2 # (C) Copyright IBM Corporation 2004, 2005
5 # Permission is hereby granted, free of charge, to any person obtaining a
6 # copy of this software and associated documentation files (the "Software"),
7 # to deal in the Software without restriction, including without limitation
8 # on the rights to use, copy, modify, merge, publish, distribute, sub
9 # license, and/or sell copies of the Software, and to permit persons to whom
10 # the Software is furnished to do so, subject to the following conditions:
12 # The above copyright notice and this permission notice (including the next
13 # paragraph) shall be included in all copies or substantial portions of the
16 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 # FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 # IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
25 # Ian Romanick <idr@us.ibm.com>
27 from __future__
import print_function
29 from collections
import OrderedDict
30 from decimal
import Decimal
31 import xml
.etree
.ElementTree
as ET
38 def parse_GL_API( file_name
, factory
= None ):
41 factory
= gl_item_factory()
43 api
= factory
.create_api()
44 api
.parse_file( file_name
)
46 # After the XML has been processed, we need to go back and assign
47 # dispatch offsets to the functions that request that their offsets
48 # be assigned by the scripts. Typically this means all functions
49 # that are not part of the ABI.
51 for func
in api
.functionIterateByCategory():
52 if func
.assign_offset
and func
.offset
< 0:
53 func
.offset
= api
.next_offset
;
59 def is_attr_true( element
, name
, default
= "false" ):
60 """Read a name value from an element's attributes.
62 The value read from the attribute list must be either 'true' or
63 'false'. If the value is 'false', zero will be returned. If the
64 value is 'true', non-zero will be returned. An exception will be
65 raised for any other value."""
67 value
= element
.get( name
, default
)
70 elif value
== "false":
73 raise RuntimeError('Invalid value "%s" for boolean "%s".' % (value
, name
))
76 class gl_print_base(object):
77 """Base class of all API pretty-printers.
79 In the model-view-controller pattern, this is the view. Any derived
80 class will want to over-ride the printBody, printRealHader, and
81 printRealFooter methods. Some derived classes may want to over-ride
82 printHeader and printFooter, or even Print (though this is unlikely).
86 # Name of the script that is generating the output file.
87 # Every derived class should set this to the name of its
93 # License on the *generated* source file. This may differ
94 # from the license on the script that is generating the file.
95 # Every derived class should set this to some reasonable
98 # See license.py for an example of a reasonable value.
100 self
.license
= "The license for this file is unspecified."
103 # The header_tag is the name of the C preprocessor define
104 # used to prevent multiple inclusion. Typically only
105 # generated C header files need this to be set. Setting it
106 # causes code to be generated automatically in printHeader
109 self
.header_tag
= None
112 # List of file-private defines that must be undefined at the
113 # end of the file. This can be used in header files to define
114 # names for use in the file, then undefine them at the end of
121 def Print(self
, api
):
128 def printHeader(self
):
129 """Print the header associated with all files and call the printRealHeader method."""
131 print('/* DO NOT EDIT - This file generated automatically by %s script */' \
135 print((' * ' + self
.license
.replace('\n', '\n * ')).replace(' \n', '\n'))
139 print('#if !defined( %s )' % (self
.header_tag
))
140 print('# define %s' % (self
.header_tag
))
142 self
.printRealHeader();
146 def printFooter(self
):
147 """Print the header associated with all files and call the printRealFooter method."""
149 self
.printRealFooter()
153 for u
in self
.undef_list
:
154 print("# undef %s" % (u
))
158 print('#endif /* !defined( %s ) */' % (self
.header_tag
))
161 def printRealHeader(self
):
162 """Print the "real" header for the created file.
164 In the base class, this function is empty. All derived
165 classes should over-ride this function."""
169 def printRealFooter(self
):
170 """Print the "real" footer for the created file.
172 In the base class, this function is empty. All derived
173 classes should over-ride this function."""
178 """Conditionally define `PURE' function attribute.
180 Conditionally defines a preprocessor macro `PURE' that wraps
181 GCC's `pure' function attribute. The conditional code can be
182 easilly adapted to other compilers that support a similar
185 The name is also added to the file's undef_list.
187 self
.undef_list
.append("PURE")
188 print("""# if defined(__GNUC__) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
189 # define PURE __attribute__((pure))
196 def printFastcall(self
):
197 """Conditionally define `FASTCALL' function attribute.
