Resolution

This section contains definitions declared in the chpl::resolution namespace.

namespace chpl::resolution

Typedefs

using KindRequirement = llvm::Optional<chpl::types::QualifiedType::Kind>

An optional additional constraint on the kind of a type. Used in commonType to serve the case of functions that enforce param, type, or const returns.

using SubstitutionsMap = types::CompositeType::SubstitutionsMap

See the documentation for types::CompositeType::SubstitutionsMap.

using ScopeSet = llvm::SmallPtrSet<const Scope*, 5>
using NamedScopeSet = std::unordered_set<std::pair<UniqueString, const Scope*>>
using IdAndVis = std::pair<ID, uast::Decl::Visibility>
using DeclMap = std::unordered_map<UniqueString, OwnedIdsWithName>

A DeclMap has key = string name, and value = vector of ID of a NamedDecl Using an ID here prevents needing to recompute the Scope if (say) something in the body of a Function changed.

using LookupConfig = unsigned int

Enums

enum DefaultsPolicy

Values:

enumerator IGNORE_DEFAULTS

Do not use default values when determining field type.

enumerator USE_DEFAULTS

Use default values when determining field type.

enumerator USE_DEFAULTS_OTHER_FIELDS

Do not use default values for the current field (i.e. when set up for resolving a field statement), but do use default values for all other fields. This policy is useful when determining the genericity of individual fields.

enum VisibilityStmtKind

Values:

enumerator VIS_USE
enumerator VIS_IMPORT
enum [anonymous]

Values:

enumerator LOOKUP_DECLS
enumerator LOOKUP_IMPORT_AND_USE
enumerator LOOKUP_PARENTS
enumerator LOOKUP_TOPLEVEL
enumerator LOOKUP_INNERMOST
enumerator LOOKUP_SKIP_PRIVATE_VIS

Functions

template<typename ResolvedVisitorImpl>
static bool resolvedVisitorEnterFor(ResolvedVisitorImpl &v, const uast::For *loop)
template<typename ResolvedVisitorImpl>
static bool resolvedVisitorEnterAst(ResolvedVisitorImpl &v, const uast::AstNode *ast)
static inline CanPassResult canPass(Context *context, const types::QualifiedType &actualType, const types::QualifiedType &formalType)

Given an argument with QualifiedType actualType, can that argument be passed to a formal with QualifiedType formalType?

Note that a result with passes() and instantiates() indicates that the compiler should try instantiating. Once instantiation occurs, the compiler may figure out that the argument cannot be passed.

llvm::Optional<chpl::types::QualifiedType> commonType(Context *context, const std::vector<chpl::types::QualifiedType> &types, KindRequirement requiredKind = KindRequirement())

Given a (non-empty) list of types (e.g., the types of various return statements in a function), determine the type, if any, that can be used to represent all of them. Returns an llvm::Optional that contains the qualified type if one is found, or is empty otherwise.

If useRequiredKind=true is specified, the requiredKind argument is treated as a strict constraint on the kinds of the given types. For instance, specifying requiredKind=PARAM and giving non-param types will result in failure to find a common type, even if the types can otherwise by unified.

std::set<ID> computeElidedCopies(Context *context, const uast::AstNode *symbol, const ResolutionResultByPostorderID &byPostorder, const std::set<ID> &allSplitInitedVars)
MostSpecificCandidates findMostSpecificCandidates(Context *context, const std::vector<const TypedFnSignature*> &lst, const CallInfo &call, const Scope *callInScope, const PoiScope *callInPoiScope)

Given the result of filterCandidatesInstantiating, run overload resolution aka disambiguation to determine the most specific functions.

If a most specific function cannot be found due to ambiguity, returns an empty MostSpecificCandidates that also tracks the fact there was an ambiguity (so it can be differentiated from no candidates).

types::QualifiedType::Kind resolveIntent(const types::QualifiedType &t, bool isThis)

Resolve the intent of a formal argument based on its type and (possibly generic) intent. For example ‘const’ is a generic intent and it has different behavior depending on the type.

The argument ‘isThis’ indicates if the formal argument is the ‘this’ method receiver argument.

The generic and resolved intents are all represented as QualifiedType::Kind.

If the type is not known or only partially known, this function can return a generic intent.

const ResolutionResultByPostorderID &resolveModuleStmt(Context *context, ID id)

Resolve a module-level statement or variable declaration.

const ResolutionResultByPostorderID &resolveModule(Context *context, ID id)

Resolve the contents of a Module

const ResolutionResultByPostorderID &scopeResolveModule(Context *context, ID id)

Resolve the contents of a Module but don’t resolve any paren-ful function calls or establish types.

const types::QualifiedType &typeForModuleLevelSymbol(Context *context, ID id)

Compute the type for a NamedDecl with a particular id.

const types::QualifiedType &typeForBuiltin(Context *context, UniqueString name)

Compute the type for a Builtin type using just its name

types::QualifiedType typeForLiteral(Context *context, const uast::Literal *literal)

Compute the type for a literal

types::QualifiedType getInstantiationType(Context *context, types::QualifiedType actualType, types::QualifiedType formalType)

Returns the type that results when instantiating formalType, which must be generic, with actualType.

const TypedFnSignature *typedSignatureInitial(Context *context, const UntypedFnSignature *untypedSig)

Compute a TypedFnSignature from an UntypedFnSignature. (An UntypedFnSignature can be computed with UntypedFnSignature::get()). The TypedFnSignature will represent generic and potentially unknown types if the function is generic.

const types::Type *initialTypeForTypeDecl(Context *context, ID declId)

Returns a Type that represents the initial type provided by a TypeDecl (e.g. Class, Record, etc). This type does not store the fields.

const ResolvedFields &resolveFieldDecl(Context *context, const types::CompositeType *ct, ID fieldId, DefaultsPolicy defaultsPolicy)

Resolve a single field decl (which could be e.g. a MultiDecl) within a CompositeType.

