Merge pull request #42 from LuxLang/context_sensitive_macro_expansion

Context sensitive macro expansion

6 files changed, 35 insertions, 18 deletions

diff --git a/new-luxc/source/luxc/lang/analysis/case.lux b/new-luxc/source/luxc/lang/analysis/case.lux
index 16f775907..c40bb2ac3 100644
--- a/new-luxc/source/luxc/lang/analysis/case.lux
+++ b/new-luxc/source/luxc/lang/analysis/case.lux
@@ -214,7 +214,7 @@
                                              [nextA next]
                                              (wrap [(list) nextA]))
                                            (list.reverse matches))]
-              (wrap [(` ("lux case tuple" [(~@ memberP+)]))
+              (wrap [(` ("lux case tuple" [(~+ memberP+)]))
                      thenA])))
 
           _
@@ -250,12 +250,12 @@
                 (do macro.Monad<Meta>
                   [[testP nextA] (analyse-pattern #.None
                                                   (type.variant (list.drop (n/dec num-cases) flat-sum))
-                                                  (` [(~@ values)])
+                                                  (` [(~+ values)])
                                                   next)]
                   (wrap [(` ("lux case variant" (~ (code.nat idx)) (~ (code.nat num-cases)) (~ testP)))
                          nextA]))
                 (do macro.Monad<Meta>
-                  [[testP nextA] (analyse-pattern #.None case-type (` [(~@ values)]) next)]
+                  [[testP nextA] (analyse-pattern #.None case-type (` [(~+ values)]) next)]
                   (wrap [(` ("lux case variant" (~ (code.nat idx)) (~ (code.nat num-cases)) (~ testP)))
                          nextA])))
 
@@ -274,7 +274,7 @@
          [idx group variantT] (macro.resolve-tag tag)
          _ (&.with-type-env
              (tc.check inputT variantT))]
-        (analyse-pattern (#.Some (list.size group)) inputT (` ((~ (code.nat idx)) (~@ values))) next)))
+        (analyse-pattern (#.Some (list.size group)) inputT (` ((~ (code.nat idx)) (~+ values))) next)))
 
     _
     (&.throw Unrecognized-Pattern-Syntax (%code pattern))
diff --git a/new-luxc/source/luxc/lang/analysis/case/coverage.lux b/new-luxc/source/luxc/lang/analysis/case/coverage.lux
index 5d34387b4..ae72b47e4 100644
--- a/new-luxc/source/luxc/lang/analysis/case/coverage.lux
+++ b/new-luxc/source/luxc/lang/analysis/case/coverage.lux
@@ -71,7 +71,7 @@
 
     ## Tuple patterns can be exhaustive if there is exhaustiveness for all of
     ## their sub-patterns.
-    (^code ("lux case tuple" [(~@ subs)]))
+    (^code ("lux case tuple" [(~+ subs)]))
     (loop [subs subs]
       (case subs
         #.Nil
diff --git a/new-luxc/source/luxc/lang/analysis/expression.lux b/new-luxc/source/luxc/lang/analysis/expression.lux
index 0f3cdcf6e..1463e7ec5 100644
--- a/new-luxc/source/luxc/lang/analysis/expression.lux
+++ b/new-luxc/source/luxc/lang/analysis/expression.lux
@@ -74,7 +74,7 @@
                    (<analyser> analyse tag value)
 
                    _
-                   (<analyser> analyse tag (` [(~@ values)]))))
+                   (<analyser> analyse tag (` [(~+ values)]))))
                ([#.Nat structureA.analyse-sum]
                 [#.Tag structureA.analyse-tagged-sum])
 
diff --git a/new-luxc/source/luxc/lang/analysis/function.lux b/new-luxc/source/luxc/lang/analysis/function.lux
index 758acd681..a502a9d19 100644
--- a/new-luxc/source/luxc/lang/analysis/function.lux
+++ b/new-luxc/source/luxc/lang/analysis/function.lux
@@ -74,7 +74,7 @@
 
           (#.Function inputT outputT)
           (<| (:: @ map (function [[scope bodyA]]
-                          (` ("lux function" [(~@ (list/map code.int (variableL.environment scope)))]
+                          (` ("lux function" [(~+ (list/map code.int (variableL.environment scope)))]
                               (~ bodyA)))))
               &.with-scope
               ## Functions have access not only to their argument, but
diff --git a/new-luxc/source/luxc/lang/analysis/procedure/common.lux b/new-luxc/source/luxc/lang/analysis/procedure/common.lux
index b003edfa7..ecdcd0bfd 100644
--- a/new-luxc/source/luxc/lang/analysis/procedure/common.lux
+++ b/new-luxc/source/luxc/lang/analysis/procedure/common.lux
@@ -20,6 +20,7 @@
                         [".A" type]))))
 