199 Conditionally defines a preprocessor macro `FASTCALL' that
200 wraps GCC's `fastcall' function attribute. The conditional
201 code can be easilly adapted to other compilers that support a
204 The name is also added to the file's undef_list.
207 self
.undef_list
.append("FASTCALL")
208 print("""# if defined(__i386__) && defined(__GNUC__) && !defined(__CYGWIN__) && !defined(__MINGW32__)
209 # define FASTCALL __attribute__((fastcall))
216 def printVisibility(self
, S
, s
):
217 """Conditionally define visibility function attribute.
219 Conditionally defines a preprocessor macro name S that wraps
220 GCC's visibility function attribute. The visibility used is
221 the parameter s. The conditional code can be easilly adapted
222 to other compilers that support a similar feature.
224 The name is also added to the file's undef_list.
227 self
.undef_list
.append(S
)
228 print("""# if defined(__GNUC__) && !defined(__CYGWIN__) && !defined(__MINGW32__)
229 # define %s __attribute__((visibility("%s")))
232 # endif""" % (S
, s
, S
))
236 def printNoinline(self
):
237 """Conditionally define `NOINLINE' function attribute.
239 Conditionally defines a preprocessor macro `NOINLINE' that
240 wraps GCC's `noinline' function attribute. The conditional
241 code can be easilly adapted to other compilers that support a
244 The name is also added to the file's undef_list.
247 self
.undef_list
.append("NOINLINE")
248 print("""# if defined(__GNUC__)
249 # define NOINLINE __attribute__((noinline))
256 def real_function_name(element
):
257 name
= element
.get( "name" )
258 alias
= element
.get( "alias" )
266 def real_category_name(c
):
267 if re
.compile("[1-9][0-9]*[.][0-9]+").match(c
):
268 return "GL_VERSION_" + c
.replace(".", "_")
273 def classify_category(name
, number
):
274 """Based on the category name and number, select a numerical class for it.
276 Categories are divided into four classes numbered 0 through 3. The
279 0. Core GL versions, sorted by version number.
280 1. ARB extensions, sorted by extension number.
281 2. Non-ARB extensions, sorted by extension number.
282 3. Un-numbered extensions, sorted by extension name.
286 core_version
= float(name
)
290 if core_version
> 0.0:
293 elif name
.startswith("GL_ARB_") or name
.startswith("GLX_ARB_") or name
.startswith("WGL_ARB_"):
305 return [cat_type
, key
]
308 def create_parameter_string(parameters
, include_names
):
309 """Create a parameter string from a list of gl_parameters."""
317 list.append( p
.string() )
319 list.append( p
.type_string() )
321 if len(list) == 0: list = ["void"]
323 return ", ".join(list)
326 class gl_item(object):
327 def __init__(self
, element
, context
, category
):
328 self
.context
= context
329 self
.name
= element
.get( "name" )
330 self
.category
= real_category_name( category
)
335 class gl_type( gl_item
):
336 def __init__(self
, element
, context
, category
):
337 gl_item
.__init
__(self
, element
, context
, category
)
338 self
.size
= int( element
.get( "size" ), 0 )
340 te
= typeexpr
.type_expression( None )
341 tn
= typeexpr
.type_node()
342 tn
.size
= int( element
.get( "size" ), 0 )
343 tn
.integer
= not is_attr_true( element
, "float" )
344 tn
.unsigned
= is_attr_true( element
, "unsigned" )
345 tn
.pointer
= is_attr_true( element
, "pointer" )
346 tn
.name
= "GL" + self
.name
347 te
.set_base_type_node( tn
)
353 def get_type_expression(self
):
354 return self
.type_expr
357 class gl_enum( gl_item
):
358 def __init__(self
, element
, context
, category
):
359 gl_item
.__init
__(self
, element
, context
, category
)
360 self
.value
= int( element
.get( "value" ), 0 )
362 temp
= element
.get( "count" )
363 if not temp
or temp
== "?":
364 self
.default_count
= -1
369 raise RuntimeError('Invalid count value "%s" for enum "%s" in function "%s" when an integer was expected.' % (temp
, self
.name
, n
))
371 self
.default_count
= c
377 """Calculate a 'priority' for this enum name.
