Optimizations for the pure-Lux JVM compiler. [Part 1]

6 files changed, 267 insertions, 136 deletions

diff --git a/stdlib/source/test/lux/target/python.lux b/stdlib/source/test/lux/target/python.lux
index dc4a3871f..39c51b2a7 100644
--- a/stdlib/source/test/lux/target/python.lux
+++ b/stdlib/source/test/lux/target/python.lux
@@ -10,6 +10,7 @@
      ["$[0]" equivalence]
      ["$[0]" hash]]]
    [control
+    ["[0]" function]
     ["[0]" maybe ("[1]#[0]" functor)]
     ["[0]" try {"+" Try} ("[1]#[0]" functor)]]
    [data
@@ -180,6 +181,19 @@
                                  (/.str/1 (/.int left))))
             ))))
 
+(def: test|text
+  Test
+  (do [! random.monad]
+    [expected_code (# ! each (n.% 128) random.nat)
+     .let [expected_char (text.of_char expected_code)]]
+    ($_ _.and
+        (_.cover [/.chr/1 /.ord/1]
+                 (and (expression (|>> (:as Int) .nat (n.= expected_code))
+                                  (/.ord/1 (/.chr/1 (/.int (.int expected_code)))))
+                      (expression (|>> (:as Text) (text#= expected_char))
+                                  (/.chr/1 (/.ord/1 (/.string expected_char))))))
+        )))
+
 (def: test|array
   Test
   (do [! random.monad]
@@ -195,14 +209,16 @@
            to (/.int (.int (n.+ plus from)))
            from (/.int (.int from))]]
     ($_ _.and
-        (_.cover [/.list /.item]
-                 (expression (|>> (:as Frac) (f.= expected))
-                             (/.item (/.int (.int index))
-                                     (/.list (list#each /.float items)))))
-        (_.cover [/.tuple /.item]
-                 (expression (|>> (:as Frac) (f.= expected))
-                             (/.item (/.int (.int index))
-                                     (/.tuple (list#each /.float items)))))
+        (_.for [/.item]
+               ($_ _.and
+                   (_.cover [/.list]
+                            (expression (|>> (:as Frac) (f.= expected))
+                                        (/.item (/.int (.int index))
+                                                (/.list (list#each /.float items)))))
+                   (_.cover [/.tuple]
+                            (expression (|>> (:as Frac) (f.= expected))
+                                        (/.item (/.int (.int index))
+                                                (/.tuple (list#each /.float items)))))))
         (_.cover [/.slice /.len/1]
                  (expression (|>> (:as Int) (i.= (.int plus)))
                              (|> (/.list (list#each /.float items))
@@ -238,7 +254,7 @@
      else random.safe_frac
 
      bool random.bit
-     float random.frac
+     float (random.only (|>> f.not_a_number? not) random.frac)
      string (random.ascii/upper 5)
 
      comment (random.ascii/upper 10)]
@@ -246,6 +262,7 @@
         ..test|bool
         ..test|float
         ..test|int
+        ..test|text
         ..test|array
         ..test|dict
         (_.cover [/.?]
@@ -258,6 +275,13 @@
                  (expression (|>> (:as Frac) (f.= then))
                              (/.comment comment
                                (/.float then))))
+        (_.cover [/.__import__/1]
+                 (expression (function.constant true)
+                             (/.__import__/1 (/.string "math"))))
+        (_.cover [/.do]
+                 (expression (|>> (:as Frac) (f.= (math.ceil float)))
+                             (|> (/.__import__/1 (/.string "math"))
+                                 (/.do "ceil" (list (/.float float))))))
         )))
 
