Move compile_string into the Engine class.

django/template/__init__.py

@@ -69,7 +69,7 @@ from django.template.base import (Context, FilterExpression, Lexer, Node,  # NOQ
     filter_raw_string)
 
 # Compiling templates
-from django.template.base import (compile_string, resolve_variable,  # NOQA
+from django.template.base import (resolve_variable,  # NOQA
     unescape_string_literal, generic_tag_compiler)
 
 # Library management
@@ -77,4 +77,4 @@ from django.template.base import (Library, add_to_builtins, builtins,  # NOQA
     get_library, get_templatetags_modules, get_text_list, import_library,
     libraries)
 
-__all__ = ('Template', 'Context', 'RequestContext', 'compile_string')
+__all__ = ('Template', 'Context', 'RequestContext')

django/template/base.py

@@ -135,7 +135,7 @@ class Template(object):
         if engine is None:
             from .engine import Engine
             engine = Engine.get_default()
-        self.nodelist = compile_string(template_string, origin)
+        self.nodelist = engine.compile_string(template_string, origin)
         self.name = name
         self.origin = origin
         self.engine = engine
@@ -165,18 +165,6 @@ class Template(object):
                 context.engine = None
 
 
-def compile_string(template_string, origin):
-    "Compiles template_string into NodeList ready for rendering"
-    if settings.TEMPLATE_DEBUG:
-        from django.template.debug import DebugLexer, DebugParser
-        lexer_class, parser_class = DebugLexer, DebugParser
-    else:
-        lexer_class, parser_class = Lexer, Parser
-    lexer = lexer_class(template_string, origin)
-    parser = parser_class(lexer.tokenize())
-    return parser.parse()
-
-
 class Token(object):
     def __init__(self, token_type, contents):
         # token_type must be TOKEN_TEXT, TOKEN_VAR, TOKEN_BLOCK or

django/template/engine.py

@@ -8,7 +8,7 @@ from django.utils.deprecation import RemovedInDjango20Warning
 from django.utils.functional import cached_property
 from django.utils.module_loading import import_string
 
-from .base import Context, Template, TemplateDoesNotExist
+from .base import Context, Lexer, Parser, Template, TemplateDoesNotExist
 
 
 _dirs_undefined = object()
@@ -200,3 +200,17 @@ class Engine(object):
                 continue
         # If we get here, none of the templates could be loaded
         raise TemplateDoesNotExist(', '.join(not_found))
+
+    def compile_string(self, template_string, origin):
+        """
+        Compiles template_string into a NodeList ready for rendering.
+        """
+        if settings.TEMPLATE_DEBUG:
+            from .debug import DebugLexer, DebugParser
+            lexer_class, parser_class = DebugLexer, DebugParser
+        else:
+            lexer_class, parser_class = Lexer, Parser
+        lexer = lexer_class(template_string, origin)
+        tokens = lexer.tokenize()
+        parser = parser_class(tokens)
+        return parser.parse()

docs/releases/1.8.txt

@@ -772,6 +772,8 @@ Miscellaneous
   delete a key if ``set()`` fails. This is necessary to ensure the ``cache_db``
   session store always fetches the most current session data.
 
+* Private API ``django.template.compile_string`` was removed.
+
 * Private APIs ``override_template_loaders`` and ``override_with_test_loader``
   in ``django.test.utils`` were removed. Override ``TEMPLATE_LOADERS`` with
   ``override_settings`` instead.