https://github.com/ziman/macro-pp

Universal macro preprocessor
https://github.com/ziman/macro-pp

Last synced: 10 months ago
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Universal macro preprocessor

• Host: GitHub
• URL: https://github.com/ziman/macro-pp
• Owner: ziman
• Created: 2018-04-04T07:27:46.000Z (about 8 years ago)
• Default Branch: master
• Last Pushed: 2018-04-17T08:14:37.000Z (about 8 years ago)
• Last Synced: 2025-03-27T02:44:06.550Z (about 1 year ago)
• Language: Haskell
• Size: 30.3 KB
• Stars: 3
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# macro-pp

Universal preprocessor

1. Write your macro matcher/parser with Parsec

2. Implement conversion of parsed macros to whatever you want

3. Non-matching portions of the input are copied verbatim

## Example

`ExamplePython.hs` defines a *mypy*-supported enum for Python.

This takes the following code...

```python

@enum(deriving=Codec)

class Model:

    PreorderMaximization(p = PreorderParams, q = bool)

    UndominatedChoice(strict = bool)

    TopTwo

    ChooseSome(models = List[Model])

    #end#

```

...and generates the following Python source.

```python

class PreorderMaximization(NamedTuple):

    p : PreorderParams

    q : bool

    tag : int = 0

    

class UndominatedChoice(NamedTuple):

    strict : bool

    tag : int = 1

    

class TopTwo(NamedTuple):

    tag : int = 2

    

class ChooseSome(NamedTuple):

    models : List[Model]

    tag : int = 3

    

Model = Union[

    PreorderMaximization,

    UndominatedChoice,

    TopTwo,

    ChooseSome,

]

ModelC = enumC('Model', {

    PreorderMaximization: (PreorderParamsC, boolC,),

    UndominatedChoice: (boolC,),

    TopTwo: (),

    ChooseSome: (listC(ModelC),),

})

```