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underscores for routine parameters (#21192)

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* underscores for routine parameters

fixes #13443, fixes #13804, refs #21121

* add changelog + more tests

* support generics and ensure inferred lambdas work
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metagn 2023-01-08 08:49:49 +03:00 • committed by GitHub
commit 05c6db6500
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5 changed files with 131 additions and 3 deletions
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4
compiler/semtypes.nim
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@ -1372,7 +1372,9 @@ proc semProcTypeNode(c: PContext, n, genericParams: PNode,
inc(counter)
if def != nil and def.kind != nkEmpty:
arg.ast = copyTree(def)
if containsOrIncl(check, arg.name.id):
if arg.name.s == "_":
arg.flags.incl(sfGenSym)
elif containsOrIncl(check, arg.name.id):
localError(c.config, a[j].info, "attempt to redefine: '" & arg.name.s & "'")
result.n.add newSymNode(arg)
rawAddSon(result, finalType)