = filename;

        char[] buffer = new char[17 + filename.length + linnum.sizeof * 3 + 1];
        int len = sprintf(buffer.ptr, "Switch Default %.*s(%u)", filename.length, filename.ptr, linnum);
        super(buffer[0..len]);
    }


  public:

    /***************************************
     * If nobody catches the Assert, this winds up
     * getting called by the startup code.
     */

    void print()
    {
        printf("Switch Default %s(%u)\n", cast(char *)filename, linnum);
    }
}

/********************************************
 * Called by the compiler generated module assert function.
 * Builds an Assert exception and throws it.
 */

extern (C) static void _d_switch_error(char[] filename, uint line)
{
    //printf("_d_switch_error(%.*s, %d)\n", filename.length, filename.ptr, line);
    SwitchError a = new SwitchError(filename, line);
    //printf("assertion %p created\n", a);
    throw a;
}
