| 1 | """AST type definitions for Zephyr ASDL itself.
|
| 2 |
|
| 3 | This is not self-hosted! If it were, it would look something like this.
|
| 4 |
|
| 5 | TODO: move it toward this schema
|
| 6 |
|
| 7 | type_expr =
|
| 8 | NamedType(str name, asdl_type resolved)
|
| 9 | | ParameterizedType(str type_name, List[type_expr] children)
|
| 10 |
|
| 11 | Field = (type_expr typ, str name)
|
| 12 |
|
| 13 | Constructor = (List[Field] fields, str name, str shared_type)
|
| 14 |
|
| 15 | # TODO: use variant instead of constructor
|
| 16 | variant =
|
| 17 | Simple(str name)
|
| 18 | Compound(str name, List[fields])
|
| 19 | SharedVariant(str tag_name, str shared_variant)
|
| 20 |
|
| 21 | Use = (List[str] module_parts, str type_names)
|
| 22 | Extern = (List[str] names)
|
| 23 |
|
| 24 | asdl_type =
|
| 25 | Sum(List[Constructor] variants, List[str] generate)
|
| 26 | | SimpleSum() # This is just List[name]
|
| 27 | | Product(List[Field] fields)
|
| 28 |
|
| 29 | # These go in the TypeLookup dict!
|
| 30 | # Shouldn't they be a BINDING?
|
| 31 | | Use %Use
|
| 32 | | Extern %Extern
|
| 33 |
|
| 34 | binding =
|
| 35 | TypeDecl(str name, asdl_type value)
|
| 36 | | SubTypeDecl(str name, type_expr base_class)
|
| 37 |
|
| 38 | Module = (
|
| 39 | str name,
|
| 40 | List[Use] uses,
|
| 41 | List[Extern] externs,
|
| 42 | # Are Type and SubType ordered? Right now they are. C++ and Python may
|
| 43 | # differ in terms of order.
|
| 44 | List[binding] defs
|
| 45 | )
|
| 46 | """
|
| 47 | from __future__ import print_function
|
| 48 |
|
| 49 | import cStringIO
|
| 50 |
|
| 51 | from typing import List, Optional, Tuple, IO
|
| 52 |
|
| 53 |
|
| 54 | class _Printable(object):
|
| 55 |
|
| 56 | def Print(self, f, indent):
|
| 57 | # type: (IO[bytes], int) -> None
|
| 58 | raise NotImplementedError()
|
| 59 |
|
| 60 | def __str__(self):
|
| 61 | # type: () -> str
|
| 62 | f = cStringIO.StringIO()
|
| 63 | self.Print(f, 0)
|
| 64 | return f.getvalue()
|
| 65 |
|
| 66 |
|
| 67 | class asdl_type_t(_Printable):
|
| 68 | pass
|
| 69 |
|
| 70 |
|
| 71 | class DummyType(asdl_type_t):
|
| 72 | """
|
| 73 | Dummy value for subtyping: List_of_command < List[command]
|
| 74 |
|
| 75 | TODO: Improve this representation
|
| 76 | """
|
| 77 | pass
|
| 78 |
|
| 79 |
|
| 80 | class Use(asdl_type_t):
|
| 81 |
|
| 82 | def __init__(self, module_parts, type_names):
|
| 83 | # type: (List[str], List[str]) -> None
|
| 84 | self.module_parts = module_parts
|
| 85 | self.type_names = type_names
|
| 86 |
|
| 87 | def Print(self, f, indent):
|
| 88 | # type: (IO[bytes], int) -> None
|
| 89 | ind = indent * ' '
|
| 90 | f.write('%sUse %s {\n' % (ind, ' '.join(self.module_parts)))
|
| 91 | f.write(' %s%s\n' % (ind, ', '.join(t for t in self.type_names)))
|
| 92 | f.write('%s}\n' % ind)
|
| 93 |
|
| 94 |
|
| 95 | class Extern(asdl_type_t):
|
| 96 |
|
| 97 | def __init__(self, names):
|
| 98 | # type: (List[str]) -> None
|
| 99 | self.names = names
|
| 100 |
|
| 101 | def Print(self, f, indent):
