| 1 | """
|
| 2 | gen_cpp.py - Generate C++ classes from an ASDL schema.
|
| 3 |
|
| 4 | TODO:
|
| 5 |
|
| 6 | - Integrate some of the lessons here:
|
| 7 | - https://github.com/oilshell/blog-code/tree/master/asdl
|
| 8 | - And maybe mycpp/target_lang.cc
|
| 9 |
|
| 10 | - pretty printing methods
|
| 11 | - so asdl/format.py get translated?
|
| 12 |
|
| 13 | - NoOp needs to be instantiated without args?
|
| 14 | - dict becomes Dict[str, str] ?
|
| 15 | - how to handle UserType(id) ?
|
| 16 |
|
| 17 | - How do optional ASDL values like int? work? Use C++ default values?
|
| 18 | - This means that all the optionals have to be on the end. That seems OK.
|
| 19 | - I guess that's how Python does it.
|
| 20 | """
|
| 21 | from __future__ import print_function
|
| 22 |
|
| 23 | import sys
|
| 24 |
|
| 25 | from collections import defaultdict
|
| 26 |
|
| 27 | from asdl import ast
|
| 28 | from asdl import visitor
|
| 29 | from asdl.util import log
|
| 30 |
|
| 31 | from typing import Tuple, cast
|
| 32 |
|
| 33 | _ = log
|
| 34 |
|
| 35 |
|
| 36 | # Used by core/asdl_gen.py to generate _devbuild/gen/osh-types.h, with
|
| 37 | # lex_mode__*
|
| 38 | class CEnumVisitor(visitor.AsdlVisitor):
|
| 39 |
|
| 40 | def VisitSimpleSum(self, sum, name, depth):
|
| 41 | # Just use #define, since enums aren't namespaced.
|
| 42 | for i, variant in enumerate(sum.types):
|
| 43 | self.Emit('#define %s__%s %d' % (name, variant.name, i + 1), depth)
|
| 44 | self.Emit("", depth)
|
| 45 |
|
| 46 |
|
| 47 | _PRIMITIVES = {
|
| 48 | 'string': 'BigStr*', # declared in containers.h
|
| 49 | 'int': 'int',
|
| 50 | 'uint16': 'uint16_t',
|
| 51 | 'BigInt': 'mops::BigInt',
|
| 52 | 'float': 'double',
|
| 53 | 'bool': 'bool',
|
| 54 | 'any': 'void*',
|
| 55 | # TODO: frontend/syntax.asdl should properly import id enum instead of
|
| 56 | # hard-coding it here.
|
| 57 | 'id': 'Id_t',
|
| 58 | }
|
| 59 |
|
| 60 |
|
| 61 | class ForwardDeclareVisitor(visitor.AsdlVisitor):
|
| 62 | """Print forward declarations.
|
| 63 |
|
| 64 | ASDL allows forward references of types, but C++ doesn't.
|
| 65 | """
|
| 66 |
|
| 67 | def VisitCompoundSum(self, sum, name, depth):
|
| 68 | self.Emit("class %(name)s_t;" % locals(), depth)
|
| 69 |
|
| 70 | def VisitProduct(self, product, name, depth):
|
| 71 | self.Emit("class %(name)s;" % locals(), depth)
|
| 72 |
|
| 73 | def EmitFooter(self):
|
| 74 | self.Emit("", 0) # blank line
|
| 75 |
|
| 76 |
|
| 77 | def _GetCppType(typ):
|
| 78 | if isinstance(typ, ast.ParameterizedType):
|
| 79 | type_name = typ.type_name
|
| 80 |
|
| 81 | if type_name == 'Dict':
|
| 82 | k_type = _GetCppType(typ.children[0])
|
| 83 | v_type = _GetCppType(typ.children[1])
|
| 84 | return 'Dict<%s, %s>*' % (k_type, v_type)
|
| 85 |
|
| 86 | elif type_name == 'List':
|
| 87 | c_type = _GetCppType(typ.children[0])
|
| 88 | return 'List<%s>*' % (c_type)
|
| 89 |
|
| 90 | elif type_name == 'Optional':
|
| 91 | c_type = _GetCppType(typ.children[0])
|
| 92 | return c_type
|
| 93 |
|
| 94 | elif isinstance(typ, ast.NamedType):
|
| 95 |
|
| 96 | if typ.resolved:
|
| 97 | if isinstance(typ.resolved, ast.SimpleSum):
|
| 98 | return '%s_t' % typ.name
|
| 99 | if isinstance(typ.resolved, ast.Sum):
|
| 100 | return '%s_t*' % typ.name
|
| 101 | if isinstance(typ.resolved, ast.Product):
|
| 102 | return '%s*' % typ.name
|
| 103 | if isinstance(typ.resolved, ast.Use):
|
| 104 | return '%s_asdl::%s*' % (typ.resolved.module_parts[-1],
|
| 105 | ast.TypeNameHeuristic(typ.name))
|
| 106 | if isinstance(typ.resolved, ast.Extern):
|
| 107 | r = typ.resolved
|
| 108 | type_name = r.names[-1]
|
| 109 | cpp_namespace = r.names[-2]
|
| 110 | return '%s::%s*' % (cpp_namespace, type_name)
|
| 111 |
|
| 112 | # 'id' falls through here
|
| 113 | return _PRIMITIVES[typ.name]
|
| 114 |
|
| 115 | else:
|
| 116 | raise AssertionError()
|
| 117 |
|
| 118 |
|
| 119 | def _IsManagedType(typ):
|
| 120 | # This is a little cheesy, but works
|
| 121 | return _GetCppType(typ).endswith('*')
|
| 122 |
|
| 123 |
|
| 124 | def _DefaultValue(typ, conditional=True):
|
| 125 | """Values that the ::CreateNull() constructor passes."""
