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new .redefine pragma for templates, warn on redefinition without it (#20211)

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* test CI for template redefinitions

* adapt asyncmacro

* fix quote

* fix again

* try something else

* revert

* fix ioselectors_select, disable packages CI

* adapt more tests & simplify

* more

* more

* more

* rename to redefine, warn on implicit redefinition

* basic documentation [skip ci]

* Update compiler/lineinfos.nim

Co-authored-by: konsumlamm <44230978+konsumlamm@users.noreply.github.com>

Co-authored-by: konsumlamm <44230978+konsumlamm@users.noreply.github.com>
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metagn 2022-08-23 22:41:30 +03:00 • committed by GitHub
commit d1d141b135
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19 changed files with 85 additions and 25 deletions
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lib/pure/asyncmacro.nim
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@ -126,7 +126,9 @@ template await*(f: typed): untyped {.used.} =
error "await expects Future[T], got " & $typeof(f)
template await*[T](f: Future[T]): auto {.used.} =
template yieldFuture = yield FutureBase()
when not defined(nimHasTemplateRedefinitionPragma):
{.pragma: redefine.}
template yieldFuture {.redefine.} = yield FutureBase()
when compiles(yieldFuture):
var internalTmpFuture: FutureBase = f