 (def: test|function
diff --git a/stdlib/source/test/lux/tool.lux b/stdlib/source/test/lux/tool.lux
index 2291880ec..9d9d6c3a2 100644
--- a/stdlib/source/test/lux/tool.lux
+++ b/stdlib/source/test/lux/tool.lux
@@ -16,7 +16,8 @@
       ["[1]/[0]" extension]
       ["[1]/[0]" analysis "_"
        ["[1]/[0]" simple]
-       ["[1]/[0]" complex]]
+       ["[1]/[0]" complex]
+       ["[1]/[0]" reference]]
       ... ["[1]/[0]" synthesis]
       ]]]
    ["[1][0]" meta "_"
@@ -37,6 +38,7 @@
       /phase/extension.test
       /phase/analysis/simple.test
       /phase/analysis/complex.test
+      /phase/analysis/reference.test
       ... /syntax.test
       ... /synthesis.test
       ))
diff --git a/stdlib/source/test/lux/tool/compiler/language/lux/analysis/inference.lux b/stdlib/source/test/lux/tool/compiler/language/lux/analysis/inference.lux
index 1a5ece06a..fa3df9c67 100644
--- a/stdlib/source/test/lux/tool/compiler/language/lux/analysis/inference.lux
+++ b/stdlib/source/test/lux/tool/compiler/language/lux/analysis/inference.lux
@@ -186,7 +186,7 @@
                                 (type (Ex (_ a) (-> a a)))
                                 (list (` ("lux io error" ""))))
                      //type.inferring
-                     (//module.with_module 0 (product.left name))
+                     (//module.with 0 (product.left name))
                      (/phase#each (|>> product.right product.left check.clean //type.check))
                      /phase#conjoint
                      (/phase.result state)
@@ -231,7 +231,7 @@
                                               
                                               {.#None}
                                               (in true)))
-                                          (//module.with_module 0 (product.left name))
+                                          (//module.with 0 (product.left name))
                                           (/phase#each product.right)
                                           (/phase.result state)
                                           (try.else false))))
@@ -331,7 +331,7 @@
                                 