|
| 126 |
|
| 127 | if isinstance(typ, ast.ParameterizedType):
|
| 128 | type_name = typ.type_name
|
| 129 |
|
| 130 | if type_name == 'Dict': # TODO: can respect alloc_dicts=True
|
| 131 | return 'nullptr'
|
| 132 |
|
| 133 | elif type_name == 'List':
|
| 134 | c_type = _GetCppType(typ.children[0])
|
| 135 |
|
| 136 | d = 'Alloc<List<%s>>()' % (c_type)
|
| 137 | if conditional:
|
| 138 | return 'alloc_lists ? %s : nullptr' % d
|
| 139 | else:
|
| 140 | return d
|
| 141 |
|
| 142 | elif type_name == 'Optional':
|
| 143 | return 'nullptr'
|
| 144 |
|
| 145 | else:
|
| 146 | raise AssertionError(type_name)
|
| 147 |
|
| 148 | elif isinstance(typ, ast.NamedType):
|
| 149 | type_name = typ.name
|
| 150 |
|
| 151 | if type_name in ('int', 'uint16', 'BigInt'):
|
| 152 | default = '-1'
|
| 153 | elif type_name == 'id': # hard-coded HACK
|
| 154 | default = '-1'
|
| 155 | elif type_name == 'bool':
|
| 156 | default = 'false'
|
| 157 | elif type_name == 'float':
|
| 158 | default = '0.0' # or should it be NaN?
|
| 159 | elif type_name == 'string':
|
| 160 | default = 'kEmptyString'
|
| 161 |
|
| 162 | elif typ.resolved and isinstance(typ.resolved, ast.SimpleSum):
|
| 163 | sum_type = typ.resolved
|
| 164 | # Just make it the first variant. We could define "Undef" for
|
| 165 | # each enum, but it doesn't seem worth it.
|
| 166 | default = '%s_e::%s' % (type_name, sum_type.types[0].name)
|
| 167 |
|
| 168 | else:
|
| 169 | default = 'nullptr' # Sum or Product
|
| 170 | return default
|
| 171 |
|
| 172 | else:
|
| 173 | raise AssertionError()
|
| 174 |
|
| 175 |
|
| 176 | def _HNodeExpr(typ, var_name):
|
| 177 | # type: (ast.type_expr_t, str) -> Tuple[str, bool]
|
| 178 | none_guard = False
|
| 179 |
|
| 180 | if ast.IsOptional(typ):
|
| 181 | narrow = cast(ast.ParameterizedType, typ)
|
| 182 | typ = narrow.children[0] # descend one level
|
| 183 |
|
| 184 | if isinstance(typ, ast.ParameterizedType):
|
| 185 | code_str = '%s->PrettyTree()' % var_name
|
| 186 | none_guard = True
|
| 187 |
|
| 188 | elif isinstance(typ, ast.NamedType):
|
| 189 |
|
| 190 | type_name = typ.name
|
| 191 |
|
| 192 | if type_name in ('bool', 'int', 'uint16', 'BigInt', 'float', 'string'):
|
| 193 | code_str = "ToPretty(%s)" % var_name
|
| 194 |
|
| 195 | elif type_name == 'any':
|
| 196 | # This is used for _BuiltinFunc, _BuiltinProc. There is not that much to customize here.
|
| 197 | code_str = 'Alloc<hnode::Leaf>(StrFromC("<extern>"), color_e::External)' # % var_name
|
| 198 |
|
| 199 | elif type_name == 'id': # was meta.UserType
|
| 200 | code_str = 'Alloc<hnode::Leaf>(Id_str(%s, false), color_e::UserType)' % var_name
|
| 201 |
|
| 202 | elif typ.resolved and isinstance(typ.resolved, ast.SimpleSum):
|
| 203 | # ASDL could generate ToPretty<T> ?
|
| 204 | code_str = 'Alloc<hnode::Leaf>(%s_str(%s), color_e::TypeName)' % (
|
| 205 | type_name, var_name)
|
| 206 |
|
| 207 | else:
|
| 208 | code_str = '%s->PrettyTree(do_abbrev, seen)' % var_name
|
| 209 | none_guard = True
|
| 210 |
|
| 211 | else:
|
| 212 | raise AssertionError()
|
| 213 |
|
| 214 | return code_str, none_guard
|
| 215 |
|
| 216 |
|
| 217 | # Variant tags are NOT unique:
|
| 218 | # for each sum type, they go from 0, 1, 2 ... N
|
| 219 | # There can be up to 64
|
| 220 | # Product types tags ARE unique, because any of them can be SHARED between sum types
|
| 221 | # They start at 64
|
| 222 | MAX_VARIANTS_PER_SUM = 64
|
| 223 |
|
| 224 |
|
| 225 | class ClassDefVisitor(visitor.AsdlVisitor):
|
| 226 | """Generate C++ declarations and type-safe enums."""
