Nested delimiters that consistently grow regardless of the contents
Description
This package defines the command \perfectcut#1#2 which displays
a bracket <#1||#2>. Various other delimiters are similarly
defined (parentheses, square brackets ...). The effect of these
commands is to let the delimiters grow according to the number
of nested \perfectcommands (regardless of the size of the
contents). The package was originally intended for solving a
notational issue for direct-style continuation calculi in proof
theory. For general use, the package also defines commands for
defining other sorts of delimiters which will behave in the
same way (see example in the documentation). The package also
offers a robust reimplementation of \big, \bigg, etc.
