types

code owner: Arne Döring e-mail: [email protected] included from types.nim

Imports

ast, astalgo, trees, msgs, platform, renderer, options, lineinfos, int128

Types

TPreferedDesc = enum
  preferName, preferDesc, preferExported, preferModuleInfo, preferGenericArg,
  preferTypeName, preferResolved, preferMixed

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TTypeIter = proc (t: PType; closure: RootRef): bool {...}{.nimcall.}

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TTypeMutator = proc (t: PType; closure: RootRef): PType {...}{.nimcall.}

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TTypePredicate = proc (t: PType): bool {...}{.nimcall.}

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TParamsEquality = enum
  paramsNotEqual, paramsEqual, paramsIncompatible

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TTypeFieldResult = enum
  frNone, frHeader, frEmbedded

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TDistinctCompare = enum
  dcEq,                     ## a and b should be the same type
  dcEqIgnoreDistinct,       ## compare symmetrically: (distinct a) == b, a == b
                             ## or a == (distinct b)
  dcEqOrDistinctOf           ## a equals b or a is distinct of b

how distinct types are to be compared Source Edit

TTypeCmpFlag = enum
  IgnoreTupleFields,        ## NOTE: Only set this flag for backends!
  IgnoreCC, ExactTypeDescValues, ExactGenericParams, ExactConstraints,
  ExactGcSafety, AllowCommonBase

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TTypeCmpFlags = set[TTypeCmpFlag]

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EffectsCompat = enum
  efCompat, efRaisesDiffer, efRaisesUnknown, efTagsDiffer, efTagsUnknown,
  efLockLevelsDiffer

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OrdinalType = enum
  NoneLike, IntLike, FloatLike

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Consts

abstractPtrs = {tyVar, tyPtr, tyRef, tyGenericInst, tyDistinct, tyOrdinal,
                tyTypeDesc, tyAlias, tyInferred, tySink, tyLent, tyOwned}

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abstractVar = {tyVar, tyGenericInst, tyDistinct, tyOrdinal, tyTypeDesc, tyAlias,
               tyInferred, tySink, tyLent, tyOwned}

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abstractRange = {tyGenericInst, tyRange, tyDistinct, tyOrdinal, tyTypeDesc,
                 tyAlias, tyInferred, tySink, tyOwned}

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abstractInst = {tyGenericInst, tyDistinct, tyOrdinal, tyTypeDesc, tyAlias,
                tyInferred, tySink, tyOwned}

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abstractInstOwned = {tyAlias, tyTypeDesc, tyGenericInst, tyDistinct, tyOrdinal,
                     tyOwned..tySink, tyInferred}

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skipPtrs = {tyVar, tyPtr, tyRef, tyGenericInst, tyTypeDesc, tyAlias, tyInferred,
            tySink, tyLent, tyOwned}

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typedescPtrs = {tyAlias, tyTypeDesc, tyGenericInst, tyDistinct, tyOrdinal,
                tyPtr..tyVar, tyOwned..tyLent, tyInferred}

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typedescInst = {tyAlias, tyTypeDesc, tyGenericInst, tyDistinct, tyOrdinal,
                tyOwned..tySink, tyUserTypeClass, tyInferred}

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szUnknownSize = -3

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szIllegalRecursion = -2

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szUncomputedSize = -1

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szTooBigSize = -4

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Procs

proc base(t: PType): PType {...}{.raises: [], tags: [].}

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proc invalidGenericInst(f: PType): bool {...}{.raises: [], tags: [].}

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proc isPureObject(typ: PType): bool {...}{.raises: [], tags: [].}

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proc isUnsigned(t: PType): bool {...}{.raises: [], tags: [].}

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proc getOrdValue(n: PNode; onError = high(Int128)): Int128 {...}{.raises: [],
    tags: [].}

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proc getFloatValue(n: PNode): BiggestFloat {...}{.raises: [], tags: [].}

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proc isIntLit(t: PType): bool {...}{.inline, raises: [], tags: [].}

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proc isFloatLit(t: PType): bool {...}{.inline, raises: [], tags: [].}

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proc addTypeHeader(result: var string; conf: ConfigRef; typ: PType;
                   prefer: TPreferedDesc = preferMixed;
                   getDeclarationPath = true) {...}{.raises: [Exception],
    tags: [RootEffect].}