The result will not have summary information computed. fieldsForTypeDecl should be used instead unless there is a reason that one-at-a-time resolution is important.

const ResolvedFields &fieldsForTypeDecl(Context *context, const types::CompositeType *ct, DefaultsPolicy defaultsPolicy)

Compute the types of the fields for a CompositeType (such as one returned by initialTypeForTypeDecl).

If useGenericFormalDefaults is true, a generic field like record R { type t = int; } will be assumed to have the default value (int in the above case). Otherwise, these fields will remain generic.

Even if useGenericFormalDefaults is set, the default value will be ignored if the field already has a substitution in the CompositeType.

The returned fields do not include any parent class fields.

bool isNameOfField(Context *context, UniqueString name, const types::Type *t)

Return true if ‘name’ is the name of a field for type ‘t’

const types::QualifiedType typeWithDefaults(Context *context, types::QualifiedType t)

Computes the version of a type assuming that defaults for generics are needed. So, for ‘record R { type t = int; }’, this will return R(int).

types::Type::Genericity getTypeGenericityIgnoring(Context *context, const types::Type *t, std::set<const types::Type*> &ignore)

Compute whether a type is generic or not. Considers the field of a record/class. For a UnknownType, returns MAYBE_GENERIC.

Considers types in the ignore set as concrete.

types::Type::Genericity getTypeGenericityIgnoring(Context *context, types::QualifiedType qt, std::set<const types::Type*> &ignore)

Compute whether a QualifiedType is generic or not. Considers the field of a record/class. For a UnknownType, returns MAYBE_GENERIC.

Considers types in the ignore set as concrete.

types::Type::Genericity getTypeGenericity(Context *context, const types::Type *t)

Compute whether a QualifiedType is generic or not. Considers the field of a record/class. For a UnknownType, returns MAYBE_GENERIC.

types::Type::Genericity getTypeGenericity(Context *context, types::QualifiedType qt)

Compute whether a QualifiedType is generic or not. Considers the field of a record/class. For a UnknownType, returns MAYBE_GENERIC.

const TypedFnSignature *typeConstructorInitial(Context *context, const types::Type *t)

Compute an initial TypedFnSignature for a type constructor for a particular type. If some fields of t are still generic, it will be necessary to call instantiateSignature on it.

const TypedFnSignature *instantiateSignature(Context *context, const TypedFnSignature *sig, const CallInfo &call, const PoiScope *poiScope)

Instantiate a TypedFnSignature from the result of typedSignatureInitial, a CallInfo describing the types at the call site, and a point-of-instantiation scope representing the POI scope of the call

Returns nullptr if the instantiation failed.

const ResolvedFunction *resolveFunction(Context *context, const TypedFnSignature *sig, const PoiScope *poiScope)

Compute a ResolvedFunction given a TypedFnSignature. Checks the generic cache for potential for reuse. When reuse occurs, the ResolvedFunction might point to a different TypedFnSignature.

const ResolvedFunction *resolveInitializer(Context *context, const TypedFnSignature *sig, const PoiScope *poiScope)

Compute a ResolvedFunction given a TypedFnSignature for an initializer. The difference between this and ‘resolveFunction’ is that it is possible for the type of the receiver to still be generic (as the initializer body must be resolved before the concrete type is known).

const ResolvedFunction *resolveConcreteFunction(Context *context, ID id)

Helper to resolve a concrete function using the above queries. Will return nullptr if the function is generic or has a where false.

const ResolvedFunction *scopeResolveFunction(Context *context, ID id)

Compute a ResolvedFunction given a TypedFnSignature, but don’t do full resolution of types or paren-ful calls in the body.

const ResolutionResultByPostorderID &scopeResolveAggregate(Context *context, ID id)
const ResolvedFunction *resolveOnlyCandidate(Context *context, const ResolvedExpression &r)

Returns the ResolvedFunction called by a particular ResolvedExpression, if there was exactly one candidate. Otherwise, it returns nullptr.

This function does not handle return intent overloading.

const types::QualifiedType &returnType(Context *context, const TypedFnSignature *sig, const PoiScope *poiScope)

Compute the return/yield type for a function.

TODO: If the function returns a param, the param’s value may not be available. This is because the function body is not resolved when the return type is explicitly declared. We probably still want to compute the value in such cases, though.

const std::vector<const TypedFnSignature*> &filterCandidatesInitial(Context *context, std::vector<BorrowedIdsWithName> lst, CallInfo call)

Compute the (potentially generic) TypedFnSignatures of possibly applicable candidate functions from a list of visible functions.

void filterCandidatesInstantiating(Context *context, const std::vector<const TypedFnSignature*> &lst, const CallInfo &call, const Scope *inScope, const PoiScope *inPoiScope, std::vector<const TypedFnSignature*> &result)

Further filter the result of filterCandidatesInitial down by doing instantiations. After this, all of the resulting TypedFnSignatures are actually candidates.

If instantiation occurs, gets/creates the new POI scope for inScope/inPoiScope.

CallResolutionResult resolveCall(Context *context, const uast::Call *call, const CallInfo &ci, const Scope *inScope, const PoiScope *inPoiScope)

Given a uast::Call, a CallInfo representing the call, a Scope representing the scope of that call, and a PoiScope representing the point-of-instantiation scope of that call, find the most specific candidates as well as the point-of-instantiation scopes that were used when resolving them.

