Crate cpprs

Example

Build

You probably want the following in your build.rs:

use cpprs::{walk_src_preprocess, CCompiler};

fn main() {
    walk_src_preprocess(CCompiler::GCC, vec![])
}

This will pre-process any .cpprs source files in src/ using GCC.

Code

Suppose you have the following in src/lib.cpprs:

#include <minilzo.h>

pub enum LzoError {
    LzoOk = LZO_E_OK,
    LzoError = LZO_E_ERROR,
    LzoOutOfMemory = LZO_E_OUT_OF_MEMORY,
    LzoNotCompressible = LZO_E_NOT_COMPRESSIBLE,
    LzoInputOverrun = LZO_E_INPUT_OVERRUN,
    LzoOutputOverrun = LZO_E_OUTPUT_OVERRUN,
    LzoLookbehindOverrun = LZO_E_LOOKBEHIND_OVERRUN,
    LzoEofNotFound = LZO_E_EOF_NOT_FOUND,
    LzoInputNotConsumed = LZO_E_INPUT_NOT_CONSUMED,
    LzoNotYetImplemented = LZO_E_NOT_YET_IMPLEMENTED,
    LzoInvalidArgument = LZO_E_INVALID_ARGUMENT,
    LzoInvalidAlignment = LZO_E_INVALID_ALIGNMENT,
    LzoOutputNotConsumed = LZO_E_OUTPUT_NOT_CONSUMED,
    LzoInternalError = LZO_E_INTERNAL_ERROR,
}

Then this will be placed in src/lib.rs:

pub enum LzoError {
    LzoOk = 0,
    LzoError = (-1),
    LzoOutOfMemory = (-2),
    LzoNotCompressible = (-3),
    LzoInputOverrun = (-4),
    LzoOutputOverrun = (-5),
    LzoLookbehindOverrun = (-6),
    LzoEofNotFound = (-7),
    LzoInputNotConsumed = (-8),
    LzoNotYetImplemented = (-9),
    LzoInvalidArgument = (-10),
    LzoInvalidAlignment = (-11),
    LzoOutputNotConsumed = (-12),
    LzoInternalError = (-99),
}

i.e. the macros will be filled in.

Enums

CCompiler

Functions

pp_cc

Preprocess using one of the known CCompilers

pp_cpphs

Preprocess using cpphs.

walk_preprocess

Preprocess all .cpprs files in a given directory.

walk_preprocess_general

Preprocess all .cpprs files encountered by a WalkDir

walk_src_preprocess

Preprocess all .cpprs files in the src directory