|
| 227 |
|
| 228 | def __init__(self, f, pretty_print_methods=True, debug_info=None):
|
| 229 | """
|
| 230 | Args:
|
| 231 | f: file to write to
|
| 232 | debug_info: dictionary fill in with info for GDB
|
| 233 | """
|
| 234 | visitor.AsdlVisitor.__init__(self, f)
|
| 235 | self.pretty_print_methods = pretty_print_methods
|
| 236 | self.debug_info = debug_info if debug_info is not None else {}
|
| 237 |
|
| 238 | self._shared_type_tags = {}
|
| 239 | self._product_counter = MAX_VARIANTS_PER_SUM
|
| 240 |
|
| 241 | # type_id() does NOT have to fit into a GC header like type_tag, so
|
| 242 | # It's an int, not a uint8_t
|
| 243 | # Product types start at 64, so let's start sum types/variants at 256
|
| 244 | # (greater than uint8_t)
|
| 245 | self._compound_sum_counter = 256 # where variant type_id() starts
|
| 246 |
|
| 247 | self._products = []
|
| 248 | self._base_classes = defaultdict(list)
|
| 249 |
|
| 250 | self._subtypes = []
|
| 251 |
|
| 252 | def _EmitEnum(self, sum, sum_name, depth, strong=False, is_simple=False):
|
| 253 | enum = []
|
| 254 | int_to_type = {}
|
| 255 | add_suffix = not ('no_namespace_suffix' in sum.generate)
|
| 256 | for i, variant in enumerate(sum.types):
|
| 257 | if variant.shared_type: # Copied from gen_python.py
|
| 258 | tag_num = self._shared_type_tags[variant.shared_type]
|
| 259 | # e.g. DoubleQuoted may have base types expr_t, word_part_t
|
| 260 | base_class = sum_name + '_t'
|
| 261 | bases = self._base_classes[variant.shared_type]
|
| 262 | if base_class in bases:
|
| 263 | raise RuntimeError(
|
| 264 | "Two tags in sum %r refer to product type %r" %
|
| 265 | (sum_name, variant.shared_type))
|
| 266 | else:
|
| 267 | bases.append(base_class)
|
| 268 | type_str = variant.shared_type
|
| 269 | else:
|
| 270 | tag_num = i + 1
|
| 271 | type_str = '%s__%s' % (sum_name, variant.name)
|
| 272 | int_to_type[tag_num] = type_str
|
| 273 | enum.append((variant.name, tag_num)) # zero is reserved
|
| 274 |
|
| 275 | if strong:
|
| 276 | enum_name = '%s_e' % sum_name if add_suffix else sum_name
|
| 277 |
|
| 278 | # Simple sum types can be STRONG since there's no possibility of multiple
|
| 279 | # inheritance!
|
| 280 |
|
| 281 | self.Emit('enum class %s {' % enum_name, depth)
|
| 282 | for name, tag_num in enum:
|
| 283 | self.Emit('%s = %d,' % (name, tag_num), depth + 1)
|
| 284 | self.Emit('};', depth)
|
| 285 |
|
| 286 | # type alias to match Python code
|
| 287 | self.Emit('typedef %s %s_t;' % (enum_name, sum_name), depth)
|
| 288 | self.Emit('', depth)
|
| 289 |
|
| 290 | if self.pretty_print_methods:
|
| 291 | self.Emit(
|
| 292 | 'BigStr* %s_str(%s tag, bool dot = true);' %
|
| 293 | (sum_name, enum_name), depth)
|
| 294 | self.Emit('', depth)
|
| 295 |
|
| 296 | else:
|
| 297 | if is_simple:
|
| 298 | enum_name = '%s_i' % sum_name if add_suffix else sum_name
|
| 299 | else:
|
| 300 | enum_name = '%s_e' % sum_name if add_suffix else sum_name
|
| 301 |
|
| 302 | # Awkward struct/enum C++ idiom because:
|
| 303 |
|
| 304 | # 1. namespace can't be "imported" with 'using'
|
| 305 | # 2. plain enum pollutes outer namespace
|
| 306 | # 3. C++ 11 'enum class' does not allow conversion to int
|
| 307 | # 4. namespace and 'static const int' or 'static constexpr int' gives
|
| 308 | # weird link errors
|
| 309 | # https://quuxplusone.github.io/blog/2020/09/19/value-or-pitfall/
|
| 310 |
|
| 311 | self.Emit('ASDL_NAMES %s {' % enum_name, depth)
|
| 312 | self.Emit(' enum no_name {', depth)
|
| 313 | for name, tag_num in enum:
|
| 314 | self.Emit('%s = %d,' % (name, tag_num), depth + 1)
|
| 315 |
|
| 316 | if is_simple:
|
| 317 | # Help in sizing array. Note that we're 1-based.
|
| 318 | self.Emit('ARRAY_SIZE = %d,' % (len(enum) + 1), depth + 1)
|
| 319 |
|
| 320 | self.Emit(' };', depth)
|
| 321 | self.Emit('};', depth)
|
| 322 |
|
| 323 | self.Emit('', depth)
|
| 324 |
|
| 325 | if self.pretty_print_methods:
|
| 326 | self.Emit(
|
| 327 | 'BigStr* %s_str(int tag, bool dot = true);' % sum_name,
|
| 328 | depth)
|
| 329 | self.Emit('', depth)
|
| 330 |
|
| 331 | return int_to_type
|
| 332 |
|
| 333 | def VisitSimpleSum(self, sum, name, depth):
|
| 334 | # Note: there can be more than 128 variants in a simple sum, because it's an
|
| 335 | # integer and doesn't have an object header.
|
| 336 |
|
| 337 | if 'integers' in sum.generate:
|
| 338 | self._EmitEnum(sum, name, depth, strong=False, is_simple=True)
|
| 339 | self.Emit('typedef int %s_t;' % name)
|
| 340 | self.Emit('')
|
| 341 | elif 'uint16' in sum.generate:
|
| 342 | self._EmitEnum(sum, name, depth, strong=False, is_simple=True)
|
| 343 | self.Emit('typedef uint16_t %s_t;' % name)
|
| 344 | self.Emit('')
|
| 345 | else:
|
| 346 | self._EmitEnum(sum, name, depth, strong=True)
|
| 347 |
|
| 348 | def VisitCompoundSum(self, sum, sum_name, depth):
|
| 349 | #log('%d variants in %s', len(sum.types), sum_name)
|
| 350 |
|
| 351 | # Must fit in 7 bit Obj::type_tag
|
| 352 | assert len(sum.types) < MAX_VARIANTS_PER_SUM, \
|
| 353 | 'sum type %r has too many variants' % sum_name
|
| 354 |
|
| 355 | # This is a sign that Python needs string interpolation!!!
|
| 356 | def Emit(s, depth=depth):
|
| 357 | self.Emit(s % sys._getframe(1).f_locals, depth)
|
| 358 |
|
| 359 | int_to_type = self._EmitEnum(sum, sum_name, depth)
|
| 360 |
|
| 361 | # Only add debug info for compound sums.
|
| 362 | self.debug_info['%s_t' % sum_name] = int_to_type
|
| 363 |
|
| 364 | # This is the base class.
