feat: hash()

README.md

@@ -228,6 +228,7 @@ Uninstall with `nimble uninstall pylib`.
 - [x] `format()`
 - [x] `getattr()`
 - [x] `hasattr()`
+- [x] `hash()`
 - [x] `hex()`
 - [x] `id()`
 - [x] `input()`

src/pylib/builtins.nim

@@ -3,4 +3,4 @@ import ./private/trans_imp
 
 impExp builtins,
   input, print, mathfunc, complex, misc, oopFuncs, attr,
-  iters, pyrange, pyslice, list, dict, set
+  iters, pyrange, pyslice, list, dict, set, pyhashes

src/pylib/builtins/pyhashes.nim

@@ -0,0 +1,28 @@
+
+import std/hashes
+import ./[
+  list, dict, set,
+  complex
+]
+import ../pystring/strimpl
+import ../pybytes/bytesimpl
+
+template toInt(h: Hash): int = int(h)
+template hashable(typ){.dirty.} =
+  proc hash*(x: typ): int = toInt hashes.hash(x)
+
+hashable int
+hashable float
+hashable PyComplex
+hashable PyStr
+hashable PyBytes
+hashable tuple
+hashable proc
+
+const unhashErr = "TypeError: unhashable type: "
+template unhashable(typ){.dirty.} =
+  proc hash*(x: typ): int{.error: unhashErr & $typ.}
+
+unhashable PyList
+unhashable PyDict
+unhashable PySet