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| 1 | namespace IR is | |
| 2 | use System.NotImplementedException | |
| 3 | use IO.File | |
| 4 | ||
| 5 | use Values.Call | |
| 6 | ||
| 7 | class CONTEXT is | |
| 8 | _logger: Logging.Logger | |
| 9 | ||
| 10 | entry_point_name: string public | |
| 11 | ||
| 12 | // Whether `--entry` named it. A build that asks for an entry point | |
| 13 | // by name does not want a file's top-level statements instead, so | |
| 14 | // the synthesised entry stops being a candidate when this is set. | |
| 15 | entry_point_name_is_explicit: bool public | |
| 16 | seen_entrypoint: bool public | |
| 17 | ||
| 18 | // Binary emission state, carried here so that a value's `gen` | |
| 19 | // can reach the method body it is being emitted into without | |
| 20 | // every caller threading it through. | |
| 21 | // | |
| 22 | // The assembly emitter is installed by the driver before any | |
| 23 | // pass that emits runs, and every emitting pass requires one, so | |
| 24 | // it reads as non-optional: a build that reaches emission | |
| 25 | // without one is a wiring error rather than a state to branch | |
| 26 | // on, and fails here rather than silently emitting nothing. | |
| 27 | // | |
| 28 | // The body emitter is genuinely optional - it tracks the method | |
| 29 | // the IL visitor currently has open, and is null outside one. | |
| 30 | _srm_assembly_emitter: Emitter.SRM_ASSEMBLY_EMITTER? | |
| 31 | ||
| 32 | // What the emitter was installed as, so a rebuild can make | |
| 33 | // another one like it. Analysis compiles the project again on | |
| 34 | // every edit and query miss, and an emitter accumulates a | |
| 35 | // reference and specification cache per compile: kept across | |
| 36 | // rebuilds it grows for as long as the editor session lasts. | |
| 37 | _srm_module_name: string? | |
| 38 | _srm_module_version: string? | |
| 39 | _srm_want_library: bool | |
| 40 | ||
| 41 | srm_assembly_emitter: Emitter.SRM_ASSEMBLY_EMITTER => | |
| 42 | _srm_assembly_emitter! | |
| 43 | ||
| 44 | install_srm_assembly_emitter( | |
| 45 | module_name: string, | |
| 46 | module_version: string, | |
| 47 | want_library: bool | |
| 48 | ) is | |
| 49 | _srm_module_name = module_name | |
| 50 | _srm_module_version = module_version | |
| 51 | _srm_want_library = want_library | |
| 52 | ||
| 53 | reset_srm_assembly_emitter() | |
| 54 | si | |
| 55 | ||
| 56 | // Called wherever the symbol table is abandoned: the handles the | |
| 57 | // old emitter holds name symbols that no longer exist. | |
| 58 | reset_srm_assembly_emitter() is | |
| 59 | if let module_name = _srm_module_name then | |
| 60 | _srm_assembly_emitter = | |
| 61 | Emitter.SRM_ASSEMBLY_EMITTER( | |
| 62 | "{module_name}.{if _srm_want_library then "dll" else "exe" fi}", | |
| 63 | module_name, | |
| 64 | _srm_module_version!, | |
| 65 | _srm_want_library) | |
| 66 | fi | |
| 67 | si | |
| 68 | ||
| 69 | current_srm_body_emitter: Emitter.SRM_METHOD_BODY_EMITTER? public | |
| 70 | ||
| 71 | // Reads `--debug` off the shared build-flags singleton so | |
| 72 | // non-debug builds pay nothing for the `mark_location` check. | |
| 73 | want_debug_info: bool => | |
| 74 | IoC.CONTAINER.instance.build_flags.want_debug | |
| 75 | ||
| 76 | // One step of an interactive session, where a later step is | |
| 77 | // another assembly and may add an alternative to a hierarchy an | |
| 78 | // earlier step compiled against. An ordinary build knows every | |
| 79 | // alternative and pays for none of the guards that costs. | |
| 80 | is_submission: bool => | |
| 81 | IoC.CONTAINER.instance.build_flags.submission_name? | |
| 82 | ||
| 83 | // Compilation-global counter assigning each `@IL.output` region a | |
| 84 | // sequence number, so the runner can rebuild source order across | |
| 85 | // methods. Bumped once per region, at its start. | |
| 86 | _il_output_sequence: int | |
| 87 | ||
| 88 | init( | |
| 89 | logger: Logging.Logger, | |
| 90 | entry_point_name: string | |
| 91 | ) is | |
| 92 | _logger = logger | |
| 93 | self.entry_point_name = entry_point_name | |
| 94 | si | |
| 95 | ||
| 96 | // Note a source-language position at the current emission | |
| 97 | // point. A position is recorded against the instruction offset | |
| 98 | // the body has reached, so this is only meaningful while one is | |
| 99 | // open; `mark_sequence_point` itself dedupes a repeated position | |
| 100 | // at the same offset. Internal / sentinel locations are ignored. | |
| 101 | mark_location(location: Source.LOCATION?) is | |
| 102 | if !want_debug_info \/ !location? \/ location.is_internal \/ !current_srm_body_emitter? then | |
| 103 | return | |
| 104 | fi | |
| 105 | ||
| 106 | current_srm_body_emitter.mark_sequence_point(location) | |
| 107 | si | |
| 108 | ||
| 109 | // Marks an emission path that isn't implemented yet, so a build | |
| 110 | // can continue past a gap in the binary back end rather than | |
| 111 | // crashing. Traced to stderr; nothing reads what a gap produces. | |
| 112 | fixme(value: object) is | |
| 113 | Logging.debug_always("FIXME: {value}") | |
| 114 | si | |
| 115 | ||
| 116 | next_il_output_sequence() -> int is | |
| 117 | _il_output_sequence = _il_output_sequence + 1 | |
| 118 | ||
| 119 | return _il_output_sequence | |
| 120 | si | |
| 121 | ||
| 122 | // Resolves a call target to a member reference. Handles the two | |
| 123 | // owner shapes a call can have: a ghūl global function, hosted on | |
| 124 | // its namespace's $globals carrier, and a static method, hosted | |
| 125 | // directly on its declaring type. | |
| 126 | // | |
| 127 | // Only void-returning signatures taking zero or one string | |
| 128 | // argument are encoded; anything else needs the signature blob | |
| 129 | // built from the function's actual argument and return types. | |
| 130 | // The CLR parameter index of a named argument. | |
| 131 | // | |
| 132 | // Arguments are addressed by name up to here, and metadata has | |
| 133 | // only positions. An instance method's slot 0 is the receiver, | |
| 134 | // so a declared argument sits one further along. | |
| 135 | resolve_argument_index(symbol: Semantic.Symbols.Symbol) -> int is | |
| 136 | let function = cast Semantic.Symbols.Function?(symbol.owner) | |
| 137 | ||
| 138 | assert function? else | |
| 139 | "argument '{symbol.name}' is not owned by a function" | |
| 140 | ||
| 141 | let names = function.argument_names | |
| 142 | ||
| 143 | for i in 0..names.count do | |
| 144 | if names[i] =~ symbol.name then | |
| 145 | return if function.is_emitted_with_receiver then i + 1 else i fi | |