|
| 102 | # type: (IO[bytes], int) -> None
|
| 103 | ind = indent * ' '
|
| 104 | f.write('%sExtern [ %s ]\n' % (ind, ' '.join(self.names)))
|
| 105 |
|
| 106 |
|
| 107 | class Module(_Printable):
|
| 108 |
|
| 109 | def __init__(self, name, uses, externs, dfns):
|
| 110 | # type: (str, List[Use], List[Extern], List[binding_t]) -> None
|
| 111 | self.name = name
|
| 112 | self.uses = uses
|
| 113 | self.externs = externs
|
| 114 | self.dfns = dfns
|
| 115 |
|
| 116 | def Print(self, f, indent):
|
| 117 | # type: (IO[bytes], int) -> None
|
| 118 | ind = indent * ' '
|
| 119 | f.write('%sModule %s {\n' % (ind, self.name))
|
| 120 |
|
| 121 | for u in self.uses:
|
| 122 | u.Print(f, indent + 1)
|
| 123 | f.write('\n')
|
| 124 |
|
| 125 | for e in self.externs:
|
| 126 | e.Print(f, indent + 1)
|
| 127 | f.write('\n')
|
| 128 |
|
| 129 | for d in self.dfns:
|
| 130 | d.Print(f, indent + 1)
|
| 131 | f.write('\n')
|
| 132 | f.write('%s}\n' % ind)
|
| 133 |
|
| 134 |
|
| 135 | class binding_t(_Printable):
|
| 136 | pass
|
| 137 |
|
| 138 |
|
| 139 | class TypeDecl(binding_t):
|
| 140 | """A binding of name to a Sum or Product type."""
|
| 141 |
|
| 142 | def __init__(self, name, value):
|
| 143 | # type: (str, asdl_type_t) -> None
|
| 144 | self.name = name
|
| 145 | self.value = value
|
| 146 |
|
| 147 | def Print(self, f, indent):
|
| 148 | # type: (IO[bytes], int) -> None
|
| 149 | ind = indent * ' '
|
| 150 | f.write('%sType %s {\n' % (ind, self.name))
|
| 151 | self.value.Print(f, indent + 1)
|
| 152 | f.write('%s}\n' % ind)
|
| 153 |
|
| 154 |
|
| 155 | class SubTypeDecl(binding_t):
|
| 156 | """A declaration of a subtype.
|
| 157 |
|
| 158 | CompoundWord < List[word_part]
|
| 159 | """
|
| 160 |
|
| 161 | def __init__(self, name, base_class):
|
| 162 | # type: (str, type_expr_t) -> None
|
| 163 | self.name = name
|
| 164 | self.base_class = base_class
|
| 165 |
|
| 166 | def Print(self, f, indent):
|
| 167 | # type: (IO[bytes], int) -> None
|
| 168 | ind = indent * ' '
|
| 169 | f.write('%sType %s {\n' % (ind, self.name))
|
| 170 | self.base_class.Print(f, indent + 1)
|
| 171 | f.write('%s}\n' % ind)
|
| 172 |
|
| 173 |
|
| 174 | class type_expr_t(_Printable):
|
| 175 | pass
|
| 176 |
|
| 177 |
|
| 178 | class NamedType(type_expr_t):
|
| 179 | """Int, string are resolved to a Primitive type 'Point' can be resolved to
|
| 180 | CompoundSum instance, etc."""
|
| 181 |
|
| 182 | def __init__(self, name):
|
| 183 | # type: (str) -> None
|
| 184 | self.name = name
|
| 185 |
|
| 186 | # Mutated by _ResolveModule / _ResolveType
|
| 187 | self.resolved = None # type: Optional[asdl_type_t]
|
| 188 |
|
| 189 | def Print(self, f, indent):
|
| 190 | # type: (IO[bytes], int) -> None
|
| 191 | f.write('NamedType %s' % (self.name)) # printed after field
|
| 192 | f.write(' (%r)' % self.resolved)
|
| 193 |
|
| 194 |
|
| 195 | class ParameterizedType(type_expr_t):
|
| 196 | """A parameterized type expression, e.g. the type of a field.
