Fixes for the pure-Lux JVM compiler machinery. [Part 5]

22 files changed, 378 insertions, 197 deletions

diff --git a/documentation/bookmark/game/mechanic/crafting.md b/documentation/bookmark/game/mechanic/crafting.md
index b2c89efa8..ed5a8b130 100644
--- a/documentation/bookmark/game/mechanic/crafting.md
+++ b/documentation/bookmark/game/mechanic/crafting.md
@@ -1,4 +1,5 @@
 # Reference
 
+0. [Real-World Herbalism for DnD Campaigns](https://www.youtube.com/watch?v=g2KZlOwDFmE)
 0. [Building Better Crafting Systems](https://www.youtube.com/watch?v=Nj7EaryBgak)
 
diff --git a/documentation/bookmark/game/mechanic/relationship.md b/documentation/bookmark/game/mechanic/relationship.md
index f6b0c7874..39166ebdc 100644
--- a/documentation/bookmark/game/mechanic/relationship.md
+++ b/documentation/bookmark/game/mechanic/relationship.md
@@ -1,4 +1,5 @@
 # Reference
 
+0. [Homebrew Wizard's Familiars || D&D with Dael Kingsmill](https://www.youtube.com/watch?v=qgKVm3q9vcI)
 0. [Brenda Romero - Dynamic Relationships and Traits in Empire of Sin](https://www.youtube.com/watch?v=_vf3HO3wn20)
 
diff --git a/documentation/bookmark/game/mechanic/travel.md b/documentation/bookmark/game/mechanic/travel.md
new file mode 100644
index 000000000..a5c6c1faf
--- /dev/null
+++ b/documentation/bookmark/game/mechanic/travel.md
@@ -0,0 +1,4 @@
+# Reference
+
+0. [Travel VS Exploration || D&D with Dael Kingsmill](https://www.youtube.com/watch?v=DiMiug0T93s)
+
diff --git a/lux-jvm/commands.md b/lux-jvm/commands.md
index a4644f915..aa3299ac9 100644
--- a/lux-jvm/commands.md
+++ b/lux-jvm/commands.md
@@ -32,7 +32,7 @@ cd ~/lux/stdlib/ \
 ## Use new JVM compiler to compile tests for the Standard Library
 cd ~/lux/stdlib/ \
 && lein clean \
-&& java -jar ~/lux/lux-jvm/target/program.jar build --source ~/lux/stdlib/source --target ~/lux/stdlib/target --module test/lux \
+&& java -jar ~/lux/lux-jvm/target/program.jar build --host_dependency ~/.m2/repository/com/github/luxlang/lux-jvm-function/0.6.5/lux-jvm-function-0.6.5.jar --source ~/lux/stdlib/source --target ~/lux/stdlib/target --module test/lux \
 && java -jar ~/lux/stdlib/target/program.jar
 ```
 
@@ -40,7 +40,7 @@ cd ~/lux/stdlib/ \
 
 ```
 cd ~/lux/lux-jvm/ \
-&& mvn install:install-file -Dfile=target/program.jar -DgroupId=com.github.luxlang -DartifactId=lux-jvm -Dversion=0.7.0 -Dpackaging=jar
+&& mvn install:install-file -Dfile=target/program.jar -DgroupId=com.github.luxlang -DartifactId=lux-jvm -Dversion=0.6.6 -Dpackaging=jar
 
 cd ~/lux/lux-jvm/ && mvn deploy:deploy-file \
 -Durl=https://USERNAME:PASSWORD@oss.sonatype.org/content/repositories/snapshots/ \
diff --git a/lux-jvm/source/luxc/lang/translation/jvm/extension/common.lux b/lux-jvm/source/luxc/lang/translation/jvm/extension/common.lux
index 888a7a5a5..20f3fdf7a 100644
--- a/lux-jvm/source/luxc/lang/translation/jvm/extension/common.lux
+++ b/lux-jvm/source/luxc/lang/translation/jvm/extension/common.lux
@@ -54,11 +54,6 @@
       {try.#Failure error}
       (phase.except extension.invalid_syntax [extension_name %synthesis input]))))
 
-(import: java/lang/Double
-  ["[1]::[0]"
-   ("static" MIN_VALUE java/lang/Double)
-   ("static" MAX_VALUE java/lang/Double)])
-
 (def: $String (type.class "java.lang.String" (list)))
 (def: $CharSequence (type.class "java.lang.CharSequence" (list)))
 (def: $System (type.class "java.lang.System" (list)))
@@ -160,16 +155,6 @@
   [i64::right_shift _.LUSHR]
   )
 
-(template [<name> <const> <type>]
-  [(def: (<name> _)
-     (Nullary Inst)
-     (|>> <const> (_.wrap <type>)))]
-
-  [f64::smallest (_.double (java/lang/Double::MIN_VALUE))            type.double]
-  [f64::min      (_.double (f.* -1.0 (java/lang/Double::MAX_VALUE))) type.double]
-  [f64::max      (_.double (java/lang/Double::MAX_VALUE))            type.double]
-  )
-
 (template [<name> <type> <op>]
   [(def: (<name> [paramI subjectI])
      (Binary Inst)
@@ -341,9 +326,6 @@
           (bundle.install "%" (binary f64::%))
           (bundle.install "=" (binary f64::=))
           (bundle.install "<" (binary f64::<))
-          (bundle.install "smallest" (nullary f64::smallest))
-          (bundle.install "min" (nullary f64::min))
-          (bundle.install "max" (nullary f64::max))
           (bundle.install "i64" (unary f64::i64))
           (bundle.install "encode" (unary f64::encode))
           (bundle.install "decode" (unary f64::decode)))))
diff --git a/lux-jvm/source/luxc/lang/translation/jvm/extension/host.lux b/lux-jvm/source/luxc/lang/translation/jvm/extension/host.lux
index 17165b434..dc806c8d0 100644
--- a/lux-jvm/source/luxc/lang/translation/jvm/extension/host.lux
+++ b/lux-jvm/source/luxc/lang/translation/jvm/extension/host.lux
@@ -130,26 +130,32 @@
   [_.D2F conversion::double_to_float]
   [_.D2I conversion::double_to_int]
   [_.D2L conversion::double_to_long]
+  
   [_.F2D conversion::float_to_double]
   [_.F2I conversion::float_to_int]
   [_.F2L conversion::float_to_long]
+  
   [_.I2B conversion::int_to_byte]
   [_.I2C conversion::int_to_char]
   [_.I2D conversion::int_to_double]
   [_.I2F conversion::int_to_float]
   [_.I2L conversion::int_to_long]
   [_.I2S conversion::int_to_short]
+  
   [_.L2D conversion::long_to_double]
   [_.L2F conversion::long_to_float]
   [_.L2I conversion::long_to_int]
   [..L2S conversion::long_to_short]
   [..L2B conversion::long_to_byte]
   [..L2C conversion::long_to_char]
+  
   [_.I2B conversion::char_to_byte]
   [_.I2S conversion::char_to_short]
   [_.NOP conversion::char_to_int]
   [_.I2L conversion::char_to_long]
+  
   [_.I2L conversion::byte_to_long]
+  
   [_.I2L conversion::short_to_long]
   )
 