| 146 | fi | |
| 147 | od | |
| 148 | ||
| 149 | assert false else | |
| 150 | "argument '{symbol.name}' is not declared by {function.name}" | |
| 151 | ||
| 152 | return 0 | |
| 153 | si | |
| 154 | ||
| 155 | // The metadata token naming a type, for instructions that take | |
| 156 | // one directly (box, castclass, isinst). A constructed generic | |
| 157 | // needs a TypeSpec rather than a bare reference, which is not | |
| 158 | // built yet, so those report rather than emitting a token that | |
| 159 | // names the open definition. | |
| 160 | // A unit variant is constructed by loading the one interned | |
| 161 | // instance the back end synthesises for it, rather than by | |
| 162 | // calling its constructor. | |
| 163 | resolve_unit_variant_instance( | |
| 164 | variant: Semantic.Scope | |
| 165 | ) -> System.Reflection.Metadata.EntityHandle is | |
| 166 | let emitter = srm_assembly_emitter | |
| 167 | ||
| 168 | // A specialization holds the open definition rather than | |
| 169 | // being one, and only the definition has a row. | |
| 170 | let classy = | |
| 171 | if let generic: Semantic.Symbols.GENERIC = variant then | |
| 172 | cast Semantic.Symbols.Classy?(generic.symbol) | |
| 173 | else | |
| 174 | cast Semantic.Symbols.Classy?(variant) | |
| 175 | fi | |
| 176 | ||
| 177 | assert classy? else "unit variant '{variant.name}' is not a type" | |
| 178 | ||
| 179 | // A generic variant's instance field belongs to the | |
| 180 | // instantiation, so it is reached through a reference whose | |
| 181 | // parent is that instantiation's specification. The field's | |
| 182 | // own type is written open — the variant applied to its own | |
| 183 | // parameters — because the reference names the field on the | |
| 184 | // open definition and the instantiation lives in the parent. | |
| 185 | if classy.is_generic then | |
| 186 | if let constructed: Semantic.Symbols.GENERIC = variant then | |
| 187 | return cast System.Reflection.Metadata.EntityHandle( | |
| 188 | emitter.add_named_member_reference( | |
| 189 | resolve_type_token(constructed.type), | |
| 190 | "_instance", | |
| 191 | "_instance {constructed.type}", | |
| 192 | Emitter.SRM_SIGNATURE_ENCODER(emitter) | |
| 193 | .field_signature(classy.own_instantiation))) | |
| 194 | fi | |
| 195 | ||
| 196 | // Reached from inside the variant's own static | |
| 197 | // initializer, where there is no instantiation to hand: | |
| 198 | // the parent is the variant applied to its own | |
| 199 | // parameters, which is what the field's row names too. | |
| 200 | return cast System.Reflection.Metadata.EntityHandle( | |
| 201 | emitter.add_named_member_reference( | |
| 202 | resolve_type_token(classy.own_instantiation), | |
| 203 | "_instance", | |
| 204 | "_instance {classy.own_instantiation}", | |
| 205 | Emitter.SRM_SIGNATURE_ENCODER(emitter) | |
| 206 | .field_signature(classy.own_instantiation))) | |
| 207 | fi | |
| 208 | ||
| 209 | let instance = emitter.handles.unit_variant_instance(classy) | |
| 210 | ||
| 211 | if instance? then | |
| 212 | return cast System.Reflection.Metadata.EntityHandle(instance) | |
| 213 | fi | |
| 214 | ||
| 215 | // A variant of a union another assembly declares. Its | |
| 216 | // interned instance is a field over there, so it is reached | |
| 217 | // by reference rather than by the row this assembly would | |
| 218 | // have written for one of its own. | |
| 219 | assert classy.is_reflected else | |
| 220 | "unit variant '{variant.name}' has no interned instance" | |
| 221 | ||
| 222 | return cast System.Reflection.Metadata.EntityHandle( | |
| 223 | emitter.add_named_member_reference( | |
| 224 | resolve_type_token(classy.type!), | |
| 225 | "_instance", | |
| 226 | "_instance {classy.type}", | |
| 227 | Emitter.SRM_SIGNATURE_ENCODER(emitter).field_signature(classy.type!))) | |
| 228 | si | |
| 229 | ||
| 230 | // A token for a type named rather than resolved: the compiler | |
| 231 | // synthesises code around a few framework types it knows by | |
| 232 | // name and has no symbol for, the way the assert helper names | |
| 233 | // its own exception. | |
| 234 | resolve_type_token_by_name( | |
| 235 | assembly_name: string, | |
| 236 | namespace_name: string, | |
| 237 | name: string | |
| 238 | ) -> System.Reflection.Metadata.EntityHandle => | |
| 239 | cast System.Reflection.Metadata.EntityHandle( | |
| 240 | srm_assembly_emitter.add_type_reference_by_name( | |
| 241 | assembly_name, namespace_name, name)) | |
| 242 | ||
| 243 | resolve_type_token(type: Semantic.Types.Type) -> System.Reflection.Metadata.EntityHandle is | |
| 244 | let emitter = srm_assembly_emitter | |
| 245 | ||
| 246 | // A constructed generic has no row of its own, and neither | |
| 247 | // does a type parameter or a primitive: all three are | |
| 248 | // structural types, named by a specification carrying their | |
| 249 | // encoded shape. A primitive especially cannot be named by | |
| 250 | // reference — its il_name_override is the assembler keyword | |
| 251 | // (`int8`, `int32`), which is not what the type is called. | |
| 252 | if type.arguments.count > 0 \/ | |
| 253 | isa Semantic.Symbols.GenericArgument(type.symbol) \/ | |
| 254 | type.symbol.il_is_primitive_type | |
| 255 | then | |
| 256 | return cast System.Reflection.Metadata.EntityHandle( | |
| 257 | emitter.add_type_specification(type)) | |
| 258 | fi | |
| 259 | ||
| 260 | // Same unwrapping as the signature encoder: a constructed | |
| 261 | // generic's symbol holds the open definition rather than | |
| 262 | // being one, and only the definition has a row. | |
| 263 | let symbol = | |
| 264 | if let generic: Semantic.Symbols.GENERIC = type.symbol then | |
| 265 | generic.symbol | |
| 266 | else | |
| 267 | cast Semantic.Symbols.Classy?(type.symbol) | |
| 268 | fi | |
| 269 | ||
| 270 | assert symbol? else "cannot name the type '{type}' in an instruction" | |
| 271 | ||
| 272 | if let definition = emitter.handles.type_definition(symbol) then | |
| 273 | return cast System.Reflection.Metadata.EntityHandle(definition) | |
| 274 | fi | |
| 275 | ||
| 276 | return cast System.Reflection.Metadata.EntityHandle( | |
| 277 | Emitter.SRM_SIGNATURE_ENCODER(emitter).type_reference_for(symbol)) | |
| 278 | si | |
| 279 | ||
| 280 | // Invoking a function value calls Invoke on the delegate type. | |
| 281 | resolve_delegate_invoke( | |
| 282 | func_type: Semantic.Types.Type, | |
| 283 | argument_count: int, | |
| 284 | is_action: bool | |
| 285 | ) -> System.Reflection.Metadata.EntityHandle is | |
| 286 | let emitter = srm_assembly_emitter | |
| 287 | ||
