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Apr 30, 2025
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Update egglog-translation.md #294

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6 changes: 2 additions & 4 deletions docs/reference/egglog-translation.md
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Expand Up @@ -108,13 +108,11 @@ The `function` decorator supports a number of options as well, which can be pass

- `egg_fn`: The name of the function in egglog. By default, this is the same as the Python function name.
- `cost`: The cost of the function. By default, this is 1.
- `default`: A default value for the function. This must be the same type as the return type of the function.
- `merge`: A function to merge the results of the function. This must be a function that takes two arguments of the return type, the old and the new, and returns a single value of the return type.
- `on_merge`: A function to call when the function is merged. This must be a function that takes two arguments of the return type, the old and the new, and a number of actions to take.

```{code-cell} python
# egg: (function foo () i64 :cost 10 :default 0 :merge (max old new))
@function(egg_fn="foo", default=i64(0), cost=10, merge=lambda old, new: old.max(new))
# egg: (function foo () i64 :cost 10 :merge (max old new))
@function(egg_fn="foo", cost=10, merge=lambda old, new: old.max(new))
def my_foo() -> i64:
pass
```
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