@@ -160,33 +166,39 @@
           (bundle.install "double-to-float" (unary conversion::double_to_float))
           (bundle.install "double-to-int" (unary conversion::double_to_int))
           (bundle.install "double-to-long" (unary conversion::double_to_long))
+          
           (bundle.install "float-to-double" (unary conversion::float_to_double))
           (bundle.install "float-to-int" (unary conversion::float_to_int))
           (bundle.install "float-to-long" (unary conversion::float_to_long))
+          
           (bundle.install "int-to-byte" (unary conversion::int_to_byte))
           (bundle.install "int-to-char" (unary conversion::int_to_char))
           (bundle.install "int-to-double" (unary conversion::int_to_double))
           (bundle.install "int-to-float" (unary conversion::int_to_float))
           (bundle.install "int-to-long" (unary conversion::int_to_long))
           (bundle.install "int-to-short" (unary conversion::int_to_short))
+          
           (bundle.install "long-to-double" (unary conversion::long_to_double))
           (bundle.install "long-to-float" (unary conversion::long_to_float))
           (bundle.install "long-to-int" (unary conversion::long_to_int))
           (bundle.install "long-to-short" (unary conversion::long_to_short))
           (bundle.install "long-to-byte" (unary conversion::long_to_byte))
           (bundle.install "long-to-char" (unary conversion::long_to_char))
+          
           (bundle.install "char-to-byte" (unary conversion::char_to_byte))
           (bundle.install "char-to-short" (unary conversion::char_to_short))
           (bundle.install "char-to-int" (unary conversion::char_to_int))
           (bundle.install "char-to-long" (unary conversion::char_to_long))
+          
           (bundle.install "byte-to-long" (unary conversion::byte_to_long))
+          
           (bundle.install "short-to-long" (unary conversion::short_to_long))
           )))
 
 (template [<name> <op>]
-  [(def: (<name> [parameterI subject1])
+  [(def: (<name> [parameterI subjectI])
      (Binary Inst)
-     (|>> subject1
+     (|>> subjectI
           parameterI
           <op>))]
 
diff --git a/lux-jvm/source/luxc/lang/translation/jvm/primitive.lux b/lux-jvm/source/luxc/lang/translation/jvm/primitive.lux
index d3e69daec..0f2b64f9f 100644
--- a/lux-jvm/source/luxc/lang/translation/jvm/primitive.lux
+++ b/lux-jvm/source/luxc/lang/translation/jvm/primitive.lux
@@ -93,7 +93,7 @@
     ([-1.0 _.ICONST_M1]
      ... [+0.0 _.ICONST_0]
      ... [+1.0 _.ICONST_1]
-     [+2.0 _.ICONST_2]
+     ... [+2.0 _.ICONST_2]
      [+3.0 _.ICONST_3]
      [+4.0 _.ICONST_4]
      [+5.0 _.ICONST_5])
diff --git a/stdlib/source/library/lux/tool/compiler/language/lux/analysis.lux b/stdlib/source/library/lux/tool/compiler/language/lux/analysis.lux
index 0096a259a..cc373b65b 100644
--- a/stdlib/source/library/lux/tool/compiler/language/lux/analysis.lux
+++ b/stdlib/source/library/lux/tool/compiler/language/lux/analysis.lux
@@ -28,6 +28,7 @@
  ["[0]" / "_"
   ["[1][0]" primitive {"+" Primitive}]
   ["[1][0]" composite {"+" Tuple Variant Composite}]
+  ["[1][0]" pattern {"+" Pattern}]
   [//
    [phase
     ["[0]" extension {"+" Extension}]]
@@ -38,13 +39,6 @@
     ["[0]" reference {"+" Reference}
      ["[0]" variable {"+" Register Variable}]]]]])
 
-(type: .public Pattern
-  (Rec Pattern
-    (.Variant
-     {#Simple Primitive}
-     {#Complex (Composite Pattern)}
-     {#Bind Register})))
-
 (type: .public (Branch' e)
   (Record
    [#when Pattern
@@ -73,28 +67,11 @@
 (type: .public Match
   (Match' Analysis))
 
-(implementation: pattern_equivalence
-  (Equivalence Pattern)
-
-  (def: (= reference sample)
-    (case [reference sample]
-      [{#Simple reference} {#Simple sample}]
-      (# /primitive.equivalence = reference sample)
-      
-      [{#Complex reference} {#Complex sample}]
-      (# (/composite.equivalence =) = reference sample)
-
-      [{#Bind reference} {#Bind sample}]
-      (n.= reference sample)
-
-      _
-      false)))
-
 (implementation: (branch_equivalence equivalence)
   (-> (Equivalence Analysis) (Equivalence Branch))
 
   (def: (= [reference_pattern reference_body] [sample_pattern sample_body])
-    (and (# pattern_equivalence = reference_pattern sample_pattern)
+    (and (# /pattern.equivalence = reference_pattern sample_pattern)
          (# equivalence = reference_body sample_body))))
 
 (implementation: .public equivalence
@@ -201,16 +178,6 @@
 
 (template [<name> <tag>]
   [(template: .public (<name> content)
-     [(.<| {..#Complex}
-           <tag>
-           content)])]
-
-  [pattern/variant {/composite.#Variant}]
-  [pattern/tuple   {/composite.#Tuple}]
-  )
-
-(template [<name> <tag>]
-  [(template: .public (<name> content)
      [(.<| {..#Structure}
            {<tag>}
            content)])]
@@ -219,24 +186,6 @@
   [tuple   /composite.#Tuple]
   )
 
