Added support for row polymorphism.

5 files changed, 224 insertions, 2 deletions

diff --git a/stdlib/source/test/lux/meta/type.lux b/stdlib/source/test/lux/meta/type.lux
index 67119dd60..e4c8ad2ea 100644
--- a/stdlib/source/test/lux/meta/type.lux
+++ b/stdlib/source/test/lux/meta/type.lux
@@ -42,7 +42,8 @@
   ["[1][0]" resource]
   ["[1][0]" unit]
   ["[1][0]" variance]
-  ["[1][0]" poly]])
+  ["[1][0]" poly]
+  ["[1][0]" row]])
 
 (def !expect
   (template (_ <pattern> <value>)
@@ -572,4 +573,5 @@
            /unit.test
            /variance.test
            /poly.test
+           /row.test
            )))
diff --git a/stdlib/source/test/lux/meta/type/row.lux b/stdlib/source/test/lux/meta/type/row.lux
new file mode 100644
index 000000000..49988cc33
--- /dev/null
+++ b/stdlib/source/test/lux/meta/type/row.lux
@@ -0,0 +1,146 @@
+(.require
+ [library
+  [lux (.except)
+   [abstract
+    [monad (.only do)]]
+   [control
+    ["[0]" try]
+    ["[0]" exception]]
+   [data
+    ["[0]" text]]
+   [math
+    ["[0]" random (.only Random)]
+    [number
+     ["n" nat]]]
+   [meta
+    ["[0]" code (.only)
+     ["<[1]>" \\parser]]
+    [macro
+     [syntax (.only syntax)]
+     ["[0]" expansion]
+     ["[0]" template]]]
+   [test
+    ["_" property (.only Test)]]
+   [world
+    [time
+     ["[0]" instant (.only Instant)]
+     ["[0]" duration (.only Duration)]]]]]
+ [\\library
+  ["[0]" /]])
+
+(/.type .public Mortal
+  [@birth Instant
+   @life_span (Maybe Duration)])
+
+(/.type Human
+  Mortal
+  [@name Text])
+
+(/.type (TransHuman id)
+  Human
+  [@id id])
+
+(def macro_error
+  (syntax (_ [macro <code>.any])
+    (function (_ compiler)
+      (when ((expansion.complete macro) compiler)
+        {try.#Failure error}
+        {try.#Success [compiler (list (code.text error))]}
+        
+        {try.#Success _}
+        {try.#Failure "OOPS!"}))))
+
+(template.with_locals [<slot>]
+  (def repeat_slot_error
+    (macro_error
+     (/.type Bad_Row
+       [<slot> Bit
+        <slot> Nat]))))
+
+(def .public test
+  Test
+  (<| (_.covering /._)
+      (_.for [/.Row])
+      (do [! random.monad]
+        [dummy_birth random.instant
+         expected_birth (random.only (|>> (same? dummy_birth) not)
+                                     random.instant)
+         expected_life_span (random.maybe random.duration)
+
+         dummy_name (random.upper_case 1)
+         expected_name (random.upper_case 2)
+
+         dummy_id random.nat
+         expected_id (random.only (|>> (n.= dummy_id) not) random.nat)])
+      (all _.and
+           (_.coverage [/.type /.row]
+             (exec
+               (is Mortal
+                   (/.row [@birth expected_birth
+                           @life_span expected_life_span]))
+               (is Human
+                   (/.row [@name expected_name
+                           @birth expected_birth
+                           @life_span expected_life_span]))
+               (is (TransHuman Nat)
+                   (/.row [@id expected_id
+                           @name expected_name
+                           @birth expected_birth
+                           @life_span expected_life_span]))
+               true))
+           (_.coverage [/.cannot_repeat_slot_names]
+             (text.contains? (the exception.#label /.cannot_repeat_slot_names)
+                             repeat_slot_error))
+           (_.coverage [/.missing_level]
+             (and (|> (/.row [@name expected_name])
+                      macro_error
+                      (text.contains? (the exception.#label /.missing_level)))
+                  (|> (/.row [@id expected_id])
+                      macro_error
+                      (text.contains? (the exception.#label /.missing_level)))
+                  (|> (/.row [@id expected_id
+                              @name expected_name])
+                      macro_error
+                      (text.contains? (the exception.#label /.missing_level)))
+                  (|> (/.row [@id expected_id
+                              @birth expected_birth
+                              @life_span expected_life_span])
+                      macro_error
+                      (text.contains? (the exception.#label /.missing_level)))))
+           (_.for [/.Slot /.slot]
+                  (all _.and
+                       (_.coverage [/.the]
+                         (and (|> (/.row [@birth expected_birth
+                                          @life_span expected_life_span])
+                                  (is Mortal)
+                                  (/.the @birth)
+                                  (same? expected_birth))
+                              (|> (/.row [@name expected_name
+                                          @birth expected_birth
+                                          @life_span expected_life_span])
+                                  (is Human)
+                                  (/.the @name)
+                                  (same? expected_name))
+                              (|> (/.row [@id expected_id
+                                          @name expected_name
+                                          @birth expected_birth
+                                          @life_span expected_life_span])
+                                  (is (TransHuman Nat))
+                                  (/.the @id)
+                                  (same? expected_id))))
+                       (_.coverage [/.has]
+                         (|> (/.row [@birth dummy_birth
+                                     @life_span expected_life_span])
+                             (is Mortal)
+                             (/.has @birth expected_birth)
+                             (/.the @birth)
+                             (same? expected_birth)))
+                       (_.coverage [/.revised]
+                         (|> (/.row [@birth dummy_birth
+                                     @life_span expected_life_span])
+                             (is Mortal)
+                             (/.revised @birth (function (_ _) expected_birth))
+                             (/.the @birth)
+                             (same? expected_birth)))
+                       ))
+           )))
diff --git a/stdlib/source/test/lux/test.lux b/stdlib/source/test/lux/test.lux
index 2ba71ac51..6400db17f 100644
--- a/stdlib/source/test/lux/test.lux
+++ b/stdlib/source/test/lux/test.lux
@@ -5,11 +5,13 @@
     ["_" property (.only Test)]]]]
  ["[0]" /
   ["[1][0]" coverage]
+  ["[1][0]" tally]
   ["[1][0]" property]])
 
