Try to read an argument for a command-line option.

Start a preprocessor conditional, with an initial enable/disable state.

Create a macro

Is the given token type one that is used to "close" a balanced construct.

Check whether the current token on the given input stream should be treated as a macro invocation, and if so set up state for expanding that macro.

Parse a complete (infix) preprocessor expression, and return its value

Skip a singel balanced token, which is either a single token in the common case, or a matched pair of tokens for `()`, `[]`, and `{}`

Skip balanced

The `std140` rules require that a `struct` type be alinged to at least 16.

Destroy a preprocessor conditional.

Destroy an input stream

finalize a preprocessor and free any memory still in use

The `std140` rules require that all array elements be a multiple of 16 bytes.

UniformOrBuffer - 0: none; 1: uniform; 2: buffer

Determine the precedence level of an infix operator for use in parsing preprocessor conditionals.