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proc getProcHeader(conf: ConfigRef; sym: PSym;
                   prefer: TPreferedDesc = preferName; getDeclarationPath = true): string {...}{.
    raises: [Exception], tags: [RootEffect].}

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proc elemType(t: PType): PType {...}{.raises: [], tags: [].}

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proc enumHasHoles(t: PType): bool {...}{.raises: [], tags: [].}

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proc isOrdinalType(t: PType; allowEnumWithHoles: bool = false): bool {...}{.
    raises: [], tags: [].}

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proc iterOverType(t: PType; iter: TTypeIter; closure: RootRef): bool {...}{.
    raises: [Exception], tags: [RootEffect].}

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proc searchTypeFor(t: PType; predicate: TTypePredicate): bool {...}{.
    raises: [Exception], tags: [RootEffect].}

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proc containsObject(t: PType): bool {...}{.raises: [Exception], tags: [RootEffect].}

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proc analyseObjectWithTypeField(t: PType): TTypeFieldResult {...}{.
    raises: [Exception], tags: [RootEffect].}

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proc containsGarbageCollectedRef(typ: PType): bool {...}{.raises: [Exception],
    tags: [RootEffect].}

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proc containsManagedMemory(typ: PType): bool {...}{.raises: [Exception],
    tags: [RootEffect].}

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proc containsTyRef(typ: PType): bool {...}{.raises: [Exception], tags: [RootEffect].}

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proc containsHiddenPointer(typ: PType): bool {...}{.raises: [Exception],
    tags: [RootEffect].}

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proc isFinal(t: PType): bool {...}{.raises: [], tags: [].}

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proc canFormAcycle(typ: PType): bool {...}{.raises: [Exception], tags: [RootEffect].}

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proc mutateType(t: PType; iter: TTypeMutator; closure: RootRef): PType {...}{.
    raises: [Exception], tags: [RootEffect].}

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proc typeToString(typ: PType; prefer: TPreferedDesc = preferName): string {...}{.
    raises: [Exception, ValueError], tags: [RootEffect].}

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proc firstOrd(conf: ConfigRef; t: PType): Int128 {...}{.
    raises: [Exception, ValueError, IOError, ERecoverableError],
    tags: [RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect].}

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proc firstFloat(t: PType): BiggestFloat {...}{.
    raises: [Exception, ValueError, IOError, ERecoverableError],
    tags: [RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect].}

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proc lastOrd(conf: ConfigRef; t: PType): Int128 {...}{.
    raises: [Exception, ValueError, IOError, ERecoverableError],
    tags: [RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect].}

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proc lastFloat(t: PType): BiggestFloat {...}{.
    raises: [Exception, ValueError, IOError, ERecoverableError],
    tags: [RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect].}

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proc floatRangeCheck(x: BiggestFloat; t: PType): bool {...}{.
    raises: [Exception, ValueError, IOError, ERecoverableError],
    tags: [RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect].}

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proc lengthOrd(conf: ConfigRef; t: PType): Int128 {...}{.
    raises: [Exception, ValueError, IOError, ERecoverableError],
    tags: [RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect].}

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proc sameType(a, b: PType; flags: TTypeCmpFlags = {}): bool {...}{.
    raises: [Exception], tags: [RootEffect].}

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proc sameTypeOrNil(a, b: PType; flags: TTypeCmpFlags = {}): bool {...}{.
    raises: [Exception], tags: [RootEffect].}

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proc equalParams(a, b: PNode): TParamsEquality {...}{.raises: [Exception],
    tags: [RootEffect].}

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proc sameObjectTypes(a, b: PType): bool {...}{.raises: [Exception],
    tags: [RootEffect].}

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proc sameDistinctTypes(a, b: PType): bool {...}{.inline, raises: [Exception],
    tags: [RootEffect].}

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proc sameEnumTypes(a, b: PType): bool {...}{.inline, raises: [], tags: [].}

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proc isGenericAlias(t: PType): bool {...}{.raises: [], tags: [].}

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proc skipGenericAlias(t: PType): PType {...}{.raises: [], tags: [].}