-(template: .public (pattern/unit)
-  [{..#Simple {/primitive.#Unit}}])
-
-(template [<name> <tag>]
-  [(template: .public (<name> content)
-     [{..#Simple {<tag> content}}])]
-  
-  [pattern/bit  /primitive.#Bit]
-  [pattern/nat  /primitive.#Nat]
-  [pattern/int  /primitive.#Int]
-  [pattern/rev  /primitive.#Rev]
-  [pattern/frac /primitive.#Frac]
-  [pattern/text /primitive.#Text]
-  )
-
-(template: .public (pattern/bind register)
-  [{..#Bind register}])
-
 (def: .public (%analysis analysis)
   (Format Analysis)
   (case analysis
diff --git a/stdlib/source/library/lux/tool/compiler/language/lux/analysis/pattern.lux b/stdlib/source/library/lux/tool/compiler/language/lux/analysis/pattern.lux
new file mode 100644
index 000000000..d2b57321f
--- /dev/null
+++ b/stdlib/source/library/lux/tool/compiler/language/lux/analysis/pattern.lux
@@ -0,0 +1,66 @@
+(.using
+ [library
+  [lux {"-" Primitive nat int rev}
+   [abstract
+    [equivalence {"+" Equivalence}]]
+   [math
+    [number
+     ["n" nat]]]]]
+ ["[0]" // "_"
+  ["[1][0]" primitive {"+" Primitive}]
+  ["[1][0]" composite {"+" Composite}]
+  [////
+   [reference
+    [variable {"+" Register}]]]])
+
+(type: .public Pattern
+  (Rec Pattern
+    (.Variant
+     {#Simple Primitive}
+     {#Complex (Composite Pattern)}
+     {#Bind Register})))
+
+(implementation: .public equivalence
+  (Equivalence Pattern)
+
+  (def: (= reference sample)
+    (case [reference sample]
+      [{#Simple reference} {#Simple sample}]
+      (# //primitive.equivalence = reference sample)
+      
+      [{#Complex reference} {#Complex sample}]
+      (# (//composite.equivalence =) = reference sample)
+
+      [{#Bind reference} {#Bind sample}]
+      (n.= reference sample)
+
+      _
+      false)))
+
+(template [<name> <tag>]
+  [(template: .public (<name> content)
+     [(.<| {..#Complex}
+           <tag>
+           content)])]
+
+  [variant {//composite.#Variant}]
+  [tuple   {//composite.#Tuple}]
+  )
+
+(template: .public (unit)
+  [{..#Simple {//primitive.#Unit}}])
+
+(template [<name> <tag>]
+  [(template: .public (<name> content)
+     [{..#Simple {<tag> content}}])]
+  
+  [bit  //primitive.#Bit]
+  [nat  //primitive.#Nat]
+  [int  //primitive.#Int]
+  [rev  //primitive.#Rev]
+  [frac //primitive.#Frac]
+  [text //primitive.#Text]
+  )
+
+(template: .public (bind register)
+  [{..#Bind register}])
diff --git a/stdlib/source/library/lux/tool/compiler/language/lux/phase/analysis/case.lux b/stdlib/source/library/lux/tool/compiler/language/lux/phase/analysis/case.lux
index c6e389f6a..4bca0ffcd 100644
--- a/stdlib/source/library/lux/tool/compiler/language/lux/phase/analysis/case.lux
+++ b/stdlib/source/library/lux/tool/compiler/language/lux/phase/analysis/case.lux
@@ -30,9 +30,10 @@
    ["/[1]" // "_"
     ["[1][0]" extension]
     [//
-     ["/" analysis {"+" Pattern Analysis Operation Phase}
+     ["/" analysis {"+" Analysis Operation Phase}
       ["[1][0]" primitive]
-      ["[1][0]" composite]]
+      ["[1][0]" composite]
+      ["[1][0]" pattern {"+" Pattern}]]
      [///
       ["[1]" phase]]]]]])
 
@@ -199,7 +200,7 @@
                                         [nextA next]
                                         (in [(list) nextA]))
                                       matches)]
-          (in [(/.pattern/tuple memberP+)
+          (in [(/pattern.tuple memberP+)
                thenA])))
 
       _
@@ -230,11 +231,11 @@
         [outputA (//scope.with_local [name inputT]
                    next)
          idx //scope.next_local]
-        (in [{/.#Bind idx} outputA])))
+        (in [{/pattern.#Bind idx} outputA])))
 
     (^template [<type> <input> <output>]
       [[location <input>]
-       (analyse_primitive <type> inputT location {/.#Simple <output>} next)])
+       (analyse_primitive <type> inputT location {/pattern.#Simple <output>} next)])
     ([Bit  {.#Bit pattern_value}  {/primitive.#Bit pattern_value}]
      [Nat  {.#Nat pattern_value}  {/primitive.#Nat pattern_value}]
      [Int  {.#Int pattern_value}  {/primitive.#Int pattern_value}]
@@ -298,7 +299,7 @@
                                                   (` [(~+ values)])
                                                   next)
                                  (analyse_pattern {.#None} caseT (` [(~+ values)]) next))]
-                (in [(/.pattern/variant [lefts right? testP])
+                (in [(/pattern.variant [lefts right? testP])
                      nextA]))
 
               _
diff --git a/stdlib/source/library/lux/tool/compiler/language/lux/phase/analysis/case/coverage.lux b/stdlib/source/library/lux/tool/compiler/language/lux/phase/analysis/case/coverage.lux
index 9306b1c20..15bb062a4 100644
--- a/stdlib/source/library/lux/tool/compiler/language/lux/phase/analysis/case/coverage.lux
+++ b/stdlib/source/library/lux/tool/compiler/language/lux/phase/analysis/case/coverage.lux
@@ -24,9 +24,10 @@
      ["f" frac]]]]]
  ["[0]" //// "_"
   [//
-   ["/" analysis {"+" Pattern Operation}
+   ["/" analysis {"+" Operation}
     ["[1][0]" primitive]
-    ["[1][0]" composite]]
+    ["[1][0]" composite]
+    ["[1][0]" pattern {"+" Pattern}]]
    [///
     ["[1]" phase ("[1]#[0]" monad)]]]])
 
@@ -116,14 +117,14 @@
 (def: .public (determine pattern)
   (-> Pattern (Operation Coverage))
   (case pattern
-    (^or {/.#Simple {/primitive.#Unit}}
-         {/.#Bind _})
+    (^or {/pattern.#Simple {/primitive.#Unit}}
+         {/pattern.#Bind _})
     (////#in {#Exhaustive})
 
     ... Primitive patterns always have partial coverage because there
     ... are too many possibilities as far as values go.
     (^template [<from> <to> <hash>]
-      [{/.#Simple {<from> it}}
+      [{/pattern.#Simple {<from> it}}
        (////#in {<to> (set.of_list <hash> (list it))})])
     ([/primitive.#Nat #Nat n.hash]
      [/primitive.#Int #Int i.hash]
@@ -134,12 +135,12 @@
     ... Bits are the exception, since there is only "#1" and
     ... "#0", which means it is possible for bit
     ... pattern-matching to become exhaustive if complementary parts meet.
-    {/.#Simple {/primitive.#Bit value}}
+    {/pattern.#Simple {/primitive.#Bit value}}
     (////#in {#Bit value})
 
     ... Tuple patterns can be exhaustive if there is exhaustiveness for all of
     ... their sub-patterns.
-    {/.#Complex {/composite.#Tuple membersP+}}
+    {/pattern.#Complex {/composite.#Tuple membersP+}}
     (case (list.reversed membersP+)
       (^or {.#End} {.#Item _ {.#End}})
       (/.except ..invalid_tuple_pattern [])
@@ -161,7 +162,7 @@
 