CallResolutionResult resolveGeneratedCall(Context *context, const uast::AstNode *astForErr, const CallInfo &ci, const Scope *inScope, const PoiScope *inPoiScope)

Given a CallInfo representing a call, a Scope representing the scope of that call, and a PoiScope representing the point-of-instantiation scope of that call, find the most specific candidates as well as the point-of-instantiation scopes that were used when resolving them.

bool createsScope(uast::AstTag tag)

Returns true if this AST type can create a scope.

const Scope *scopeForId(Context *context, ID id)

Returns the Scope for an ID.

const Scope *scopeForModule(Context *context, ID moduleId)

Given an ID for a Module, returns a Scope that represents the Module scope (and what symbols are defined in it).

std::vector<BorrowedIdsWithName> lookupNameInScope(Context *context, const Scope *scope, const Scope *receiverScope, UniqueString name, LookupConfig config)

Find what a name might refer to.

‘scope’ is the context in which the name occurs (e.g. as an Identifier)

‘receiverScope’ is the scope of a type containing the name, in the case of method calls, field accesses, and resolving a name within a method. It is a Scope representing the record/class/union itself for the receiver. If provided, the receiverScope will be consulted before ‘scope’ and its parents.

The config argument is a group of or-ed together bit flags that adjusts the behavior of the lookup:

If LOOKUP_DECLS is set, looks for symbols declared in ‘scope’ and ‘receiverScope’. If LOOKUP_IMPORT_AND_USE is set, looks for symbols from use/import statements in this ‘scope’ and ‘receiverScope’. If LOOKUP_PARENTS is set, looks for symbols from parent scopes (but not parent modules of a module) including looking for declarations and handling imports, and including finding declarations in the root module. If LOOKUP_TOPLEVEL is set, checks for a toplevel module with this name. If LOOKUP_INNERMOST is true, limits search to the innermost scope with a match.

std::vector<BorrowedIdsWithName> lookupNameInScopeWithSet(Context *context, const Scope *scope, const Scope *receiverScope, UniqueString name, LookupConfig config, NamedScopeSet &visited)

Same as lookupNameInScope but includes a set tracking visited scopes.

bool isWholeScopeVisibleFromScope(Context *context, const Scope *checkScope, const Scope *fromScope)

Returns true if all of checkScope is visible from fromScope due to scope containment or whole-module use statements.

const PoiScope *pointOfInstantiationScope(Context *context, const Scope *scope, const PoiScope *parentPoiScope)

Returns a unique’d point-of-instantiation scope for the passed scope and parent POI scope. Collapses away POI scopes that do not affect visible functions.

const InnermostMatch &findInnermostDecl(Context *context, const Scope *scope, UniqueString name)

Given a name and a Scope, return the innermost and first ID for a definition of that name, and an indication of whether 0, 1, or more matches were found.

const std::vector<ID> findUsedImportedModules(Context *context, const Scope *scope)

Given a scope, returns a list of IDs for all the modules that were either used or imported in that scope. May return an empty vector if no modules were used or imported in the scope.

std::set<ID> computeSplitInits(Context *context, const uast::AstNode *symbol, const ResolutionResultByPostorderID &byPostorder)
class BorrowedIdsWithName
#include <scope-types.h>

Contains IDs with a particular name. This class is a lightweight reference to a collection stored in OwnedIdsWithName.

Public Functions

inline BorrowedIdsWithName(ID id, uast::Decl::Visibility vis)

Construct a BorrowedIdsWithName referring to one ID

inline int numIds() const

Return the number of IDs stored here

inline const ID &firstId() const

Returns the first ID in this list.

inline BorrowedIdsWithNameIter begin() const
inline BorrowedIdsWithNameIter end() const
inline bool operator==(const BorrowedIdsWithName &other) const
inline bool operator!=(const BorrowedIdsWithName &other) const
inline size_t hash() const
void stringify(std::ostream &ss, chpl::StringifyKind stringKind) const
class BorrowedIdsWithNameIter : public std::iterator<ID, std::forward_iterator_tag>
#include <scope-types.h>

Iterator that skips invisible entries from the list of borrowed IDs.

Public Functions

inline bool operator!=(const BorrowedIdsWithNameIter &other) const
inline BorrowedIdsWithNameIter &operator++()
inline const ID &operator*() const
class CallInfo
#include <resolution-types.h>

CallInfo

Public Types

using CallInfoActualIterable = Iterable<std::vector<CallInfoActual>>

Public Functions

inline CallInfo(UniqueString name, types::QualifiedType calledType, bool isMethodCall, bool hasQuestionArg, bool isParenless, std::vector<CallInfoActual> actuals)

Construct a CallInfo that contains QualifiedTypes for actuals

inline UniqueString name() const

return the name of the called thing

inline types::QualifiedType calledType() const

return the type of the called thing

inline bool isMethodCall() const

check if the call is a method call

inline bool isOpCall() const

check if the call is an operator call

inline bool hasQuestionArg() const

check if the call includes ? arg for type constructor

inline bool isParenless() const

return true if the call did not use parens

inline CallInfoActualIterable actuals() const

return the actuals

inline const CallInfoActual &actual(size_t i) const

return the i’th actual

inline size_t numActuals() const

return the number of actuals

inline bool operator==(const CallInfo &other) const
inline bool operator!=(const CallInfo &other) const
inline size_t hash() const
void stringify(std::ostream &ss, chpl::StringifyKind stringKind) const

Public Static Functions

static CallInfo createSimple(const uast::FnCall *call)

Construct a CallInfo with unknown types for the actuals that can be used for FormalActualMap but not much else. Assumes that the calledExpression is an identifier and that it is a function name (vs a method invocation).

static CallInfo create(Context *context, const uast::Call *call, const ResolutionResultByPostorderID &byPostorder, bool raiseErrors = true, std::vector<const uast::AstNode*> *actualAsts = nullptr)

Construct a CallInfo from a Call and optionally raise errors that occur when doing so. Assumes that the actual arguments have already been resolved and their types are available in ‘byPostorder’.