 (exception: #export Incorrect-Procedure-Arity)
+(exception: #export Invalid-Syntax)
 
 ## [Utils]
 (type: #export Proc
@@ -80,7 +81,7 @@
 
 ## [Analysers]
 ## "lux is" represents reference/pointer equality.
-(def: (lux-is proc)
+(def: (lux//is proc)
   (-> Text Proc)
   (function [analyse eval args]
     (do macro.Monad<Meta>
@@ -90,7 +91,7 @@
 
 ## "lux try" provides a simple way to interact with the host platform's
 ## error-handling facilities.
-(def: (lux-try proc)
+(def: (lux//try proc)
   (-> Text Proc)
   (function [analyse eval args]
     (case args
@@ -127,6 +128,22 @@
       _
       (&.throw Incorrect-Procedure-Arity (wrong-arity proc +2 (list.size args))))))
 
+(def: (lux//in-module proc)
+  (-> Text Proc)
+  (function [analyse eval argsC+]
+    (case argsC+
+      (^ (list [_ (#.Text module-name)] exprC))
+      (&.with-current-module module-name
+        (analyse exprC))
+      
+      _
+      (&.throw Invalid-Syntax (format "Procedure: " proc "\n"
+                                      "   Inputs:" (|> argsC+
+                                                       list.enumerate
+                                                       (list/map (function [[idx argC]]
+                                                                   (format "\n  " (%n idx) " " (%code argC))))
+                                                       (text.join-with "")) "\n")))))
+
 (do-template [<name> <analyser>]
   [(def: (<name> proc)
      (-> Text Proc)
@@ -158,13 +175,14 @@
 (def: lux-procs
   Bundle
   (|> (dict.new text.Hash<Text>)
-      (install "is" lux-is)
-      (install "try" lux-try)
+      (install "is" lux//is)
+      (install "try" lux//try)
       (install "function" lux//function)
       (install "case" lux//case)
       (install "check" lux//check)
       (install "coerce" lux//coerce)
-      (install "check type" lux//check//type)))
+      (install "check type" lux//check//type)
+      (install "in-module" lux//in-module)))
 
 (def: io-procs
   Bundle
diff --git a/new-luxc/source/luxc/lang/analysis/structure.lux b/new-luxc/source/luxc/lang/analysis/structure.lux
index fb521d02e..ce678837e 100644
--- a/new-luxc/source/luxc/lang/analysis/structure.lux
+++ b/new-luxc/source/luxc/lang/analysis/structure.lux
@@ -156,10 +156,9 @@
         ## blurring the line between what was wanted (the separation)
         ## and what was analysed.
         [tailT tailC]
-        (do @
-          [g!tail (macro.gensym "tail")]
+        (macro.with-gensyms [g!tail]
           (&.with-type tailT
-            (analyse (` ("lux case" [(~@ tailC)]
+            (analyse (` ("lux case" [(~+ tailC)]
                          (~ g!tail)
                          (~ g!tail))))))
         ))))
@@ -170,7 +169,7 @@
     [expectedT macro.expected-type]
     (&.with-stacked-errors
       (function [_] (Cannot-Analyse-Tuple (format "      Type: " (%type expectedT) "\n"
-                                                  "Expression: " (%code (` [(~@ membersC)])))))
+                                                  "Expression: " (%code (` [(~+ membersC)])))))
       (case expectedT
         (#.Product _)
         (analyse-typed-product analyse membersC)
@@ -219,7 +218,7 @@
 
               _
               (&.throw Invalid-Tuple-Type (format "      Type: " (%type expectedT) "\n"
-                                                  "Expression: " (%code (` [(~@ membersC)]))))))
+                                                  "Expression: " (%code (` [(~+ membersC)]))))))
 
           _
           (case (type.apply (list inputT) funT)
@@ -232,7 +231,7 @@
         
         _
         (&.throw Invalid-Tuple-Type (format "      Type: " (%type expectedT) "\n"
-                                            "Expression: " (%code (` [(~@ membersC)]))))
+                                            "Expression: " (%code (` [(~+ membersC)]))))
         ))))
 
 (def: #export (analyse-tagged-sum analyse tag valueC)