 (def .public test
   Test
   (all _.and
        /coverage.test
+       /tally.test
        /property.test
        ))
diff --git a/stdlib/source/test/lux/test/property.lux b/stdlib/source/test/lux/test/property.lux
index 67dd9c7e1..8a1fa2f0d 100644
--- a/stdlib/source/test/lux/test/property.lux
+++ b/stdlib/source/test/lux/test/property.lux
@@ -42,7 +42,7 @@
          (in (do async.monad
                [[success_tally success_message] (unit.test expected_message/0 true)
                 [failure_tally failure_message] (unit.test expected_message/0 false)]
-               (unit.coverage [unit.test tally.Tally]
+               (unit.coverage [unit.test]
                  (and (text.ends_with? (%.text expected_message/0) success_message)
                       (text.ends_with? (%.text expected_message/0) failure_message)
                       (and (n.= 1 (the tally.#successes success_tally))
diff --git a/stdlib/source/test/lux/test/tally.lux b/stdlib/source/test/lux/test/tally.lux
new file mode 100644
index 000000000..c1d43ad79
--- /dev/null
+++ b/stdlib/source/test/lux/test/tally.lux
@@ -0,0 +1,72 @@
+(.require
+ [library
+  [lux (.except)
+   [abstract
+    [monad (.only do)]]
+   [data
+    [collection
+     ["[0]" set (.use "[1]#[0]" equivalence)]]]
+   [math
+    ["[0]" random]
+    [number
+     ["n" nat]]]
+   [meta
+    ["[0]" symbol]]
+   [test
+    ["_" property (.only Test)]]]]
+ [\\library
+  ["[0]" /]]
+ [///
+  [meta
+   ["[0]T" symbol]]])
+
+(def .public test
+  Test
+  (<| (_.covering /._)
+      (_.for [/.Tally])
+      (do [! random.monad]
+        [left (symbolT.random 1 1)
+         right (symbolT.random 2 2)
+         expected_successes random.nat
+         expected_failures random.nat])
+      (all _.and
+           (_.coverage [/.empty]
+             (and (n.= 0 (the /.#successes /.empty))
+                  (n.= 0 (the /.#failures /.empty))
+                  (n.= 0 (set.size (the /.#expected /.empty)))
+                  (n.= 0 (set.size (the /.#actual /.empty)))))
+           (_.coverage [/.success]
+             (and (n.= 1 (the /.#successes /.success))
+                  (n.= 0 (the /.#failures /.success))
+                  (n.= 0 (set.size (the /.#expected /.success)))
+                  (n.= 0 (set.size (the /.#actual /.success)))))
+           (_.coverage [/.failure]
+             (and (n.= 0 (the /.#successes /.failure))
+                  (n.= 1 (the /.#failures /.failure))
+                  (n.= 0 (set.size (the /.#expected /.failure)))
+                  (n.= 0 (set.size (the /.#actual /.failure)))))
+           (_.coverage [/.and]
+             (and (let [it (/.and /.success /.success)]
+                    (and (n.= 2 (the /.#successes it))
+                         (n.= 0 (the /.#failures it))))
+                  (let [it (/.and /.failure /.failure)]
+                    (and (n.= 0 (the /.#successes it))
+                         (n.= 2 (the /.#failures it))))
+                  (let [it (/.and /.success /.failure)]
+                    (and (n.= 1 (the /.#successes it))
+                         (n.= 1 (the /.#failures it))))
+                  (let [custom [/.#successes expected_successes
+                                /.#failures expected_failures
+                                /.#expected (set.of_list symbol.hash (list left))
+                                /.#actual (set.of_list symbol.hash (list right))]]
+                    (and (let [it (/.and /.success custom)]
+                           (and (n.= (++ expected_successes) (the /.#successes it))
+                                (n.= expected_failures (the /.#failures it))
+                                (set#= (the /.#expected custom) (the /.#expected it))
+                                (set#= (the /.#actual custom) (the /.#actual it))))
+                         (let [it (/.and custom /.failure)]
+                           (and (n.= expected_successes (the /.#successes it))
+                                (n.= (++ expected_failures) (the /.#failures it))
+                                (set#= (the /.#expected custom) (the /.#expected it))
+                                (set#= (the /.#actual custom) (the /.#actual it))))))))
+           )))