If ‘raiseErrors’ is ‘true’ (the default), then errors encountered will be raised on the current query.

If actualAsts is provided and not ‘nullptr’, it will be updated to contain the uAST pointers for each actual.

static void prepareActuals(Context *context, const uast::Call *call, const ResolutionResultByPostorderID &byPostorder, bool raiseErrors, std::vector<CallInfoActual> &actuals, const uast::AstNode *&questionArg, std::vector<const uast::AstNode*> *actualAsts)

Prepare actuals for a call for later use in creating a CallInfo. This is a helper function for CallInfo::create that is sometimes useful to call separately.

Sets ‘actuals’ and ‘hasQuesionArg’.

If actualIds is not ‘nullptr’, then the toID value of each actual is pushed to that array.

class CallInfoActual
#include <resolution-types.h>

CallInfoActual

Public Functions

inline CallInfoActual(types::QualifiedType type, UniqueString byName)
inline const types::QualifiedType &type() const

return the qualified type

inline UniqueString byName() const

return the name, if any, that the argument was passed with. Ex: in f(number=3), byName() would be “number”

inline bool operator==(const CallInfoActual &other) const
inline bool operator!=(const CallInfoActual &other) const
inline size_t hash() const
void stringify(std::ostream &ss, chpl::StringifyKind stringKind) const
class CallResolutionResult
#include <resolution-types.h>

CallResolutionResult

Public Functions

inline CallResolutionResult(types::QualifiedType exprType)
inline CallResolutionResult(MostSpecificCandidates mostSpecific, types::QualifiedType exprType, PoiInfo poiInfo)
inline const MostSpecificCandidates &mostSpecific() const

get the most specific candidates for return-intent overloading

inline const types::QualifiedType &exprType() const

type of the call expression

inline const PoiInfo &poiInfo() const

point-of-instantiation scopes used when resolving signature or body

inline bool operator==(const CallResolutionResult &other) const
inline bool operator!=(const CallResolutionResult &other) const
inline void swap(CallResolutionResult &other)
class CanPassResult

Public Types

enum ConversionKind

Values:

enumerator NONE

No implicit conversion is needed

enumerator PARAM_NARROWING

A narrowing param conversion is needed. These are only applicable to the particular param value e.g. 1:int converting to int(8) because 1 fits in int(8). The input of such a conversion must be param and the result is always a param.

enumerator NUMERIC

A numeric or bool conversion.

enumerator SUBTYPE

A conversion that implements subtyping

enumerator OTHER

Non-subtype conversion that doesn’t produce a param

Public Functions

inline CanPassResult()
~CanPassResult() = default
inline bool passes()

Returns true if the argument is passable

inline bool instantiates()

Returns true if passing the argument will require instantiation

inline bool promotes()

Returns true if passing the argument will require promotion

inline bool converts()

Returns true if implicit conversion is required

inline ConversionKind conversionKind()

What type of implicit conversion, if any, is needed?

inline bool convertsWithParamNarrowing()

Returns true if an implicit param narrowing conversion is required

Public Static Functions

static CanPassResult canPass(Context *context, const types::QualifiedType &actualType, const types::QualifiedType &formalType)
class FormalActual
#include <resolution-types.h>

FormalActual holds information on a function formal and its binding (if any)

Public Functions

inline const types::QualifiedType &formalType() const
inline const types::QualifiedType &actualType() const
inline const uast::Decl *formal() const
inline int formalIdx() const
inline int actualIdx() const
inline bool hasActual() const
inline bool formalInstantiated() const
inline bool hasDefault() const
inline bool isVarArgEntry() const
class FormalActualMap
#include <resolution-types.h>

FormalActualMap maps formals to actuals

Public Types

using FormalActualIterable = Iterable<std::vector<FormalActual>>

Public Functions

inline FormalActualMap(const UntypedFnSignature *sig, const CallInfo &call)
inline FormalActualMap(const TypedFnSignature *sig, const CallInfo &call)
inline bool isValid() const

check if mapping is valid

inline FormalActualIterable byFormals() const

get the FormalActuals in the order of the formal arguments

inline const FormalActual &byFormalIdx(int formalIdx) const

get the FormalActual for a particular formal index

inline const FormalActual *byActualIdx(int actualIdx) const

get the FormalActual for a particular actual index, and returns nullptr if none was found.

class InnermostMatch
#include <scope-types.h>

InnermostMatch

Public Types

enum MatchesFound

Values:

enumerator ZERO
enumerator ONE
enumerator MANY

Public Functions

inline InnermostMatch()
inline InnermostMatch(ID id, MatchesFound found)
inline ID id() const

Return the id

inline MatchesFound found() const

Return the matches found

inline bool operator==(const InnermostMatch &other) const
inline bool operator!=(const InnermostMatch &other) const
inline void swap(InnermostMatch &other)
inline void mark(Context *context) const
inline void stringify(std::ostream &ss, chpl::StringifyKind stringKind) const

Public Static Functions

static inline bool update(InnermostMatch &keep, InnermostMatch &addin)
class MostSpecificCandidates
#include <resolution-types.h>

Stores the most specific candidates when resolving a function call.