379 When an enum is looked up by number, there may be many
380 possible names, but only one is the 'prefered' name. The
381 priority is used to select which name is the 'best'.
383 Highest precedence is given to core GL name. ARB extension
384 names have the next highest, followed by EXT extension names.
385 Vendor extension names are the lowest.
388 if self
.name
.endswith( "_BIT" ):
393 if self
.category
.startswith( "GL_VERSION_" ):
395 elif self
.category
.startswith( "GL_ARB_" ):
397 elif self
.category
.startswith( "GL_EXT_" ):
402 return priority
+ bias
406 class gl_parameter(object):
407 def __init__(self
, element
, context
):
408 self
.name
= element
.get( "name" )
410 ts
= element
.get( "type" )
411 self
.type_expr
= typeexpr
.type_expression( ts
, context
)
413 temp
= element
.get( "variable_param" )
415 self
.count_parameter_list
= temp
.split( ' ' )
417 self
.count_parameter_list
= []
419 # The count tag can be either a numeric string or the name of
420 # a variable. If it is the name of a variable, the int(c)
421 # statement will throw an exception, and the except block will
424 c
= element
.get( "count" )
434 self
.count_scale
= int(element
.get( "count_scale", "1" ))
436 elements
= (count
* self
.count_scale
)
440 #if ts == "GLdouble":
441 # print '/* stack size -> %s = %u (before)*/' % (self.name, self.type_expr.get_stack_size())
442 # print '/* # elements = %u */' % (elements)
443 self
.type_expr
.set_elements( elements
)
444 #if ts == "GLdouble":
445 # print '/* stack size -> %s = %u (after) */' % (self.name, self.type_expr.get_stack_size())
447 self
.is_client_only
= is_attr_true( element
, 'client_only' )
448 self
.is_counter
= is_attr_true( element
, 'counter' )
449 self
.is_output
= is_attr_true( element
, 'output' )
452 # Pixel data has special parameters.
454 self
.width
= element
.get('img_width')
455 self
.height
= element
.get('img_height')
456 self
.depth
= element
.get('img_depth')
457 self
.extent
= element
.get('img_extent')
459 self
.img_xoff
= element
.get('img_xoff')
460 self
.img_yoff
= element
.get('img_yoff')
461 self
.img_zoff
= element
.get('img_zoff')
462 self
.img_woff
= element
.get('img_woff')
464 self
.img_format
= element
.get('img_format')
465 self
.img_type
= element
.get('img_type')
466 self
.img_target
= element
.get('img_target')
468 self
.img_pad_dimensions
= is_attr_true( element
, 'img_pad_dimensions' )
469 self
.img_null_flag
= is_attr_true( element
, 'img_null_flag' )
470 self
.img_send_null
= is_attr_true( element
, 'img_send_null' )
472 self
.is_padding
= is_attr_true( element
, 'padding' )
476 def compatible(self
, other
):
481 return self
.is_pointer()
484 def is_pointer(self
):
485 return self
.type_expr
.is_pointer()
495 def is_variable_length(self
):
496 return len(self
.count_parameter_list
) or self
.counter
500 count
= self
.type_expr
.get_element_count()
502 if (self
.size() / count
) == 8:
512 return self
.type_expr
.original_string
+ " " + self
.name
515 def type_string(self
):
516 return self
.type_expr
.original_string
519 def get_base_type_string(self
):
520 return self
.type_expr
.get_base_name()
523 def get_dimensions(self
):
525 return [ 0, "0", "0", "0", "0" ]
545 return [ dim
, w
, h
, d
, e
]
548 def get_stack_size(self
):
549 return self
.type_expr
.get_stack_size()
556 return self
.type_expr
.get_element_size()
559 def get_element_count(self
):
560 c
= self
.type_expr
.get_element_count()
567 def size_string(self
, use_parens
= 1):
569 if self
.counter
or self
.count_parameter_list
:
570 list = [ "compsize" ]
572 if self
.counter
and self
.count_parameter_list
:
573 list.append( self
.counter