                                 {.#None}
                                 (in true)))
-                            (//module.with_module 0 (product.left name))
+                            (//module.with 0 (product.left name))
                             (/phase#each product.right)
                             (/phase.result state)
                             (try.else false))))
diff --git a/stdlib/source/test/lux/tool/compiler/language/lux/analysis/module.lux b/stdlib/source/test/lux/tool/compiler/language/lux/analysis/module.lux
index ab07c98b3..d5cc7e0b8 100644
--- a/stdlib/source/test/lux/tool/compiler/language/lux/analysis/module.lux
+++ b/stdlib/source/test/lux/tool/compiler/language/lux/analysis/module.lux
@@ -82,9 +82,9 @@
                        (in (and (not pre) post)))
                      (/phase.result state)
                      (try.else false)))
-        (_.cover [/.with_module]
+        (_.cover [/.with]
                  (|> (do /phase.monad
-                       [[it _] (/.with_module hash name
+                       [[it _] (/.with hash name
                                  (in []))]
                        (in it))
                      (/phase.result state)
@@ -94,7 +94,7 @@
                  (`` (and (~~ (template [<expected>]
                                 [(|> (do [! /phase.monad]
                                        [_ (/.create hash expected_import)
-                                        [it ?] (/.with_module hash name
+                                        [it ?] (/.with hash name
                                                  (do !
                                                    [_ (if <expected>
                                                         (/.import expected_import)
@@ -111,7 +111,7 @@
         (_.cover [/.alias]
                  (|> (do [! /phase.monad]
                        [_ (/.create hash expected_import)
-                        [it _] (/.with_module hash name
+                        [it _] (/.with hash name
                                  (do !
                                    [_ (/.import expected_import)]
                                    (/.alias expected_alias expected_import)))]
@@ -139,7 +139,7 @@
             (~~ (template [<set> <query> <not/0> <not/1>]
                   [(_.cover [<set> <query>]
                             (|> (do [! /phase.monad]
-                                  [[it ?] (/.with_module hash name
+                                  [[it ?] (/.with hash name
                                             (do !
                                               [_ (<set> name)
                                                ? (<query> name)
@@ -156,7 +156,7 @@
                   ))
             (_.cover [/.can_only_change_state_of_active_module]
                      (and (~~ (template [<pre> <post>]
-                                [(|> (/.with_module hash name
+                                [(|> (/.with hash name
                                        (do /phase.monad
                                          [_ (<pre> name)]
                                          (<post> name)))
@@ -215,7 +215,7 @@
     ($_ _.and
         (_.cover [/.define]
                  (`` (and (~~ (template [<global>]
-                                [(|> (/.with_module hash module_name
+                                [(|> (/.with hash module_name
                                        (/.define def_name <global>))
                                      (/phase.result state)
                                      (case> {try.#Success _} true
@@ -226,7 +226,7 @@
                                 [{.#Type [public? def_type {.#Right [labels|head labels|tail]}]}]
                                 [{.#Tag [public? def_type (list& labels|head labels|tail) index]}]
                                 [{.#Slot [public? def_type (list& labels|head labels|tail) index]}]))
-                          (|> (/.with_module hash module_name
+                          (|> (/.with hash module_name
                                 (do /phase.monad
                                   [_ (/.define def_name definition)]
                                   (/.define alias_name alias)))
@@ -235,7 +235,7 @@
                                      {try.#Failure _} false)))))
         (_.cover [/.cannot_define_more_than_once]
                  (`` (and (~~ (template [<global>]
-                                [(|> (/.with_module hash module_name
+                                [(|> (/.with hash module_name
                                        (do /phase.monad
                                          [_ (/.define def_name <global>)]
                                          (/.define def_name <global>)))
@@ -248,7 +248,7 @@
                                 [{.#Type [public? def_type {.#Right [labels|head labels|tail]}]}]
                                 [{.#Tag [public? def_type (list& labels|head labels|tail) index]}]
                                 [{.#Slot [public? def_type (list& labels|head labels|tail) index]}]))
-                          (|> (/.with_module hash module_name
+                          (|> (/.with hash module_name
                                 (do /phase.monad
                                   [_ (/.define def_name definition)
                                    _ (/.define alias_name alias)]
@@ -280,7 +280,7 @@
     ($_ _.and
         (_.cover [/.declare_labels]
                  (`` (and (~~ (template [<side> <record?> <query> <on_success>]
-                                [(|> (/.with_module hash module_name
+                                [(|> (/.with hash module_name
                                        (do [! /phase.monad]
                                          [.let [it {.#Named [module_name def_name] def_type}]
                                           _ (/.define def_name {.#Type [public? it {<side> [labels|head labels|tail]}]})
@@ -297,7 +297,7 @@
                                 [.#Right true meta.tag false])))))
         (_.cover [/.cannot_declare_labels_for_anonymous_type]
                  (`` (and (~~ (template [<side> <record?>]
-                                [(|> (/.with_module hash module_name
+                                [(|> (/.with hash module_name
                                        (do [! /phase.monad]
                                          [.let [it def_type]
                                           _ (/.define def_name {.#Type [public? it {<side> [labels|head labels|tail]}]})]
@@ -313,7 +313,7 @@
                                 [.#Right true])))))
         (_.cover [/.cannot_declare_labels_for_foreign_type]
                  (`` (and (~~ (template [<side> <record?>]
-                                [(|> (/.with_module hash module_name
+                                [(|> (/.with hash module_name
                                        (do [! /phase.monad]
                                          [.let [it {.#Named [foreign_module def_name] def_type}]
                                           _ (/.define def_name {.#Type [public? it {<side> [labels|head labels|tail]}]})]
diff --git a/stdlib/source/test/lux/tool/compiler/language/lux/phase/analysis/complex.lux b/stdlib/source/test/lux/tool/compiler/language/lux/phase/analysis/complex.lux
index fcf0a556e..f559e98c4 100644
--- a/stdlib/source/test/lux/tool/compiler/language/lux/phase/analysis/complex.lux
+++ b/stdlib/source/test/lux/tool/compiler/language/lux/phase/analysis/complex.lux
@@ -153,7 +153,7 @@
 
                                              _
                                              false)))
-                                     (//module.with_module 0 (product.left name))
+                                     (//module.with 0 (product.left name))
                                      (//phase#each product.right)
                                      (//phase.result state)
                                      (try.else false))))]
@@ -172,7 +172,7 @@
 
                                     _
                                     false)))
-                            (//module.with_module 0 (product.left name))
+                            (//module.with 0 (product.left name))
                             (//phase#each product.right)
                             (//phase.result state)
                             (try.else false))
@@ -246,7 +246,7 @@
 
                                                           _
                                                           false)))
-                                                  (//module.with_module 0 module)
+                                                  (//module.with 0 module)
                                                   (//phase#each product.right)
                                                   (//phase.result state)
                                                   (try.else false))))
@@ -265,7 +265,7 @@
 
