diff options
Diffstat (limited to 'src/utils/nat.ts')
| -rw-r--r-- | src/utils/nat.ts | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/utils/nat.ts b/src/utils/nat.ts new file mode 100644 index 0000000..af8f3da --- /dev/null +++ b/src/utils/nat.ts @@ -0,0 +1,10 @@ +import { Op } from './theorem'; + +export type Add<A extends Op, B extends Op> = { op: '+'; a: A; b: B }; +export type Multiply<A extends Op, B extends Op> = { op: '*'; a: A; b: B }; +export type Succ<A extends Op> = { op: 'succ', a: A }; + +export type _0 = '0' +export type _1 = Succ<_0> +export type _2 = Succ<_1> +export type _3 = Succ<_2> |