)
575 list = [ self
.counter
]
578 list.append( str(s
) )
580 if len(list) > 1 and use_parens
:
581 return "safe_mul(%s)" % ", ".join(list)
583 return " * ".join(list)
585 elif self
.is_image():
591 def format_string(self
):
592 if self
.type_expr
.original_string
== "GLenum":
595 return self
.type_expr
.format_string()
598 class gl_function( gl_item
):
599 def __init__(self
, element
, context
):
600 self
.context
= context
603 self
.entry_points
= []
604 self
.return_type
= "void"
609 self
.exec_flavor
= 'mesa'
611 self
.deprecated
= None
612 self
.has_no_error_variant
= False
614 # self.api_map[api] is a decimal value indicating the earliest
615 # version of the given API in which ANY alias for the function
616 # exists. The map only lists APIs which contain the function
617 # in at least one version. For example, for the ClipPlanex
618 # function, self.api_map == { 'es1':
622 self
.assign_offset
= False
624 self
.static_entry_points
= []
626 # Track the parameter string (for the function prototype)
627 # for each entry-point. This is done because some functions
628 # change their prototype slightly when promoted from extension
629 # to ARB extension to core. glTexImage3DEXT and glTexImage3D
630 # are good examples of this. Scripts that need to generate
631 # code for these differing aliases need to real prototype
632 # for each entry-point. Otherwise, they may generate code
633 # that won't compile.
635 self
.entry_point_parameters
= {}
637 self
.process_element( element
)
642 def process_element(self
, element
):
643 name
= element
.get( "name" )
644 alias
= element
.get( "alias" )
646 if name
in static_data
.functions
:
647 self
.static_entry_points
.append(name
)
649 self
.entry_points
.append( name
)
651 for api
in ('es1', 'es2'):
652 version_str
= element
.get(api
, 'none')
653 assert version_str
is not None
654 if version_str
!= 'none':
655 version_decimal
= Decimal(version_str
)
656 if api
not in self
.api_map
or \
657 version_decimal
< self
.api_map
[api
]:
658 self
.api_map
[api
] = version_decimal
660 exec_flavor
= element
.get('exec')
662 self
.exec_flavor
= exec_flavor
664 deprecated
= element
.get('deprecated', 'none')
665 if deprecated
!= 'none':
666 self
.deprecated
= Decimal(deprecated
)
668 if not is_attr_true(element
, 'desktop', 'true'):
671 if self
.has_no_error_variant
or is_attr_true(element
, 'no_error'):
672 self
.has_no_error_variant
= True
674 self
.has_no_error_variant
= False
681 # Only try to set the offset when a non-alias entry-point
682 # is being processed.
684 if name
in static_data
.offsets
and static_data
.offsets
[name
] <= static_data
.MAX_OFFSETS
:
685 self
.offset
= static_data
.offsets
[name
]
686 elif name
in static_data
.offsets
and static_data
.offsets
[name
] > static_data
.MAX_OFFSETS
:
687 self
.offset
= static_data
.offsets
[name
]
688 self
.assign_offset
= True
690 if self
.exec_flavor
!= "skip":
691 raise RuntimeError("Entry-point %s is missing offset in static_data.py. Add one at the bottom of the list." % (name
))
692 self
.assign_offset
= self
.exec_flavor
!= "skip" or name
in static_data
.unused_functions
695 self
.name
= true_name
696 elif self
.name
!= true_name
:
697 raise RuntimeError("Function true name redefined. Was %s, now %s." % (self
.name
, true_name
))
700 # There are two possible cases. The first time an entry-point
701 # with data is seen, self.initialized will be 0. On that
702 # pass, we just fill in the data. The next time an
703 # entry-point with data is seen, self.initialized will be 1.
704 # On that pass we have to make that the new values match the
705 # valuse from the previous entry-point.