| 288 | return cast System.Reflection.Metadata.EntityHandle( | |
| 289 | emitter.add_named_member_reference( | |
| 290 | resolve_type_token(func_type), | |
| 291 | "Invoke", | |
| 292 | "Invoke {func_type}", | |
| 293 | Emitter.SRM_SIGNATURE_ENCODER(emitter) | |
| 294 | .delegate_invoke_signature(argument_count, is_action))) | |
| 295 | si | |
| 296 | ||
| 297 | // An inference sentinel inside a type reaching code | |
| 298 | // generation means an inference gap upstream was never | |
| 299 | // reported as a diagnostic — the signature encoder refuses | |
| 300 | // sentinels, so without this check the gap surfaces as an | |
| 301 | // internal error deep in emission instead. | |
| 302 | contains_sentinel(type: Semantic.Types.Type?) -> bool static is | |
| 303 | if !type? then | |
| 304 | return false | |
| 305 | fi | |
| 306 | ||
| 307 | if type.is_sentinel then | |
| 308 | return true | |
| 309 | fi | |
| 310 | ||
| 311 | // Every composite that carries child types — arrays, | |
| 312 | // tuples, functions, refs, pointers, maybes — is a | |
| 313 | // GENERIC over them, so recursing over the arguments | |
| 314 | // visits the whole tree. | |
| 315 | if let generic: Semantic.Types.GENERIC = type then | |
| 316 | for argument in generic.arguments do | |
| 317 | if contains_sentinel(argument) then | |
| 318 | return true | |
| 319 | fi | |
| 320 | od | |
| 321 | fi | |
| 322 | ||
| 323 | return false | |
| 324 | si | |
| 325 | ||
| 326 | report_unresolved_type(location: Source.LOCATION, type: Semantic.Types.Type) is | |
| 327 | _logger.error( | |
| 328 | location, | |
| 329 | "cannot call a function value whose type was not fully inferred: '{type}'") | |
| 330 | si | |
| 331 | ||
| 332 | // A tuple and a wrapped optional are both a constructed generic | |
| 333 | // built from one value per type parameter, so both reach their | |
| 334 | // constructor the same way: through the owning TypeSpec, with | |
| 335 | // the parameters written as indexes. | |
| 336 | resolve_generic_constructor( | |
| 337 | type: Semantic.Types.Type, | |
| 338 | argument_count: int | |
| 339 | ) -> System.Reflection.Metadata.EntityHandle is | |
| 340 | let emitter = srm_assembly_emitter | |
| 341 | ||
| 342 | return cast System.Reflection.Metadata.EntityHandle( | |
| 343 | emitter.add_named_member_reference( | |
| 344 | resolve_type_token(type), | |
| 345 | ".ctor", | |
| 346 | ".ctor {type}/{argument_count}", | |
| 347 | Emitter.SRM_SIGNATURE_ENCODER(emitter) | |
| 348 | .generic_constructor_signature(argument_count))) | |
| 349 | si | |
| 350 | ||
| 351 | // `assert` joins its location to its message and wraps the | |
| 352 | // result in an exception. Both members belong to types no symbol | |
| 353 | // in this compilation names, so both are built from their known | |
| 354 | // shapes rather than read off a declaration. | |
| 355 | resolve_string_concat() -> System.Reflection.Metadata.EntityHandle is | |
| 356 | let emitter = srm_assembly_emitter | |
| 357 | let lookup = IoC.CONTAINER.instance.innate_symbol_lookup | |
| 358 | ||
| 359 | let arguments = Collections.LIST[Semantic.Types.Type]() | |
| 360 | ||
| 361 | arguments.add(lookup.get_object_type()) | |
| 362 | arguments.add(lookup.get_object_type()) | |
| 363 | ||
| 364 | return cast System.Reflection.Metadata.EntityHandle( | |
| 365 | emitter.add_named_member_reference( | |
| 366 | cast System.Reflection.Metadata.EntityHandle( | |
| 367 | emitter.add_type_reference_by_name("System.Runtime", "System", "String")), | |
| 368 | "Concat", | |
| 369 | "String::Concat(object,object)", | |
| 370 | Emitter.SRM_SIGNATURE_ENCODER(emitter) | |
| 371 | .static_signature(lookup.get_string_type(), arguments))) | |
| 372 | si | |
| 373 | ||
| 374 | // `=~` on two strings lowers to the framework's own equality | |
| 375 | // operator rather than to an instruction, so it needs a member | |
| 376 | // reference like any other imported static. | |
| 377 | resolve_string_equality() -> System.Reflection.Metadata.EntityHandle is | |
| 378 | let emitter = srm_assembly_emitter | |
| 379 | let lookup = IoC.CONTAINER.instance.innate_symbol_lookup | |
| 380 | ||
| 381 | let arguments = Collections.LIST[Semantic.Types.Type]() | |
| 382 | ||
| 383 | arguments.add(lookup.get_string_type()) | |
| 384 | arguments.add(lookup.get_string_type()) | |
| 385 | ||
| 386 | return cast System.Reflection.Metadata.EntityHandle( | |
| 387 | emitter.add_named_member_reference( | |
| 388 | cast System.Reflection.Metadata.EntityHandle( | |
| 389 | emitter.add_type_reference_by_name("System.Runtime", "System", "String")), | |
| 390 | "op_Equality", | |
| 391 | "String::op_Equality(string,string)", | |
| 392 | Emitter.SRM_SIGNATURE_ENCODER(emitter) | |
| 393 | .static_signature(lookup.get_bool_type(), arguments))) | |
| 394 | si | |
| 395 | ||
| 396 | // The two members of `EqualityComparer[T]` a value-equality test | |
| 397 | // over a bare type parameter goes through. Neither is declared by | |
| 398 | // any symbol in the compilation, so each is built from its known | |
| 399 | // shape. | |
| 400 | // | |
| 401 | // The reference hangs off the caller's instantiation while the | |
| 402 | // signature is written in the comparer's own terms — `!0` is the | |
| 403 | // comparer's type parameter, not the caller's — the same open-form | |
| 404 | // rule every other methodref on a constructed generic follows. | |
| 405 | resolve_equality_comparer_default( | |
| 406 | comparer_type: Semantic.Types.Type | |
| 407 | ) -> System.Reflection.Metadata.EntityHandle is | |
| 408 | let emitter = srm_assembly_emitter | |
| 409 | ||
| 410 | let classy = _comparer_classy(comparer_type) | |
| 411 | ||
| 412 | return cast System.Reflection.Metadata.EntityHandle( | |
| 413 | emitter.add_named_member_reference( | |
| 414 | resolve_type_token(comparer_type), | |
| 415 | "get_Default", | |
| 416 | "EqualityComparer::get_Default()", | |
| 417 | Emitter.SRM_SIGNATURE_ENCODER(emitter) | |
| 418 | .static_signature(classy.own_instantiation, Collections.LIST[Semantic.Types.Type]()))) | |
| 419 | si | |
| 420 | ||
| 421 | resolve_equality_comparer_equals( | |
| 422 | comparer_type: Semantic.Types.Type | |
| 423 | ) -> System.Reflection.Metadata.EntityHandle is | |
| 424 | let emitter = srm_assembly_emitter | |
| 425 | let lookup = IoC.CONTAINER.instance.innate_symbol_lookup | |
| 426 | ||
| 427 | let parameter = _comparer_classy(comparer_type).type_parameter_at(0) | |
| 428 | let arguments = Collections.LIST[Semantic.Types.Type]() | |
| 429 | ||
| 430 | arguments.add(parameter!.type!) | |
| 431 | arguments.add(parameter.type!) | |
| 432 | ||
