/[()\[\]{}]/
{
	parens = parens + match( $0, @(@ );
	parens = parens - match( $0, @)@ );
	bracks = bracks + match( $0, @[@ );
	bracks = bracks - match( $0, @]@ );
	braces = braces + match( $0, @{@ );
	braces = braces - match( $0, @}@ );
}
END
{
	printf("parens=%d, brackets=%d, braces=%d\n", parens, bracks, braces );
}