                                                           _
                                                           false)))
-                                                  (//module.with_module 0 module)
+                                                  (//module.with 0 module)
                                                   (//phase#each product.right)
                                                   (//phase.result state)
                                                   (try.else false))))]
@@ -313,7 +313,7 @@
 
                                                  _
                                                  false)))
-                                         (//module.with_module 0 module)
+                                         (//module.with 0 module)
                                          (//phase#each product.right)
                                          (//phase.result state)
                                          (try.else false))))]
@@ -338,7 +338,7 @@
 
                                     _
                                     false)))
-                            (//module.with_module 0 module)
+                            (//module.with 0 module)
                             (//phase#each product.right)
                             (//phase.result state)
                             (try.else false))
@@ -357,7 +357,7 @@
 
                                     _
                                     false)))
-                            (//module.with_module 0 module)
+                            (//module.with 0 module)
                             (//phase#each product.right)
                             (//phase.result state)
                             (try.else false))
@@ -380,7 +380,7 @@
 
                                     _
                                     false)))
-                            (//module.with_module 0 module)
+                            (//module.with 0 module)
                             (//phase#each product.right)
                             (//phase.result state)
                             (try.else false))
@@ -398,7 +398,7 @@
 
                                     _
                                     false)))
-                            (//module.with_module 0 module)
+                            (//module.with 0 module)
                             (//phase#each product.right)
                             (//phase.result state)
                             (try.else false)))))
@@ -473,7 +473,7 @@
                                     (|> (do //phase.monad
                                           [_ (//module.declare_labels true slots/0 false :record:)]
                                           (/.normal input))
-                                        (//module.with_module 0 module)
+                                        (//module.with 0 module)
                                         (//phase#each product.right)
                                         (//phase.result state)
                                         (case> {try.#Success {.#Some actual}}
@@ -501,7 +501,7 @@
                                            [_ (//module.declare_labels true slots/0 false :record:)]
                                            (/.order pattern_matching? input))
                                          //scope.with
-                                         (//module.with_module 0 module)
+                                         (//module.with 0 module)
                                          (//phase#each (|>> product.right product.right))
                                          (//phase.result state)
                                          (case> {try.#Success {.#Some [actual_arity actual_tuple actual_type]}}
@@ -541,7 +541,7 @@
                                       (|> (do //phase.monad
                                             [_ (//module.declare_labels true slots/0 false :record:)]
                                             (/.order pattern_matching? (list.repeated arity [[module head_slot/0] head_term/0])))
-                                          (//module.with_module 0 module)
+                                          (//module.with 0 module)
                                           (//phase#each product.right)
                                           (//phase.result state)
                                           (..failure? /.cannot_repeat_slot))))]
@@ -556,7 +556,7 @@
                                               [_ (//module.declare_labels true slots/0 false :record:)]
                                               (/.order pattern_matching? input))
                                             //scope.with
-                                            (//module.with_module 0 module)
+                                            (//module.with 0 module)
                                             (//phase.result state)
                                             (..failure? /.record_size_mismatch))))]
                    (and (mismatched? false (list.first slice local_record))
@@ -576,7 +576,7 @@
                                                _ (//module.declare_labels true slots/1 false :record:)]
                                               (/.order pattern_matching? input))
                                             //scope.with
-                                            (//module.with_module 0 module)
+                                            (//module.with 0 module)
                                             (//phase.result state)
                                             (..failure? /.slot_does_not_belong_to_record))))]
                    (and (mismatched? false local_record)
@@ -591,7 +591,7 @@
                                           (/.record ..analysis archive.empty tuple))
                                         (//type.expecting type)
                                         //scope.with
-                                        (//module.with_module 0 module)
+                                        (//module.with 0 module)
                                         (//phase#each (|>> product.right product.right))
                                         (//phase.result state)
                                         (try#each (analysed? expected))
@@ -603,7 +603,7 @@
                                             (//type.inferring
                                              (/.record ..analysis archive.empty record)))
                                           //scope.with
-                                          (//module.with_module 0 module)
+                                          (//module.with 0 module)
                                           (//phase#each (|>> product.right product.right))
                                           (//phase.result state)
                                           (try#each (function (_ [actual_type actual_term])
diff --git a/stdlib/source/test/lux/tool/compiler/language/lux/phase/analysis/reference.lux b/stdlib/source/test/lux/tool/compiler/language/lux/phase/analysis/reference.lux
index 39bd5fd28..c16cbf491 100644
--- a/stdlib/source/test/lux/tool/compiler/language/lux/phase/analysis/reference.lux
+++ b/stdlib/source/test/lux/tool/compiler/language/lux/phase/analysis/reference.lux
@@ -1,108 +1,213 @@
 (.using
+ [library
   [lux "*"
-   [abstract
-    ["[0]" monad {"+" do}]]
-   ["r" math/random {"+" Random}]
    ["_" test {"+" Test}]
+   [abstract
+    [monad {"+" do}]]
    [control
-    pipe
-    ["[0]" try {"+" Try}]]
+    [pipe {"+" case>}]
+    ["[0]" try ("[1]#[0]" functor)]
+    ["[0]" exception]]
    [data
-    ["[0]" text ("[1]#[0]" equivalence)]
-    [number
-     ["n" nat]]]
-   ["[0]" type ("[1]#[0]" equivalence)]
-   [macro
-    ["[0]" code]]
-   [meta
-    ["[0]" symbol ("[1]#[0]" equivalence)]]]
-  [//
-   ["_[0]" primitive]]
-  [\\
-   ["[0]" /
-    ["/[1]" //
-     ["[1][0]" scope]
-     ["[1][0]" module]
-     ["[1][0]" type]
-     ["/[1]" // "_"
-      ["/[1]" //
-       ["[1][0]" analysis {"+" Analysis Variant Tag Operation}]
-       [///
-        ["[1][0]" reference]
-        ["[0]" phase]
-        [meta
-         ["[0]" archive]]]]]]]])
+    ["[0]" product]
+    ["[0]" text]]
+   [math
+    ["[0]" random]]
+   ["[0]" type ("[1]#[0]" equivalence)
+    ["$[1]" \\test]]]]
+ [\\library
+  ["[0]" /
+   ["/[1]" // "_"
+    [//
+     ["[1][0]" extension]
+     [//
+      ["[1][0]" analysis
+       ["[2][0]" scope]
+       ["[2][0]" module]
+       ["[2][0]" type
+        ["$[1]" \\test]]]
+      [///
+       ["[1][0]" phase ("[1]#[0]" monad)]]]]]]])
 
