Add parseEnum support for triple quoted string and raw string enum values (#25401)

(cherry picked from commit ae8a1739f8)

lib/std/enumutils.nim

@@ -47,7 +47,7 @@ macro genEnumCaseStmt*(typ: typedesc, argSym: typed, default: typed,
     of nnkEnumFieldDef:
       fVal = f[0].strVal
       case f[1].kind
-      of nnkStrLit:
+      of nnkStrLit .. nnkTripleStrLit:
         fStr = f[1].strVal
       of nnkTupleConstr:
         fStr = f[1][1].strVal
@@ -57,7 +57,7 @@ macro genEnumCaseStmt*(typ: typedesc, argSym: typed, default: typed,
         fNum = f[1].intVal
       else:
         let fAst = f[0].getImpl
-        if fAst.kind == nnkStrLit:
+        if fAst.kind in {nnkStrLit .. nnkTripleStrLit}:
           fStr = fAst.strVal
         else:
           error("Invalid tuple syntax!", f[1])

tests/stdlib/tstrutils.nim

@@ -642,6 +642,30 @@ template main() =
       let myA = CAMPAIGN_TABLE
       doAssert $parseEnum[Tables](myA) == "wikientries_campaign"
 
+    block:
+      const tripleQuotedStr = """foobar"""
+
+      type MyEnum = enum
+        a = tripleQuotedStr
+        b = """bazquz"""
+
+      let myA = tripleQuotedStr
+      doAssert $parseEnum[MyEnum](myA) == myA
+      let myB = "bazquz"
+      doAssert $parseEnum[MyEnum](myB) == myB
+
+    block:
+      const rawStr = r"foobar"
+
+      type MyEnum = enum
+        a = rawStr
+        b = r"bazquz"
+
+      let myA = rawStr
+      doAssert $parseEnum[MyEnum](myA) == myA
+      let myB = r"bazquz"
+      doAssert $parseEnum[MyEnum](myB) == myB
+
     block: # check enum defined in block
       type
         Bar = enum