|
| 365 | Emit('class %(sum_name)s_t {')
|
| 366 |
|
| 367 | # to implement Walkable, we'd need all types to fit in in the GC header
|
| 368 | #Emit('class %(sum_name)s_t : public Walkable {')
|
| 369 |
|
| 370 | # Can't be constructed directly. Note: this shows up in uftrace in debug
|
| 371 | # mode, e.g. when we instantiate Token. Do we need it?
|
| 372 | Emit(' protected:')
|
| 373 | Emit(' %s_t() {' % sum_name)
|
| 374 | Emit(' }')
|
| 375 | Emit(' public:')
|
| 376 | Emit(' int tag() const {')
|
| 377 | # There's no inheritance relationship, so we have to reinterpret_cast.
|
| 378 | Emit(' return ObjHeader::FromObject(this)->type_tag;')
|
| 379 | Emit(' }')
|
| 380 | Emit(' constexpr int sum_type_id() {')
|
| 381 | # There's no inheritance relationship, so we have to reinterpret_cast.
|
| 382 | Emit(' return %d;' % self._compound_sum_counter)
|
| 383 | # Each sum type potentially takes up 64 integer type_id()
|
| 384 | self._compound_sum_counter += MAX_VARIANTS_PER_SUM
|
| 385 | Emit(' }')
|
| 386 |
|
| 387 | if self.pretty_print_methods:
|
| 388 | self.Emit(
|
| 389 | ' hnode_t* PrettyTree(bool do_abbrev, Dict<int, bool>* seen = nullptr);'
|
| 390 | )
|
| 391 |
|
| 392 | Emit('')
|
| 393 | Emit(' DISALLOW_COPY_AND_ASSIGN(%(sum_name)s_t)')
|
| 394 | Emit('};')
|
| 395 | Emit('')
|
| 396 |
|
| 397 | for variant in sum.types:
|
| 398 | if variant.shared_type:
|
| 399 | # Don't generate a class.
|
| 400 | pass
|
| 401 | else:
|
| 402 | super_name = '%s_t' % sum_name
|
| 403 | tag = 'static_cast<uint16_t>(%s_e::%s)' % (sum_name,
|
| 404 | variant.name)
|
| 405 | class_name = '%s__%s' % (sum_name, variant.name)
|
| 406 | self._GenClass(
|
| 407 | variant.fields,
|
| 408 | class_name,
|
| 409 | [super_name],
|
| 410 | depth,
|
| 411 | tag,
|
| 412 | # unique ID is base class ID + variant ID
|
| 413 | type_id_body='this->sum_type_id() + this->tag()')
|
| 414 |
|
| 415 | # Generate 'extern' declarations for zero arg singleton globals
|
| 416 | for variant in sum.types:
|
| 417 | if not variant.shared_type and len(variant.fields) == 0:
|
| 418 | variant_name = variant.name
|
| 419 | Emit(
|
| 420 | 'extern GcGlobal<%(sum_name)s__%(variant_name)s> g%(sum_name)s__%(variant_name)s;'
|
| 421 | )
|
| 422 |
|
| 423 | # Allow expr::Const in addition to expr.Const.
|
| 424 | Emit('ASDL_NAMES %(sum_name)s {')
|
| 425 | for variant in sum.types:
|
| 426 | if variant.shared_type:
|
| 427 | continue
|
| 428 |
|
| 429 | # TODO: This produces a lint error, but IS USED via % reflection
|
| 430 | variant_name = variant.name
|
| 431 |
|
| 432 | if len(variant.fields) == 0:
|
| 433 | Emit(
|
| 434 | ' static %(sum_name)s__%(variant_name)s* %(variant_name)s;'
|
| 435 | )
|
| 436 | else:
|
| 437 | Emit(
|
| 438 | ' typedef %(sum_name)s__%(variant_name)s %(variant_name)s;'
|
| 439 | )
|
| 440 | Emit('};')
|
| 441 | Emit('')
|
| 442 |
|
| 443 | def _GenClassBegin(self, class_name, base_classes, depth):
|
| 444 | if base_classes:
|
| 445 | bases = ', '.join('public %s' % b for b in base_classes)
|
| 446 | self.Emit("class %s : %s {" % (class_name, bases), depth)
|
| 447 | else:
|
| 448 | self.Emit("class %s {" % class_name, depth)
|
| 449 | #self.Emit("class %s : public Walkable {" % class_name, depth)
|
| 450 |
|
| 451 | self.Emit(" public:", depth)
|
| 452 |
|
| 453 | def _GenClassEnd(self, class_name, depth):
|
| 454 | self.Emit(' DISALLOW_COPY_AND_ASSIGN(%s)' % class_name)
|
| 455 | self.Emit('};', depth)
|
| 456 | self.Emit('', depth)
|
| 457 |
|
| 458 | def _EmitMethodsInHeader(self, obj_header_str, type_id_body=None):
|
| 459 | """Generate PrettyTree(), type_id(), obj_header()"""
|
| 460 | if self.pretty_print_methods:
|
| 461 | self.Emit(
|
| 462 | 'hnode_t* PrettyTree(bool do_abbrev, Dict<int, bool>* seen = nullptr);'
|
| 463 | )
|
| 464 | self.Emit('')
|
| 465 |
|
| 466 | if type_id_body:
|
| 467 | # Unique integer per type, for graph traversal
|
| 468 | self.Emit('int type_id() {')
|
| 469 | self.Emit(' return %s;' % type_id_body)
|
| 470 | self.Emit('}')
|
| 471 | self.Emit('')
|
| 472 |
|
| 473 | self.Emit('static constexpr ObjHeader obj_header() {')
|
| 474 | self.Emit(' return %s;' % obj_header_str)
|
| 475 | self.Emit('}')
|
| 476 |
|
| 477 | def _GenClassForList(self, class_name, base_classes, tag_num):
|
| 478 | depth = 0
|
| 479 | self._GenClassBegin(class_name, base_classes, depth)
|
| 480 |
|
| 481 | base_type_str = [b for b in base_classes if b.startswith('List<')][0]
|
| 482 |
|
| 483 | # Zero arg constructor
|
| 484 | self.Emit(' %s() : %s() {' % (class_name, base_type_str), depth)
|
| 485 | self.Emit(' }', depth)
|
| 486 |
|
| 487 | # One arg constructor used by Take.
