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Specify Logic Resource. #266

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merged 4 commits into from
Jul 13, 2023
Merged

Specify Logic Resource. #266

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a4d8e32
Specify Logic Resource.
cqc-alec Jul 12, 2023
c1e3a0f
Merge branch 'main' into logic
cqc-alec Jul 12, 2023
05d11bc
Allow N-ary "and" and "or" (encompassing const); remove xor.
cqc-alec Jul 13, 2023
0ae2c7a
Merge branch 'main' into logic
cqc-alec Jul 13, 2023
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18 changes: 18 additions & 0 deletions specification/hugr.md
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Expand Up @@ -1675,6 +1675,24 @@ implementation of this design document is available on GitHub.
`panic`: panics unconditionally; no inputs, any type of outputs (these
are never produced)

### Logic Resource

The Logic Resource provides a boolean type and basic logical operations.

The boolean type `bool` is defined to be `Sum((),())`, with the convention that the
first option in the sum represents "false" and the second represents "true".

The following operations are defined:

| Name | Inputs | Outputs | Meaning |
| -------- | ---------- | ------- | ----------------------------- |
| `not` | `bool` | `bool` | logical "not" |
| `and<N>` | `bool` x N | `bool` | N-ary logical "and" (N \>= 0) |
| `or<N>` | `bool` x N | `bool` | N-ary logical "or" (N \>= 0) |

Note that an `and<0>` operation produces the constant value "true" and an
`or<0>` operation produces the constant value "false".

### Arithmetic Resource

The Arithmetic Resource provides types and operations for integer and
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