# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1560287685 -7200
# Node ID 5c6b1b19c6f6c9ceee49d728a0027d1b0496289a
# Parent  018b653418f2435efb75fca2b284e079723fd881
Added an inline commentary of the "for" loop construct.

diff -r 018b653418f2 -r 5c6b1b19c6f6 common.py
--- a/common.py	Sat Jun 08 17:55:32 2019 +0200
+++ b/common.py	Tue Jun 11 23:14:45 2019 +0200
@@ -598,24 +598,47 @@
                 [compiler.ast.AssName(t2, "OP_ASSIGN")],
                 compiler.ast.Getattr(compiler.ast.Name(t1), "next")),
 
+            # try:
+
             compiler.ast.TryExcept(
+
+                # while True:
+
                 compiler.ast.While(
                     compiler.ast.Name("True"),
                     compiler.ast.Stmt([
+
+                        # try:
+
                         compiler.ast.TryExcept(
+
+                            # <t3> = <t2>()
+
                             compiler.ast.Assign(
                                 [compiler.ast.AssName(t3, "OP_ASSIGN")],
                                 compiler.ast.CallFunc(
                                     compiler.ast.Name(t2),
                                     [])),
+
+                        # except StopIteration:
+                        #     raise LoopExit
+
                             [(compiler.ast.Name("StopIteration"), None,
                               compiler.ast.Raise(compiler.ast.Name("LoopExit")))],
                             None),
+
+                        # <var>... = <t3>
+
                         compiler.ast.Assign(
                             [n.assign],
                             compiler.ast.Name(t3)),
                         n.body]),
                     None),
+
+            # except LoopExit:
+            #     {n.else_}
+            #     pass
+
                 [(compiler.ast.Name("LoopExit"), None, n.else_ or compiler.ast.Pass())],
                 None)
             ])