|
| 488 | # This should be is PROTECTED, like the superclass, but Alloc<T> calls
|
| 489 | # it. Hm.
|
| 490 | #self.Emit(' protected:')
|
| 491 | self.Emit(
|
| 492 | ' %s(%s* plain_list) : %s(plain_list) {' %
|
| 493 | (class_name, base_type_str, base_type_str), depth)
|
| 494 | self.Emit(' }', depth)
|
| 495 |
|
| 496 | self.Emit(' static %s* New() {' % class_name, depth)
|
| 497 | self.Emit(' return Alloc<%s>();' % class_name, depth)
|
| 498 | self.Emit(' }', depth)
|
| 499 |
|
| 500 | # Take() constructor
|
| 501 | self.Emit(
|
| 502 | ' static %s* Take(%s* plain_list) {' %
|
| 503 | (class_name, base_type_str), depth)
|
| 504 | self.Emit(' auto* result = Alloc<%s>(plain_list);' % class_name,
|
| 505 | depth)
|
| 506 | self.Emit(' plain_list->SetTaken();', depth)
|
| 507 | self.Emit(' return result;', depth)
|
| 508 | self.Emit(' }', depth)
|
| 509 |
|
| 510 | # field_mask() should call List superclass, since say word_t won't have it
|
| 511 | obj_header_str = 'ObjHeader::TaggedSubtype(%d, field_mask())' % tag_num
|
| 512 | self.Indent()
|
| 513 | self._EmitMethodsInHeader(obj_header_str)
|
| 514 | self.Dedent()
|
| 515 |
|
| 516 | self._GenClassEnd(class_name, depth)
|
| 517 |
|
| 518 | def _GenClass(self,
|
| 519 | fields,
|
| 520 | class_name,
|
| 521 | base_classes,
|
| 522 | depth,
|
| 523 | tag_num,
|
| 524 | obj_header_str='',
|
| 525 | type_id_body=None):
|
| 526 | """For Product and Constructor."""
|
| 527 | self._GenClassBegin(class_name, base_classes, depth)
|
| 528 |
|
| 529 | # Ensure that the member variables are ordered such that GC managed objects
|
| 530 | # come before any unmanaged ones because we use `HeapTag::Scanned`.
|
| 531 | managed_fields = []
|
| 532 | unmanaged_fields = []
|
| 533 | for f in fields:
|
| 534 | if _IsManagedType(f.typ):
|
| 535 | managed_fields.append(f)
|
| 536 | else:
|
| 537 | unmanaged_fields.append(f)
|
| 538 | all_fields = managed_fields + unmanaged_fields
|
| 539 |
|
| 540 | def FieldInitJoin(strs):
|
| 541 | # reflow doesn't work well here, so do it manually
|
| 542 | return ',\n '.join(strs)
|
| 543 |
|
| 544 | # Ensure that the constructor params are listed in the same order as the
|
| 545 | # equivalent python constructors for compatibility in translated code.
|
| 546 | params = []
|
| 547 | for f in fields:
|
| 548 | params.append('%s %s' % (_GetCppType(f.typ), f.name))
|
| 549 |
|
| 550 | # Member initializers are in the same order as the member variables to
|
| 551 | # avoid compiler warnings (the order doesn't affect the semantics).
|
| 552 | inits = []
|
| 553 | for f in all_fields:
|
| 554 | inits.append('%s(%s)' % (f.name, f.name))
|
| 555 |
|
| 556 | # Define constructor with N args
|
| 557 | if len(inits):
|
| 558 | self.Emit(' %s(%s)' % (class_name, ', '.join(params)), depth)
|
| 559 | self.Emit(' : %s {' % FieldInitJoin(inits),
|
| 560 | depth,
|
| 561 | reflow=False)
|
| 562 | self.Emit(' }')
|
| 563 | else:
|
| 564 | self.Emit(' %s(%s) {}' % (class_name, ', '.join(params)), depth)
|
| 565 | self.Emit('')
|
| 566 |
|
| 567 | # Define static constructor with ZERO args. Don't emit for types with no
|
| 568 | # fields.
|
| 569 | if fields:
|
| 570 | init_args = []
|
| 571 | for field in fields:
|
| 572 | init_args.append(_DefaultValue(field.typ))
|
| 573 |
|
| 574 | self.Emit(
|
| 575 | ' static %s* CreateNull(bool alloc_lists = false) { ' %
|
| 576 | class_name, depth)
|
| 577 | self.Emit(
|
| 578 | ' return Alloc<%s>(%s);' %
|
| 579 | (class_name, ', '.join(init_args)), depth)
|
| 580 | self.Emit(' }')
|
| 581 | self.Emit('')
|
| 582 |
|
| 583 | obj_header_str = 'ObjHeader::AsdlClass(%s, %d)' % (tag_num,
|
| 584 | len(managed_fields))
|
| 585 | self.Indent()
|
| 586 | self._EmitMethodsInHeader(obj_header_str, type_id_body=type_id_body)
|
| 587 | self.Dedent()
|
| 588 |
|
| 589 | #
|
| 590 | # Members
|
| 591 | #
|
| 592 | for field in all_fields:
|
| 593 | self.Emit(" %s %s;" % (_GetCppType(field.typ), field.name))
|
| 594 | self.Emit('')
|
| 595 |
|
| 596 | self._GenClassEnd(class_name, depth)
|
| 597 |
|
| 598 | def VisitSubType(self, subtype):
|
| 599 | self._shared_type_tags[subtype.name] = self._product_counter
|
| 600 |
|
| 601 | # Also create these last. They may inherit from sum types that have yet
|
| 602 | # to be defined.
