C preprocessor in Lua

This is a C preprocessor in Lua.

preproc.lua

This is the lua file for preprocessor class.

process a single file:

local Preproc = require 'preproc'
print(Preproc(code))

process a single file with some options:

local Preproc = require 'preproc'
print(Preproc{
	code = code,
	includeDirs = {...},
	macros = {...},
})

process multiple files:

local Preproc = require 'preproc'
local preproc = Preproc()
print(preproc{
	code = '#include <file1.h>',
	macros = ...,
	includeDirs = ...,
})
print(preproc{
	code = '#include <file2.h>',
	macros = ...,
	includeDirs = ...,
})

or modify the state as we go:

preproc:setMacros{
	KEY1 = 'value1',
	KEY2 = 'value2',
	...
}
preproc:addIncludeDir'path/too/foo/bar.h'
preproc:addIncludeDirs{
	'dir1/file1.h',
	'dir2/file2.h',
	...
}

returns an object that is cast to its .code field which contains the result. this way you can query the .macros, .alreadyIncludedFiles, etc after preprocessing

processing multiple files retains the state of .macros and .alreadyIncludedFiles.

The __call operator returns the last file processed.