709 for child
in element
.getchildren():
710 if child
.tag
== "return":
711 return_type
= child
.get( "type", "void" )
712 elif child
.tag
== "param":
713 param
= self
.context
.factory
.create_parameter(child
, self
.context
)
714 parameters
.append( param
)
718 if self
.return_type
!= return_type
:
719 raise RuntimeError( "Return type changed in %s. Was %s, now %s." % (name
, self
.return_type
, return_type
))
721 if len(parameters
) != len(self
.parameters
):
722 raise RuntimeError( "Parameter count mismatch in %s. Was %d, now %d." % (name
, len(self
.parameters
), len(parameters
)))
724 for j
in range(0, len(parameters
)):
726 p2
= self
.parameters
[j
]
727 if not p1
.compatible( p2
):
728 raise RuntimeError( 'Parameter type mismatch in %s. "%s" was "%s", now "%s".' % (name
, p2
.name
, p2
.type_expr
.original_string
, p1
.type_expr
.original_string
))
731 if true_name
== name
or not self
.initialized
:
732 self
.return_type
= return_type
733 self
.parameters
= parameters
735 for param
in self
.parameters
:
737 self
.images
.append( param
)
739 if element
.getchildren():
741 self
.entry_point_parameters
[name
] = parameters
743 self
.entry_point_parameters
[name
] = []
747 def filter_entry_points(self
, entry_point_list
):
748 """Filter out entry points not in entry_point_list."""
749 if not self
.initialized
:
750 raise RuntimeError('%s is not initialized yet' % self
.name
)
753 for ent
in self
.entry_points
:
754 if ent
not in entry_point_list
:
755 if ent
in self
.static_entry_points
:
756 self
.static_entry_points
.remove(ent
)
757 self
.entry_point_parameters
.pop(ent
)
759 entry_points
.append(ent
)
762 raise RuntimeError('%s has no entry point after filtering' % self
.name
)
764 self
.entry_points
= entry_points
765 if self
.name
not in entry_points
:
766 # use the first remaining entry point
767 self
.name
= entry_points
[0]
768 self
.parameters
= self
.entry_point_parameters
[entry_points
[0]]
770 def get_images(self
):
771 """Return potentially empty list of input images."""
775 def parameterIterator(self
, name
= None):
777 return iter(self
.entry_point_parameters
[name
]);
779 return iter(self
.parameters
);
782 def get_parameter_string(self
, entrypoint
= None):
784 params
= self
.entry_point_parameters
[ entrypoint
]
786 params
= self
.parameters
788 return create_parameter_string( params
, 1 )
790 def get_called_parameter_string(self
):
794 for p
in self
.parameterIterator():
797 p_string
= p_string
+ comma
+ p
.name
804 return (self
.offset
>= 0 and not self
.assign_offset
)
806 def is_static_entry_point(self
, name
):
807 return name
in self
.static_entry_points
809 def dispatch_name(self
):
810 if self
.name
in self
.static_entry_points
:
813 return "_dispatch_stub_%u" % (self
.offset
)
815 def static_name(self
, name
):
816 if name
in self
.static_entry_points
:
819 return "_dispatch_stub_%u" % (self
.offset
)
821 class gl_item_factory(object):
822 """Factory to create objects derived from gl_item."""
824 def create_function(self
, element
, context
):
825 return gl_function(element
, context
)
827 def create_type(self
, element
, context
, category
):
828 return gl_type(element
, context
, category
)
830 def create_enum(self
, element
, context
, category
):
831 return gl_enum(element
, context
, category
)
833 def create_parameter(self
, element
, context
):
834 return gl_parameter(element
, context
)
836 def create_api(self
):
840 class gl_api(object):
841 def __init__(self
, factory
):
842 self
.functions_by_name
= OrderedDict()
843 self
.enums_by_name
= {}
844 self
.types_by_name
= {}
846 self
.category_dict
= {}
847 self
.categories
= [{}, {}, {}, {}]
849 self
.factory
= factory
853 typeexpr
.create_initial_types()
856 def parse_file(self
, file_name
):
857 doc
= ET
.parse( file_name
)
858 self
.process_element(file_name
, doc
)
861 def process_element(self
, file_name
, doc
):
862 element
= doc
.getroot()
863 if element
.tag