     ... Variant patterns can be shown to be exhaustive if all the possible
     ... cases are handled exhaustively.
-    {/.#Complex {/composite.#Variant [lefts right? value]}}
+    {/pattern.#Complex {/composite.#Variant [lefts right? value]}}
     (do ////.monad
       [value_coverage (determine value)
        .let [idx (if right?
diff --git a/stdlib/source/library/lux/tool/compiler/language/lux/phase/extension/analysis/jvm.lux b/stdlib/source/library/lux/tool/compiler/language/lux/phase/extension/analysis/jvm.lux
index 49a9758bd..db5642a25 100644
--- a/stdlib/source/library/lux/tool/compiler/language/lux/phase/extension/analysis/jvm.lux
+++ b/stdlib/source/library/lux/tool/compiler/language/lux/phase/extension/analysis/jvm.lux
@@ -51,7 +51,8 @@
      ["[0]" scope]]
     ["/[1]" // "_"
      ["[1][0]" analysis {"+" Analysis Operation Phase Handler Bundle}
-      ["[1]/[0]" composite]]
+      ["[1]/[0]" composite]
+      ["[1]/[0]" pattern]]
      ["[1][0]" synthesis]
      [///
       ["[0]" phase ("[1]#[0]" monad)]
@@ -1971,7 +1972,7 @@
         2
         {/////analysis.#Case (/////analysis.unit)
                              [[/////analysis.#when
-                               {/////analysis.#Bind 2}
+                               {/////analysis/pattern.#Bind 2}
                                
                                /////analysis.#then
                                bodyA]
@@ -1980,11 +1981,11 @@
         _
         {/////analysis.#Case (/////analysis.unit)
                              [[/////analysis.#when
-                               {/////analysis.#Complex
+                               {/////analysis/pattern.#Complex
                                 {/////analysis/composite.#Tuple
                                  (|> arity
                                      list.indices
-                                     (list#each (|>> (n.+ 2) {/////analysis.#Bind})))}}
+                                     (list#each (|>> (n.+ 2) {/////analysis/pattern.#Bind})))}}
                                
                                /////analysis.#then
                                bodyA]
diff --git a/stdlib/source/library/lux/tool/compiler/language/lux/phase/extension/generation/jvm/common.lux b/stdlib/source/library/lux/tool/compiler/language/lux/phase/extension/generation/jvm/common.lux
index 1538e19ae..25e88f063 100644
--- a/stdlib/source/library/lux/tool/compiler/language/lux/phase/extension/generation/jvm/common.lux
+++ b/stdlib/source/library/lux/tool/compiler/language/lux/phase/extension/generation/jvm/common.lux
@@ -78,10 +78,6 @@
       (///value.unwrap type.long)
       _.l2i))
 
-(def: ensure_string
-  (Bytecode Any)
-  (_.checkcast $String))
-
 (def: (predicate bytecode)
   (-> (-> Label (Bytecode Any))
       (Bytecode Any))
@@ -262,7 +258,7 @@
    (..::toString ..$Double type.double)]
   
   [f64::decode
-   ..ensure_string
+   (_.checkcast $String)
    ///runtime.decode_frac]
   )
 
@@ -304,7 +300,7 @@
   (Unary (Bytecode Any))
   ($_ _.composite
       inputG
-      ..ensure_string
+      (_.checkcast $String)
       (_.invokevirtual ..$String "length" (type.method [(list) (list) type.int (list)]))
       ..lux_int))
 
@@ -321,10 +317,10 @@
   [text::= ..no_op ..no_op
    (_.invokevirtual ..$Object "equals" (type.method [(list) (list ..$Object) type.boolean (list)]))
    (///value.wrap type.boolean)]
-  [text::< ..ensure_string ..ensure_string
+  [text::< (_.checkcast $String) (_.checkcast $String)
    (_.invokevirtual ..$String "compareTo" (type.method [(list) (list ..$String) type.int (list)]))
    (..predicate _.iflt)]
-  [text::char ..ensure_string ..jvm_int
+  [text::char (_.checkcast $String) ..jvm_int
    (_.invokevirtual ..$String "charAt" (type.method [(list) (list type.int) type.char (list)]))
    ..lux_int]
   )
@@ -332,14 +328,14 @@
 (def: (text::concat [leftG rightG])
   (Binary (Bytecode Any))
   ($_ _.composite
-      leftG ..ensure_string
-      rightG ..ensure_string
+      leftG (_.checkcast $String)
+      rightG (_.checkcast $String)
       (_.invokevirtual ..$String "concat" (type.method [(list) (list ..$String) ..$String (list)]))))
 
 (def: (text::clip [offset! length! subject!])
   (Trinary (Bytecode Any))
   ($_ _.composite
-      subject! ..ensure_string
+      subject! (_.checkcast $String)
       offset! ..jvm_int
       _.dup
       length! ..jvm_int
@@ -353,8 +349,8 @@
     [@not_found _.new_label
      @end _.new_label]
     ($_ _.composite
-        textG ..ensure_string
-        partG ..ensure_string
+        textG (_.checkcast $String)
+        partG (_.checkcast $String)
         startG ..jvm_int
         (_.invokevirtual ..$String "indexOf" index_method)
         _.dup
@@ -386,7 +382,7 @@
   ($_ _.composite
       (_.getstatic ..$System "out" ..$PrintStream)
       messageG
-      ..ensure_string
+      (_.checkcast $String)
       (_.invokevirtual ..$PrintStream "println" ..string_method)
       ///runtime.unit))
 
@@ -396,7 +392,7 @@
       (_.new ..$Error)
       _.dup
       messageG
-      ..ensure_string
+      (_.checkcast $String)
       (_.invokespecial ..$Error "<init>" ..string_method)
       _.athrow))
 
diff --git a/stdlib/source/library/lux/tool/compiler/language/lux/phase/extension/generation/jvm/host.lux b/stdlib/source/library/lux/tool/compiler/language/lux/phase/extension/generation/jvm/host.lux
index dd3816d77..9f461699f 100644
--- a/stdlib/source/library/lux/tool/compiler/language/lux/phase/extension/generation/jvm/host.lux
+++ b/stdlib/source/library/lux/tool/compiler/language/lux/phase/extension/generation/jvm/host.lux
@@ -74,16 +74,16 @@
        ["[0]" artifact]
        ["[0]" dependency]]]]]]])
 
-(template [<name> <0> <1>]
+(template [<name> <0>]
   [(def: <name>
      (Bytecode Any)
      ($_ _.composite
-         <0>
-         <1>))]
+         _.l2i
+         <0>))]
 