| 433 | return cast System.Reflection.Metadata.EntityHandle( | |
| 434 | emitter.add_named_member_reference( | |
| 435 | resolve_type_token(comparer_type), | |
| 436 | "Equals", | |
| 437 | "EqualityComparer::Equals(!0,!0)", | |
| 438 | Emitter.SRM_SIGNATURE_ENCODER(emitter) | |
| 439 | .call_signature(lookup.get_bool_type(), arguments, true))) | |
| 440 | si | |
| 441 | ||
| 442 | // A constructed generic's symbol is a `Symbols.GENERIC` holding | |
| 443 | // the open definition rather than being one. | |
| 444 | _comparer_classy(comparer_type: Semantic.Types.Type) -> Semantic.Symbols.Classy is | |
| 445 | if let generic: Semantic.Symbols.GENERIC = comparer_type.symbol then | |
| 446 | return cast Semantic.Symbols.Classy(generic.symbol) | |
| 447 | fi | |
| 448 | ||
| 449 | return cast Semantic.Symbols.Classy?(comparer_type.symbol)! | |
| 450 | si | |
| 451 | ||
| 452 | // The constructor of the exception a body-less class method | |
| 453 | // throws when it is called: it overrides an implemented member, | |
| 454 | // so it has a slot to fill and nothing to fill it with. | |
| 455 | resolve_not_implemented_constructor() -> System.Reflection.Metadata.EntityHandle is | |
| 456 | let emitter = srm_assembly_emitter | |
| 457 | let lookup = IoC.CONTAINER.instance.innate_symbol_lookup | |
| 458 | ||
| 459 | let arguments = Collections.LIST[Semantic.Types.Type]() | |
| 460 | ||
| 461 | arguments.add(lookup.get_string_type()) | |
| 462 | ||
| 463 | return cast System.Reflection.Metadata.EntityHandle( | |
| 464 | emitter.add_constructor_reference( | |
| 465 | cast System.Reflection.Metadata.EntityHandle( | |
| 466 | emitter.add_type_reference_by_name( | |
| 467 | "System.Runtime", "System", "NotImplementedException")), | |
| 468 | "NotImplementedException::.ctor(string)", | |
| 469 | arguments)) | |
| 470 | si | |
| 471 | ||
| 472 | resolve_not_supported_constructor() -> System.Reflection.Metadata.EntityHandle is | |
| 473 | let emitter = srm_assembly_emitter | |
| 474 | ||
| 475 | return cast System.Reflection.Metadata.EntityHandle( | |
| 476 | emitter.add_constructor_reference( | |
| 477 | cast System.Reflection.Metadata.EntityHandle( | |
| 478 | emitter.add_type_reference_by_name( | |
| 479 | "System.Runtime", "System", "NotSupportedException")), | |
| 480 | "NotSupportedException::.ctor()", | |
| 481 | Collections.LIST[Semantic.Types.Type]())) | |
| 482 | si | |
| 483 | ||
| 484 | resolve_assert_failed_constructor() -> System.Reflection.Metadata.EntityHandle is | |
| 485 | let emitter = srm_assembly_emitter | |
| 486 | let lookup = IoC.CONTAINER.instance.innate_symbol_lookup | |
| 487 | ||
| 488 | let arguments = Collections.LIST[Semantic.Types.Type]() | |
| 489 | ||
| 490 | arguments.add(lookup.get_string_type()) | |
| 491 | ||
| 492 | return cast System.Reflection.Metadata.EntityHandle( | |
| 493 | emitter.add_constructor_reference( | |
| 494 | cast System.Reflection.Metadata.EntityHandle( | |
| 495 | emitter.add_type_reference_by_name( | |
| 496 | "ghul-runtime", "Ghul", "AssertFailedException")), | |
| 497 | "AssertFailedException::.ctor(string)", | |
| 498 | arguments)) | |
| 499 | si | |
| 500 | ||
| 501 | // The free function a state-machine frame's ToString calls to | |
| 502 | // render itself the way the runtime's own pipes do: | |
| 503 | // `Ghul.Pipes.render_elements(source)`, or `Ghul.Pipes.join(source)` | |
| 504 | // from a runtime too old to have it. The `Pipe[T]` trait's own | |
| 505 | // to_string is a default interface method and so does not | |
| 506 | // override Object.ToString, and a frame that called the trait | |
| 507 | // member would reach its own override and recurse. | |
| 508 | resolve_pipe_join( | |
| 509 | element_type: Semantic.Types.Type | |
| 510 | ) -> System.Reflection.Metadata.EntityHandle is | |
| 511 | let lookup = IoC.CONTAINER.instance.innate_symbol_lookup | |
| 512 | ||
| 513 | let functions = lookup.get_render_elements_functions() ?? lookup.get_join_functions() | |
| 514 | ||
| 515 | assert functions? else "Ghul.Pipes.join is not available" | |
| 516 | ||
| 517 | let single_argument: Semantic.Symbols.Function? mut = null | |
| 518 | ||
| 519 | for f in functions.functions do | |
| 520 | if f.arguments.count == 1 then | |
| 521 | single_argument = f | |
| 522 | fi | |
| 523 | od | |
| 524 | ||
| 525 | assert single_argument? else | |
| 526 | "Ghul.Pipes.join has no single-argument overload" | |
| 527 | ||
| 528 | let specialized = | |
| 529 | cast Semantic.Symbols.Function?( | |
| 530 | single_argument.specialize( | |
| 531 | Collections.LIST[Semantic.Types.Type]([element_type]))) | |
| 532 | ||
| 533 | assert specialized? else | |
| 534 | "Ghul.Pipes.join could not be specialized over {element_type}" | |
| 535 | ||
| 536 | return resolve_call_target(specialized) | |
| 537 | si | |
| 538 | ||
| 539 | // The builder members an async lowering reaches, located by their | |
| 540 | // ghul names on the builder type - the same lookup for a reflected | |
| 541 | // builder, whose members import under these names, and for one | |
| 542 | // declared in ghul source. Resolution goes through the ordinary | |
| 543 | // call-target machinery, so a same-assembly builder is called | |
| 544 | // through its own definition row and a reflected one through a | |
| 545 | // member reference, each with a signature read off the member | |
| 546 | // rather than written out here. | |
| 547 | resolve_builder_member( | |
| 548 | builder_type: Semantic.Types.Type, | |
| 549 | name: string, | |
| 550 | argument_count: int | |
| 551 | ) -> System.Reflection.Metadata.EntityHandle is | |
| 552 | let member = Semantic.TASK_LIKE.member_of_arity(builder_type, name, argument_count) | |
| 553 | ||
| 554 | assert member? else "no {name}/{argument_count} member on builder {builder_type}" | |
| 555 | ||
| 556 | return resolve_call_target(member) | |
| 557 | si | |
| 558 | ||
| 559 | resolve_builder_property( | |
| 560 | builder_type: Semantic.Types.Type, | |
| 561 | name: string | |
| 562 | ) -> System.Reflection.Metadata.EntityHandle is | |
| 563 | let property = cast Semantic.Symbols.Property?(builder_type.find_member(name)) | |
| 564 | ||
| 565 | assert property? /\ property.read_function? else | |
| 566 | "no readable {name} property on builder {builder_type}" | |
| 567 | ||
| 568 | return resolve_call_target(property.read_function) | |
| 569 | si | |
| 570 | ||
| 571 | // Whether the builder's await-on-completed member takes the state | |
| 572 | // machine by reference (the shape the BCL builders use) or by | |
| 573 | // value as the interface (which lets a builder register a | |