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proc sameFlags(a, b: PType): bool {...}{.inline, raises: [], tags: [].}

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proc sameBackendType(x, y: PType): bool {...}{.
    raises: [Exception, ERecoverableError], tags: [RootEffect].}

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proc compareTypes(x, y: PType; cmp: TDistinctCompare = dcEq;
                  flags: TTypeCmpFlags = {}): bool {...}{.
    raises: [Exception, ERecoverableError], tags: [RootEffect].}

compares two type for equality (modulo type distinction) Source Edit

proc inheritanceDiff(a, b: PType): int {...}{.raises: [Exception], tags: [RootEffect].}

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proc commonSuperclass(a, b: PType): PType {...}{.raises: [Exception],
    tags: [RootEffect].}

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proc matchType(a: PType; pattern: openArray[tuple[k: TTypeKind, i: int]];
               last: TTypeKind): bool {...}{.raises: [], tags: [].}

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proc computeSize(conf: ConfigRef; typ: PType): BiggestInt {...}{.
    raises: [Exception, ValueError, IOError, ERecoverableError],
    tags: [RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect].}

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proc getReturnType(s: PSym): PType {...}{.raises: [], tags: [].}

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proc getAlign(conf: ConfigRef; typ: PType): BiggestInt {...}{.
    raises: [Exception, ValueError, IOError, ERecoverableError],
    tags: [RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect].}

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proc getSize(conf: ConfigRef; typ: PType): BiggestInt {...}{.
    raises: [Exception, ValueError, IOError, ERecoverableError],
    tags: [RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect].}

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proc containsGenericType(t: PType): bool {...}{.raises: [Exception],
    tags: [RootEffect].}

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proc baseOfDistinct(t: PType): PType {...}{.raises: [], tags: [].}

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proc safeInheritanceDiff(a, b: PType): int {...}{.raises: [Exception],
    tags: [RootEffect].}

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proc compatibleEffects(formal, actual: PType): EffectsCompat {...}{.
    raises: [Exception], tags: [RootEffect].}

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proc isCompileTimeOnly(t: PType): bool {...}{.inline, raises: [], tags: [].}

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proc containsCompileTimeOnly(t: PType): bool {...}{.raises: [], tags: [].}

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proc safeSkipTypes(t: PType; kinds: TTypeKinds): PType {...}{.raises: [], tags: [].}

same as 'skipTypes' but with a simple cycle detector. Source Edit

proc classify(t: PType): OrdinalType {...}{.raises: [], tags: [].}

for convenient type checking: Source Edit

proc skipConv(n: PNode): PNode {...}{.raises: [], tags: [].}

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proc skipHidden(n: PNode): PNode {...}{.raises: [], tags: [].}

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proc skipConvTakeType(n: PNode): PNode {...}{.raises: [], tags: [].}

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proc isEmptyContainer(t: PType): bool {...}{.raises: [], tags: [].}

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proc takeType(formal, arg: PType): PType {...}{.raises: [], tags: [].}

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proc skipHiddenSubConv(n: PNode): PNode {...}{.raises: [], tags: [].}

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proc typeMismatch(conf: ConfigRef; info: TLineInfo; formal, actual: PType) {...}{.
    raises: [Exception, ValueError, IOError, ERecoverableError],
    tags: [RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect].}

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proc isTupleRecursive(t: PType): bool {...}{.raises: [], tags: [].}

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proc isException(t: PType): bool {...}{.raises: [], tags: [].}

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proc isDefectException(t: PType): bool {...}{.raises: [], tags: [].}

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proc isSinkTypeForParam(t: PType): bool {...}{.raises: [], tags: [].}

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Templates

template `$`(typ: PType): string

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template bindConcreteTypeToUserTypeClass(tc, concrete: PType)

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template isResolvedUserTypeClass(t: PType): bool

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template foldSizeOf(conf: ConfigRef; n: PNode; fallback: PNode): PNode

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template foldAlignOf(conf: ConfigRef; n: PNode; fallback: PNode): PNode

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template foldOffsetOf(conf: ConfigRef; n: PNode; fallback: PNode): PNode

Returns an int literal node of the given offsetof expression in n. Falls back to fallback, if the offsetof expression can't be processed. Source Edit