Public Types

enum Intent

Values:

enumerator ONLY
enumerator REF
enumerator CONST_REF
enumerator VALUE
enumerator NUM_INTENTS

Public Functions

inline MostSpecificCandidates()

Default-initialize MostSpecificCandidates with no candidates which is not empty due to ambiguity.

inline const TypedFnSignature *const *begin() const
inline const TypedFnSignature *const *end() const
inline void setBestRef(const TypedFnSignature *sig)
inline void setBestConstRef(const TypedFnSignature *sig)
inline void setBestValue(const TypedFnSignature *sig)
inline void setBestOnly(const TypedFnSignature *sig)
inline const TypedFnSignature *bestRef() const
inline const TypedFnSignature *bestConstRef() const
inline const TypedFnSignature *bestValue() const
inline const TypedFnSignature *only() const

If there is exactly one candidate, return that candidate. Otherwise, return nullptr.

inline int numBest() const

Returns the number of best candidates that are contained here.

inline bool isEmpty() const

Returns true if there are no most specific candidates.

inline bool isAmbiguous() const

Returns true if there are no most specific candidates due to ambiguity.

inline bool operator==(const MostSpecificCandidates &other) const
inline bool operator!=(const MostSpecificCandidates &other) const
inline void swap(MostSpecificCandidates &other)
inline void mark(Context *context) const

Public Static Functions

static inline MostSpecificCandidates getOnly(const TypedFnSignature *fn)

If fn is not nullptr, creates a MostSpecificCandidates with that function. Otherwise, default-initializes a MostSpecificCandidates with no candidates that is not empty due to ambiguity.

static inline MostSpecificCandidates getEmpty()

Creates a MostSpecificCandidates with no candidates that is not empty due to ambiguity.

static inline MostSpecificCandidates getAmbiguous()

Creates a MostSpecificCandidates that represents a no candidates but that is empty due to ambiguity.

static inline bool update(MostSpecificCandidates &keep, MostSpecificCandidates &addin)
template<typename UV>
class MutatingResolvedVisitor
#include <ResolvedVisitor.h>

Similar to ResolvedVisitor but this one works with a mutable ResolutionResultByPostorderID.

Public Functions

inline MutatingResolvedVisitor(Context *context, const uast::AstNode *ast, UV &userVisitor, ResolutionResultByPostorderID &byPostorder)
inline Context *context() const

Return the context used by this ResolvedVisitor

inline const uast::AstNode *ast() const

Return the uAST node being visited by this ResolvedVisitor

inline UV &userVisitor()

Return the user visitor that this ResolvedVisitor invokes

inline const UV &userVisitor() const

Return the user visitor that this ResolvedVisitor invokes

inline ResolutionResultByPostorderID &byPostorder() const

Return the current ResolutionResultByPostorderID which can be used to gather type information

inline bool hasAst(const uast::AstNode *ast) const

Returns if the ResolutionResultByPostorderID has a result for a particular uAST node

inline ResolvedExpression &byAst(const uast::AstNode *ast) const

Return the ResolvedExpression for a particular uAST node

inline bool hasId(const ID &id) const

Returns if the ResolutionResultByPostorderID has a result for a particular ID

inline ResolvedExpression &byId(const ID &id) const

Return the ResolvedExpression for a particular ID

inline bool enter(const uast::For *loop)
inline void exit(const uast::For *loop)
inline bool enter(const uast::AstNode *ast)
inline void exit(const uast::AstNode *ast)
class OwnedIdsWithName
#include <scope-types.h>

Collects IDs with a particular name. These can be referred to by a BorrowedIdsWithName in a way that avoids copies.

Public Functions

inline OwnedIdsWithName(ID id, uast::Decl::Visibility vis)

Construct an OwnedIdsWithName containing one ID.

inline void appendIdAndVis(ID id, uast::Decl::Visibility vis)

Append an ID to an OwnedIdsWithName.

inline bool operator==(const OwnedIdsWithName &other) const
inline bool operator!=(const OwnedIdsWithName &other) const
inline void mark(Context *context) const
void stringify(std::ostream &ss, chpl::StringifyKind stringKind) const
llvm::Optional<BorrowedIdsWithName> borrow(bool arePrivateIdsIgnored) const
class PoiInfo
#include <resolution-types.h>

Contains information about symbols available from point-of-instantiation in order to implement caching of instantiations.

Public Functions

inline PoiInfo()
inline PoiInfo(const PoiScope *poiScope)
inline PoiInfo(std::set<std::pair<ID, ID>> poiFnIdsUsed)
inline const PoiScope *poiScope() const

return the poiScope

inline void setPoiScope(const PoiScope *poiScope)

set the poiScope

inline void setResolved(bool resolved)

set resolved

inline const std::set<std::pair<ID, ID>> &poiFnIdsUsed() const
inline void addIds(ID a, ID b)
inline void swap(PoiInfo &other)
void accumulate(const PoiInfo &addPoiInfo)
bool canReuse(const PoiInfo &check) const
inline size_t hash() const
inline bool operator==(const PoiInfo &other) const
inline bool operator!=(const PoiInfo &other) const
inline void mark(Context *context) const
inline void stringify(std::ostream &ss, chpl::StringifyKind stringKind) const

Public Static Functions

static inline bool updateEquals(const PoiInfo &a, const PoiInfo &b)
static inline bool reuseEquals(const PoiInfo &a, const PoiInfo &b)
class PoiScope
#include <scope-types.h>

PoiScope is a point-of-instantiation scope

Public Functions

inline PoiScope(const Scope *scope, const PoiScope *poiScope)
inline const Scope *inScope() const

return the parent scope for the call

inline const PoiScope *inFnPoi() const

return the POI of this POI

inline bool operator==(const PoiScope &other) const
inline bool operator!=(const PoiScope &other) const
inline void mark(Context *context) const
inline void stringify(std::ostream &ss, chpl::StringifyKind stringKind) const

Public Static Functions

static inline bool update(owned<PoiScope> &keep, owned<PoiScope> &addin)
class ResolutionResultByPostorderID
#include <resolution-types.h>

This type is a mapping from postOrderId (which is an integer) to ResolvedExpression for storing resolution results within a symbol.

Note that an inner Function would not be covered here.