-(type: Check (-> (Try Any) Bit))
+(def: .public test
+  Test
+  (<| (_.covering /._)
+      (do [! random.monad]
+        [lux $//type.random_state
+         .let [state [//extension.#bundle //extension.empty
+                      //extension.#state lux]]
+         expected_name (random.ascii/lower 1)
+         expected_type ($type.random 0)
+         expected_module (random.ascii/lower 2)
+         import (random.ascii/lower 3)
+         expected_label (random.ascii/lower 4)
+         record? random.bit]
+        ($_ _.and
+            (_.cover [/.reference]
+                     (let [can_find_local_variable!
+                           (|> (/.reference ["" expected_name])
+                               (//scope.with_local [expected_name expected_type])
+                               //type.inferring
+                               //scope.with
+                               (//phase.result state)
+                               (try#each (|>> product.right
+                                              (case> (^ [actual_type (//analysis.local 0)])
+                                                     (type#= expected_type actual_type)
 
-(template [<name> <on_success> <on_failure>]
-  [(def: <name>
-     Check
-     (|>> (case> {try.#Success _}
-                 <on_success>
+                                                     _
+                                                     false)))
+                               (try.else false))
 
-                 {try.#Failure _}
-                 <on_failure>)))]
+                           can_find_foreign_variable!
+                           (|> (/.reference ["" expected_name])
+                               //type.inferring
+                               //scope.with
+                               (//scope.with_local [expected_name expected_type])
+                               //scope.with
+                               (//phase.result state)
+                               (try#each (|>> product.right
+                                              product.right
+                                              (case> (^ [actual_type (//analysis.foreign 0)])
+                                                     (type#= expected_type actual_type)
 
-  [success? true false]
-  [failure? false true]
-  )
+                                                     _
+                                                     false)))
+                               (try.else false))
 
