refactor cmpNimIdentifier (#16611)

* refactor cmpNimIdentifier

* Apply suggestions from code review

Co-authored-by: Clyybber <darkmine956@gmail.com>

Co-authored-by: Clyybber <darkmine956@gmail.com>

lib/core/macros.nim

@@ -1437,12 +1437,9 @@ when defined(nimVmEqIdent):
     ## these nodes will be unwrapped.
 
 else:
-  from std/private/strimpl import cmpIgnoreStyleImpl
-  # this procedure is optimized for native code, it should not be compiled to nimVM bytecode.
-  proc cmpIgnoreStyle(a, b: cstring): int {.noSideEffect.} =
-    cmpIgnoreStyleImpl(a, b, true)
+  from std/private/strimpl import cmpNimIdentifier
 
-  proc eqIdent*(a, b: string): bool = cmpIgnoreStyle(a, b) == 0
+  proc eqIdent*(a, b: string): bool = cmpNimIdentifier(a, b) == 0
     ## Check if two idents are equal.
 
   proc eqIdent*(node: NimNode; s: string): bool {.compileTime.} =

lib/core/typeinfo.nim

@@ -91,7 +91,7 @@ when not defined(gcDestructors):
 else:
   include system/seqs_v2_reimpl
 
-from std/private/strimpl import cmpIgnoreStyleImpl
+from std/private/strimpl import cmpNimIdentifier
 
 when not defined(js):
   template rawType(x: Any): PNimType =
@@ -368,9 +368,6 @@ iterator fields*(x: Any): tuple[name: string, any: Any] =
   for name, any in items(ret):
     yield ($name, any)
 
-proc cmpNimIdentifier(a, b: cstring): int {.noSideEffect.} =
-  cmpIgnoreStyleImpl(a, b, true)
-
 proc getFieldNode(p: pointer, n: ptr TNimNode,
                   name: cstring): ptr TNimNode =
   case n.kind

lib/std/private/strimpl.nim

@@ -70,3 +70,7 @@ template endsWithImpl*[T: string | cstring](s, suffix: T) =
     if s[i+j] != suffix[i]: return false
     inc(i)
   if i >= suffixLen: return true
+
+
+func cmpNimIdentifier*[T: string | cstring](a, b: T): int =
+  cmpIgnoreStyleImpl(a, b, true)