From 40f52c129697834cf0dad0f1f0d35ae6eb8a8528 Mon Sep 17 00:00:00 2001
From: Dag Sverre Seljebotn <dagss@student.matnat.uio.no>
Date: Tue, 5 Aug 2008 14:25:31 +0200
Subject: [PATCH] Treating cython: comments as regular comments when not at top

---
 Cython/Compiler/Lexicon.py  | 4 ++--
 Cython/Compiler/Parsing.py  | 3 +--
 Cython/Compiler/Scanning.py | 8 ++++++++
 tests/compile/c_options.pyx | 3 +++
 tests/errors/e_options.pyx  | 1 -
 5 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/Cython/Compiler/Lexicon.py b/Cython/Compiler/Lexicon.py
index f1282c87..8fe3724f 100644
--- a/Cython/Compiler/Lexicon.py
+++ b/Cython/Compiler/Lexicon.py
@@ -97,13 +97,13 @@ def make_lexicon():
         #(stringlit, 'STRING'),
         (beginstring, Method('begin_string_action')),
         
-        (option_comment, 'option_comment'),
+        (option_comment, Method('option_comment')),
         (comment, IGNORE),
         (spaces, IGNORE),
         (escaped_newline, IGNORE),
         
         State('INDENT', [
-            (option_comment + lineterm, 'option_comment'),
+            (option_comment + lineterm, Method('option_comment')),
             (Opt(spaces) + Opt(comment) + lineterm, IGNORE),
             (indentation, Method('indentation_action')),
             (Eof, Method('eof_action'))
diff --git a/Cython/Compiler/Parsing.py b/Cython/Compiler/Parsing.py
index 908a91c6..731116b2 100644
--- a/Cython/Compiler/Parsing.py
+++ b/Cython/Compiler/Parsing.py
@@ -507,8 +507,6 @@ def p_atom(s):
     elif sy == 'NULL':
         s.next()
         return ExprNodes.NullNode(pos)
-    elif sy == 'option_comment':
-        s.error("#cython option comments only allowed at beginning of file")
     else:
         s.error("Expected an identifier or literal")
 
@@ -2342,6 +2340,7 @@ def p_module(s, pxd, full_module_name):
         level = 'module'
 
     option_comments = p_option_comments(s)
+    s.parse_option_comments = False
     body = p_statement_list(s, Ctx(level = level), first_statement = 1)
     if s.sy != 'EOF':
         s.error("Syntax error in statement [%s,%s]" % (
diff --git a/Cython/Compiler/Scanning.py b/Cython/Compiler/Scanning.py
index ee01e08f..bdf7eb4b 100644
--- a/Cython/Compiler/Scanning.py
+++ b/Cython/Compiler/Scanning.py
@@ -303,6 +303,7 @@ class PyrexScanner(Scanner):
             self.compile_time_env = initial_compile_time_env()
             self.compile_time_eval = 1
             self.compile_time_expr = 0
+        self.parse_option_comments = True
         self.source_encoding = source_encoding
         self.trace = trace_scanner
         self.indentation_stack = [0]
@@ -311,6 +312,13 @@ class PyrexScanner(Scanner):
         self.begin('INDENT')
         self.sy = ''
         self.next()
+
+    def option_comment(self, text):
+        # #cython:-comments should be treated as literals until
+        # parse_option_comments is set to False, at which point
+        # they should be ignored.
+        if self.parse_option_comments:
+            self.produce('option_comment', text)    
     
     def current_level(self):
         return self.indentation_stack[-1]
diff --git a/tests/compile/c_options.pyx b/tests/compile/c_options.pyx
index e653a284..8f7dac7c 100644
--- a/tests/compile/c_options.pyx
+++ b/tests/compile/c_options.pyx
@@ -10,6 +10,9 @@ def f(object[int, 2] buf):
 
 @cy.boundscheck(True)
 def g(object[int, 2] buf):
+    # Please leave this comment, 
+#cython: this should have no special meaning
+    # even if the above line doesn't follow indentation.
     print buf[3, 2]
 
 def h(object[int, 2] buf):
diff --git a/tests/errors/e_options.pyx b/tests/errors/e_options.pyx
index a100e4cc..0c82adc8 100644
--- a/tests/errors/e_options.pyx
+++ b/tests/errors/e_options.pyx
@@ -17,6 +17,5 @@ _ERRORS = u"""
 2:0: Expected "=" in option "nonexistant"
 3:0: Unknown option: "some"
 10:0: Must pass a boolean value for option "boundscheck"
-14:0: #cython option comments only allowed at beginning of file
 """
 
-- 
2.26.2