https://github.com/ygg-lang/yggdrasil.rs

yggdrasil compiler with rust runtime
https://github.com/ygg-lang/yggdrasil.rs

codegen compiler highlighter interpreter lexer parser parser-combinators parser-generator peg

Last synced: 3 months ago
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yggdrasil compiler with rust runtime

• Host: GitHub
• URL: https://github.com/ygg-lang/yggdrasil.rs
• Owner: ygg-lang
• License: mpl-2.0
• Created: 2021-10-04T13:37:27.000Z (about 3 years ago)
• Default Branch: master
• Last Pushed: 2024-03-28T16:40:09.000Z (7 months ago)
• Last Synced: 2024-05-29T02:16:21.630Z (5 months ago)
• Topics: codegen, compiler, highlighter, interpreter, lexer, parser, parser-combinators, parser-generator, peg
• Language: Rust
• Homepage: https://docs.rs/yggdrasil-rt/latest/yggdrasil_rt/
• Size: 2.63 MB
• Stars: 21
• Watchers: 1
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: Readme.md
  • License: License.md

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README

        
# Yggdrasil Generative Grammar

## Features

## Language Tutorial

- basic syntax

|    Name    | Description                  |

|:----------:|------------------------------|

|    `a?`    | Optional element             |

|    `a*`    | Zero or more elements        |

|    `a+`    | One or more elements         |

|   `a b`    | Sequence of elements         |

|  `a \| b`  | Alternative of branch        |

|  `name:e`  | Mark element with given name |

|  `#Name`   | Mark branch with given name  |      

|  `^rule`   | Remark element               |

| `@macro()` | Macro call                   |        

|   `ANY`    | Any unicode characters       |

| `IGNORED`  | All rules marked as ignored  |

- `class` vs `union`

The same syntax `A | B` performs differently in `class` and `union` context.

```yggdrasil

// expand `A | B` as class

class TestA {

    | tag_a:A 

    | tag_b:B

}

// expand `A | B` as union

union TestB {

    | A #BranchA

    | B #BranchB

}

```

```rust

struct TestA {

    tag_a: A,

    tag_b: B,

}

enum TestB {

    BranchA(A),

    BranchB(B),

}

```

- examples

You can learn more from [project-yggdrasil](https://github.com/ygg-lang/project-yggdrasil/tree/master/languages).

## Tools

- [JetBrains Support](https://plugins.jetbrains.com/plugin/20594-yggdrasil-support)