From aa4722d0c459a59ac896ef1b30ff0e141281d41c Mon Sep 17 00:00:00 2001
From: Eduardo Julian
Date: Sat, 21 May 2016 20:43:20 -0400
Subject: - Merged _lux_alias into _lux_import.

---
 src/lux/analyser.clj        | 12 +++---------
 src/lux/analyser/lux.clj    | 13 +++++--------
 src/lux/analyser/module.clj | 31 ++++++++++++++++++-------------
 3 files changed, 26 insertions(+), 30 deletions(-)

diff --git a/src/lux/analyser.clj b/src/lux/analyser.clj
index 73d89e036..c5993ce83 100644
--- a/src/lux/analyser.clj
+++ b/src/lux/analyser.clj
@@ -152,18 +152,12 @@
             (&/with-cursor cursor
               (&&lux/analyse-def analyse optimize eval! compile-def ?name ?value ?meta)))
 
-          "_lux_alias"
-          (|let [(&/$Cons [_ (&/$TextS ?alias)]
-                          (&/$Cons [_ (&/$TextS ?module)]
-                                   (&/$Nil))) parameters]
-            (&/with-cursor cursor
-              (&&lux/analyse-alias analyse ?alias ?module)))
-
           "_lux_import"
           (|let [(&/$Cons [_ (&/$TextS ?path)]
-                          (&/$Nil)) parameters]
+                          (&/$Cons [_ (&/$TextS ?alias)]
+                                   (&/$Nil))) parameters]
             (&/with-cursor cursor
-              (&&lux/analyse-import analyse compile-module ?path)))
+              (&&lux/analyse-import analyse compile-module ?path ?alias)))
 
           "_lux_program"
           (|let [(&/$Cons [_ (&/$SymbolS "" ?args)]
diff --git a/src/lux/analyser/lux.clj b/src/lux/analyser/lux.clj
index a0891371b..0ce5c060a 100644
--- a/src/lux/analyser/lux.clj
+++ b/src/lux/analyser/lux.clj
@@ -578,7 +578,7 @@
         (return &/$Nil))
       )))
 
-(defn analyse-import [analyse compile-module path]
+(defn analyse-import [analyse compile-module path ex-alias]
   (|do [_ &/ensure-statement
         module-name &/get-module-name
         _ (if (= module-name path)
@@ -591,15 +591,12 @@
            _ (&&module/add-import path)
            _ (if (not already-compiled?)
                (compile-module path)
-               (return nil))]
+               (return nil))
+           _ (if (= "" ex-alias)
+               (return nil)
+               (&&module/alias module-name ex-alias path))]
        (return &/$Nil)))))
 
-(defn analyse-alias [analyse ex-alias ex-module]
-  (|do [_ &/ensure-statement
-        module-name &/get-module-name
-        _ (&&module/alias module-name ex-alias ex-module)]
-    (return &/$Nil)))
-
 (defn ^:private coerce [new-type analysis]
   "(-> Type Analysis Analysis)"
   (|let [[[_type _cursor] _analysis] analysis]
diff --git a/src/lux/analyser/module.clj b/src/lux/analyser/module.clj
index 3ee9d28d4..4124503bd 100644
--- a/src/lux/analyser/module.clj
+++ b/src/lux/analyser/module.clj
@@ -137,19 +137,24 @@
 
 (defn alias [module alias reference]
   (fn [state]
-    (if-let [real-name (->> state (&/get$ &/$modules) (&/|get module) (&/get$ $module-aliases) (&/|get alias))]
-      ((&/fail-with-loc (str "[Analyser Error] Can't re-use alias \"" alias "\" @ " module))
-       state)
-      (return* (->> state
-                    (&/update$ &/$modules
-                               (fn [ms]
-                                 (&/|update module
-                                            #(&/update$ $module-aliases
-                                                        (fn [aliases]
-                                                          (&/|put alias reference aliases))
-                                                        %)
-                                            ms))))
-               nil))))
+    (let [_module_ (->> state (&/get$ &/$modules) (&/|get module))]
+      (if (&/|member? module (->> _module_ (&/get$ $imports)))
+        ((&/fail-with-loc (str "[Analyser Error] Can't create alias that is the same as a module nameL " (pr-str alias) " for " reference))
+         state)
+        (if-let [real-name (->> _module_ (&/get$ $module-aliases) (&/|get alias))]
+          ((&/fail-with-loc (str "[Analyser Error] Can't re-use alias \"" alias "\" @ " module))
+           state)
+          (return* (->> state
+                        (&/update$ &/$modules
+                                   (fn [ms]
+                                     (&/|update module
+                                                #(&/update$ $module-aliases
+                                                            (fn [aliases]
+                                                              (&/|put alias reference aliases))
+                                                            %)
+                                                ms))))
+                   nil))))
+    ))
 
 (defn find-def [module name]
   (|do [current-module &/get-module-name]
-- 
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