Yggdrasil Generative Grammar

Yggdrasil grammar DSL for tree-sitter

Features

Language Tutorial

• basic syntax

• class vs union

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

// expand `A | B` as class
class TestA {
    | tag_a:A 
    | tag_b:B
}
// expand `A | B` as union
union TestB {
    | A #BranchA
    | B #BranchB
}

struct TestA {
    tag_a: A,
    tag_b: B,
}

enum TestB {
    BranchA(A),
    BranchB(B),
}

• examples

You can learn more from examples.