| 574 | // method value as the continuation, with no closure). | |
| 575 | builder_awaits_sm_by_reference( | |
| 576 | builder_type: Semantic.Types.Type, | |
| 577 | is_critical: bool | |
| 578 | ) -> bool is | |
| 579 | let name = | |
| 580 | if is_critical then | |
| 581 | "await_unsafe_on_completed" | |
| 582 | else | |
| 583 | "await_on_completed" | |
| 584 | fi | |
| 585 | ||
| 586 | let member = Semantic.TASK_LIKE.member_of_arity(builder_type, name, 2) | |
| 587 | ||
| 588 | if !member? then | |
| 589 | return true | |
| 590 | fi | |
| 591 | ||
| 592 | return isa Semantic.Types.REFERENCE(member.arguments[1]) | |
| 593 | si | |
| 594 | ||
| 595 | // A generic builder member - `start[A](a: A ref)` or | |
| 596 | // `await_on_completed[A, S](a: A ref, s: S ref)`. The reference | |
| 597 | // names the open method and a specification supplies the | |
| 598 | // construction types, which no member specialization carries. | |
| 599 | resolve_builder_generic_member( | |
| 600 | builder_type: Semantic.Types.Type, | |
| 601 | name: string, | |
| 602 | argument_count: int, | |
| 603 | type_arguments: Collections.List[Semantic.Types.Type] | |
| 604 | ) -> System.Reflection.Metadata.EntityHandle is | |
| 605 | let emitter = srm_assembly_emitter | |
| 606 | ||
| 607 | let member = Semantic.TASK_LIKE.member_of_arity(builder_type, name, argument_count) | |
| 608 | ||
| 609 | assert member? else "no {name}/{argument_count} member on builder {builder_type}" | |
| 610 | ||
| 611 | let root = cast Semantic.Symbols.Function?(member.root_specialized_from) ?? member | |
| 612 | ||
| 613 | let reference = | |
| 614 | emitter.add_named_member_reference( | |
| 615 | _member_owner_handle(member), | |
| 616 | Emitter.SRM_FLAGS.method_name(root), | |
| 617 | "method {member.owner}::{root.description}", | |
| 618 | Emitter.SRM_SIGNATURE_ENCODER(emitter).method_signature(root)) | |
| 619 | ||
| 620 | return cast System.Reflection.Metadata.EntityHandle( | |
| 621 | emitter.add_method_specification( | |
| 622 | cast System.Reflection.Metadata.EntityHandle(reference), | |
| 623 | "{member}", | |
| 624 | type_arguments)) | |
| 625 | si | |
| 626 | ||
| 627 | ||
| 628 | // `start[A](state_machine: A ref)` is generic in the state machine | |
| 629 | // it drives, so the reference names the open method and a | |
| 630 | // specification supplies the frame type. | |
| 631 | resolve_async_builder_start( | |
| 632 | builder_type: Semantic.Types.Type, | |
| 633 | state_machine_type: Semantic.Types.Type | |
| 634 | ) -> System.Reflection.Metadata.EntityHandle is | |
| 635 | let arguments = Collections.LIST[Semantic.Types.Type]() | |
| 636 | ||
| 637 | arguments.add(state_machine_type) | |
| 638 | ||
| 639 | return resolve_builder_generic_member(builder_type, "start", 1, arguments) | |
| 640 | si | |
| 641 | ||
| 642 | // The builder method that registers an await's continuation: | |
| 643 | // `await_unsafe_on_completed` for an awaiter implementing | |
| 644 | // `ICriticalNotifyCompletion`, `await_on_completed` otherwise. | |
| 645 | // Both are generic in the awaiter and the state machine. | |
| 646 | resolve_await_on_completed( | |
| 647 | builder_type: Semantic.Types.Type, | |
| 648 | awaiter_type: Semantic.Types.Type, | |
| 649 | state_machine_type: Semantic.Types.Type, | |
| 650 | is_critical: bool | |
| 651 | ) -> System.Reflection.Metadata.EntityHandle is | |
| 652 | let name = | |
| 653 | if is_critical then | |
| 654 | "await_unsafe_on_completed" | |
| 655 | else | |
| 656 | "await_on_completed" | |
| 657 | fi | |
| 658 | ||
| 659 | let arguments = Collections.LIST[Semantic.Types.Type]() | |
| 660 | ||
| 661 | arguments.add(awaiter_type) | |
| 662 | ||
| 663 | // The specification names one type argument per method type | |
| 664 | // parameter: a member typing the state machine as the | |
| 665 | // interface has only the awaiter's. | |
| 666 | let member = Semantic.TASK_LIKE.member_of_arity(builder_type, name, 2) | |
| 667 | ||
| 668 | if !member? \/ member.generic_arguments.count > 1 then | |
| 669 | arguments.add(state_machine_type) | |
| 670 | fi | |
| 671 | ||
| 672 | return resolve_builder_generic_member(builder_type, name, 2, arguments) | |
| 673 | si | |
| 674 | ||
| 675 | // `System.Type.GetTypeFromHandle`, which turns the handle | |
| 676 | // `ldtoken` pushes into the `System.Type` a `typeof` yields. | |
| 677 | // Neither the method nor either of the types it mentions is | |
| 678 | // declared by any symbol in the compilation. | |
| 679 | resolve_get_type_from_handle() -> System.Reflection.Metadata.EntityHandle is | |
| 680 | let emitter = srm_assembly_emitter | |
| 681 | ||
| 682 | let system_type = | |
| 683 | emitter.add_type_reference_by_name("System.Runtime", "System", "Type") | |
| 684 | ||
| 685 | let handle_type = | |
| 686 | emitter.add_type_reference_by_name( | |
| 687 | "System.Runtime", "System", "RuntimeTypeHandle") | |
| 688 | ||
| 689 | let builder = System.Reflection.Metadata.BlobBuilder(16) | |
| 690 | ||
| 691 | let return_type: System.Reflection.Metadata.Ecma335.ReturnTypeEncoder mut | |
| 692 | let parameters: System.Reflection.Metadata.Ecma335.ParametersEncoder mut | |
| 693 | ||
| 694 | System.Reflection.Metadata.Ecma335.BlobEncoder(builder) | |
| 695 | .method_signature( | |
| 696 | System.Reflection.Metadata.SignatureCallingConvention.DEFAULT, 0, false) | |
| 697 | .parameters(1, return_type ref, parameters ref) | |
| 698 | ||
| 699 | return_type.`type(false).`type( | |
| 700 | cast System.Reflection.Metadata.EntityHandle(system_type), false) | |
| 701 | ||
| 702 | parameters.add_parameter().`type(false).`type( | |
| 703 | cast System.Reflection.Metadata.EntityHandle(handle_type), true) | |
| 704 | ||
| 705 | return cast System.Reflection.Metadata.EntityHandle( | |
| 706 | emitter.add_named_member_reference( | |
| 707 | cast System.Reflection.Metadata.EntityHandle(system_type), | |
| 708 | "GetTypeFromHandle", | |
| 709 | "System.Type::GetTypeFromHandle(RuntimeTypeHandle)", | |
| 710 | builder.to_array())) | |
| 711 | si | |
| 712 | ||
| 713 | // MoveNext.s trailer completes the task through `set_result`. A | |
| 714 | // builder can declare both the parameterless and the one-argument | |
| 715 | // overload; the one reached is chosen by whether there is a | |
| 716 | // result to deliver. | |
| 717 | resolve_async_builder_set_result( | |
| 718 | builder_type: Semantic.Types.Type, | |
| 719 | has_result: bool | |
| 720 | ) -> System.Reflection.Metadata.EntityHandle is | |
| 721 | return resolve_builder_member( | |
| 722 | builder_type, "set_result", if has_result then 1 else 0 fi) | |
| 723 | si | |