Public Functions

void setupForSymbol(const uast::AstNode *ast)

prepare to resolve the contents of the passed symbol

void setupForSignature(const uast::Function *func)

prepare to resolve the signature of the passed function

void setupForFunction(const uast::Function *func)

prepare to resolve the body of the passed function

void setupForParamLoop(const uast::For *loop, ResolutionResultByPostorderID &parent)

prepare to resolve the body of a For loop

inline ResolvedExpression &byIdExpanding(const ID &id)
inline ResolvedExpression &byAstExpanding(const uast::AstNode *ast)
inline bool hasId(const ID &id) const
inline bool hasAst(const uast::AstNode *ast) const
inline ResolvedExpression &byId(const ID &id)
inline const ResolvedExpression &byId(const ID &id) const
inline ResolvedExpression &byAst(const uast::AstNode *ast)
inline const ResolvedExpression &byAst(const uast::AstNode *ast) const
inline ResolvedExpression *byIdOrNull(const ID &id)
inline const ResolvedExpression *byIdOrNull(const ID &id) const
inline ResolvedExpression *byAstOrNull(const uast::AstNode *ast)
inline const ResolvedExpression *byAstOrNull(const uast::AstNode *ast) const
inline bool operator==(const ResolutionResultByPostorderID &other) const
inline bool operator!=(const ResolutionResultByPostorderID &other) const
inline void swap(ResolutionResultByPostorderID &other)
inline void mark(Context *context) const

Public Static Functions

static bool update(ResolutionResultByPostorderID &keep, ResolutionResultByPostorderID &addin)
class ResolvedExpression
#include <resolution-types.h>

This type represents a resolved expression.

Public Types

using AssociatedFns = std::vector<const TypedFnSignature*>

Public Functions

inline ResolvedExpression()
inline const types::QualifiedType &type() const

get the qualified type

inline ID toId() const

for simple (non-function Identifier) cases, the ID of a NamedDecl it refers to

inline const MostSpecificCandidates &mostSpecific() const

For a function call, what is the most specific candidate, or when using return intent overloading, what are the most specific candidates? The choice between these needs to happen later than the main function resolution.

inline const PoiScope *poiScope() const
inline const AssociatedFns &associatedFns() const
inline const ResolvedParamLoop *paramLoop() const
inline void setToId(ID toId)

set the toId

inline void setType(const types::QualifiedType &type)

set the type

inline void setMostSpecific(const MostSpecificCandidates &mostSpecific)

set the most specific

inline void setPoiScope(const PoiScope *poiScope)

set the point-of-instantiation scope

inline void addAssociatedFn(const TypedFnSignature *fn)

add an associated function

inline void setParamLoop(const ResolvedParamLoop *paramLoop)
inline bool operator==(const ResolvedExpression &other) const
inline bool operator!=(const ResolvedExpression &other) const
inline void swap(ResolvedExpression &other)
inline void mark(Context *context) const
void stringify(std::ostream &ss, chpl::StringifyKind stringKind) const

Public Static Functions

static inline bool update(ResolvedExpression &keep, ResolvedExpression &addin)
class ResolvedFields
#include <resolution-types.h>

ResolvedFields represents the fully resolved fields for a class/record/union/tuple type.

Public Functions

inline ResolvedFields()
inline void setType(const types::CompositeType *type)
inline void addField(UniqueString name, bool hasDefaultValue, ID declId, types::QualifiedType type)
void finalizeFields(Context *context)
inline bool isGeneric() const

Returns true if this is a generic type

inline bool isGenericWithDefaults() const

Returns true if this is a generic type where all generic fields have default values. For classes, this does not include consideration of the parent class.

inline int numFields() const
inline UniqueString fieldName(int i) const
inline bool fieldHasDefaultValue(int i) const
inline ID fieldDeclId(int i) const
inline types::QualifiedType fieldType(int i) const
inline bool operator==(const ResolvedFields &other) const
inline bool operator!=(const ResolvedFields &other) const
inline void swap(ResolvedFields &other)
inline void mark(Context *context) const

Public Static Functions

static inline bool update(ResolvedFields &keep, ResolvedFields &addin)
class ResolvedFunction
#include <resolution-types.h>

This type represents a resolved function.

Public Functions

inline ResolvedFunction(const TypedFnSignature *signature, uast::Function::ReturnIntent returnIntent, ResolutionResultByPostorderID resolutionById, PoiInfo poiInfo)
inline const TypedFnSignature *signature() const

The type signature

inline uast::Function::ReturnIntent returnIntent() const

the return intent

inline const ResolutionResultByPostorderID &resolutionById() const

this is the output of the resolution process

inline const PoiInfo &poiInfo() const

the set of point-of-instantiations used by the instantiation

inline bool operator==(const ResolvedFunction &other) const
inline bool operator!=(const ResolvedFunction &other) const
inline void swap(ResolvedFunction &other)
inline void mark(Context *context) const
inline const ResolvedExpression &byId(const ID &id) const
inline const ResolvedExpression &byAst(const uast::AstNode *ast) const
inline const ID &id() const

Public Static Functions

static inline bool update(owned<ResolvedFunction> &keep, owned<ResolvedFunction> &addin)
class ResolvedParamLoop

Public Types

using LoopBodies = std::vector<ResolutionResultByPostorderID>

Public Functions

inline ResolvedParamLoop(const uast::For *loop)
inline const uast::For *loop() const
inline const LoopBodies &loopBodies() const
inline void setLoopBodies(const LoopBodies &loopBodies)
inline void mark(Context *context) const
inline bool operator==(const ResolvedParamLoop &other) const
inline bool operator!=(const ResolvedParamLoop &other) const
inline void swap(ResolvedParamLoop &other)

Public Static Functions

static inline bool update(ResolvedParamLoop &keep, ResolvedParamLoop &addin)
class ResolvedVisibilityScope
#include <scope-types.h>

Stores the result of in-order resolution of use/import statements.

