From 19db9de9d3cdf1f4d09ebf89bc50362ab86ac06c Mon Sep 17 00:00:00 2001
From: Anthon van der Neut <anthon@mnt.org>
Date: Mon, 5 Dec 2016 18:06:24 +0100
Subject: another fix for 82, non-global resolver data for 1.2 (from 0.12.17)

---
 resolver.py | 31 ++++++++++++++++++++++---------
 1 file changed, 22 insertions(+), 9 deletions(-)

(limited to 'resolver.py')

diff --git a/resolver.py b/resolver.py
index 58fd975..9902a29 100644
--- a/resolver.py
+++ b/resolver.py
@@ -105,6 +105,19 @@ class BaseResolver(object):
         self.resolver_exact_paths = []
         self.resolver_prefix_paths = []
 
+    @classmethod
+    def add_implicit_resolver_base(cls, tag, regexp, first):
+        # type: (Any, Any, Any) -> None
+        if 'yaml_implicit_resolvers' not in cls.__dict__:
+            # deepcopy doesn't work here
+            cls.yaml_implicit_resolvers = dict((k, cls.yaml_implicit_resolvers[k][:])
+                                               for k in cls.yaml_implicit_resolvers)
+        if first is None:
+            first = [None]
+        for ch in first:
+            cls.yaml_implicit_resolvers.setdefault(ch, []).append(
+                (tag, regexp))
+
     @classmethod
     def add_implicit_resolver(cls, tag, regexp, first):
         # type: (Any, Any, Any) -> None
@@ -113,11 +126,11 @@ class BaseResolver(object):
             cls.yaml_implicit_resolvers = dict((k, cls.yaml_implicit_resolvers[k][:])
                                                for k in cls.yaml_implicit_resolvers)
         if first is None:
-            implicit_resolvers.append(([(1, 2), (1, 1)], tag, regexp, first))
             first = [None]
         for ch in first:
             cls.yaml_implicit_resolvers.setdefault(ch, []).append(
                 (tag, regexp))
+        implicit_resolvers.append(([(1, 2), (1, 1)], tag, regexp, first))
 
     # @classmethod
     # def add_implicit_resolver(cls, tag, regexp, first):
@@ -262,14 +275,14 @@ class BaseResolver(object):
 class Resolver(BaseResolver):
     pass
 
-Resolver.add_implicit_resolver(
+Resolver.add_implicit_resolver_base(
     u'tag:yaml.org,2002:bool',
     re.compile(u'''^(?:yes|Yes|YES|no|No|NO
     |true|True|TRUE|false|False|FALSE
     |on|On|ON|off|Off|OFF)$''', re.X),
     list(u'yYnNtTfFoO'))
 
-Resolver.add_implicit_resolver(
+Resolver.add_implicit_resolver_base(
     u'tag:yaml.org,2002:float',
     re.compile(u'''^(?:
      [-+]?(?:[0-9][0-9_]*)\\.[0-9_]*(?:[eE][-+]?[0-9]+)?
@@ -280,7 +293,7 @@ Resolver.add_implicit_resolver(
     |\\.(?:nan|NaN|NAN))$''', re.X),
     list(u'-+0123456789.'))
 
-Resolver.add_implicit_resolver(
+Resolver.add_implicit_resolver_base(
     u'tag:yaml.org,2002:int',
     re.compile(u'''^(?:[-+]?0b[0-1_]+
     |[-+]?0o?[0-7_]+
@@ -289,19 +302,19 @@ Resolver.add_implicit_resolver(
     |[-+]?[1-9][0-9_]*(?::[0-5]?[0-9])+)$''', re.X),
     list(u'-+0123456789'))
 
-Resolver.add_implicit_resolver(
+Resolver.add_implicit_resolver_base(
     u'tag:yaml.org,2002:merge',
     re.compile(u'^(?:<<)$'),
     [u'<'])
 
-Resolver.add_implicit_resolver(
+Resolver.add_implicit_resolver_base(
     u'tag:yaml.org,2002:null',
     re.compile(u'''^(?: ~
     |null|Null|NULL
     | )$''', re.X),
     [u'~', u'n', u'N', u''])
 
-Resolver.add_implicit_resolver(
+Resolver.add_implicit_resolver_base(
     u'tag:yaml.org,2002:timestamp',
     re.compile(u'''^(?:[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]
     |[0-9][0-9][0-9][0-9] -[0-9][0-9]? -[0-9][0-9]?
@@ -310,14 +323,14 @@ Resolver.add_implicit_resolver(
     (?:[ \\t]*(?:Z|[-+][0-9][0-9]?(?::[0-9][0-9])?))?)$''', re.X),
     list(u'0123456789'))
 
-Resolver.add_implicit_resolver(
+Resolver.add_implicit_resolver_base(
     u'tag:yaml.org,2002:value',
     re.compile(u'^(?:=)$'),
     [u'='])
 
 # The following resolver is only for documentation purposes. It cannot work
 # because plain scalars cannot start with '!', '&', or '*'.
-Resolver.add_implicit_resolver(
+Resolver.add_implicit_resolver_base(
     u'tag:yaml.org,2002:yaml',
     re.compile(u'^(?:!|&|\\*)$'),
     list(u'!&*'))
-- 
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