| 724 | ||
| 725 | resolve_async_builder_set_exception( | |
| 726 | builder_type: Semantic.Types.Type | |
| 727 | ) -> System.Reflection.Metadata.EntityHandle => | |
| 728 | resolve_builder_member(builder_type, "set_exception", 1) | |
| 729 | ||
| 730 | // `System.Object`'s constructor, which every constructor that | |
| 731 | // does not chain to a declared superclass calls first. Named | |
| 732 | // here because no symbol in the compilation declares it. | |
| 733 | resolve_object_constructor() -> System.Reflection.Metadata.EntityHandle is | |
| 734 | let emitter = srm_assembly_emitter | |
| 735 | ||
| 736 | return cast System.Reflection.Metadata.EntityHandle( | |
| 737 | emitter.add_constructor_reference( | |
| 738 | cast System.Reflection.Metadata.EntityHandle( | |
| 739 | emitter.add_type_reference_by_name("System.Runtime", "System", "Object")), | |
| 740 | "Object::.ctor()", | |
| 741 | Collections.LIST[Semantic.Types.Type]())) | |
| 742 | si | |
| 743 | ||
| 744 | // `System.Object.GetType()`. `!` on a plain reference-typed | |
| 745 | // `T?` calls it through a dup-and-discard so the runtime's own | |
| 746 | // null check does the throwing; named here for the same reason | |
| 747 | // as `Object`'s constructor: no symbol in the compilation | |
| 748 | // declares it. | |
| 749 | resolve_object_get_type() -> System.Reflection.Metadata.EntityHandle is | |
| 750 | let emitter = srm_assembly_emitter | |
| 751 | ||
| 752 | let object_type = | |
| 753 | emitter.add_type_reference_by_name("System.Runtime", "System", "Object") | |
| 754 | ||
| 755 | let type_type = | |
| 756 | emitter.add_type_reference_by_name("System.Runtime", "System", "Type") | |
| 757 | ||
| 758 | return cast System.Reflection.Metadata.EntityHandle( | |
| 759 | emitter.add_named_member_reference( | |
| 760 | cast System.Reflection.Metadata.EntityHandle(object_type), | |
| 761 | "GetType", | |
| 762 | "Object::GetType()", | |
| 763 | Emitter.SRM_SIGNATURE_ENCODER(emitter) | |
| 764 | .nullary_instance_signature(cast System.Reflection.Metadata.EntityHandle(type_type)))) | |
| 765 | si | |
| 766 | ||
| 767 | // `System.Decimal`'s full-resolution constructor, which a | |
| 768 | // decimal literal is built through. Named here for the same | |
| 769 | // reason as `Object`'s: no symbol in the compilation declares | |
| 770 | // it. | |
| 771 | resolve_decimal_constructor() -> System.Reflection.Metadata.EntityHandle is | |
| 772 | let emitter = srm_assembly_emitter | |
| 773 | let lookup = IoC.CONTAINER.instance.innate_symbol_lookup | |
| 774 | ||
| 775 | let arguments = Collections.LIST[Semantic.Types.Type]() | |
| 776 | ||
| 777 | arguments.add(lookup.get_int_type()) | |
| 778 | arguments.add(lookup.get_int_type()) | |
| 779 | arguments.add(lookup.get_int_type()) | |
| 780 | arguments.add(lookup.get_bool_type()) | |
| 781 | arguments.add(lookup.get_ubyte_type()) | |
| 782 | ||
| 783 | return cast System.Reflection.Metadata.EntityHandle( | |
| 784 | emitter.add_constructor_reference( | |
| 785 | resolve_type_token_by_name("System.Runtime", "System", "Decimal"), | |
| 786 | "Decimal::.ctor(int32, int32, int32, bool, unsigned int8)", | |
| 787 | arguments)) | |
| 788 | si | |
| 789 | ||
| 790 | // `System.Numerics.BigInteger`'s single-`long` constructor and | |
| 791 | // its `Parse`, which a `bigint` literal is built through. Named | |
| 792 | // here for the same reason as `Decimal`'s constructor: no symbol | |
| 793 | // in the compilation declares either. | |
| 794 | resolve_bigint_constructor(bigint_type: Semantic.Types.Type) -> System.Reflection.Metadata.EntityHandle is | |
| 795 | let emitter = srm_assembly_emitter | |
| 796 | let lookup = IoC.CONTAINER.instance.innate_symbol_lookup | |
| 797 | ||
| 798 | let arguments = Collections.LIST[Semantic.Types.Type]() | |
| 799 | ||
| 800 | arguments.add(lookup.get_long_type()) | |
| 801 | ||
| 802 | return cast System.Reflection.Metadata.EntityHandle( | |
| 803 | emitter.add_constructor_reference( | |
| 804 | resolve_type_token(bigint_type), | |
| 805 | "BigInteger::.ctor(int64)", | |
| 806 | arguments)) | |
| 807 | si | |
| 808 | ||
| 809 | resolve_bigint_parse(bigint_type: Semantic.Types.Type) -> System.Reflection.Metadata.EntityHandle is | |
| 810 | let emitter = srm_assembly_emitter | |
| 811 | let lookup = IoC.CONTAINER.instance.innate_symbol_lookup | |
| 812 | ||
| 813 | let arguments = Collections.LIST[Semantic.Types.Type]() | |
| 814 | ||
| 815 | arguments.add(lookup.get_string_type()) | |
| 816 | ||
| 817 | return cast System.Reflection.Metadata.EntityHandle( | |
| 818 | emitter.add_named_member_reference( | |
| 819 | resolve_type_token(bigint_type), | |
| 820 | "Parse", | |
| 821 | "BigInteger::Parse(string)", | |
| 822 | Emitter.SRM_SIGNATURE_ENCODER(emitter) | |
| 823 | .static_signature(bigint_type, arguments))) | |
| 824 | si | |
| 825 | ||
| 826 | // A static method on `System.Decimal`. Decimal has no IL | |
| 827 | // opcodes of its own, so both its arithmetic and its | |
| 828 | // conversions to and from other scalars are calls to one of | |
| 829 | // these. | |
| 830 | resolve_decimal_method( | |
| 831 | method_name: string, | |
| 832 | parameter_types: Collections.List[Semantic.Types.Type], | |
| 833 | return_type: Semantic.Types.Type | |
| 834 | ) -> System.Reflection.Metadata.EntityHandle is | |
| 835 | let emitter = srm_assembly_emitter | |
| 836 | ||
| 837 | return cast System.Reflection.Metadata.EntityHandle( | |
| 838 | emitter.add_named_member_reference( | |
| 839 | resolve_type_token_by_name("System.Runtime", "System", "Decimal"), | |
| 840 | method_name, | |
| 841 | "Decimal::{method_name}/{parameter_types.count} -> {return_type}", | |
| 842 | Emitter.SRM_SIGNATURE_ENCODER(emitter) | |
| 843 | .static_signature(return_type, parameter_types))) | |
| 844 | si | |
| 845 | ||
| 846 | // A range struct is constructed from its two integer bounds. | |
| 847 | resolve_range_constructor( | |
| 848 | range_type: Semantic.Types.Type | |
| 849 | ) -> System.Reflection.Metadata.EntityHandle is | |
| 850 | let emitter = srm_assembly_emitter | |
| 851 | let lookup = IoC.CONTAINER.instance.innate_symbol_lookup | |
| 852 | ||
| 853 | let arguments = Collections.LIST[Semantic.Types.Type]() | |
| 854 | ||
| 855 | arguments.add(lookup.get_int_type()) | |
| 856 | arguments.add(lookup.get_int_type()) | |
| 857 | ||
| 858 | return cast System.Reflection.Metadata.EntityHandle( | |
| 859 | emitter.add_constructor_reference( | |
| 860 | resolve_type_token(range_type), | |
| 861 | "range .ctor {range_type}", | |
| 862 | arguments)) | |
| 863 | si | |
| 864 | ||
