new tester; all tests categorized

tests/distinct/tcurrncy.nim

@@ -0,0 +1,38 @@
+discard """
+  file: "tcurrncy.nim"
+  output: "25"
+"""
+template Additive(typ: typeDesc): stmt =
+  proc `+` *(x, y: typ): typ {.borrow.}
+  proc `-` *(x, y: typ): typ {.borrow.}
+  
+  # unary operators:
+  proc `+` *(x: typ): typ {.borrow.}
+  proc `-` *(x: typ): typ {.borrow.}
+
+template Multiplicative(typ, base: typeDesc): stmt {.immediate.} =
+  proc `*` *(x: typ, y: base): typ {.borrow.}
+  proc `*` *(x: base, y: typ): typ {.borrow.}
+  proc `div` *(x: typ, y: base): typ {.borrow.}
+  proc `mod` *(x: typ, y: base): typ {.borrow.}
+
+template Comparable(typ: typeDesc): stmt =
+  proc `<` * (x, y: typ): bool {.borrow.}
+  proc `<=` * (x, y: typ): bool {.borrow.}
+  proc `==` * (x, y: typ): bool {.borrow.}
+
+template DefineCurrency(typ, base: expr): stmt {.immediate.} =
+  type
+    typ* = distinct base
+  Additive(typ)
+  Multiplicative(typ, base)
+  Comparable(typ)
+  
+  proc `$` * (t: typ): string {.borrow.}
+
+DefineCurrency(TDollar, int)
+DefineCurrency(TEuro, int)
+echo($( 12.TDollar + 13.TDollar )) #OUT 25
+
+
+