Implement switch-statements

[skx]

I want to allow this to succeed:

function test( name ) {
  switch( name ) {
    case /^steve$/i {
       printf("I'm a regexp\n");
    }
    case "Steven" {
	printf("I know you!\n" );
    }
    default {
	printf("I don't know who you are\n" );
    }
  }
}

test( "Steve" );    // Regexp match
test( "Steven" );   // Literal match
test( "Bob" );      // Unhandled case

NOTE: I explicitly use blocks here, because fall-throughs are evil :)