| 865 | // A delegate is constructed from a receiver and a function | |
| 866 | // pointer, so its constructor always takes (object, native int). | |
| 867 | // The delegate type is normally a constructed generic, which | |
| 868 | // has no reference row of its own: its TypeSpec is the owner. | |
| 869 | resolve_delegate_constructor( | |
| 870 | delegate_type: Semantic.Types.Type | |
| 871 | ) -> System.Reflection.Metadata.EntityHandle is | |
| 872 | let emitter = srm_assembly_emitter | |
| 873 | let lookup = IoC.CONTAINER.instance.innate_symbol_lookup | |
| 874 | ||
| 875 | let arguments = Collections.LIST[Semantic.Types.Type]() | |
| 876 | ||
| 877 | arguments.add(lookup.get_object_type()) | |
| 878 | arguments.add(lookup.get_word_type()) | |
| 879 | ||
| 880 | return cast System.Reflection.Metadata.EntityHandle( | |
| 881 | emitter.add_constructor_reference( | |
| 882 | resolve_type_token(delegate_type), | |
| 883 | "delegate .ctor {delegate_type}", | |
| 884 | arguments)) | |
| 885 | si | |
| 886 | ||
| 887 | // The metadata token naming a field, for a load or store. | |
| 888 | // Same rule as resolve_call_target: a field this assembly | |
| 889 | // defines is named by its own FieldDef row, whose number the | |
| 890 | // numbering pass has already fixed. | |
| 891 | resolve_field_target(`field: Semantic.Symbols.Field) -> System.Reflection.Metadata.EntityHandle is | |
| 892 | let emitter = srm_assembly_emitter | |
| 893 | ||
| 894 | if let definition = emitter.handles.field_definition(`field) then | |
| 895 | if !_owner_is_generic(`field) then | |
| 896 | return cast System.Reflection.Metadata.EntityHandle(definition) | |
| 897 | fi | |
| 898 | fi | |
| 899 | ||
| 900 | let root = cast Semantic.Symbols.Field?(`field.root_specialized_from) ?? `field | |
| 901 | ||
| 902 | // The parent names the constructed owner while the name and | |
| 903 | // signature come from the open definition: a reference to a | |
| 904 | // field of `Pair[int]` hangs off a specification for that | |
| 905 | // instantiation, and says its type is `!0`. Taking both from | |
| 906 | // the unspecialized field points the reference at the open | |
| 907 | // type, which is not a type any instantiation has. | |
| 908 | // | |
| 909 | // The name is the CLR one. A reflected member can be | |
| 910 | // renamed on the way in — a tuple's `Item1` is `0` in ghūl — | |
| 911 | // and it is the original the metadata has to carry. | |
| 912 | return cast System.Reflection.Metadata.EntityHandle( | |
| 913 | emitter.add_named_member_reference( | |
| 914 | _member_owner_handle(`field), | |
| 915 | root.il_name, | |
| 916 | "field {root.owner}::{root.il_name}", | |
| 917 | Emitter.SRM_SIGNATURE_ENCODER(emitter).field_signature(root))) | |
| 918 | si | |
| 919 | ||
| 920 | // Whether a member is declared by a generic type. | |
| 921 | // | |
| 922 | // A member of one cannot be named by its own definition row even | |
| 923 | // when this assembly declares it: within the type's own methods | |
| 924 | // the receiver is the type applied to its own parameters, and a | |
| 925 | // definition row names the open type, which no instantiation is. | |
| 926 | _owner_is_generic(member: Semantic.Symbols.Symbol) -> bool is | |
| 927 | let owner = _owning_scope(member) | |
| 928 | ||
| 929 | if isa Semantic.Symbols.GENERIC(owner) then | |
| 930 | return true | |
| 931 | fi | |
| 932 | ||
| 933 | if let classy: Semantic.Symbols.Classy = owner then | |
| 934 | return classy.is_generic | |
| 935 | fi | |
| 936 | ||
| 937 | return false | |
| 938 | si | |
| 939 | ||
| 940 | // An `impl` or `partial` block owns its members through the | |
| 941 | // block's own scope, but they are members of the type the block | |
| 942 | // injects into, and it is that type they hang off. | |
| 943 | _owning_scope(member: Semantic.Symbols.Symbol) -> Semantic.Scope? => | |
| 944 | if let injection: Semantic.INJECTION_SCOPE = member.owner then | |
| 945 | injection.target | |
| 946 | else | |
| 947 | member.owner | |
| 948 | fi | |
| 949 | ||
| 950 | // The reference row for the type an imported member hangs off. | |
| 951 | // A global function or variable hangs off its namespace's | |
| 952 | // globals carrier, which is a naming convention rather than a | |
| 953 | // declared type; everything else hangs off its owning type. | |
| 954 | _member_owner_handle( | |
| 955 | member: Semantic.Symbols.Symbol | |
| 956 | ) -> System.Reflection.Metadata.EntityHandle is | |
| 957 | let emitter = srm_assembly_emitter | |
| 958 | ||
| 959 | let owner = _owning_scope(member) | |
| 960 | ||
| 961 | // A member of a constructed generic hangs off the | |
| 962 | // instantiation, which is named by a specification. The | |
| 963 | // open type's own reference names a type of no arguments | |
| 964 | // by that name, which does not exist, so a reference | |
| 965 | // through it fails to load. | |
| 966 | if let constructed: Semantic.Symbols.GENERIC = owner then | |
| 967 | return resolve_type_token(constructed.type) | |
| 968 | fi | |
| 969 | ||
| 970 | // A member reached from inside its own generic type: the | |
| 971 | // receiver is that type applied to its own parameters, so | |
| 972 | // the reference hangs off a specification for exactly that, | |
| 973 | // rendered `Type<!0, !1, ...>`. | |
| 974 | // | |
| 975 | // `Classy.type` is the *open* type (`Types.NAMED(self)`), so | |
| 976 | // the instantiation has to be built here from the type | |
| 977 | // parameters the class declared into its own scope. | |
| 978 | if let classy: Semantic.Symbols.Classy = owner then | |
| 979 | if classy.is_generic then | |
| 980 | return cast System.Reflection.Metadata.EntityHandle( | |
| 981 | emitter.add_type_specification(classy.own_instantiation)) | |
| 982 | fi | |
| 983 | fi | |
| 984 | ||
| 985 | // An imported global hangs off the carrier that holds it. A | |
| 986 | // namespace can have several - one per assembly contributing | |
| 987 | // globals to it, and a staging namespace re-homed onto it - so | |
| 988 | // the carrier comes from the member rather than from the | |
| 989 | // namespace it was re-homed onto. | |
| 990 | let carrier = | |
| 991 | if let global_function: Semantic.Symbols.GLOBAL_FUNCTION = member then | |
| 992 | global_function.il_carrier | |
| 993 | elif let global_variable: Semantic.Symbols.GLOBAL_VARIABLE = member then | |
| 994 | global_variable.il_carrier | |
| 995 | else | |
| 996 | null | |
| 997 | fi | |
| 998 | ||
| 999 | if carrier? then | |
| 1000 | return cast System.Reflection.Metadata.EntityHandle( | |
| 1001 | Emitter.SRM_SIGNATURE_ENCODER(emitter).type_reference_for(carrier)) | |