Public Types

using VisibilitySymbolsIterable = Iterable<std::vector<VisibilitySymbols>>

Public Functions

inline ResolvedVisibilityScope(const Scope *scope)
inline const Scope *scope() const

Return the scope

inline VisibilitySymbolsIterable visibilityClauses() const

Return an iterator over the visibility clauses

inline void addVisibilityClause(const Scope *scope, VisibilitySymbols::Kind kind, bool isPrivate, std::vector<std::pair<UniqueString, UniqueString>> n)

Add a visibility clause

inline bool operator==(const ResolvedVisibilityScope &other) const
inline bool operator!=(const ResolvedVisibilityScope &other) const
inline void mark(Context *context) const

Public Static Functions

static inline bool update(owned<ResolvedVisibilityScope> &keep, owned<ResolvedVisibilityScope> &addin)
template<typename UV>
class ResolvedVisitor
#include <ResolvedVisitor.h>

This class enables visiting resolved uAST nodes. It is a kind of adapter that converts untyped visiting (traversing uAST nodes with a ResolvedVisitor) to typed visiting (traversing uAST nodes with the provided User Visitor (UV)).

The enter/exit calls invoke enter/exit on the User Visitor while passing in a reference to the current ResolvedVisitor. It is possible to get the type of a uAST node from the current ResolvedVisitor.

Public Functions

inline ResolvedVisitor(Context *context, const uast::AstNode *ast, UV &userVisitor, const ResolutionResultByPostorderID &byPostorder)
inline Context *context() const

Return the context used by this ResolvedVisitor

inline const uast::AstNode *ast() const

Return the uAST node being visited by this ResolvedVisitor

inline UV &userVisitor()

Return the user visitor that this ResolvedVisitor invokes

inline const UV &userVisitor() const

Return the user visitor that this ResolvedVisitor invokes

inline const ResolutionResultByPostorderID &byPostorder() const

Return the current ResolutionResultByPostorderID which can be used to gather type information

inline bool hasAst(const uast::AstNode *ast) const

Returns if the ResolutionResultByPostorderID has a result for a particular uAST node

inline const ResolvedExpression &byAst(const uast::AstNode *ast) const

Return the ResolvedExpression for a particular uAST node

inline bool hasId(const ID &id) const

Returns if the ResolutionResultByPostorderID has a result for a particular ID

inline const ResolvedExpression &byId(const ID &id) const

Return the ResolvedExpression for a particular ID

inline bool enter(const uast::For *loop)
inline void exit(const uast::For *loop)
inline bool enter(const uast::AstNode *ast)
inline void exit(const uast::AstNode *ast)
class Scope
#include <scope-types.h>

A scope roughly corresponds to a { } block. Anywhere a new symbol could be defined / is defined is a scope.

The scope contains a mapping from name to ID for symbols defined within. For the root scope, it can also contain empty IDs for builtin types and symbols.

While generic instantiations generate something scope-like, the point-of-instantiation reasoning will need to be handled with a different type.

Public Functions

inline Scope()

Construct an empty scope. This scope will not yet store any defined symbols.

Scope(const uast::AstNode *ast, const Scope *parentScope, bool autoUsesModules)

Construct a Scope for a particular AST node and with a particular parent.

void addBuiltin(UniqueString name)

Add a builtin type with the provided name. This needs to be called to populate the root scope with builtins.

inline const Scope *parentScope() const

Return the parent scope for this scope.

const Scope *moduleScope() const

Return the module scope containing this scope, or if it is a module scope, this scope.

const Scope *parentModuleScope() const

Return the parent module of the module containing this scope. This is equivalent to:

‘scope->moduleScope()->parentScope()->moduleScope()

inline uast::asttags::AstTag tag() const

Returns the AST tag of the construct that this Scope represents.

inline const ID &id() const

Return the ID of the Block or other AST node construct that this Scope represents. An empty ID indicates that this Scope is the root scope.

inline UniqueString name() const
inline bool containsUseImport() const

Returns ‘true’ if this Scope directly contains use or import statements including the automatic ‘use’ for the standard library.

inline bool autoUsesModules() const

Returns ‘true’ if the Scope includes the automatic ‘use’ for the standard library.

inline bool containsFunctionDecls() const

Returns ‘true’ if this Scope directly contains any Functions

inline int numDeclared() const
inline bool lookupInScope(UniqueString name, std::vector<BorrowedIdsWithName> &result, bool arePrivateIdsIgnored) const

If the scope contains IDs with the provided name, append the relevant BorrowedIdsToName the the vector. Returns true if something was appended.

inline bool operator==(const Scope &other) const
inline bool operator!=(const Scope &other) const
inline void mark(Context *context) const
inline void stringify(std::ostream &ss, chpl::StringifyKind stringKind) const

Public Static Functions

static inline bool update(owned<Scope> &keep, owned<Scope> &addin)
class TypedFnSignature
#include <resolution-types.h>

This represents a typed function signature.

Public Types

enum WhereClauseResult

Values:

enumerator WHERE_NONE
enumerator WHERE_TBD
enumerator WHERE_TRUE
enumerator WHERE_FALSE

Public Functions

inline bool operator==(const TypedFnSignature &other) const
inline bool operator!=(const TypedFnSignature &other) const
inline void mark(Context *context) const
void stringify(std::ostream &ss, chpl::StringifyKind stringKind) const
inline const ID &id() const

Returns the id of the relevant uast node (usually a Function but it can be a Record or Class for compiler-generated functions)

inline const UntypedFnSignature *untyped() const

Returns the UntypedFnSignature

inline WhereClauseResult whereClauseResult() const

Returns the result of evaluating the where clause

inline bool needsInstantiation() const

Returns if any of the formals are generic or unknown

inline const TypedFnSignature *instantiatedFrom() const

Is this TypedFnSignature representing an instantiation? If so, returns the generic TypedFnSignature that was instantiated. Otherwise, returns nullptr.

