Merge branch 'devel' of github.com:Araq/Nimrod into devel

lib/pure/collections/tables.nim

@@ -246,7 +246,8 @@ template equalsImpl() =
     # different insertion orders mean different 'data' seqs, so we have
     # to use the slow route here:
     for key, val in s:
-      if not hasKey(t, key): return false
+      # prefix notation leads to automatic dereference in case of PTable
+      if not t.hasKey(key): return false
       if t[key] != val: return false
     return true
   
@@ -332,7 +333,9 @@ proc `$`*[A, B](t: PTable[A, B]): string =
   dollarImpl()
 
 proc `==`*[A, B](s, t: PTable[A, B]): bool =
-  equalsImpl()
+  if isNil(s): result = isNil(t)
+  elif isNil(t): result = false
+  else: result = equalsImpl()
 
 proc newTableFrom*[A, B, C](collection: A, index: proc(x: B): C): PTable[C, B] =
   ## Index the collection with the proc provided.

lib/pure/json.nim

@@ -621,9 +621,13 @@ proc `%`*(elements: openArray[PJsonNode]): PJsonNode =
 
 proc `==`* (a,b: PJsonNode): bool =
   ## Check two nodes for equality
-  if a.kind != b.kind: false
+  if a.isNil:
+    if b.isNil: return true
+    return false
+  elif b.isNil or a.kind != b.kind: 
+    return false
   else:
-    case a.kind
+    return case a.kind
     of JString:
       a.str == b.str
     of JInt:

lib/pure/osproc.nim

@@ -763,7 +763,7 @@ elif not defined(useNimRtl):
     discard write(data.pErrorPipe[writeIdx], addr error, sizeof(error))
     exitnow(1)
 
-  when defined(macosx):
+  when defined(macosx) or defined(freebsd):
     var environ {.importc.}: cstringArray
 
   proc startProcessAfterFork(data: ptr TStartProcessData) =
@@ -793,7 +793,7 @@ elif not defined(useNimRtl):
     discard fcntl(data.pErrorPipe[writeIdx], F_SETFD, FD_CLOEXEC)
 
     if data.optionPoUsePath:
-      when defined(macosx):
+      when defined(macosx) or defined(freebsd):
         # MacOSX doesn't have execvpe, so we need workaround.
         # On MacOSX we can arrive here only from fork, so this is safe:
         environ = data.sysEnv