|
| 197 |
|
| 198 | Examples:
|
| 199 | List[mytype] # used to be mytype*
|
| 200 | Optional[mytype] # used to by mytype?
|
| 201 | Dict[str, int]
|
| 202 | Dict[int, List[str]]
|
| 203 | """
|
| 204 |
|
| 205 | def __init__(self, type_name, children):
|
| 206 | # type: (str, List[type_expr_t]) -> None
|
| 207 | self.type_name = type_name
|
| 208 | self.children = children
|
| 209 |
|
| 210 | def Print(self, f, indent):
|
| 211 | # type: (IO[bytes], int) -> None
|
| 212 | """Printed on one line."""
|
| 213 | f.write('%s' % (self.type_name)) # printed after field
|
| 214 | if self.children:
|
| 215 | f.write(' [ ')
|
| 216 | for i, child in enumerate(self.children):
|
| 217 | if i != 0:
|
| 218 | f.write(', ')
|
| 219 | child.Print(f, indent + 1)
|
| 220 | f.write(' ]')
|
| 221 |
|
| 222 |
|
| 223 | class Field(_Printable):
|
| 224 |
|
| 225 | def __init__(self, typ, name):
|
| 226 | # type: (type_expr_t, str) -> None
|
| 227 | self.typ = typ # type expression
|
| 228 | self.name = name # variable name
|
| 229 |
|
| 230 | def Print(self, f, indent):
|
| 231 | # type: (IO[bytes], int) -> None
|
| 232 | ind = indent * ' '
|
| 233 | f.write('%sField %r ' % (ind, self.name))
|
| 234 | self.typ.Print(f, indent)
|
| 235 | f.write('\n')
|
| 236 |
|
| 237 |
|
| 238 | class Constructor(asdl_type_t):
|
| 239 |
|
| 240 | def __init__(self, name, shared_type, fields):
|
| 241 | # type: (str, Optional[str], List[Field]) -> None
|
| 242 | self.name = name
|
| 243 | self.shared_type = shared_type # for DoubleQuoted %DoubleQuoted
|
| 244 | self.fields = fields or []
|
| 245 |
|
| 246 | def Print(self, f, indent):
|
| 247 | # type: (IO[bytes], int) -> None
|
| 248 | ind = indent * ' '
|
| 249 | f.write('%sConstructor %s' % (ind, self.name))
|
| 250 | if self.shared_type:
|
| 251 | f.write(' %%%s' % self.shared_type)
|
| 252 |
|
| 253 | if self.fields:
|
| 254 | f.write(' {\n')
|
| 255 | for field in self.fields:
|
| 256 | field.Print(f, indent + 1)
|
| 257 | f.write('%s}' % ind)
|
| 258 |
|
| 259 | f.write('\n')
|
| 260 |
|
| 261 |
|
| 262 | class Sum(_Printable):
|
| 263 |
|
| 264 | def __init__(self, types, generate=None):
|
| 265 | # type: (List[Constructor], Optional[List[str]]) -> None
|
| 266 | self.types = types
|
| 267 | self.generate = generate or [] # type: List[str]
|
| 268 |
|
| 269 | def Print(self, f, indent):
|
| 270 | # type: (IO[bytes], int) -> None
|
| 271 | ind = indent * ' '
|
| 272 | f.write('%sSum {\n' % ind)
|
| 273 | for t in self.types:
|
| 274 | t.Print(f, indent + 1)
|
| 275 | if self.generate:
|
| 276 | f.write('%s generate %s\n' % (ind, self.generate))
|
| 277 | f.write('%s}\n' % ind)
|
| 278 |
|
| 279 |
|
| 280 | class SimpleSum(Sum):
|
| 281 | pass
|
| 282 |
|
| 283 |
|
| 284 | class Product(_Printable):
|
| 285 |
|
| 286 | def __init__(self, fields):
|
| 287 | # type: (List[Field]) -> None
|
| 288 | self.fields = fields
|
| 289 |
|
| 290 | def Print(self, f, indent):
|
| 291 | # type: (IO[bytes], int) -> None
|
| 292 | ind = indent * ' '
|
| 293 | f.write('%sProduct {\n' % ind)
|
| 294 | for field in self.fields:
|
| 295 | field.Print(f, indent + 1)
|
| 296 | f.write('%s}\n' % ind)
|
| 297 |
|
| 298 |
|
| 299 | #
|
| 300 | # Helpers
|
| 301 | #
|
| 302 |
|
| 303 |
|
| 304 | def TypeNameHeuristic(asdl_name):
|
| 305 | # type: (str) -> Tuple[str, bool]
|
| 306 | """For 'use'.