-(def: (reach_test var_name [export? def_module] [import? dependent_module] check!)
-  (-> Text [Bit Text] [Bit Text] Check Bit)
-  (|> (do [! phase.monad]
-        [_ (//module.with_module 0 def_module
-             (//module.define var_name {.#Right [export? Any []]}))]
-        (//module.with_module 0 dependent_module
-          (do !
-            [_ (if import?
-                 (//module.import def_module)
-                 (in []))]
-            (//type.with_inference
-              (_primitive.phase archive.empty (code.symbol [def_module var_name]))))))
-      (phase.result _primitive.state)
-      check!))
+                           can_find_local_definition!
+                           (|> (do //phase.monad
+                                 [_ (//module.define expected_name {.#Definition [#0 expected_type []]})]
+                                 (/.reference ["" expected_name]))
+                               //type.inferring
+                               (//module.with 0 expected_module)
+                               (//phase.result state)
+                               (try#each (|>> product.right
+                                              (case> (^ [actual_type (//analysis.constant [actual_module actual_name])])
+                                                     (and (type#= expected_type actual_type)
+                                                          (same? expected_module actual_module)
+                                                          (same? expected_name actual_name))
 
-(def: .public test
-  (<| (_.context (symbol.module (symbol /._)))
-      (do r.monad
-        [[expectedT _] _primitive.primitive
-         def_module (r.unicode 5)
-         scope_name (r.unicode 5)
-         var_name (r.unicode 5)
-         dependent_module (|> (r.unicode 5)
-                              (r.only (|>> (text#= def_module) not)))]
-        ($_ _.and
-            (_.test "Can analyse variable."
-                    (|> (//scope.with_scope scope_name
-                          (//scope.with_local [var_name expectedT]
-                            (//type.with_inference
-                              (_primitive.phase archive.empty (code.local_symbol var_name)))))
-                        (phase.result _primitive.state)
-                        (case> (^ {try.#Success [inferredT {////analysis.#Reference (////reference.local var)}]})
-                               (and (type#= expectedT inferredT)
-                                    (n.= 0 var))
+                                                     _
+                                                     false)))
+                               (try.else false))
+
+                           can_find_foreign_definition!
+                           (|> (do //phase.monad
+                                 [_ (//module.with 0 import
+                                      (//module.define expected_name {.#Definition [#1 expected_type []]}))
+                                  _ (//module.import import)]
+                                 (/.reference [import expected_name]))
+                               //type.inferring
+                               (//module.with 0 expected_module)
+                               (//phase.result state)
+                               (try#each (|>> product.right
+                                              (case> (^ [actual_type (//analysis.constant [actual_module actual_name])])
+                                                     (and (type#= expected_type actual_type)
+                                                          (same? import actual_module)
+                                                          (same? expected_name actual_name))
+
+                                                     _
+                                                     false)))
+                               (try.else false))
+
+                           can_find_alias!
+                           (|> (do //phase.monad
+                                 [_ (//module.with 0 import
+                                      (//module.define expected_name {.#Definition [#1 expected_type []]}))
+                                  _ (//module.import import)
+                                  _ (//module.define expected_name {.#Alias [import expected_name]})]
+                                 (/.reference [expected_module expected_name]))
+                               //type.inferring
+                               (//module.with 0 expected_module)
+                               (//phase.result state)
+                               (try#each (|>> product.right
+                                              (case> (^ [actual_type (//analysis.constant [actual_module actual_name])])
+                                                     (and (type#= expected_type actual_type)
+                                                          (same? import actual_module)
+                                                          (same? expected_name actual_name))
+
+                                                     _
+                                                     false)))
+                               (try.else false))
+
+                           can_find_type!
+                           (|> (do //phase.monad
+                                 [_ (//module.define expected_name {.#Type [#0 expected_type
+                                                                            (if record?
+                                                                              {.#Right [expected_label (list)]}
+                                                                              {.#Left [expected_label (list)]})]})]
+                                 (/.reference [expected_module expected_name]))
+                               //type.inferring
+                               (//module.with 0 expected_module)
+                               (//phase.result state)
+                               (try#each (|>> product.right
+                                              (case> (^ [actual_type (//analysis.constant [actual_module actual_name])])
+                                                     (and (type#= .Type actual_type)
+                                                          (same? expected_module actual_module)
+                                                          (same? expected_name actual_name))
 
