Operating system counter stores signals as flag set without counter.
So sending two signals to a process may result to one or two signal
handler invocation. Queueing signals inside Idris could give users
false sense of signals being are queue, while they are not.
In particular, test for signal could not work reliably for that
reason.
Also, practically we usually don't need have more than once signal
event.
This is follow-up to #1660. CC @mattpolzin
The 'with' type and application need to treat the parameters with the
same plicity, but the application has just always treated them as
explicit since it never looked. It's easiest just to make them all
explicit, since this isn't a user visible type. Fixes#1695.
While the discussion about how to refactor test framework is not
finished (#1654), make this change: move `rm -rf build` in the
beginning of the test. For these reasons:
* it is useful to inspect the contents of the `build` directory
especially after the test failure
* if build crashes mid-test (e.g. process killed), next run should
not be affected by the `build` directory from the previous run
* add `strerror` function
* move `getErrno` to `System.Errno`
* use `strerror` in `Show FileError`
* on node there's no access to `strerror`, so `strerror` just converts the number to string
Ideally we'd have a complete incremental build in CI, but that could be
a bit fiddly to set up at the moment (updating bootstrap code might make
it easier). This tests that the basic facilities work, though - there's
a lot can go wrong even in a small test like this, trust me, I have made
those mistakes :).
This involves making 'unelab' aware of nested names so that it can
remove the parameters from names in the current block. It's a bit of a
hacky solution, but it is also the easiest one.
Ideally we'd build the getter types directly, rather than using unelab,
but that's one to save for another time.
Fixes#1482
Convert `App.Control.Exception` interface to an alias to `HasErr`.
Probably `Exception` interface need to be deprecated or removed.
Note similar problem exists with `PrimIO` calling `PrimIO, Exception`,
also need to be fixed.
Fix this scenario:
```
throwBoth : Has [Exception String, Exception Int] es => App es ()
throwOne : Has [Exception Int] es => App es Int
throwOne {es} = handle {err = String} {e = es} throwBoth (\r => pure 1) (\e => pure 3)
```
With this commit it works, before this commit it failed with:
```
Error: While processing right hand side of throwOne. Can't find an implementation for Exception Int (String :: es).
TestException.idr:8:48--8:57
|
8 | throwOne {es} = handle {err = String} {e = es} throwBoth (\r => pure 1) (\e => pure 3)
| ^^^^^^^^^
```
Pragma once is supported by all compilers for the last ten years.
Better use it instead of include guards (which use different styles
in different files).
