7 files changed, 49 insertions, 4 deletions
diff --git a/stdlib/source/lux/compiler/default.lux b/stdlib/source/lux/compiler/default.lux
index bc6e2c9ec..bc58c5d7b 100644
--- a/stdlib/source/lux/compiler/default.lux
+++ b/stdlib/source/lux/compiler/default.lux
@@ -1,8 +1,10 @@
 (.module:
-  lux)
+  [lux #*
+   [data
+    ["." error (#+ Error)]]])
 
 (type: #export Eval
-  (-> Type Code (Meta Any)))
+  (-> Type Code (Error Any)))
 
 (type: #export Version Text)
 
diff --git a/stdlib/source/lux/compiler/default/evaluation.lux b/stdlib/source/lux/compiler/default/evaluation.lux
new file mode 100644
index 000000000..26c4b0355
--- /dev/null
+++ b/stdlib/source/lux/compiler/default/evaluation.lux
@@ -0,0 +1,30 @@
+(.module:
+  [lux #*
+   [control
+    [monad (#+ do)]
+    pipe]
+   [data
+    ["." error]]]
+  ["." // (#+ Eval)
+   ["." phase
+    ["." analysis
+     [".A" expression]]
+    ["." synthesis
+     [".S" expression]]
+    ["." translation]]])
+
+(def: #export (evaluator analysis-state synthesis-state translation-state translate)
+  (All [anchor expression statement]
+    (-> analysis.State+
+        synthesis.State+
+        (translation.State+ anchor expression statement)
+        (translation.Phase anchor expression statement)
+        Eval))
+  (function (eval type exprC)
+    (do error.Monad<Error>
+      [exprA (|> exprC (expressionA.analyser eval)(phase.run analysis-state))
+       exprS (|> exprA expressionS.synthesize (phase.run synthesis-state))]
+      (phase.run translation-state
+                 (do phase.Monad<Operation>
+                   [exprO (translate exprS)]
+                   (translation.evaluate! exprO))))))
diff --git a/stdlib/source/lux/compiler/default/phase/analysis.lux b/stdlib/source/lux/compiler/default/phase/analysis.lux
index cbd447d46..72d2a3485 100644
--- a/stdlib/source/lux/compiler/default/phase/analysis.lux
+++ b/stdlib/source/lux/compiler/default/phase/analysis.lux
@@ -51,6 +51,9 @@
   (#Apply Analysis Analysis)
   (#Extension (Extension Analysis)))
 
+(type: #export State+
+  (extension.State .Lux Code Analysis))
+
 (type: #export Operation
   (extension.Operation .Lux Code Analysis))
 
diff --git a/stdlib/source/lux/compiler/default/phase/extension.lux b/stdlib/source/lux/compiler/default/phase/extension.lux
index a24d72b0c..15960083b 100644
--- a/stdlib/source/lux/compiler/default/phase/extension.lux
+++ b/stdlib/source/lux/compiler/default/phase/extension.lux
@@ -23,11 +23,14 @@
   (type: #export (Bundle s i o)
     <Bundle>))
 
+(type: #export (State s i o)
+  [(Bundle s i o) s])
+
 (type: #export (Operation s i o v)
-  (//.Operation [(Bundle s i o) s] v))
+  (//.Operation (State s i o) v))
 
 (type: #export (Phase s i o)
-  (//.Phase [(Bundle s i o) s] i o))
+  (//.Phase (State s i o) i o))
 
 (do-template [<name>]
   [(exception: #export (<name> {name Text})
diff --git a/stdlib/source/lux/compiler/default/phase/synthesis.lux b/stdlib/source/lux/compiler/default/phase/synthesis.lux
index 1dbbffd84..99111d2a7 100644
--- a/stdlib/source/lux/compiler/default/phase/synthesis.lux
+++ b/stdlib/source/lux/compiler/default/phase/synthesis.lux
@@ -98,6 +98,9 @@
   (#Control (Control Synthesis))
   (#Extension (Extension Synthesis)))
 
+(type: #export State+
+  (extension.State ..State Analysis Synthesis))
+
 (type: #export Operation
   (extension.Operation ..State Analysis Synthesis))
 
diff --git a/stdlib/source/lux/compiler/default/phase/translation.lux b/stdlib/source/lux/compiler/default/phase/translation.lux
index d2b0b0678..321573767 100644
--- a/stdlib/source/lux/compiler/default/phase/translation.lux
+++ b/stdlib/source/lux/compiler/default/phase/translation.lux
@@ -71,6 +71,9 @@
    #counter Nat
    #name-cache (Dictionary Name Text)})
 
+(type: #export (State+ anchor expression statement)
+  (extension.State (State anchor expression statement) Synthesis expression))
+
 (type: #export (Operation anchor expression statement)
   (extension.Operation (State anchor expression statement) Synthesis expression))
 
diff --git a/stdlib/test/tests.lux b/stdlib/test/tests.lux
index 2380365bf..0e09def80 100644
--- a/stdlib/test/tests.lux
+++ b/stdlib/test/tests.lux
@@ -43,6 +43,7 @@
     [host
      [".H" scheme]]
     [default
+     ["._" evaluation]
      [phase
       ["._" translation
        [scheme