|
| 603 | self._subtypes.append((subtype, self._product_counter))
|
| 604 | self._product_counter += 1
|
| 605 |
|
| 606 | def VisitProduct(self, product, name, depth):
|
| 607 | self._shared_type_tags[name] = self._product_counter
|
| 608 | # Create a tuple of _GenClass args to create LAST. They may inherit from
|
| 609 | # sum types that have yet to be defined.
|
| 610 | self._products.append((product, name, depth, self._product_counter))
|
| 611 | self._product_counter += 1
|
| 612 |
|
| 613 | def EmitFooter(self):
|
| 614 | # Now generate all the product types we deferred.
|
| 615 | for args in self._products:
|
| 616 | ast_node, name, depth, tag_num = args
|
| 617 | # Figure out base classes AFTERWARD.
|
| 618 | bases = self._base_classes[name]
|
| 619 | self._GenClass(
|
| 620 | ast_node.fields,
|
| 621 | name,
|
| 622 | bases,
|
| 623 | depth,
|
| 624 | tag_num,
|
| 625 | # product types: this expression is the same as this->tag() for variants
|
| 626 | # but we don't use that anywhere else in the code
|
| 627 | type_id_body='ObjHeader::FromObject(this)->type_tag')
|
| 628 |
|
| 629 | for args in self._subtypes:
|
| 630 | subtype, tag_num = args
|
| 631 | # Figure out base classes AFTERWARD.
|
| 632 | bases = self._base_classes[subtype.name]
|
| 633 |
|
| 634 | cpp_type = _GetCppType(subtype.base_class)
|
| 635 | assert cpp_type.endswith('*') # hack
|
| 636 | cpp_type = cpp_type[:-1]
|
| 637 | bases.append(cpp_type)
|
| 638 |
|
| 639 | t = subtype.base_class.type_name
|
| 640 | if t == 'List':
|
| 641 | self._GenClassForList(subtype.name, bases, tag_num)
|
| 642 |
|
| 643 | elif t == 'Dict':
|
| 644 | raise AssertionError()
|
| 645 | else:
|
| 646 | #obj_header_str = ''
|
| 647 | raise AssertionError()
|
| 648 |
|
| 649 |
|
| 650 | class MethodDefVisitor(visitor.AsdlVisitor):
|
| 651 | """Generate the body of pretty printing methods.
|
| 652 |
|
| 653 | We have to do this in another pass because types and schemas have
|
| 654 | circular dependencies.
|
| 655 | """
|
| 656 |
|
| 657 | def __init__(self, f, abbrev_ns=None, abbrev_mod_entries=None):
|
| 658 | visitor.AsdlVisitor.__init__(self, f)
|
| 659 | self.abbrev_ns = abbrev_ns
|
| 660 | self.abbrev_mod_entries = abbrev_mod_entries or []
|
| 661 |
|
| 662 | def _EmitList(self, list_str, item_type, out_val_name):
|
| 663 | # used in format strings
|
| 664 | c_item_type = _GetCppType(item_type)
|
| 665 |
|
| 666 | def _Emit(s):
|
| 667 | self.Emit(s % sys._getframe(1).f_locals, self.current_depth)
|
| 668 |
|
| 669 | _Emit(
|
| 670 | 'hnode::Array* %(out_val_name)s = Alloc<hnode::Array>(Alloc<List<hnode_t*>>());'
|
| 671 | )
|
| 672 | _Emit(
|
| 673 | 'for (ListIter<%(c_item_type)s> it(%(list_str)s); !it.Done(); it.Next()) {'
|
| 674 | )
|
| 675 | _Emit(' %(c_item_type)s v_ = it.Value();')
|
| 676 |
|
| 677 | child_code_str, none_guard = _HNodeExpr(item_type, 'v_')
|
| 678 | if none_guard: # e.g. for List[Optional[value_t]]
|
| 679 | # TODO: could consolidate this logic with asdl/runtime.py NewLeaf(), which is prebuilt/
|
| 680 | child_code_str = (
|
| 681 | '(v_ == nullptr) ? Alloc<hnode::Leaf>(StrFromC("_"), color_e::OtherConst) : %s'
|
| 682 | % child_code_str)
|
| 683 | _Emit(' hnode_t* h = %(child_code_str)s;')
|
| 684 | _Emit(' %(out_val_name)s->children->append(h);')
|
| 685 | _Emit('}')
|
| 686 |
|
| 687 | def _EmitListPrettyPrint(self, field, out_val_name):
|
| 688 | typ = field.typ
|
| 689 | if typ.type_name == 'Optional': # descend one level
|
| 690 | typ = typ.children[0]
|
| 691 | item_type = typ.children[0]
|
| 692 |
|
| 693 | self._EmitList('this->%s' % field.name, item_type, out_val_name)
|
| 694 |
|
| 695 | def _EmitDictPrettyPrint(self, field):
|
| 696 | typ = field.typ
|
| 697 | if typ.type_name == 'Optional': # descend one level
|
| 698 | typ = typ.children[0]
|
| 699 |
|
| 700 | k_typ = typ.children[0]
|
| 701 | v_typ = typ.children[1]
|
| 702 |
|
| 703 | k_c_type = _GetCppType(k_typ)
|
| 704 | v_c_type = _GetCppType(v_typ)
|
| 705 |
|
| 706 | k_code_str, _ = _HNodeExpr(k_typ, 'k')
|
| 707 | v_code_str, _ = _HNodeExpr(v_typ, 'v')
|
| 708 |
|
| 709 | self.Emit('auto* unnamed = NewList<hnode_t*>();')
|
| 710 | self.Emit(
|
| 711 | 'auto* hdict = Alloc<hnode::Record>(kEmptyString, StrFromC("{"), StrFromC("}"), NewList<Field*>(), unnamed);'
|
| 712 | )
|
| 713 | self.Emit(
|
| 714 | 'for (DictIter<%s, %s> it(this->%s); !it.Done(); it.Next()) {' %
|
| 715 | (k_c_type, v_c_type, field.name))
|
| 716 | self.Emit(' auto k = it.Key();')
|
| 717 | self.Emit(' auto v = it.Value();')
|
| 718 | self.Emit(' unnamed->append(%s);' % k_code_str)
|
| 719 | self.Emit(' unnamed->append(%s);' % v_code_str)
|
| 720 | self.Emit('}')
|
| 721 | self.Emit('L->append(Alloc<Field>(StrFromC("%s"), hdict));' %
|
| 722 | field.name)
|
| 723 |
|
| 724 | def _EmitCodeForField(self, field, counter):
|
| 725 | """Generate code that returns an hnode for a field."""
