metac: A table-driven preprocessor for C

Overview

metac is my attempt at a C preprocessor that adds the features I would like C to have. It is inspired by Ryan Fleury's article, see resources below.

Features

• @table keyword for specifying data, eg.

@table(name, str) MyEnumTable
{
    { A "A" }
    { B "B" }
    { C "C" }
}

• @expand keyword for using data from a table, eg.

typedef enum
{
@expand(MyEnumTable t)
`    MyEnum_$a(a.name),`
    MyEnum_Count
} MyEnum;

Build

Run the build script.

./source/build.sh

Try it out

To chek the usage you can run withuot arguments.

./build/metac
Usage: ./build/metac filename [output_filename]

Run the program on the example file.

./build/metac examples/table.c

Checkout the newly created table.meta.c. This is your metaprogram!

Resources

• Ryan Fleury - table-driven code generation