-  [l2s _.l2i _.i2s]
-  [l2b _.l2i _.i2b]
-  [l2c _.l2i _.i2c]
+  [l2s _.i2s]
+  [l2b _.i2b]
+  [l2c _.i2c]
   )
 
 (template [<conversion> <name>]
@@ -98,26 +98,32 @@
   [_.d2f conversion::double_to_float]
   [_.d2i conversion::double_to_int]
   [_.d2l conversion::double_to_long]
+  
   [_.f2d conversion::float_to_double]
   [_.f2i conversion::float_to_int]
   [_.f2l conversion::float_to_long]
+  
   [_.i2b conversion::int_to_byte]
   [_.i2c conversion::int_to_char]
   [_.i2d conversion::int_to_double]
   [_.i2f conversion::int_to_float]
   [_.i2l conversion::int_to_long]
   [_.i2s conversion::int_to_short]
+  
   [_.l2d conversion::long_to_double]
   [_.l2f conversion::long_to_float]
   [_.l2i conversion::long_to_int]
   [..l2s conversion::long_to_short]
   [..l2b conversion::long_to_byte]
   [..l2c conversion::long_to_char]
+  
   [_.i2b conversion::char_to_byte]
   [_.i2s conversion::char_to_short]
   [_.nop conversion::char_to_int]
   [_.i2l conversion::char_to_long]
+  
   [_.i2l conversion::byte_to_long]
+  
   [_.i2l conversion::short_to_long]
   )
 
@@ -128,35 +134,41 @@
           (/////bundle.install "double-to-float" (unary conversion::double_to_float))
           (/////bundle.install "double-to-int" (unary conversion::double_to_int))
           (/////bundle.install "double-to-long" (unary conversion::double_to_long))
+          
           (/////bundle.install "float-to-double" (unary conversion::float_to_double))
           (/////bundle.install "float-to-int" (unary conversion::float_to_int))
           (/////bundle.install "float-to-long" (unary conversion::float_to_long))
+          
           (/////bundle.install "int-to-byte" (unary conversion::int_to_byte))
           (/////bundle.install "int-to-char" (unary conversion::int_to_char))
           (/////bundle.install "int-to-double" (unary conversion::int_to_double))
           (/////bundle.install "int-to-float" (unary conversion::int_to_float))
           (/////bundle.install "int-to-long" (unary conversion::int_to_long))
           (/////bundle.install "int-to-short" (unary conversion::int_to_short))
+          
           (/////bundle.install "long-to-double" (unary conversion::long_to_double))
           (/////bundle.install "long-to-float" (unary conversion::long_to_float))
           (/////bundle.install "long-to-int" (unary conversion::long_to_int))
           (/////bundle.install "long-to-short" (unary conversion::long_to_short))
           (/////bundle.install "long-to-byte" (unary conversion::long_to_byte))
           (/////bundle.install "long-to-char" (unary conversion::long_to_char))
+          
           (/////bundle.install "char-to-byte" (unary conversion::char_to_byte))
           (/////bundle.install "char-to-short" (unary conversion::char_to_short))
           (/////bundle.install "char-to-int" (unary conversion::char_to_int))
           (/////bundle.install "char-to-long" (unary conversion::char_to_long))
+          
           (/////bundle.install "byte-to-long" (unary conversion::byte_to_long))
+          
           (/////bundle.install "short-to-long" (unary conversion::short_to_long))
           )))
 
 (template [<name> <op>]
-  [(def: (<name> [xG yG])
+  [(def: (<name> [parameter! subject!])
      (Binary (Bytecode Any))
      ($_ _.composite
-         xG
-         yG
+         subject!
+         parameter!
          <op>))]
 
   [int::+ _.iadd]
@@ -201,14 +213,14 @@
 (def: trueG (_.getstatic ..$Boolean "TRUE" ..$Boolean))
 
 (template [<name> <op>]
-  [(def: (<name> [xG yG])
+  [(def: (<name> [reference subject])
      (Binary (Bytecode Any))
      (do _.monad
        [@then _.new_label
         @end _.new_label]
        ($_ _.composite
-           xG
-           yG
+           subject
+           reference
            (<op> @then)
            falseG
            (_.goto @end)
@@ -224,14 +236,14 @@
   )
 
 (template [<name> <op> <reference>]
-  [(def: (<name> [xG yG])
+  [(def: (<name> [reference subject])
      (Binary (Bytecode Any))
      (do _.monad
        [@then _.new_label
         @end _.new_label]
        ($_ _.composite
-           xG
-           yG
+           subject
+           reference
            <op>
            (_.int (i32.i32 (.i64 <reference>)))
            (_.if_icmpeq @then)
@@ -571,7 +583,7 @@
         (in ($_ _.composite
                 objectG
                 (_.instanceof (type.class class (list)))
-                (_.invokestatic ..$Boolean "valueOf" (type.method [(list) (list type.boolean) ..$Boolean (list)]))))))]))
+                (///value.wrap type.boolean)))))]))
 
 (def: reflection
   (All (_ category)
@@ -593,17 +605,15 @@
                              (let [$<object> (type.class <object> (list))]
                                ($_ _.composite
                                    valueG
-                                   (_.invokestatic $<object> "valueOf" (type.method [(list) (list <type>) $<object> (list)]))))
+                                   (///value.wrap <type>)))
 
                              (and (text#= <object>
                                           from)
                                   (text#= (..reflection <type>)
                                           to))
-                             (let [$<object> (type.class <object> (list))]
-                               ($_ _.composite
-                                   valueG
-                                   (_.checkcast $<object>)
-                                   (_.invokevirtual $<object> <unwrap> (type.method [(list) (list) <type> (list)]))))]
+                             ($_ _.composite
+                                 valueG
+                                 (///value.unwrap <type>))]
                             
                             [box.boolean type.boolean "booleanValue"]
                             [box.byte    type.byte    "byteValue"]
diff --git a/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/primitive.lux b/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/primitive.lux
index 44200c2d2..27cba044c 100644
--- a/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/primitive.lux
+++ b/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/primitive.lux
@@ -113,7 +113,7 @@
     ([-1.0 _.iconst_m1]
      ... [+0.0 _.iconst_0]
      ... [+1.0 _.iconst_1]
-     [+2.0 _.iconst_2]
+     ... [+2.0 _.iconst_2]
      [+3.0 _.iconst_3]
      [+4.0 _.iconst_4]
      [+5.0 _.iconst_5])
diff --git a/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/program.lux b/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/program.lux
index d788e3526..d8ab2d2d6 100644
--- a/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/program.lux
+++ b/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/program.lux
@@ -58,7 +58,7 @@
       class.final
       ))
 
-(def: nil
+(def: list:end
   //runtime.none_injection)
 