|
| 726 | out_val_name = 'x%d' % counter
|
| 727 |
|
| 728 | if ast.IsList(field.typ):
|
| 729 | self.Emit('if (this->%s != nullptr) { // List' % field.name)
|
| 730 | self.Indent()
|
| 731 | self._EmitListPrettyPrint(field, out_val_name)
|
| 732 | self.Emit('L->append(Alloc<Field>(StrFromC("%s"), %s));' %
|
| 733 | (field.name, out_val_name))
|
| 734 | self.Dedent()
|
| 735 | self.Emit('}')
|
| 736 |
|
| 737 | elif ast.IsDict(field.typ):
|
| 738 | self.Emit('if (this->%s != nullptr) { // Dict' % field.name)
|
| 739 | self.Indent()
|
| 740 | self._EmitDictPrettyPrint(field)
|
| 741 | self.Dedent()
|
| 742 | self.Emit('}')
|
| 743 |
|
| 744 | elif ast.IsOptional(field.typ):
|
| 745 | typ = field.typ.children[0]
|
| 746 |
|
| 747 | self.Emit('if (this->%s) { // Optional' % field.name)
|
| 748 | child_code_str, _ = _HNodeExpr(typ, 'this->%s' % field.name)
|
| 749 | self.Emit(' hnode_t* %s = %s;' % (out_val_name, child_code_str))
|
| 750 | self.Emit(' L->append(Alloc<Field>(StrFromC("%s"), %s));' %
|
| 751 | (field.name, out_val_name))
|
| 752 | self.Emit('}')
|
| 753 |
|
| 754 | else:
|
| 755 | var_name = 'this->%s' % field.name
|
| 756 | code_str, obj_none_guard = _HNodeExpr(field.typ, var_name)
|
| 757 |
|
| 758 | depth = self.current_depth
|
| 759 | if obj_none_guard: # to satisfy MyPy type system
|
| 760 | pass
|
| 761 | self.Emit('hnode_t* %s = %s;' % (out_val_name, code_str), depth)
|
| 762 |
|
| 763 | self.Emit(
|
| 764 | 'L->append(Alloc<Field>(StrFromC("%s"), %s));' %
|
| 765 | (field.name, out_val_name), depth)
|
| 766 |
|
| 767 | def _EmitPrettyPrintMethods(self,
|
| 768 | class_name,
|
| 769 | all_fields,
|
| 770 | sum_name=None,
|
| 771 | list_item_type=None):
|
| 772 | """
|
| 773 | """
|
| 774 | self.Emit('')
|
| 775 | self.Emit(
|
| 776 | 'hnode_t* %s::PrettyTree(bool do_abbrev, Dict<int, bool>* seen) {'
|
| 777 | % class_name)
|
| 778 |
|
| 779 | # Similar to j8::HeapValueId()
|
| 780 | self.Emit(' seen = seen ? seen : Alloc<Dict<int, bool>>();')
|
| 781 | self.Emit(' int heap_id = ObjectId(this);')
|
| 782 | self.Emit(' if (dict_contains(seen, heap_id)) {')
|
| 783 | self.Emit(' return Alloc<hnode::AlreadySeen>(heap_id);')
|
| 784 | self.Emit(' }')
|
| 785 | self.Emit(' seen->set(heap_id, true);')
|
| 786 | self.Emit('')
|
| 787 |
|
| 788 | if list_item_type:
|
| 789 | self.Indent()
|
| 790 | self._EmitList('this', list_item_type, 'out_node')
|
| 791 | self.Dedent()
|
| 792 | else:
|
| 793 | if sum_name is not None:
|
| 794 | n = '%s_str(this->tag())' % sum_name
|
| 795 | else:
|
| 796 | n = 'StrFromC("%s")' % class_name
|
| 797 |
|
| 798 | abbrev_name = '_%s' % class_name
|
| 799 |
|
| 800 | if abbrev_name in self.abbrev_mod_entries:
|
| 801 | self.Emit(' if (do_abbrev) {')
|
| 802 | self.Emit(' auto* p = %s::%s(this);' %
|
| 803 | (self.abbrev_ns, abbrev_name))
|
| 804 | self.Emit(' if (p) {')
|
| 805 | self.Emit(' return p;')
|
| 806 | self.Emit(' }')
|
| 807 | self.Emit(' }')
|
| 808 | else:
|
| 809 | #self.Emit(' // no abbrev %s' % abbrev_name)
|
| 810 | pass
|
| 811 |
|
| 812 | self.Emit(' hnode::Record* out_node = runtime::NewRecord(%s);' %
|
| 813 | n)
|
| 814 | if all_fields:
|
| 815 | self.Emit(' List<Field*>* L = out_node->fields;')
|
| 816 | self.Emit('')
|
| 817 |
|
| 818 | # Use the runtime type to be more like asdl/format.py
|
| 819 | for local_id, field in enumerate(all_fields):
|
| 820 | #log('%s :: %s', field_name, field_desc)
|
| 821 | self.Indent()
|
| 822 | self._EmitCodeForField(field, local_id)
|
| 823 | self.Dedent()
|
| 824 | self.Emit('')
|
| 825 | self.Emit(' return out_node;')
|
| 826 | self.Emit('}')
|
| 827 | self.Emit('')
|
| 828 |
|
| 829 | def _EmitStrFunction(self,
|
| 830 | sum,
|
| 831 | sum_name,
|
| 832 | depth,
|
| 833 | strong=False,
|
| 834 | simple=False):
|
| 835 | add_suffix = not ('no_namespace_suffix' in sum.generate)
|
| 836 | if add_suffix:
|
| 837 | if simple:
|
| 838 | enum_name = '%s_i' % sum_name
|
| 839 | else:
|
| 840 | enum_name = '%s_e' % sum_name
|
| 841 | else:
|
| 842 | enum_name = sum_name
|
| 843 |
|
| 844 | if strong:
|
