cpiber / cest

Simple inheritance in C

cest

Inheritance in C.

This program, similarly to the standard preprocessor, can take a file and produce valid C syntax, providing inheritance features.

Getting started

1. Clone this repo
2. Compile and view help:

$ make
$ ./cest -h

See examples for more info.

Syntax

Currently only a single parent is supported. Support for multiple parents is planned.

Declare struct child to inherit from struct Base:

struct Child (struct Base) {
  // child members
};

Currently using any struct present in the current file and its includes is possible, as well as names from direct typedefs (i.e. typedef struct ... name;). Support for separate typedefs is planned.

The special name CEST_MACROS_HERE is used to denote the place where the casting-macros should be placed.

The macros allow type-safe casting of child-structs to their parent structs. They are of the form CEST_AS_<typename>, where <typename> can be struct_<structname> or the typedef'd name. S may be appended for the pointer version.

Integrating into the build

Since this tool is not part of the regular C-toolchain, it needs to be called separately. Using a build tool like GNU Make or CMake, the following approach can be used:

1. Instruct build tool to transform .h.in files and place them in build folder as .h
2. Setup up build folder for includes, or directly include from there