This function always returns the signature for the fully generic function and never a partial instantiation. That is, the result will either be nullptr or result->instantiatedFrom() will be nullptr.

inline bool formalIsInstantiated(int i) const

Returns ‘true’ if formal argument i was instantiated; that is, it was present in the SubstitutionsMap when instantiating.

inline const TypedFnSignature *parentFn() const

Is this for an inner Function? If so, what is the parent function signature?

inline int numFormals() const

Returns the number of formals

inline UniqueString formalName(int i) const

Returns the name of the i’th formal

inline const types::QualifiedType &formalType(int i) const

Returns the type of the i’th formal

Public Static Functions

static const TypedFnSignature *get(Context *context, const UntypedFnSignature *untypedSignature, std::vector<types::QualifiedType> formalTypes, TypedFnSignature::WhereClauseResult whereClauseResult, bool needsInstantiation, const TypedFnSignature *instantiatedFrom, const TypedFnSignature *parentFn, Bitmap formalsInstantiated)

Get the unique TypedFnSignature containing these components

static inline bool update(owned<TypedFnSignature> &keep, owned<TypedFnSignature> &addin)
class UntypedFnSignature
#include <resolution-types.h>

An untyped function signature. This is really just the part of a function including the formals. It exists so that the process of identifying candidates does not need to depend on the bodies of the function (in terms of incremental recomputation).

For type constructors for generic types, the formal decls are actually field decls.

Public Functions

inline bool operator==(const UntypedFnSignature &other) const
inline bool operator!=(const UntypedFnSignature &other) const
inline void mark(Context *context) const
inline const ID &id() const

Returns the id of the relevant uast node (usually a Function but it can be a Record or Class for compiler-generated functions)

inline UniqueString name() const

Returns the name of the function this signature represents

inline uast::Function::Kind kind() const

Returns the kind of the function this signature represents

inline bool isCompilerGenerated() const

Returns true if this compiler generated

inline bool idIsFunction() const

Returns true if id() refers to a Function

inline bool idIsClass() const

Returns true if id() refers to a Class

inline bool idIsRecord() const

Returns true if id() refers to a Record

inline bool idIsUnion() const

Returns true if id() refers to a Union

inline bool idIsField() const

Returns true if id() refers to a Variable (for a field)

inline bool isTypeConstructor() const

Returns true if this is a type constructor

inline bool isMethod() const

Returns true if this is a method

inline int numFormals() const

Returns the number of formals

inline UniqueString formalName(int i) const

Returns the name of the i’th formal.

inline bool formalHasDefault(int i) const

Return whether the i’th formal has a default value.

inline const uast::Decl *formalDecl(int i) const

Returns the Decl for the i’th formal / field. This will return nullptr for compiler-generated functions.

inline bool formalIsVarArgs(int i) const
inline void stringify(std::ostream &ss, chpl::StringifyKind stringKind) const

Public Static Functions

static const UntypedFnSignature *get(Context *context, ID id, UniqueString name, bool isMethod, bool isTypeConstructor, bool isCompilerGenerated, uast::asttags::AstTag idTag, uast::Function::Kind kind, std::vector<FormalDetail> formals, const uast::AstNode *whereClause)

Get the unique UntypedFnSignature containing these components

static const UntypedFnSignature *get(Context *context, const uast::Function *function)

Get the unique UntypedFnSignature representing a Function’s signature from a Function uAST pointer.

static const UntypedFnSignature *get(Context *context, ID functionId)

Get the unique UntypedFnSignature representing a Function’s signature from a Function ID.

static inline bool update(owned<UntypedFnSignature> &keep, owned<UntypedFnSignature> &addin)
struct FormalDetail

Public Functions

inline FormalDetail(UniqueString name, bool hasDefaultValue, const uast::Decl *decl, bool isVarArgs = false)
inline bool operator==(const FormalDetail &other) const
inline bool operator!=(const FormalDetail &other) const
inline size_t hash() const
inline void stringify(std::ostream &ss, chpl::StringifyKind stringKind) const

Public Members

UniqueString name
bool hasDefaultValue = false
const uast::Decl *decl = nullptr
bool isVarArgs = false
class VisibilitySymbols
#include <scope-types.h>

This class supports both use and import. It stores a normalized form of the symbols made available by a use/import clause.

Public Types

enum Kind

The kind of import symbol

Values:

enumerator SYMBOL_ONLY

the scope itself only, e.g.:

import Bar as Baz;

The names field will contain one pair, denoting the renaming of the module itself.

enumerator ALL_CONTENTS

all the contents of the scope, e.g.:

import Foo;

The names field will be empty.

enumerator ONLY_CONTENTS

only the contents of the scope named in names, e.g.:

import Foo.{a as x,b};

The names field will contain the imported names.

enumerator CONTENTS_EXCEPT

contents of the scope except listed names, e.g.:

use Foo except {a, b};

The names field will contain the excluded names. There is no renaming in this case.

Public Functions

inline VisibilitySymbols()
inline VisibilitySymbols(const Scope *scope, Kind kind, bool isPrivate, std::vector<std::pair<UniqueString, UniqueString>> names)
inline const Scope *scope() const

Return the imported scope

inline Kind kind() const

Return the kind of the imported symbol

inline bool isPrivate() const

Return whether or not the imported symbol is private

inline bool lookupName(const UniqueString &name, UniqueString &declared) const

Lookup the declared name for a given name Returns true if name is found in the list of renamed names and stores the declared name in declared Returns false if name is not found

inline bool operator==(const VisibilitySymbols &other) const
inline bool operator!=(const VisibilitySymbols &other) const
inline void swap(VisibilitySymbols &other)
inline void mark(Context *context) const

Public Static Functions

static inline bool update(VisibilitySymbols &keep, VisibilitySymbols &addin)