| 845 | self.Emit(
|
| 846 | 'BigStr* %s_str(%s tag, bool dot) {' % (sum_name, enum_name),
|
| 847 | depth)
|
| 848 | else:
|
| 849 | self.Emit('BigStr* %s_str(int tag, bool dot) {' % sum_name, depth)
|
| 850 |
|
| 851 | buf_size = 32
|
| 852 | v_max = max(len(variant.name) for variant in sum.types)
|
| 853 | s_max = v_max + 1 + len(sum_name) + 1 # for . and NUL
|
| 854 | if s_max > buf_size:
|
| 855 | raise RuntimeError('Sum name %r + variant name is too long' %
|
| 856 | sum_name)
|
| 857 |
|
| 858 | self.Emit(' char buf[%d];' % buf_size, depth)
|
| 859 | self.Emit(' const char* v = nullptr;', depth)
|
| 860 | self.Emit(' switch (tag) {', depth)
|
| 861 | for variant in sum.types:
|
| 862 | self.Emit('case %s::%s:' % (enum_name, variant.name), depth + 1)
|
| 863 | self.Emit(' v = "%s"; break;' % variant.name, depth + 1)
|
| 864 |
|
| 865 | self.Emit('default:', depth + 1)
|
| 866 | self.Emit(' assert(0);', depth + 1)
|
| 867 |
|
| 868 | self.Emit(' }', depth)
|
| 869 | self.Emit(' if (dot) {', depth)
|
| 870 | self.Emit(' snprintf(buf, %d, "%s.%%s", v);' % (buf_size, sum_name),
|
| 871 | depth)
|
| 872 | self.Emit(' return StrFromC(buf);', depth)
|
| 873 | self.Emit(' } else {', depth)
|
| 874 | self.Emit(' return StrFromC(v);', depth)
|
| 875 | self.Emit(' }', depth)
|
| 876 | self.Emit('}', depth)
|
| 877 |
|
| 878 | def VisitSimpleSum(self, sum, name, depth):
|
| 879 | if 'integers' in sum.generate or 'uint16' in sum.generate:
|
| 880 | self._EmitStrFunction(sum, name, depth, strong=False, simple=True)
|
| 881 | else:
|
| 882 | self._EmitStrFunction(sum, name, depth, strong=True)
|
| 883 |
|
| 884 | def VisitCompoundSum(self, sum, sum_name, depth):
|
| 885 | self._EmitStrFunction(sum, sum_name, depth)
|
| 886 |
|
| 887 | # Generate definitions for the for zero arg singleton globals
|
| 888 | for variant in sum.types:
|
| 889 | if variant.shared_type:
|
| 890 | continue
|
| 891 | if len(variant.fields) == 0:
|
| 892 | variant_name = variant.name
|
| 893 | self.Emit('')
|
| 894 | self.Emit('%s__%s* %s::%s = &g%s__%s.obj;' %
|
| 895 | (sum_name, variant_name, sum_name, variant_name,
|
| 896 | sum_name, variant_name))
|
| 897 | self.Emit('')
|
| 898 | self.Emit('GcGlobal<%s__%s> g%s__%s = ' %
|
| 899 | (sum_name, variant_name, sum_name, variant_name))
|
| 900 | self.Emit(' { ObjHeader::Global(%s_e::%s) };' %
|
| 901 | (sum_name, variant_name))
|
| 902 |
|
| 903 | for variant in sum.types:
|
| 904 | if variant.shared_type:
|
| 905 | continue
|
| 906 | all_fields = variant.fields
|
| 907 | class_name = '%s__%s' % (sum_name, variant.name)
|
| 908 | self._EmitPrettyPrintMethods(class_name,
|
| 909 | all_fields,
|
| 910 | sum_name=sum_name)
|
| 911 |
|
| 912 | # Emit dispatch WITHOUT using 'virtual'
|
| 913 | self.Emit('')
|
| 914 | self.Emit(
|
| 915 | 'hnode_t* %s_t::PrettyTree(bool do_abbrev, Dict<int, bool>* seen) {'
|
| 916 | % sum_name)
|
| 917 | self.Emit(' switch (this->tag()) {', depth)
|
| 918 |
|
| 919 | for variant in sum.types:
|
| 920 | if variant.shared_type:
|
| 921 | subtype_name = variant.shared_type
|
| 922 | else:
|
| 923 | subtype_name = '%s__%s' % (sum_name, variant.name)
|
| 924 |
|
| 925 | self.Emit(' case %s_e::%s: {' % (sum_name, variant.name), depth)
|
| 926 | self.Emit(
|
| 927 | ' %s* obj = static_cast<%s*>(this);' %
|
| 928 | (subtype_name, subtype_name), depth)
|
| 929 | self.Emit(' return obj->PrettyTree(do_abbrev, seen);', depth)
|
| 930 | self.Emit(' }', depth)
|
| 931 |
|
| 932 | self.Emit(' default:', depth)
|
| 933 | self.Emit(' assert(0);', depth)
|
| 934 |
|
| 935 | self.Emit(' }')
|
| 936 | self.Emit('}')
|
| 937 |
|
| 938 | def VisitProduct(self, product, name, depth):
|
| 939 | self._EmitPrettyPrintMethods(name, product.fields)
|
| 940 |
|
| 941 | def VisitSubType(self, subtype):
|
| 942 | list_item_type = None
|
| 943 | b = subtype.base_class
|
| 944 | if isinstance(b, ast.ParameterizedType):
|
| 945 | if b.type_name == 'List':
|
| 946 | list_item_type = b.children[0]
|
| 947 | self._EmitPrettyPrintMethods(subtype.name, [],
|
| 948 | list_item_type=list_item_type)
|