 (def: amount_of_inputs
@@ -86,21 +86,28 @@
 
 (def: pair
   (Bytecode Any)
-  ($_ _.composite
-      _.iconst_2
-      (_.anewarray ^Object)
-      _.dup_x1
-      _.swap
-      _.iconst_0
-      _.swap
-      _.aastore
-      _.dup_x1
-      _.swap
-      _.iconst_1
-      _.swap
-      _.aastore))
+  (let [empty_pair ($_ _.composite
+                       _.iconst_2
+                       (_.anewarray ^Object)
+                       )
+        set_side! (: (-> (Bytecode Any) (Bytecode Any))
+                     (function (_ index)
+                       ($_ _.composite
+                           ... ?P
+                           _.dup_x1  ... P?P
+                           _.swap    ... PP?
+                           index     ... PP?I
+                           _.swap    ... PPI?
+                           _.aastore ... P
+                           )))]
+    ($_ _.composite
+        ... RL
+        empty_pair ... RLP
+        (set_side! _.iconst_0) ... RP
+        (set_side! _.iconst_1) ... P
+        )))
 
-(def: cons //runtime.right_injection)
+(def: list:item //runtime.right_injection)
 
 (def: input_list
   (Bytecode Any)
@@ -108,7 +115,7 @@
     [@loop _.new_label
      @end _.new_label]
     ($_ _.composite
-        ..nil
+        ..list:end
         ..amount_of_inputs
         (_.set_label @loop)
         ..decrease
@@ -116,7 +123,7 @@
         (_.iflt @end)
         ..head
         ..pair
-        ..cons
+        ..list:item
         _.swap
         (_.goto @loop)
         (_.set_label @end)
@@ -129,7 +136,7 @@
   (Bytecode Any)
   ($_ _.composite
       (_.checkcast //function/abstract.class)
-      _.aconst_null
+      //runtime.unit
       //runtime.apply))
 
 (def: .public (program artifact_name context program)
diff --git a/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/runtime.lux b/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/runtime.lux
index d71b1817a..ece1fa89e 100644
--- a/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/runtime.lux
+++ b/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/runtime.lux
@@ -379,12 +379,15 @@
   [(Resource Method) (Resource Method)]
   (let [$tuple _.aload_0
         $tuple::size ($_ _.composite
-                         $tuple _.arraylength)
+                         $tuple
+                         _.arraylength)
 
         $lefts _.iload_1
 
         $last_right ($_ _.composite
-                        $tuple::size _.iconst_1 _.isub)
+                        $tuple::size
+                        _.iconst_1
+                        _.isub)
 
         update_$lefts ($_ _.composite
                           $lefts $last_right _.isub
@@ -407,7 +410,8 @@
                           [@loop _.new_label
                            @recursive _.new_label
                            .let [::left ($_ _.composite
-                                            $lefts _.aaload)]]
+                                            $lefts
+                                            _.aaload)]]
                           ($_ _.composite
                               (_.set_label @loop)
                               $lefts $last_right (_.if_icmpge @recursive)
@@ -430,7 +434,9 @@
                                             _.iconst_1
                                             _.iadd)
                                  $::nested ($_ _.composite
-                                               $tuple _.swap _.aaload)
+                                               $tuple
+                                               _.swap
+                                               _.aaload)
                                  super_nested ($_ _.composite
                                                   $tuple
                                                   $right
@@ -478,7 +484,6 @@
                     [@try _.new_label
                      @handler _.new_label
                      .let [$unsafe ..this
-                           unit _.aconst_null
 
                            ^StringWriter (type.class "java.io.StringWriter" (list))
                            string_writer ($_ _.composite
@@ -495,19 +500,29 @@
                                             ..true   ... WTPPWZ
                                             (_.invokespecial ^PrintWriter "<init>" (type.method [(list) (list (type.class "java.io.Writer" (list)) type.boolean) type.void (list)]))
                                             ... WTP
-                                            )]]
+                                            )
+                           unsafe_application ($_ _.composite
+                                                  $unsafe
+                                                  ..unit
+                                                  ..apply)
+                           stack_trace ($_ _.composite
+                                           ... T
+                                           string_writer          ... TW
+                                           _.dup_x1               ... WTW
+                                           print_writer           ... WTP
+                                           (_.invokevirtual //type.error "printStackTrace" (type.method [(list) (list ^PrintWriter) type.void (list)])) ... W
+                                           (_.invokevirtual ^StringWriter "toString" (type.method [(list) (list) //type.text (list)])) ... S
+                                           )]]
                     ($_ _.composite
                         (_.try @try @handler @handler //type.error)
                         (_.set_label @try)
-                        $unsafe unit ..apply
-                        ..right_injection _.areturn
+                        unsafe_application
+                        ..right_injection
+                        _.areturn
                         (_.set_label @handler) ... T
-                        string_writer          ... TW
-                        _.dup_x1               ... WTW
-                        print_writer           ... WTP
-                        (_.invokevirtual //type.error "printStackTrace" (type.method [(list) (list ^PrintWriter) type.void (list)])) ... W
-                        (_.invokevirtual ^StringWriter "toString" (type.method [(list) (list) //type.text (list)])) ... S
-                        ..left_injection _.areturn
+                        stack_trace ... S
+                        ..left_injection
+                        _.areturn
                         ))}))
 
 (def: reflection
diff --git a/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/structure.lux b/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/structure.lux
index 7827fee86..e7cfad2c2 100644
--- a/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/structure.lux
+++ b/stdlib/source/library/lux/tool/compiler/language/lux/phase/generation/jvm/structure.lux
@@ -18,6 +18,7 @@
      [encoding
       ["[0]" signed]]]]]]
  ["[0]" // "_"
+  ["[1][0]" type]
   ["[1][0]" runtime {"+" Operation Phase Generator}]
   ["[1][0]" primitive]
   ["///[1]" //// "_"
@@ -27,9 +28,6 @@
    [///
     ["[0]" phase]]]])
 
-(def: $Object
-  (type.class "java.lang.Object" (list)))
-
 (def: .public (tuple phase archive membersS)
   (Generator (Tuple Synthesis))
   (case membersS
@@ -53,7 +51,7 @@
                                             _.aastore))))))]
       (in (do [! _.monad]
             [_ (_.int (.i64 (list.size membersS)))
-             _ (_.anewarray $Object)]
+             _ (_.anewarray //type.value)]
             (monad.all ! membersI))))))
 