== "OpenGLAPI":
864 self
.process_OpenGLAPI(file_name
, element
)
868 def process_OpenGLAPI(self
, file_name
, element
):
869 for child
in element
.getchildren():
870 if child
.tag
== "category":
871 self
.process_category( child
)
872 elif child
.tag
== "OpenGLAPI":
873 self
.process_OpenGLAPI( file_name
, child
)
874 elif child
.tag
== '{http://www.w3.org/2001/XInclude}include':
875 href
= child
.get('href')
876 href
= os
.path
.join(os
.path
.dirname(file_name
), href
)
877 self
.parse_file(href
)
882 def process_category(self
, cat
):
883 cat_name
= cat
.get( "name" )
884 cat_number
= cat
.get( "number" )
886 [cat_type
, key
] = classify_category(cat_name
, cat_number
)
887 self
.categories
[cat_type
][key
] = [cat_name
, cat_number
]
889 for child
in cat
.getchildren():
890 if child
.tag
== "function":
891 func_name
= real_function_name( child
)
893 temp_name
= child
.get( "name" )
894 self
.category_dict
[ temp_name
] = [cat_name
, cat_number
]
896 if func_name
in self
.functions_by_name
:
897 func
= self
.functions_by_name
[ func_name
]
898 func
.process_element( child
)
900 func
= self
.factory
.create_function( child
, self
)
901 self
.functions_by_name
[ func_name
] = func
903 if func
.offset
>= self
.next_offset
:
904 self
.next_offset
= func
.offset
+ 1
907 elif child
.tag
== "enum":
908 enum
= self
.factory
.create_enum( child
, self
, cat_name
)
909 self
.enums_by_name
[ enum
.name
] = enum
910 elif child
.tag
== "type":
911 t
= self
.factory
.create_type( child
, self
, cat_name
)
912 self
.types_by_name
[ "GL" + t
.name
] = t
917 def functionIterateByCategory(self
, cat
= None):
918 """Iterate over functions by category.
920 If cat is None, all known functions are iterated in category
921 order. See classify_category for details of the ordering.
922 Within a category, functions are sorted by name. If cat is
923 not None, then only functions in that category are iterated.
925 lists
= [{}, {}, {}, {}]
927 for func
in self
.functionIterateAll():
928 [cat_name
, cat_number
] = self
.category_dict
[func
.name
]
930 if (cat
== None) or (cat
== cat_name
):
931 [func_cat_type
, key
] = classify_category(cat_name
, cat_number
)
933 if key
not in lists
[func_cat_type
]:
934 lists
[func_cat_type
][key
] = {}
936 lists
[func_cat_type
][key
][func
.name
] = func
940 for func_cat_type
in range(0,4):
941 keys
= sorted(lists
[func_cat_type
].keys())
944 names
= sorted(lists
[func_cat_type
][key
].keys())
947 functions
.append(lists
[func_cat_type
][key
][name
])
949 return iter(functions
)
952 def functionIterateByOffset(self
):
954 for func
in self
.functions_by_name
.values():
955 if func
.offset
> max_offset
:
956 max_offset
= func
.offset
959 temp
= [None for i
in range(0, max_offset
+ 1)]
960 for func
in self
.functions_by_name
.values():
961 if func
.offset
!= -1:
962 temp
[ func
.offset
] = func
966 for i
in range(0, max_offset
+ 1):
973 def functionIterateAll(self
):
974 return self
.functions_by_name
.values()
977 def enumIterateByName(self
):
978 keys
= sorted(self
.enums_by_name
.keys())
982 list.append( self
.enums_by_name
[ enum
] )
987 def categoryIterate(self
):
988 """Iterate over categories.
990 Iterate over all known categories in the order specified by
991 classify_category. Each iterated value is a tuple of the
992 name and number (which may be None) of the category.
996 for cat_type
in range(0,4):
997 keys
= sorted(self
.categories
[cat_type
].keys())
1000 list.append(self
.categories
[cat_type
][key
])
1005 def get_category_for_name( self
, name
):
1006 if name
in self
.category_dict
:
1007 return self
.category_dict
[name
]
1009 return ["<unknown category>", None]
1012 def typeIterate(self
):
1013 return self
.types_by_name
.values()
1016 def find_type( self
, type_name
):
1017 if type_name
in self
.types_by_name
:
1018 return self
.types_by_name
[ type_name
].type_expr
1020 print("Unable to find base type matching \"%s\"." % (type_name
))