added system.||; lacks runtime support

lib/core/macros.nim

@@ -36,7 +36,7 @@ type
     nnkMacroDef, nnkTemplateDef, nnkIteratorDef, nnkOfBranch, 
     nnkElifBranch, nnkExceptBranch, nnkElse, nnkMacroStmt, 
     nnkAsmStmt, nnkPragma, nnkPragmaBlock, nnkIfStmt, nnkWhenStmt, 
-    nnkForStmt, nnkWhileStmt, nnkCaseStmt, 
+    nnkForStmt, nnkParForStmt, nnkWhileStmt, nnkCaseStmt, 
     nnkTypeSection, nnkVarSection, nnkLetSection, nnkConstSection, 
     nnkConstDef, nnkTypeDef, 
     nnkYieldStmt, nnkTryStmt, nnkFinally, nnkRaiseStmt, 

lib/system.nim

@@ -1200,6 +1200,15 @@ iterator `..`*[S, T](a: S, b: T): T {.inline.} =
     yield res
     inc res
 
+iterator `||`*[S, T](a: S, b: T, annotation=""): T {.
+  inline, magic: "OmpParFor", sideEffect.} =
+  ## parallel loop iterator. Same as `..` but the loop may run in parallel.
+  ## `annotation` is an additional annotation for the code generator to use.
+  ## Note that the compiler maps that to
+  ## the ``#pragma omp parallel for`` construct of `OpenMP`:idx: and as
+  ## such isn't aware of the parallelism in your code. Be careful.
+  nil
+
 proc min*(x, y: int): int {.magic: "MinI", noSideEffect.}
 proc min*(x, y: int8): int8 {.magic: "MinI", noSideEffect.}
 proc min*(x, y: int16): int16 {.magic: "MinI", noSideEffect.}