 (def: .public (lefts lefts)
@@ -93,6 +91,6 @@
            _ valueI]
           (_.invokestatic //runtime.class "variant"
                           (type.method [(list)
-                                        (list type.int $Object $Object)
-                                        (type.array $Object)
+                                        (list //type.lefts //type.right? //type.value)
+                                        //type.variant
                                         (list)]))))))
diff --git a/stdlib/source/library/lux/tool/compiler/language/lux/phase/synthesis/case.lux b/stdlib/source/library/lux/tool/compiler/language/lux/phase/synthesis/case.lux
index 10d71f730..47d9fbe79 100644
--- a/stdlib/source/library/lux/tool/compiler/language/lux/phase/synthesis/case.lux
+++ b/stdlib/source/library/lux/tool/compiler/language/lux/phase/synthesis/case.lux
@@ -21,9 +21,10 @@
  ["[0]" /// "_"
   [//
    ["/" synthesis {"+" Path Synthesis Operation Phase}]
-   ["[1][0]" analysis {"+" Pattern Match Analysis}
+   ["[1][0]" analysis {"+" Match Analysis}
     ["[2][0]" primitive]
-    ["[2][0]" composite]]
+    ["[2][0]" composite]
+    ["[2][0]" pattern {"+" Pattern}]]
    [///
     ["[1]" phase ("[1]#[0]" monad)]
     ["[1][0]" reference
@@ -38,7 +39,7 @@
 (def: (path' pattern end? thenC)
   (-> Pattern Bit (Operation Path) (Operation Path))
   (case pattern
-    {///analysis.#Simple simple}
+    {///pattern.#Simple simple}
     (case simple
       {///primitive.#Unit}
       thenC
@@ -59,12 +60,12 @@
        [///primitive.#Frac /.#F64_Fork |>]
        [///primitive.#Text /.#Text_Fork |>]))
 
-    {///analysis.#Bind register}
+    {///pattern.#Bind register}
     (<| (# ///.monad each (|>> {/.#Seq {/.#Bind register}}))
         /.with_new_local
         thenC)
 
-    {///analysis.#Complex {///composite.#Variant [lefts right? value_pattern]}}
+    {///pattern.#Complex {///composite.#Variant [lefts right? value_pattern]}}
     (<| (///#each (|>> {/.#Seq {/.#Access {/.#Side (if right?
                                                      {.#Right lefts}
                                                      {.#Left lefts})}}}))
@@ -72,11 +73,11 @@
         (when> [(new> (not end?) [])] [(///#each ..clean_up)])
         thenC)
 
-    {///analysis.#Complex {///composite.#Tuple tuple}}
+    {///pattern.#Complex {///composite.#Tuple tuple}}
     (let [tuple::last (-- (list.size tuple))]
       (list#mix (function (_ [tuple::lefts tuple::member] nextC)
                   (.case tuple::member
-                    {///analysis.#Simple {///primitive.#Unit}}
+                    {///pattern.#Simple {///primitive.#Unit}}
                     nextC
 
                     _
@@ -193,7 +194,7 @@
       <default>)))
 
 (def: (get patterns @selection)
-  (-> (///composite.Tuple ///analysis.Pattern) Register (List /.Member))
+  (-> (///composite.Tuple Pattern) Register (List /.Member))
   (loop [lefts 0
          patterns patterns]
     (with_expansions [<failure> (as_is (list))
@@ -208,15 +209,15 @@
 
         {.#Item head tail}
         (case head
-          {///analysis.#Simple {///primitive.#Unit}}
+          {///pattern.#Simple {///primitive.#Unit}}
           <continue>
           
-          {///analysis.#Bind register}
+          {///pattern.#Bind register}
           (if (n.= @selection register)
             (list <member>)
             <continue>)
 
-          {///analysis.#Complex {///composite.#Tuple sub_patterns}}
+          {///pattern.#Complex {///composite.#Tuple sub_patterns}}
           (case (get sub_patterns @selection)
             {.#End}
             <continue>
@@ -235,7 +236,7 @@
     (in (/.branch/case [input (list#mix weave headSP tailSP+)]))))
 
 (template: (!masking <variable> <output>)
-  [[[{///analysis.#Bind <variable>}
+  [[[{///pattern.#Bind <variable>}
      {///analysis.#Reference (///reference.local <output>)}]
     (list)]])
 
@@ -260,12 +261,12 @@
     (in (/.branch/if [test then else]))))
 
 (template: (!get <patterns> <output>)
-  [[[(///analysis.pattern/tuple <patterns>)
+  [[[(///pattern.tuple <patterns>)
      {///analysis.#Reference (///reference.local <output>)}]
     (.list)]])
 
 (def: .public (synthesize_get synthesize archive input patterns @member)
-  (-> Phase Archive Synthesis (///composite.Tuple ///analysis.Pattern) Register (Operation Synthesis))
+  (-> Phase Archive Synthesis (///composite.Tuple Pattern) Register (Operation Synthesis))
   (case (..get patterns @member)
     {.#End}
     (..synthesize_case synthesize archive input (!get patterns @member))
@@ -286,19 +287,19 @@
       (^ (!masking @variable @output))
       (..synthesize_masking synthesize^ archive inputS @variable @output)
 
-      [[{///analysis.#Bind @variable} body]
+      [[{///pattern.#Bind @variable} body]
        {.#End}]
       (..synthesize_let synthesize^ archive inputS @variable body)
       
-      (^or (^ [[(///analysis.pattern/bit #1) then]
-               (list [(///analysis.pattern/bit #0) else])])
-           (^ [[(///analysis.pattern/bit #1) then]
-               (list [(///analysis.pattern/unit) else])])
-
-           (^ [[(///analysis.pattern/bit #0) else]
-               (list [(///analysis.pattern/bit #1) then])])
-           (^ [[(///analysis.pattern/bit #0) else]
-               (list [(///analysis.pattern/unit) then])]))
+      (^or (^ [[(///pattern.bit #1) then]
+               (list [(///pattern.bit #0) else])])
+           (^ [[(///pattern.bit #1) then]
+               (list [(///pattern.unit) else])])
+
+           (^ [[(///pattern.bit #0) else]
+               (list [(///pattern.bit #1) then])])
+           (^ [[(///pattern.bit #0) else]
+               (list [(///pattern.unit) then])]))
       (..synthesize_if synthesize^ archive inputS then else)
       
