remove progn in favor of do

docs/language/api.rst

@@ -289,10 +289,10 @@ conditional expression.
     {1: 2, 3: 6, 9: 18, 5: 10, 7: 14}
 
 
-do / progn
+do
 ----------
 
-``do`` and `progn` are used to evaluate each of their arguments and return the
+``do`` is used to evaluate each of its arguments and return the
 last one. Return values from every other than the last argument are discarded.
 It can be used in ``lambda`` or ``list-comp`` to perform more complex logic as
 shown in one of the following examples.

hy/compiler.py

@@ -748,8 +748,7 @@ class HyASTCompiler(object):
         return ret
 
     @builds("do")
-    @builds("progn")
-    def compile_progn(self, expression):
+    def compile_do(self, expression):
         expression.pop(0)
         return self._compile_branch(expression)
 
@@ -2371,7 +2370,7 @@ class HyASTCompiler(object):
 
     @builds("eval_and_compile")
     def compile_eval_and_compile(self, expression):
-        expression[0] = HySymbol("progn")
+        expression[0] = HySymbol("do")
         hy.importer.hy_eval(expression,
                             compile_time_ns(self.module_name),
                             self.module_name)
@@ -2380,7 +2379,7 @@ class HyASTCompiler(object):
 
     @builds("eval_when_compile")
     def compile_eval_when_compile(self, expression):
-        expression[0] = HySymbol("progn")
+        expression[0] = HySymbol("do")
         hy.importer.hy_eval(expression,
                             compile_time_ns(self.module_name),
                             self.module_name)

hy/contrib/meth.hy

@@ -7,7 +7,7 @@
                                     {"methods" ~methods})]]
                  (with-decorator deco
                    (defn ~name ~params 
-                     (progn ~@code)))))
+                     (do ~@code)))))
 
 ;; Some macro examples
 (defmacro route [name path params &rest code]