|
| 307 |
|
| 308 | We don't parse the imported file, so we have a heuristic based on
|
| 309 | the name! e.g. re_t or BraceGroup
|
| 310 | """
|
| 311 | is_pointer = True
|
| 312 |
|
| 313 | if asdl_name == 'id':
|
| 314 | py_name = 'Id_t'
|
| 315 | is_pointer = False
|
| 316 |
|
| 317 | elif asdl_name == 'kind':
|
| 318 | py_name = 'Kind_t'
|
| 319 | is_pointer = False
|
| 320 |
|
| 321 | elif asdl_name[0].islower():
|
| 322 | py_name = '%s_t' % asdl_name
|
| 323 |
|
| 324 | else:
|
| 325 | py_name = asdl_name
|
| 326 |
|
| 327 | return py_name, is_pointer
|
| 328 |
|
| 329 |
|
| 330 | def NameHack(sum_name):
|
| 331 | # type: (str) -> str
|
| 332 | if sum_name == 'id':
|
| 333 | return 'Id'
|
| 334 | elif sum_name == 'kind':
|
| 335 | return 'Kind'
|
| 336 | return sum_name
|
| 337 |
|
| 338 |
|
| 339 | def MakeSimpleVariant(name):
|
| 340 | # type: (str) -> Constructor
|
| 341 | """
|
| 342 | Used by frontend/{consts,options}_gen.py
|
| 343 | """
|
| 344 | return Constructor(name, None, None)
|
| 345 |
|
| 346 |
|
| 347 | def IsOptional(t):
|
| 348 | # type: (type_expr_t) -> bool
|
| 349 | if isinstance(t, NamedType):
|
| 350 | return False
|
| 351 |
|
| 352 | elif isinstance(t, ParameterizedType):
|
| 353 | return t.type_name == 'Optional'
|
| 354 |
|
| 355 | else:
|
| 356 | raise AssertionError()
|
| 357 |
|
| 358 |
|
| 359 | def IsList(t):
|
| 360 | # type: (type_expr_t) -> bool
|
| 361 | if isinstance(t, NamedType):
|
| 362 | return False
|
| 363 |
|
| 364 | elif isinstance(t, ParameterizedType):
|
| 365 | if t.type_name == 'List':
|
| 366 | return True
|
| 367 | if t.type_name == 'Optional':
|
| 368 | return IsList(t.children[0])
|
| 369 | return False
|
| 370 |
|
| 371 | else:
|
| 372 | raise AssertionError()
|
| 373 |
|
| 374 |
|
| 375 | def IsDict(t):
|
| 376 | # type: (type_expr_t) -> bool
|
| 377 | if isinstance(t, NamedType):
|
| 378 | return False
|
| 379 |
|
| 380 | elif isinstance(t, ParameterizedType):
|
| 381 | if t.type_name == 'Dict':
|
| 382 | return True
|
| 383 | if t.type_name == 'Optional':
|
| 384 | return IsDict(t.children[0])
|
| 385 | return False
|
| 386 |
|
| 387 | else:
|
| 388 | raise AssertionError()
|