| 1002 | fi | |
| 1003 | ||
| 1004 | let owner_namespace = | |
| 1005 | if let declared: Semantic.Symbols.NAMESPACE = owner then | |
| 1006 | declared | |
| 1007 | elif let scope: Semantic.NAMESPACE_SCOPE = owner then | |
| 1008 | scope.containing_namespace | |
| 1009 | else | |
| 1010 | null | |
| 1011 | fi | |
| 1012 | ||
| 1013 | assert !owner_namespace? else | |
| 1014 | "'{member.qualified_name}' is a global of a referenced assembly with no carrier recorded" | |
| 1015 | ||
| 1016 | let owner_classy = cast Semantic.Symbols.Classy?(owner) | |
| 1017 | ||
| 1018 | assert owner_classy? else "cannot reference a member owned by {owner}" | |
| 1019 | ||
| 1020 | // A type this assembly defines is named by its own | |
| 1021 | // definition row rather than by a reference into another | |
| 1022 | // assembly. The row does not exist yet — the numbering pass | |
| 1023 | // fixed which row it will be, and the token resolves once | |
| 1024 | // the structure walk writes it. | |
| 1025 | // | |
| 1026 | // This comes after the generic branches above: a definition | |
| 1027 | // row names the open type, so an instantiation still needs | |
| 1028 | // a specification even when this assembly declares it. | |
| 1029 | if let definition = emitter.handles.type_definition(owner_classy) then | |
| 1030 | return cast System.Reflection.Metadata.EntityHandle(definition) | |
| 1031 | fi | |
| 1032 | ||
| 1033 | // il_name_override on an imported type is the CLR-side | |
| 1034 | // dotted full name, unlike qualified_name which is the | |
| 1035 | // ghūl-mapped spelling (e.g. "IO.Std" for System.Console). | |
| 1036 | let il_name = | |
| 1037 | owner_classy.il_name_override ?? owner_classy.qualified_name | |
| 1038 | ||
| 1039 | let clr_type_name = | |
| 1040 | Emitter.SRM_SIGNATURE_ENCODER.clr_name_for_primitive(il_name) ?? il_name | |
| 1041 | ||
| 1042 | return cast System.Reflection.Metadata.EntityHandle( | |
| 1043 | Emitter.SRM_SIGNATURE_ENCODER(emitter).reference_for_clr_name( | |
| 1044 | owner_classy, | |
| 1045 | _referenced_assembly(owner_classy.il_assembly_name ?? "", owner_classy), | |
| 1046 | clr_type_name)) | |
| 1047 | si | |
| 1048 | ||
| 1049 | // A type reference names the assembly it points into, which has | |
| 1050 | // to have a row of its own before anything can name it. | |
| 1051 | // | |
| 1052 | // An empty name is not a usable reference: it produces a row the | |
| 1053 | // runtime resolves to the assembly being built, so every type | |
| 1054 | // named through it appears to be one this assembly defines and | |
| 1055 | // fails to load. Refuse it rather than emit that. | |
| 1056 | _referenced_assembly(assembly_name: string, owner: Semantic.Symbols.Symbol) -> string is | |
| 1057 | assert assembly_name.length > 0 else | |
| 1058 | "'{owner.qualified_name}' names no assembly to reference it through" | |
| 1059 | ||
| 1060 | srm_assembly_emitter.add_assembly_reference(assembly_name) | |
| 1061 | ||
| 1062 | return assembly_name | |
| 1063 | si | |
| 1064 | ||
| 1065 | resolve_call_target(function: Semantic.Symbols.Function) -> System.Reflection.Metadata.EntityHandle is | |
| 1066 | let emitter = srm_assembly_emitter | |
| 1067 | ||
| 1068 | // A target this assembly defines is called through its own | |
| 1069 | // MethodDef row. The row does not exist yet — the numbering | |
| 1070 | // pass fixed which row it will be, and the token embedded | |
| 1071 | // here resolves once the structure walk writes it. | |
| 1072 | // | |
| 1073 | // Two cases cannot use it. A member of a generic type needs | |
| 1074 | // a reference through the instantiation, because a | |
| 1075 | // definition row names the open type. A generic method | |
| 1076 | // called at an instantiation needs a MethodSpec over its | |
| 1077 | // open definition, because a definition row names the | |
| 1078 | // uninstantiated method and the runtime refuses to call one. | |
| 1079 | if let definition = emitter.handles.method_definition(function) then | |
| 1080 | if !_owner_is_generic(function) /\ function.generic_arguments.count == 0 then | |
| 1081 | return cast System.Reflection.Metadata.EntityHandle(definition) | |
| 1082 | fi | |
| 1083 | fi | |
| 1084 | ||
| 1085 | // An instantiation of a generic method is named by a | |
| 1086 | // MethodSpec over the open method, not by a reference of its | |
| 1087 | // own: the reference carries the method's own type | |
| 1088 | // parameters as indexes, and the arguments live in the spec. | |
| 1089 | let root = cast Semantic.Symbols.Function?(function.root_specialized_from) ?? function | |
| 1090 | ||
| 1091 | // The open method this assembly defines is already a row of | |
| 1092 | // its own, and a MethodSpec can name it directly. Building a | |
| 1093 | // reference to it instead would name the same method twice, | |
| 1094 | // once as a definition and once as a reference into this | |
| 1095 | // assembly, which is not a shape the format has. | |
| 1096 | // | |
| 1097 | // Only when the owner is non-generic. A generic method on a | |
| 1098 | // generic type needs both instantiations — the owner's, in a | |
| 1099 | // reference through its TypeSpec, and the method's own — and | |
| 1100 | // a definition row carries neither. | |
| 1101 | if !_owner_is_generic(function) /\ function.generic_arguments.count > 0 then | |
| 1102 | if let open_row = emitter.handles.method_definition(root) then | |
| 1103 | return cast System.Reflection.Metadata.EntityHandle( | |
| 1104 | emitter.add_method_specification( | |
| 1105 | cast System.Reflection.Metadata.EntityHandle(open_row), | |
| 1106 | "{function}", | |
| 1107 | function.generic_arguments)) | |
| 1108 | fi | |
| 1109 | fi | |
| 1110 | ||
| 1111 | let owner_ref = _member_owner_handle(function) | |
| 1112 | ||
| 1113 | let signature = Emitter.SRM_SIGNATURE_ENCODER(emitter).method_signature(root) | |
| 1114 | ||
| 1115 | let reference = | |
| 1116 | emitter.add_named_member_reference( | |
| 1117 | owner_ref, | |
| 1118 | Emitter.SRM_FLAGS.method_name(root), | |
| 1119 | "method {function.owner}::{root.description}", | |
| 1120 | signature) | |
| 1121 | ||
| 1122 | if function.generic_arguments.count == 0 then | |
| 1123 | return cast System.Reflection.Metadata.EntityHandle(reference) | |
| 1124 | fi | |
| 1125 | ||
| 1126 | return cast System.Reflection.Metadata.EntityHandle( | |
| 1127 | emitter.add_method_specification( | |
| 1128 | cast System.Reflection.Metadata.EntityHandle(reference), | |
| 1129 | "{function}", | |
| 1130 | function.generic_arguments)) | |
| 1131 | si | |
| 1132 | si | |
| 1133 | si |