Reduce warnings in Nim 1.0.2; Fix #16

serialization/object_serialization.nim

@@ -76,7 +76,6 @@ macro enumAllSerializedFieldsImpl(T: type, body: untyped): untyped =
   var typeImpl: NimNode
   let isSymbol = not typeAst.isTuple
 
-
   if not isSymbol:
     typeImpl = typeAst
   else:
@@ -100,10 +99,10 @@ macro enumAllSerializedFieldsImpl(T: type, body: untyped): untyped =
     let fieldNameVarTemplate =
       if isSymbol:
         quote:
-          template `fieldNameVar`: auto = `fieldName`
+          template `fieldNameVar`: auto {.used.} = `fieldName`
       else:
         quote:
-          template `fieldNameVar`: auto = $`fieldIndex`
+          template `fieldNameVar`: auto {.used.} = $`fieldIndex`
           # we can't access .Fieldn, so our helper knows
           # to parseInt this
 
@@ -116,12 +115,12 @@ macro enumAllSerializedFieldsImpl(T: type, body: untyped): untyped =
     result.add quote do:
       block:
         `fieldNameVarTemplate`
-        template fieldCaseDiscriminator: auto = `discriminator`
-        template fieldCaseBranches: auto = `branches`
+        template fieldCaseDiscriminator: auto {.used.} = `discriminator`
+        template fieldCaseBranches: auto {.used.} = `branches`
 
         # type `fieldTypeVar` = `fieldType`
         # TODO: This is a work-around for a classic Nim issue:
-        type `FieldTypeSym` = type(`field`)
+        type `FieldTypeSym` {.used.} = type(`field`)
         `body`
     
     i += 1
@@ -180,7 +179,7 @@ proc makeFieldReadersTable(RecordType, Reader: distinct type):
   enumAllSerializedFields(RecordType):
     proc readField(obj: var RecordType, reader: var Reader) {.gcsafe, nimcall.} =
       when RecordType is tuple:
-        const i = fieldName.parseInt  
+        const i = fieldName.parseInt
       try:
 
         type F = FieldTag[RecordType, fieldName, type(FieldType)]
@@ -270,11 +269,11 @@ macro setSerializedFields*(T: typedesc, fields: varargs[untyped]): untyped =
                               fieldTypeVar, typ, field,
                               body) =
           block:
-            const fieldNameVar = fieldName
-            type fieldTypeVar = type(default(typ).field)
+            const fieldNameVar {.used.} = fieldName
+            type fieldTypeVar {.used.} = type(default(typ).field)
 
-            template fieldCaseDiscriminator: auto = ""
-            template fieldCaseBranches: auto = nil
+            template fieldCaseDiscriminator: auto {.used.} = ""
+            template fieldCaseBranches: auto {.used.} = nil
 
             body
 

serialization/testing/generic_suite.nim

@@ -67,7 +67,7 @@ type
     data*: seq[int]
 
   AnonTuple* = (int, string, float64)
-  
+
   AbcTuple* = tuple[a: int, b: string, c: float64]
   XyzTuple* = tuple[x: int, y: string, z: float64]
 
@@ -127,6 +127,10 @@ template roundtripChecks*(Format: type, value: auto, expectedResult: auto) =
   except SerializationError as err:
     checkpoint "(serialization error): " & err.formatMsg("(encoded value)")
     fail()
+  except:
+    when compiles($value):
+      checkpoint "unexpected failure in roundtrip test for " & $value
+    raise
 
 template roundtripTest*(Format: type, value: auto, expectedResult: auto) =
   mixin `==`
@@ -141,12 +145,6 @@ template roundtripChecks*(Format: type, value: auto) =
   roundtripChecks(Format, value, NoExpectedResult(0))
 
 proc executeRoundtripTests*(Format: type) =
-  mixin init, ReaderType, WriterType
-
-  type
-    Reader = ReaderType Format
-    Writer = WriterType Format
-
   template roundtrip(val: untyped) =
     mixin supports
     # TODO:
@@ -160,18 +158,20 @@ proc executeRoundtripTests*(Format: type) =
       template intTests(T: untyped) =
         roundtrip low(T)
         roundtrip high(T)
-        for i in 0..1000:
-          roundtrip rand(low(T)..high(T))
+        when false:
+          # TODO:
+          # rand(low..high) produces an overflow error in Nim 1.0.2
+          for i in 0..1000:
+            roundtrip rand(low(T)..(high(T) div 2))
 
-      when false:
-        intTests int8
-        intTests int16
-        intTests int32
-        intTests int64
-        intTests uint8
-        intTests uint16
-        intTests uint32
-        intTests uint64
+      intTests int8
+      intTests int16
+      intTests int32
+      intTests int64
+      intTests uint8
+      intTests uint16
+      intTests uint32
+      intTests uint64
 
       roundtrip ""
       roundtrip "a"
@@ -257,8 +257,8 @@ proc executeRoundtripTests*(Format: type) =
       roundtrip t3
 
     test "sets":
-      var s1 = toSet([1, 2, 3, 1, 4, 2])
-      var s2 = HoldsSet(a: 100, s: toSet(["a", "b", "c"]))
+      var s1 = toHashSet([1, 2, 3, 1, 4, 2])
+      var s2 = HoldsSet(a: 100, s: toHashSet(["a", "b", "c"]))
 
       roundtrip s1
       roundtrip s2
@@ -274,7 +274,6 @@ proc executeReaderWriterTests*(Format: type) =
 
   type
     Reader = ReaderType Format
-    Writer = WriterType Format
 
   suite(typetraits.name(Format) & " read/write tests"):
     test "Low-level field reader test":