Look up generic parameters when found inside semOverloadedCall, fixin… (#23054)

…g static procs

---------

Co-authored-by: Andreas Rumpf <rumpf_a@web.de>
(cherry picked from commit 8cc3c774c8)

compiler/semcall.nim

@@ -49,6 +49,19 @@ proc initCandidateSymbols(c: PContext, headSymbol: PNode,
   while symx != nil:
     if symx.kind in filter:
       result.add((symx, o.lastOverloadScope))
+    elif symx.kind == skGenericParam:
+      #[
+        This code handles looking up a generic parameter when it's a static callable.
+        For instance:
+          proc name[T: static proc()]() = T()
+          name[proc() = echo"hello"]()
+      ]#
+      for paramSym in searchInScopesAllCandidatesFilterBy(c, symx.name, {skConst}):
+        let paramTyp = paramSym.typ
+        if paramTyp.n.sym.kind in filter:
+          result.add((paramTyp.n.sym, o.lastOverloadScope))
+
+
     symx = nextOverloadIter(o, c, headSymbol)
   if result.len > 0:
     initCandidate(c, best, result[0].s, initialBinding,

tests/statictypes/tstaticprocparams.nim

@@ -0,0 +1,9 @@
+proc consumer[T: static proc(i: int): int{.nimcall.}](i: int): int = T(i)
+proc addIt(i: int): int = i + i
+proc squareIt(i: int): int = i * i
+
+assert consumer[addIt](10) == 20
+assert consumer[squareIt](30) == 900
+assert consumer[proc(i: int): int{.nimcall.} = i * i + i](10) == 110
+
+