PLib

plib (short for parser library) is a collection of multiple modules, which includes a parser generator and parsers generated by it.

plib takes a pre-generated ABNF structure as input to produce a parser.
parser will take raw text as input to generate the AST of it.

NOTE Contribution is much welcomed, but beware that currently this is just a personal project for fun.

WARNING Lack of comments and documents. You need to dig into the bare code to use and knew the logic behind the library.

Modules

• plib
  core module, parser generator
• abnf
  abnf file parser/serializer, ABNF structure generator, generate itself
• toml
  toml file parser/serializer, follow toml v1.0.0, passed all toml-test tests

How To

Generate ABNF

Use following command to generate the ABNF structure that defines ABNF syntax.

zig build -Dstep=gen_abnf -Dname=file_name

This command runs gen_abnf.zig, takes src/raw/<file_name>.abnf and outputs src/gen/<file_name>.zig.

Test Module

Use following command to test module.

zig build -Dstep=test -Dname=mod_name

toml-test

To test the toml module against toml-test, first make sure toml-test is on your PATH, then

zig build -Dstep=toml_test

Currently all tests is passed.

toml-test v2024-05-31 [C:\repo\repo.zig\plib\zig-out\bin\toml_encoder.exe]: using embedded tests
encoder tests: 182 passed,  0 failed
toml-test v2024-05-31 [C:\repo\repo.zig\plib\zig-out\bin\toml_decoder.exe]: using embedded tests
  valid tests: 182 passed,  0 failed
invalid tests: 371 passed,  0 failed

Add New Parser

Suppose you want to add a json parser (maybe not since it's included in std lib). You should:

1. Add src/raw/json.abnf, which contains json's abnf definition.
2. Run zig build -Dstep=gen_abnf -Dname=json to generate src/gen/json.zig.
3. Modify zig.build (and zig.build.zong if so desired) to build a json module.
4. Add src/mod/json/root.zig, which is the root source file of json module. See src/mod/toml/root.zig for example.
5. If you are using vscode, you might also want to modify .vscode/tasks.json.

Use As Dependency

In your build.zig.zon add:

  .dependencies = .{
    .plib = .{
      .url = "https://github.com/Luna1996/abnf/archive/main.tar.gz",
    },
  },

In your build.zig add:

const plib_dep = b.dependency("plib", .{.toml = true});
const plib_mod = plib_dep.module("plib");
const toml_mod = plib_dep.module("toml");
main_mod.addImport("plib", plib);
main_mod.addImport("plib", toml);

In your project add:

const plib = @import("plib");
const toml = @import("toml");