-                               _
-                               false)))
-            (_.test "Can analyse definition (in the same module)."
-                    (let [def_name [def_module var_name]]
-                      (|> (do phase.monad
-                            [_ (//module.define var_name {.#Right [false expectedT []]})]
-                            (//type.with_inference
-                              (_primitive.phase archive.empty (code.symbol def_name))))
-                          (//module.with_module 0 def_module)
-                          (phase.result _primitive.state)
-                          (case> (^ {try.#Success [_ inferredT {////analysis.#Reference (////reference.constant constant_name)}]})
-                                 (and (type#= expectedT inferredT)
-                                      (symbol#= def_name constant_name))
+                                                     _
+                                                     false)))
+                               (try.else false))]
+                       (and can_find_local_variable!
+                            can_find_foreign_variable!
+                            
+                            can_find_local_definition!
+                            can_find_foreign_definition!
 
-                                 _
-                                 false))))
-            (_.test "Can analyse definition (if exported from imported module)."
-                    (reach_test var_name [true def_module] [true dependent_module] success?))
-            (_.test "Cannot analyse definition (if not exported from imported module)."
-                    (reach_test var_name [false def_module] [true dependent_module] failure?))
-            (_.test "Cannot analyse definition (if exported from non-imported module)."
-                    (reach_test var_name [true def_module] [false dependent_module] failure?))
+                            can_find_alias!
+                            can_find_type!)))
+            (_.cover [/.foreign_module_has_not_been_imported]
+                     (let [scenario (: (-> Type Global Bit)
+                                       (function (_ expected_type it)
+                                         (|> (do //phase.monad
+                                               [_ (//module.with 0 import
+                                                    (//module.define expected_name it))
+                                                _ (/.reference [import expected_name])]
+                                               (in false))
+                                             (//type.expecting expected_type)
+                                             (//module.with 0 expected_module)
+                                             (//phase#each product.right)
+                                             (//phase.result state)
+                                             (exception.otherwise (text.contains? (value@ exception.#label /.foreign_module_has_not_been_imported)))
+                                             )))]
+                       (and (scenario expected_type {.#Definition [#1 expected_type []]})
+                            (scenario .Type {.#Type [#1 expected_type
+                                                     (if record?
+                                                       {.#Right [expected_label (list)]}
+                                                       {.#Left [expected_label (list)]})]}))))
+            (_.cover [/.definition_has_not_been_exported]
+                     (let [scenario (: (-> Type Global Bit)
+                                       (function (_ expected_type it)
+                                         (|> (do //phase.monad
+                                               [_ (//module.with 0 import
+                                                    (//module.define expected_name it))
+                                                _ (/.reference [import expected_name])]
+                                               (in false))
+                                             (//type.expecting expected_type)
+                                             (//module.with 0 expected_module)
+                                             (//phase#each product.right)
+                                             (//phase.result state)
+                                             (exception.otherwise (text.contains? (value@ exception.#label /.definition_has_not_been_exported)))
+                                             )))]
+                       (and (scenario expected_type {.#Definition [#0 expected_type []]})
+                            (scenario .Type {.#Type [#0 expected_type
+                                                     (if record?
+                                                       {.#Right [expected_label (list)]}
+                                                       {.#Left [expected_label (list)]})]}))))
+            (_.cover [/.labels_are_not_definitions]
+                     (let [scenario (: (-> Type Global Bit)
+                                       (function (_ expected_type it)
+                                         (|> (do //phase.monad
+                                               [_ (//module.with 0 import
+                                                    (//module.define expected_label it))
+                                                _ (/.reference [import expected_label])]
+                                               (in false))
+                                             (//type.expecting expected_type)
+                                             (//module.with 0 expected_module)
+                                             (//phase#each product.right)
+                                             (//phase.result state)
+                                             (exception.otherwise (text.contains? (value@ exception.#label /.labels_are_not_definitions))))))]
+                       (and (scenario expected_type {.#Tag [#1 expected_type (list) 0]})
+                            (scenario expected_type {.#Slot [#1 expected_type (list) 0]}))))
             ))))