       (^ (!get patterns @member))
diff --git a/stdlib/source/test/lux/target/ruby.lux b/stdlib/source/test/lux/target/ruby.lux
index 7723cd776..61fb1197e 100644
--- a/stdlib/source/test/lux/target/ruby.lux
+++ b/stdlib/source/test/lux/target/ruby.lux
@@ -16,7 +16,8 @@
     ["[0]" text ("[1]#[0]" equivalence)
      ["%" format {"+" format}]]
     [collection
-     ["[0]" list ("[1]#[0]" functor)]]]
+     ["[0]" list ("[1]#[0]" functor)]
+     ["[0]" set]]]
    ["[0]" math
     ["[0]" random {"+" Random} ("[1]#[0]" monad)]
     [number
@@ -299,7 +300,16 @@
   (do [! random.monad]
     [float/0 random.safe_frac
      $foreign (# ! each /.local (random.ascii/lower 10))
-     field (# ! each /.string (random.ascii/upper 10))]
+     field (# ! each /.string (random.ascii/upper 10))
+
+     $inputs (# ! each /.local (random.ascii/lower 10))
+     arity (# ! each (n.% 10) random.nat)
+     vals (|> random.int
+              (# ! each /.int)
+              (random.list arity))
+     keys (|> (random.ascii/lower 1)
+              (random.set text.hash arity)
+              (# ! each (|>> set.list (list#each /.string))))]
     ($_ _.and
         (<| (_.for [/.Var])
             ($_ _.and
@@ -310,6 +320,24 @@
                                              (/.return $foreign))
                                          [(list $foreign)] (/.lambda {.#None})
                                          (/.apply_lambda/* (list (/.float float/0))))))
+                (<| (_.for [/.LVar*])
+                    ($_ _.and
+                        (_.cover [/.variadic]
+                                 (expression (|>> (:as Int) .nat (n.= arity))
+                                             (|> (/.return (/.the "length" $inputs))
+                                                 [(list (/.variadic $inputs))] (/.lambda {.#None})
+                                                 (/.apply_lambda/* vals))))
+                        (_.cover [/.splat]
+                                 (expression (|>> (:as Int) .nat (n.= arity))
+                                             (|> (/.return (/.the "length" (/.array (list (/.splat $inputs)))))
+                                                 [(list (/.variadic $inputs))] (/.lambda {.#None})
+                                                 (/.apply_lambda/* vals))))))
+                (<| (_.for [/.LVar**])
+                    (_.cover [/.variadic_kv /.double_splat]
+                             (expression (|>> (:as Int) .nat (n.= arity))
+                                         (|> (/.return (/.the "length" $inputs))
+                                             [(list (/.variadic_kv $inputs))] (/.lambda {.#None})
+                                             (/.apply_lambda/* (list (/.double_splat (/.hash (list.zipped/2 keys vals)))))))))
                 ))
         (_.cover [/.Access]
                  (and (expression (|>> (:as Frac) (f.= (f.+ float/0 float/0)))
diff --git a/stdlib/source/test/lux/tool.lux b/stdlib/source/test/lux/tool.lux
index df128f232..761192245 100644
--- a/stdlib/source/test/lux/tool.lux
+++ b/stdlib/source/test/lux/tool.lux
@@ -12,7 +12,8 @@
      ... ["[1][0]" syntax]
      ["[1][0]" analysis "_"
       ["[1]/[0]" primitive]
-      ["[1]/[0]" composite]]
+      ["[1]/[0]" composite]
+      ["[1]/[0]" pattern]]
      ... [phase
      ...  ["[1][0]" analysis]
      ...  ["[1][0]" synthesis]]
@@ -30,6 +31,7 @@
       /reference.test
       /analysis/primitive.test
       /analysis/composite.test
+      /analysis/pattern.test
       /meta/archive/signature.test
       ... /syntax.test
       ... /analysis.test
diff --git a/stdlib/source/test/lux/tool/compiler/language/lux/analysis/pattern.lux b/stdlib/source/test/lux/tool/compiler/language/lux/analysis/pattern.lux
new file mode 100644
index 000000000..b4ee9e9c8
--- /dev/null
+++ b/stdlib/source/test/lux/tool/compiler/language/lux/analysis/pattern.lux
@@ -0,0 +1,106 @@
+(.using
+ [library
+  [lux "*"
+   ["_" test {"+" Test}]
+   [abstract
+    [monad {"+" do}]
+    [\\specification
+     ["$[0]" equivalence]]]
+   [data
+    ["[0]" bit ("[1]#[0]" equivalence)]
+    ["[0]" text ("[1]#[0]" equivalence)]]
+   [math
+    ["[0]" random {"+" Random} ("[1]#[0]" monad)]
+    [number
+     ["f" frac]]]]]
+ [\\library
+  ["[0]" /]]
+ ["[0]" // "_"
+  ["[1][0]" primitive]
+  ["[1][0]" composite]])
+
+(def: .public random
+  (Random /.Pattern)
+  (random.rec
+   (function (_ random)
+     ($_ random.or
+         //primitive.random
+         (//composite.random 4 random)
+         random.nat
+         ))))
+
+(def: .public test
+  Test
+  (<| (_.covering /._)
+      (_.for [/.Pattern])
+      (do random.monad
+        [expected_register random.nat
+         expected_bit random.bit
+         expected_nat random.nat
+         expected_int random.int
+         expected_rev random.rev
+         expected_frac random.frac
+         expected_text (random.ascii/lower 2)
+
+         expected_lefts random.nat
+         expected_right? random.bit])
+      (`` ($_ _.and
+              (_.for [/.equivalence]
+                     ($equivalence.spec /.equivalence ..random))
+              
+              (_.cover [/.unit]
+                       (case (/.unit)
+                         (^ (/.unit))
+                         true
+
+                         _
+                         false))
+              (~~ (template [<tag> <value>]
+                    [(_.cover [<tag>]
+                              (case (<tag> <value>)
+                                (^ (<tag> actual))
+                                (same? <value> actual)
+
+                                _
+                                false))]
+
+                    [/.bind expected_register]
+                    [/.bit expected_bit]
+                    [/.nat expected_nat]
+                    [/.int expected_int]
+                    [/.rev expected_rev]
+                    [/.frac expected_frac]
+                    [/.text expected_text]
+                    ))
+              (_.cover [/.variant]
+                       (case (/.variant [expected_lefts expected_right? (/.text expected_text)])
+                         (^ (/.variant [actual_lefts actual_right? (/.text actual_text)]))
+                         (and (same? expected_lefts actual_lefts)
+                              (same? expected_right? actual_right?)
+                              (same? expected_text actual_text))
+
+                         _
+                         false))
+              (_.cover [/.tuple]
+                       (case (/.tuple (list (/.bit expected_bit)
+                                            (/.nat expected_nat)
+                                            (/.int expected_int)
+                                            (/.rev expected_rev)
+                                            (/.frac expected_frac)
+                                            (/.text expected_text)))
+                         (^ (/.tuple (list (/.bit actual_bit)
+                                           (/.nat actual_nat)
+                                           (/.int actual_int)
+                                           (/.rev actual_rev)
+                                           (/.frac actual_frac)
+                                           (/.text actual_text))))
+                         (and (same? expected_bit actual_bit)
+                              (same? expected_nat actual_nat)
+                              (same? expected_int actual_int)
+                              (same? expected_rev actual_rev)
+                              (same? expected_frac actual_frac)
+                              (same? expected_text actual_text))
+
+                         _
+                         false))
+              ))))