Symbol constructor

src/preserves.nim

@@ -37,10 +37,14 @@ type
     of pkEmbedded:
       embedded*: T
 
-proc label*[T](prs: Preserve[T]): Preserve[T] =
+proc symbol*[T](s: string): Preserve[void] {.inline.} =
+  ## Symbol constructor.
+  Preserve[T](kind: pkSymbol, symbol: s)
+
+proc label*[T](prs: Preserve[T]): Preserve[T] {.inline.} =
   prs.record[0]
 
-proc fields*[T](prs: Preserve[T]): seq[Preserve[T]] =
+proc fields*[T](prs: Preserve[T]): seq[Preserve[T]] {.inline.} =
   prs.record[1..prs.record.high]
 
 iterator fields*[T](prs: Preserve[T]): seq[Preserve[T]] =
@@ -365,9 +369,8 @@ proc parsePreserve*(s: Stream): Preserve[void] =
     let len = s.readVarint()
     result.bytes = cast[seq[byte]](s.readStr(len))
   of 0xb3:
-    result = Preserve[void](kind: pkSymbol)
     let len = s.readVarint()
-    result.symbol = s.readStr(len)
+    result = symbol[void](s.readStr(len))
   of 0xb4:
     result = Preserve[void](kind: pkRecord)
     while s.peekUint8() != endMarker:
@@ -447,10 +450,10 @@ proc toPreserve*(js: JsonNode): Preserve[void] =
     result = Preserve[void](kind: pkDouble, double: js.fnum)
   of JBool:
     result = case js.bval
-      of false: Preserve[void](kind: pkSymbol, symbol: "false")
-      of true: Preserve[void](kind: pkSymbol, symbol: "true")
+      of false: symbol[void]"false"
+      of true: symbol[void]"true"
   of JNull:
-    result = Preserve[void](kind: pkSymbol, symbol: "null")
+    result = symbol[void]"null"
   of JObject:
     result = Preserve[void](kind: pkDictionary)
     for key, val in js.fields.pairs: