//===-- lib/Semantics/check-call.cpp --------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "check-call.h"
#include "definable.h"
#include "pointer-assignment.h"
#include "flang/Evaluate/characteristics.h"
#include "flang/Evaluate/check-expression.h"
#include "flang/Evaluate/fold-designator.h"
#include "flang/Evaluate/shape.h"
#include "flang/Evaluate/tools.h"
#include "flang/Parser/characters.h"
#include "flang/Parser/message.h"
#include "flang/Semantics/scope.h"
#include "flang/Semantics/tools.h"
#include <map>
#include <string>
using namespace Fortran::parser::literals;
namespace characteristics = Fortran::evaluate::characteristics;
namespace Fortran::semantics {
static void CheckImplicitInterfaceArg(evaluate::ActualArgument &arg,
parser::ContextualMessages &messages, SemanticsContext &context) {
auto restorer{
messages.SetLocation(arg.sourceLocation().value_or(messages.at()))};
if (auto kw{arg.keyword()}) {
messages.Say(*kw,
"Keyword '%s=' may not appear in a reference to a procedure with an implicit interface"_err_en_US,
*kw);
}
auto type{arg.GetType()};
if (type) {
if (type->IsAssumedType()) {
messages.Say(
"Assumed type actual argument requires an explicit interface"_err_en_US);
} else if (type->IsUnlimitedPolymorphic()) {
messages.Say(
"Unlimited polymorphic actual argument requires an explicit interface"_err_en_US);
} else if (const DerivedTypeSpec * derived{GetDerivedTypeSpec(type)}) {
if (!derived->parameters().empty()) {
messages.Say(
"Parameterized derived type actual argument requires an explicit interface"_err_en_US);
}
}
}
if (arg.isPercentVal() &&
(!type || !type->IsLengthlessIntrinsicType() || arg.Rank() != 0)) {
messages.Say(
"%VAL argument must be a scalar numeric or logical expression"_err_en_US);
}
if (const auto *expr{arg.UnwrapExpr()}) {
if (const Symbol * base{GetFirstSymbol(*expr)};
base && IsFunctionResult(*base)) {
context.NoteDefinedSymbol(*base);
}
if (IsBOZLiteral(*expr)) {
messages.Say("BOZ argument requires an explicit interface"_err_en_US);
} else if (evaluate::IsNullPointer(*expr)) {
messages.Say(
"Null pointer argument requires an explicit interface"_err_en_US);
} else if (auto named{evaluate::ExtractNamedEntity(*expr)}) {
const Symbol &symbol{named->GetLastSymbol()};
if (symbol.Corank() > 0) {
messages.Say(
"Coarray argument requires an explicit interface"_err_en_US);
}
if (evaluate::IsAssumedRank(symbol)) {
messages.Say(
"Assumed rank argument requires an explicit interface"_err_en_US);
}
if (symbol.attrs().test(Attr::ASYNCHRONOUS)) {
messages.Say(
"ASYNCHRONOUS argument requires an explicit interface"_err_en_US);
}
if (symbol.attrs().test(Attr::VOLATILE)) {
messages.Say(
"VOLATILE argument requires an explicit interface"_err_en_US);
}
} else if (auto argChars{characteristics::DummyArgument::FromActual(
"actual argument", *expr, context.foldingContext(),
/*forImplicitInterface=*/true)}) {
const auto *argProcDesignator{
std::get_if<evaluate::ProcedureDesignator>(&expr->u)};
if (const auto *argProcSymbol{
argProcDesignator ? argProcDesignator->GetSymbol() : nullptr}) {
if (!argChars->IsTypelessIntrinsicDummy() && argProcDesignator &&
argProcDesignator->IsElemental()) { // C1533
evaluate::SayWithDeclaration(messages, *argProcSymbol,
"Non-intrinsic ELEMENTAL procedure '%s' may not be passed as an actual argument"_err_en_US,
argProcSymbol->name());
} else if (const auto *subp{argProcSymbol->GetUltimate()
.detailsIf<SubprogramDetails>()}) {
if (subp->stmtFunction()) {
evaluate::SayWithDeclaration(messages, *argProcSymbol,
"Statement function '%s' may not be passed as an actual argument"_err_en_US,
argProcSymbol->name());
}
}
}
}
}
}
// F'2023 15.5.2.12p1: "Sequence association only applies when the dummy
// argument is an explicit-shape or assumed-size array."
static bool CanAssociateWithStorageSequence(
const characteristics::DummyDataObject &dummy) {
return !dummy.type.attrs().test(
characteristics::TypeAndShape::Attr::AssumedRank) &&
!dummy.type.attrs().test(
characteristics::TypeAndShape::Attr::AssumedShape) &&
!dummy.type.attrs().test(characteristics::TypeAndShape::Attr::Coarray) &&
!dummy.attrs.test(characteristics::DummyDataObject::Attr::Allocatable) &&
!dummy.attrs.test(characteristics::DummyDataObject::Attr::Pointer);
}
// When a CHARACTER actual argument is known to be short,
// we extend it on the right with spaces and a warning if
// possible. When it is long, and not required to be equal,
// the usage conforms to the standard and no warning is needed.
static void CheckCharacterActual(evaluate::Expr<evaluate::SomeType> &actual,
const characteristics::DummyDataObject &dummy,
characteristics::TypeAndShape &actualType, SemanticsContext &context,
parser::ContextualMessages &messages, bool extentErrors,
const std::string &dummyName) {
if (dummy.type.type().category() == TypeCategory::Character &&
actualType.type().category() == TypeCategory::Character &&
dummy.type.type().kind() == actualType.type().kind() &&
!dummy.attrs.test(
characteristics::DummyDataObject::Attr::DeducedFromActual)) {
if (dummy.type.LEN() && actualType.LEN()) {
evaluate::FoldingContext &foldingContext{context.foldingContext()};
auto dummyLength{
ToInt64(Fold(foldingContext, common::Clone(*dummy.type.LEN())))};
auto actualLength{
ToInt64(Fold(foldingContext, common::Clone(*actualType.LEN())))};
if (dummyLength && actualLength) {
bool canAssociate{CanAssociateWithStorageSequence(dummy)};
if (dummy.type.Rank() > 0 && canAssociate) {
// Character storage sequence association (F'2023 15.5.2.12p4)
if (auto dummySize{evaluate::ToInt64(evaluate::Fold(
foldingContext, evaluate::GetSize(dummy.type.shape())))}) {
auto dummyChars{*dummySize * *dummyLength};
if (actualType.Rank() == 0) {
evaluate::DesignatorFolder folder{
context.foldingContext(), /*getLastComponent=*/true};
if (auto actualOffset{folder.FoldDesignator(actual)}) {
std::int64_t actualChars{*actualLength};
if (static_cast<std::size_t>(actualOffset->offset()) >=
actualOffset->symbol().size() ||
!evaluate::IsContiguous(
actualOffset->symbol(), foldingContext)) {
// If substring, take rest of substring
if (*actualLength > 0) {
actualChars -=
(actualOffset->offset() / actualType.type().kind()) %
*actualLength;
}
} else {
actualChars = (static_cast<std::int64_t>(
actualOffset->symbol().size()) -
actualOffset->offset()) /
actualType.type().kind();
}
if (actualChars < dummyChars &&
(extentErrors ||
context.ShouldWarn(
common::UsageWarning::ShortCharacterActual))) {
auto msg{
"Actual argument has fewer characters remaining in storage sequence (%jd) than %s (%jd)"_warn_en_US};
if (extentErrors) {
msg.set_severity(parser::Severity::Error);
}
messages.Say(std::move(msg),
static_cast<std::intmax_t>(actualChars), dummyName,
static_cast<std::intmax_t>(dummyChars));
}
}
} else { // actual.type.Rank() > 0
if (auto actualSize{evaluate::ToInt64(evaluate::Fold(
foldingContext, evaluate::GetSize(actualType.shape())))};
actualSize &&
*actualSize * *actualLength < *dummySize * *dummyLength &&
(extentErrors ||
context.ShouldWarn(
common::UsageWarning::ShortCharacterActual))) {
auto msg{
"Actual argument array has fewer characters (%jd) than %s array (%jd)"_warn_en_US};
if (extentErrors) {
msg.set_severity(parser::Severity::Error);
}
messages.Say(std::move(msg),
static_cast<std::intmax_t>(*actualSize * *actualLength),
dummyName,
static_cast<std::intmax_t>(*dummySize * *dummyLength));
}
}
}
} else if (*actualLength != *dummyLength) {
// Not using storage sequence association, and the lengths don't
// match.
if (!canAssociate) {
// F'2023 15.5.2.5 paragraph 4
messages.Say(
"Actual argument variable length '%jd' does not match the expected length '%jd'"_err_en_US,
*actualLength, *dummyLength);
} else if (*actualLength < *dummyLength) {
CHECK(dummy.type.Rank() == 0);
bool isVariable{evaluate::IsVariable(actual)};
if (context.ShouldWarn(
common::UsageWarning::ShortCharacterActual)) {
if (isVariable) {
messages.Say(
"Actual argument variable length '%jd' is less than expected length '%jd'"_warn_en_US,
*actualLength, *dummyLength);
} else {
messages.Say(
"Actual argument expression length '%jd' is less than expected length '%jd'"_warn_en_US,
*actualLength, *dummyLength);
}
}
if (!isVariable) {
auto converted{
ConvertToType(dummy.type.type(), std::move(actual))};
CHECK(converted);
actual = std::move(*converted);
actualType.set_LEN(SubscriptIntExpr{*dummyLength});
}
}
}
}
}
}
}
// Automatic conversion of different-kind INTEGER scalar actual
// argument expressions (not variables) to INTEGER scalar dummies.
// We return nonstandard INTEGER(8) results from intrinsic functions
// like SIZE() by default in order to facilitate the use of large
// arrays. Emit a warning when downconverting.
static void ConvertIntegerActual(evaluate::Expr<evaluate::SomeType> &actual,
const characteristics::TypeAndShape &dummyType,
characteristics::TypeAndShape &actualType,
parser::ContextualMessages &messages, SemanticsContext &semanticsContext) {
if (dummyType.type().category() == TypeCategory::Integer &&
actualType.type().category() == TypeCategory::Integer &&
dummyType.type().kind() != actualType.type().kind() &&
dummyType.Rank() == 0 && actualType.Rank() == 0 &&
!evaluate::IsVariable(actual)) {
auto converted{
evaluate::ConvertToType(dummyType.type(), std::move(actual))};
CHECK(converted);
actual = std::move(*converted);
if (dummyType.type().kind() < actualType.type().kind()) {
if (!semanticsContext.IsEnabled(
common::LanguageFeature::ActualIntegerConvertedToSmallerKind) ||
semanticsContext.ShouldWarn(
common::LanguageFeature::ActualIntegerConvertedToSmallerKind)) {
std::optional<parser::MessageFixedText> msg;
if (!semanticsContext.IsEnabled(
common::LanguageFeature::ActualIntegerConvertedToSmallerKind)) {
msg =
"Actual argument scalar expression of type INTEGER(%d) cannot beimplicitly converted to smaller dummy argument type INTEGER(%d)"_err_en_US;
} else if (semanticsContext.ShouldWarn(
common::LanguageFeature::ConvertedArgument)) {
msg =
"Actual argument scalar expression of type INTEGER(%d) was converted to smaller dummy argument type INTEGER(%d)"_port_en_US;
}
if (msg) {
messages.Say(std::move(msg.value()), actualType.type().kind(),
dummyType.type().kind());
}
}
}
actualType = dummyType;
}
}
// Automatic conversion of different-kind LOGICAL scalar actual argument
// expressions (not variables) to LOGICAL scalar dummies when the dummy is of
// default logical kind. This allows expressions in dummy arguments to work when
// the default logical kind is not the one used in LogicalResult. This will
// always be safe even when downconverting so no warning is needed.
static void ConvertLogicalActual(evaluate::Expr<evaluate::SomeType> &actual,
const characteristics::TypeAndShape &dummyType,
characteristics::TypeAndShape &actualType) {
if (dummyType.type().category() == TypeCategory::Logical &&
actualType.type().category() == TypeCategory::Logical &&
dummyType.type().kind() != actualType.type().kind() &&
!evaluate::IsVariable(actual)) {
auto converted{
evaluate::ConvertToType(dummyType.type(), std::move(actual))};
CHECK(converted);
actual = std::move(*converted);
actualType = dummyType;
}
}
static bool DefersSameTypeParameters(
const DerivedTypeSpec &actual, const DerivedTypeSpec &dummy) {
for (const auto &pair : actual.parameters()) {
const ParamValue &actualValue{pair.second};
const ParamValue *dummyValue{dummy.FindParameter(pair.first)};
if (!dummyValue || (actualValue.isDeferred() != dummyValue->isDeferred())) {
return false;
}
}
return true;
}
static void CheckExplicitDataArg(const characteristics::DummyDataObject &dummy,
const std::string &dummyName, evaluate::Expr<evaluate::SomeType> &actual,
characteristics::TypeAndShape &actualType, bool isElemental,
SemanticsContext &context, evaluate::FoldingContext &foldingContext,
const Scope *scope, const evaluate::SpecificIntrinsic *intrinsic,
bool allowActualArgumentConversions, bool extentErrors,
const characteristics::Procedure &procedure,
const evaluate::ActualArgument &arg) {
// Basic type & rank checking
parser::ContextualMessages &messages{foldingContext.messages()};
CheckCharacterActual(
actual, dummy, actualType, context, messages, extentErrors, dummyName);
bool dummyIsAllocatable{
dummy.attrs.test(characteristics::DummyDataObject::Attr::Allocatable)};
bool dummyIsPointer{
dummy.attrs.test(characteristics::DummyDataObject::Attr::Pointer)};
bool dummyIsAllocatableOrPointer{dummyIsAllocatable || dummyIsPointer};
allowActualArgumentConversions &= !dummyIsAllocatableOrPointer;
bool typesCompatibleWithIgnoreTKR{
(dummy.ignoreTKR.test(common::IgnoreTKR::Type) &&
(dummy.type.type().category() == TypeCategory::Derived ||
actualType.type().category() == TypeCategory::Derived ||
dummy.type.type().category() != actualType.type().category())) ||
(dummy.ignoreTKR.test(common::IgnoreTKR::Kind) &&
dummy.type.type().category() == actualType.type().category())};
allowActualArgumentConversions &= !typesCompatibleWithIgnoreTKR;
if (allowActualArgumentConversions) {
ConvertIntegerActual(actual, dummy.type, actualType, messages, context);
ConvertLogicalActual(actual, dummy.type, actualType);
}
bool typesCompatible{typesCompatibleWithIgnoreTKR ||
dummy.type.type().IsTkCompatibleWith(actualType.type())};
int dummyRank{dummy.type.Rank()};
if (typesCompatible) {
if (const auto *constantChar{
evaluate::UnwrapConstantValue<evaluate::Ascii>(actual)};
constantChar && constantChar->wasHollerith() &&
dummy.type.type().IsUnlimitedPolymorphic() &&
context.ShouldWarn(common::LanguageFeature::HollerithPolymorphic)) {
messages.Say(
"passing Hollerith to unlimited polymorphic as if it were CHARACTER"_port_en_US);
}
} else if (dummyRank == 0 && allowActualArgumentConversions) {
// Extension: pass Hollerith literal to scalar as if it had been BOZ
if (auto converted{evaluate::HollerithToBOZ(
foldingContext, actual, dummy.type.type())}) {
if (context.ShouldWarn(
common::LanguageFeature::HollerithOrCharacterAsBOZ)) {
messages.Say(
"passing Hollerith or character literal as if it were BOZ"_port_en_US);
}
actual = *converted;
actualType.type() = dummy.type.type();
typesCompatible = true;
}
}
bool dummyIsAssumedRank{dummy.type.attrs().test(
characteristics::TypeAndShape::Attr::AssumedRank)};
if (typesCompatible) {
if (isElemental) {
} else if (dummyIsAssumedRank) {
} else if (dummy.ignoreTKR.test(common::IgnoreTKR::Rank)) {
} else if (dummyRank > 0 && !dummyIsAllocatableOrPointer &&
!dummy.type.attrs().test(
characteristics::TypeAndShape::Attr::AssumedShape) &&
!dummy.type.attrs().test(
characteristics::TypeAndShape::Attr::DeferredShape) &&
(actualType.Rank() > 0 || IsArrayElement(actual))) {
// Sequence association (15.5.2.11) applies -- rank need not match
// if the actual argument is an array or array element designator,
// and the dummy is an array, but not assumed-shape or an INTENT(IN)
// pointer that's standing in for an assumed-shape dummy.
} else if (dummy.type.shape() && actualType.shape()) {
// Let CheckConformance accept actual scalars; storage association
// cases are checked here below.
CheckConformance(messages, *dummy.type.shape(), *actualType.shape(),
dummyIsAllocatableOrPointer
? evaluate::CheckConformanceFlags::None
: evaluate::CheckConformanceFlags::RightScalarExpandable,
"dummy argument", "actual argument");
}
} else {
const auto &len{actualType.LEN()};
messages.Say(
"Actual argument type '%s' is not compatible with dummy argument type '%s'"_err_en_US,
actualType.type().AsFortran(len ? len->AsFortran() : ""),
dummy.type.type().AsFortran());
}
bool actualIsPolymorphic{actualType.type().IsPolymorphic()};
bool dummyIsPolymorphic{dummy.type.type().IsPolymorphic()};
bool actualIsCoindexed{ExtractCoarrayRef(actual).has_value()};
bool actualIsAssumedSize{actualType.attrs().test(
characteristics::TypeAndShape::Attr::AssumedSize)};
bool dummyIsAssumedSize{dummy.type.attrs().test(
characteristics::TypeAndShape::Attr::AssumedSize)};
bool dummyIsAsynchronous{
dummy.attrs.test(characteristics::DummyDataObject::Attr::Asynchronous)};
bool dummyIsVolatile{
dummy.attrs.test(characteristics::DummyDataObject::Attr::Volatile)};
bool dummyIsValue{
dummy.attrs.test(characteristics::DummyDataObject::Attr::Value)};
if (actualIsPolymorphic && dummyIsPolymorphic &&
actualIsCoindexed) { // 15.5.2.4(2)
messages.Say(
"Coindexed polymorphic object may not be associated with a polymorphic %s"_err_en_US,
dummyName);
}
if (actualIsPolymorphic && !dummyIsPolymorphic &&
actualIsAssumedSize) { // 15.5.2.4(2)
messages.Say(
"Assumed-size polymorphic array may not be associated with a monomorphic %s"_err_en_US,
dummyName);
}
// Derived type actual argument checks
const Symbol *actualFirstSymbol{evaluate::GetFirstSymbol(actual)};
bool actualIsAsynchronous{
actualFirstSymbol && actualFirstSymbol->attrs().test(Attr::ASYNCHRONOUS)};
bool actualIsVolatile{
actualFirstSymbol && actualFirstSymbol->attrs().test(Attr::VOLATILE)};
const auto *derived{evaluate::GetDerivedTypeSpec(actualType.type())};
if (derived && !derived->IsVectorType()) {
if (dummy.type.type().IsAssumedType()) {
if (!derived->parameters().empty()) { // 15.5.2.4(2)
messages.Say(
"Actual argument associated with TYPE(*) %s may not have a parameterized derived type"_err_en_US,
dummyName);
}
if (const Symbol *
tbp{FindImmediateComponent(*derived, [](const Symbol &symbol) {
return symbol.has<ProcBindingDetails>();
})}) { // 15.5.2.4(2)
evaluate::SayWithDeclaration(messages, *tbp,
"Actual argument associated with TYPE(*) %s may not have type-bound procedure '%s'"_err_en_US,
dummyName, tbp->name());
}
auto finals{FinalsForDerivedTypeInstantiation(*derived)};
if (!finals.empty()) { // 15.5.2.4(2)
SourceName name{finals.front()->name()};
if (auto *msg{messages.Say(
"Actual argument associated with TYPE(*) %s may not have derived type '%s' with FINAL subroutine '%s'"_err_en_US,
dummyName, derived->typeSymbol().name(), name)}) {
msg->Attach(name, "FINAL subroutine '%s' in derived type '%s'"_en_US,
name, derived->typeSymbol().name());
}
}
}
if (actualIsCoindexed) {
if (dummy.intent != common::Intent::In && !dummyIsValue) {
if (auto bad{
FindAllocatableUltimateComponent(*derived)}) { // 15.5.2.4(6)
evaluate::SayWithDeclaration(messages, *bad,
"Coindexed actual argument with ALLOCATABLE ultimate component '%s' must be associated with a %s with VALUE or INTENT(IN) attributes"_err_en_US,
bad.BuildResultDesignatorName(), dummyName);
}
}
if (auto coarrayRef{evaluate::ExtractCoarrayRef(actual)}) { // C1537
const Symbol &coarray{coarrayRef->GetLastSymbol()};
if (const DeclTypeSpec * type{coarray.GetType()}) {
if (const DerivedTypeSpec * derived{type->AsDerived()}) {
if (auto bad{semantics::FindPointerUltimateComponent(*derived)}) {
evaluate::SayWithDeclaration(messages, coarray,
"Coindexed object '%s' with POINTER ultimate component '%s' cannot be associated with %s"_err_en_US,
coarray.name(), bad.BuildResultDesignatorName(), dummyName);
}
}
}
}
}
if (actualIsVolatile != dummyIsVolatile) { // 15.5.2.4(22)
if (auto bad{semantics::FindCoarrayUltimateComponent(*derived)}) {
evaluate::SayWithDeclaration(messages, *bad,
"VOLATILE attribute must match for %s when actual argument has a coarray ultimate component '%s'"_err_en_US,
dummyName, bad.BuildResultDesignatorName());
}
}
}
// Rank and shape checks
const auto *actualLastSymbol{evaluate::GetLastSymbol(actual)};
if (actualLastSymbol) {
actualLastSymbol = &ResolveAssociations(*actualLastSymbol);
}
const ObjectEntityDetails *actualLastObject{actualLastSymbol
? actualLastSymbol->detailsIf<ObjectEntityDetails>()
: nullptr};
int actualRank{actualType.Rank()};
bool actualIsPointer{evaluate::IsObjectPointer(actual)};
bool actualIsAssumedRank{evaluate::IsAssumedRank(actual)};
if (dummy.type.attrs().test(
characteristics::TypeAndShape::Attr::AssumedShape)) {
// 15.5.2.4(16)
if (actualIsAssumedRank) {
messages.Say(
"Assumed-rank actual argument may not be associated with assumed-shape %s"_err_en_US,
dummyName);
} else if (actualRank == 0) {
messages.Say(
"Scalar actual argument may not be associated with assumed-shape %s"_err_en_US,
dummyName);
} else if (actualIsAssumedSize && actualLastSymbol) {
evaluate::SayWithDeclaration(messages, *actualLastSymbol,
"Assumed-size array may not be associated with assumed-shape %s"_err_en_US,
dummyName);
}
} else if (dummyRank > 0) {
bool basicError{false};
if (actualRank == 0 && !actualIsAssumedRank &&
!dummyIsAllocatableOrPointer) {
// Actual is scalar, dummy is an array. F'2023 15.5.2.5p14
if (actualIsCoindexed) {
basicError = true;
messages.Say(
"Coindexed scalar actual argument must be associated with a scalar %s"_err_en_US,
dummyName);
}
bool actualIsArrayElement{IsArrayElement(actual)};
bool actualIsCKindCharacter{
actualType.type().category() == TypeCategory::Character &&
actualType.type().kind() == 1};
if (!actualIsCKindCharacter) {
if (!actualIsArrayElement &&
!(dummy.type.type().IsAssumedType() && dummyIsAssumedSize) &&
!dummyIsAssumedRank &&
!dummy.ignoreTKR.test(common::IgnoreTKR::Rank)) {
basicError = true;
messages.Say(
"Whole scalar actual argument may not be associated with a %s array"_err_en_US,
dummyName);
}
if (actualIsPolymorphic) {
basicError = true;
messages.Say(
"Polymorphic scalar may not be associated with a %s array"_err_en_US,
dummyName);
}
if (actualIsArrayElement && actualLastSymbol &&
!evaluate::IsContiguous(*actualLastSymbol, foldingContext) &&
!dummy.ignoreTKR.test(common::IgnoreTKR::Contiguous)) {
if (IsPointer(*actualLastSymbol)) {
basicError = true;
messages.Say(
"Element of pointer array may not be associated with a %s array"_err_en_US,
dummyName);
} else if (IsAssumedShape(*actualLastSymbol) &&
!dummy.ignoreTKR.test(common::IgnoreTKR::Contiguous)) {
basicError = true;
messages.Say(
"Element of assumed-shape array may not be associated with a %s array"_err_en_US,
dummyName);
}
}
}
}
// Storage sequence association (F'2023 15.5.2.12p3) checks.
// Character storage sequence association is checked in
// CheckCharacterActual().
if (!basicError &&
actualType.type().category() != TypeCategory::Character &&
CanAssociateWithStorageSequence(dummy) &&
!dummy.attrs.test(
characteristics::DummyDataObject::Attr::DeducedFromActual)) {
if (auto dummySize{evaluate::ToInt64(evaluate::Fold(
foldingContext, evaluate::GetSize(dummy.type.shape())))}) {
if (actualRank == 0 && !actualIsAssumedRank) {
if (evaluate::IsArrayElement(actual)) {
// Actual argument is a scalar array element
evaluate::DesignatorFolder folder{
context.foldingContext(), /*getLastComponent=*/true};
if (auto actualOffset{folder.FoldDesignator(actual)}) {
std::optional<std::int64_t> actualElements;
if (static_cast<std::size_t>(actualOffset->offset()) >=
actualOffset->symbol().size() ||
!evaluate::IsContiguous(
actualOffset->symbol(), foldingContext)) {
actualElements = 1;
} else if (auto actualSymType{evaluate::DynamicType::From(
actualOffset->symbol())}) {
if (auto actualSymTypeBytes{
evaluate::ToInt64(evaluate::Fold(foldingContext,
actualSymType->MeasureSizeInBytes(
foldingContext, false)))};
actualSymTypeBytes && *actualSymTypeBytes > 0) {
actualElements = (static_cast<std::int64_t>(
actualOffset->symbol().size()) -
actualOffset->offset()) /
*actualSymTypeBytes;
}
}
if (actualElements && *actualElements < *dummySize &&
(extentErrors ||
context.ShouldWarn(
common::UsageWarning::ShortArrayActual))) {
auto msg{
"Actual argument has fewer elements remaining in storage sequence (%jd) than %s array (%jd)"_warn_en_US};
if (extentErrors) {
msg.set_severity(parser::Severity::Error);
}
messages.Say(std::move(msg),
static_cast<std::intmax_t>(*actualElements), dummyName,
static_cast<std::intmax_t>(*dummySize));
}
}
}
} else { // actualRank > 0 || actualIsAssumedRank
if (auto actualSize{evaluate::ToInt64(evaluate::Fold(
foldingContext, evaluate::GetSize(actualType.shape())))};
actualSize && *actualSize < *dummySize &&
(extentErrors ||
context.ShouldWarn(common::UsageWarning::ShortArrayActual))) {
auto msg{
"Actual argument array has fewer elements (%jd) than %s array (%jd)"_warn_en_US};
if (extentErrors) {
msg.set_severity(parser::Severity::Error);
}
messages.Say(std::move(msg),
static_cast<std::intmax_t>(*actualSize), dummyName,
static_cast<std::intmax_t>(*dummySize));
}
}
}
}
}
if (actualLastObject && actualLastObject->IsCoarray() &&
IsAllocatable(*actualLastSymbol) && dummy.intent == common::Intent::Out &&
!(intrinsic &&
evaluate::AcceptsIntentOutAllocatableCoarray(
intrinsic->name))) { // C846
messages.Say(
"ALLOCATABLE coarray '%s' may not be associated with INTENT(OUT) %s"_err_en_US,
actualLastSymbol->name(), dummyName);
}
// Definability checking
// Problems with polymorphism are caught in the callee's definition.
if (scope) {
std::optional<parser::MessageFixedText> undefinableMessage;
if (dummy.intent == common::Intent::Out) {
undefinableMessage =
"Actual argument associated with INTENT(OUT) %s is not definable"_err_en_US;
} else if (dummy.intent == common::Intent::InOut) {
undefinableMessage =
"Actual argument associated with INTENT(IN OUT) %s is not definable"_err_en_US;
} else if (context.ShouldWarn(common::LanguageFeature::
UndefinableAsynchronousOrVolatileActual)) {
if (dummy.attrs.test(
characteristics::DummyDataObject::Attr::Asynchronous)) {
undefinableMessage =
"Actual argument associated with ASYNCHRONOUS %s is not definable"_warn_en_US;
} else if (dummy.attrs.test(
characteristics::DummyDataObject::Attr::Volatile)) {
undefinableMessage =
"Actual argument associated with VOLATILE %s is not definable"_warn_en_US;
}
}
if (undefinableMessage) {
DefinabilityFlags flags{DefinabilityFlag::PolymorphicOkInPure};
if (isElemental) { // 15.5.2.4(21)
flags.set(DefinabilityFlag::VectorSubscriptIsOk);
}
if (actualIsPointer && dummyIsPointer) { // 19.6.8
flags.set(DefinabilityFlag::PointerDefinition);
}
if (auto whyNot{WhyNotDefinable(messages.at(), *scope, flags, actual)}) {
if (whyNot->IsFatal()) {
if (auto *msg{
messages.Say(std::move(*undefinableMessage), dummyName)}) {
msg->Attach(
std::move(whyNot->set_severity(parser::Severity::Because)));
}
} else {
messages.Say(std::move(*whyNot));
}
}
} else if (dummy.intent != common::Intent::In ||
(dummyIsPointer && !actualIsPointer)) {
if (auto named{evaluate::ExtractNamedEntity(actual)}) {
if (const Symbol & base{named->GetFirstSymbol()};
IsFunctionResult(base)) {
context.NoteDefinedSymbol(base);
}
}
}
}
// Cases when temporaries might be needed but must not be permitted.
bool actualIsContiguous{IsSimplyContiguous(actual, foldingContext)};
bool dummyIsAssumedShape{dummy.type.attrs().test(
characteristics::TypeAndShape::Attr::AssumedShape)};
bool dummyIsContiguous{
dummy.attrs.test(characteristics::DummyDataObject::Attr::Contiguous)};
if ((actualIsAsynchronous || actualIsVolatile) &&
(dummyIsAsynchronous || dummyIsVolatile) && !dummyIsValue) {
if (actualIsCoindexed) { // C1538
messages.Say(
"Coindexed ASYNCHRONOUS or VOLATILE actual argument may not be associated with %s with ASYNCHRONOUS or VOLATILE attributes unless VALUE"_err_en_US,
dummyName);
}
if ((actualRank > 0 || actualIsAssumedRank) && !actualIsContiguous) {
if (dummyIsContiguous ||
!(dummyIsAssumedShape || dummyIsAssumedRank ||
(actualIsPointer && dummyIsPointer))) { // C1539 & C1540
messages.Say(
"ASYNCHRONOUS or VOLATILE actual argument that is not simply contiguous may not be associated with a contiguous ASYNCHRONOUS or VOLATILE %s"_err_en_US,
dummyName);
}
}
}
// 15.5.2.6 -- dummy is ALLOCATABLE
bool actualIsAllocatable{evaluate::IsAllocatableDesignator(actual)};
bool dummyIsOptional{
dummy.attrs.test(characteristics::DummyDataObject::Attr::Optional)};
bool actualIsNull{evaluate::IsNullPointer(actual)};
if (dummyIsAllocatable) {
if (actualIsAllocatable) {
if (actualIsCoindexed && dummy.intent != common::Intent::In) {
messages.Say(
"ALLOCATABLE %s must have INTENT(IN) to be associated with a coindexed actual argument"_err_en_US,
dummyName);
}
} else if (actualIsNull) {
if (dummyIsOptional) {
} else if (dummy.intent == common::Intent::In) {
// Extension (Intel, NAG, XLF): a NULL() pointer is an acceptable
// actual argument for an INTENT(IN) allocatable dummy, and it
// is treated as an unassociated allocatable.
if (context.ShouldWarn(
common::LanguageFeature::NullActualForAllocatable)) {
messages.Say(
"Allocatable %s is associated with a null pointer"_port_en_US,
dummyName);
}
} else {
messages.Say(
"A null pointer may not be associated with allocatable %s without INTENT(IN)"_err_en_US,
dummyName);
}
} else {
messages.Say(
"ALLOCATABLE %s must be associated with an ALLOCATABLE actual argument"_err_en_US,
dummyName);
}
if (!actualIsCoindexed && actualLastSymbol &&
actualLastSymbol->Corank() != dummy.type.corank()) {
messages.Say(
"ALLOCATABLE %s has corank %d but actual argument has corank %d"_err_en_US,
dummyName, dummy.type.corank(), actualLastSymbol->Corank());
}
}
// 15.5.2.7 -- dummy is POINTER
if (dummyIsPointer) {
if (actualIsPointer || dummy.intent == common::Intent::In) {
if (scope) {
semantics::CheckPointerAssignment(context, messages.at(), dummyName,
dummy, actual, *scope,
/*isAssumedRank=*/dummyIsAssumedRank);
}
} else if (!actualIsPointer) {
messages.Say(
"Actual argument associated with POINTER %s must also be POINTER unless INTENT(IN)"_err_en_US,
dummyName);
}
}
// 15.5.2.5 -- actual & dummy are both POINTER or both ALLOCATABLE
// For INTENT(IN), and for a polymorphic actual being associated with a
// monomorphic dummy, we relax two checks that are in Fortran to
// prevent the callee from changing the type or to avoid having
// to use a descriptor.
if (!typesCompatible) {
// Don't pile on the errors emitted above
} else if ((actualIsPointer && dummyIsPointer) ||
(actualIsAllocatable && dummyIsAllocatable)) {
bool actualIsUnlimited{actualType.type().IsUnlimitedPolymorphic()};
bool dummyIsUnlimited{dummy.type.type().IsUnlimitedPolymorphic()};
bool checkTypeCompatibility{true};
if (actualIsUnlimited != dummyIsUnlimited) {
checkTypeCompatibility = false;
if (dummyIsUnlimited && dummy.intent == common::Intent::In &&
context.IsEnabled(common::LanguageFeature::RelaxedIntentInChecking)) {
if (context.ShouldWarn(
common::LanguageFeature::RelaxedIntentInChecking)) {
messages.Say(
"If a POINTER or ALLOCATABLE dummy or actual argument is unlimited polymorphic, both should be so"_port_en_US);
}
} else {
messages.Say(
"If a POINTER or ALLOCATABLE dummy or actual argument is unlimited polymorphic, both must be so"_err_en_US);
}
} else if (dummyIsPolymorphic != actualIsPolymorphic) {
if (dummyIsPolymorphic && dummy.intent == common::Intent::In &&
context.IsEnabled(common::LanguageFeature::RelaxedIntentInChecking)) {
if (context.ShouldWarn(
common::LanguageFeature::RelaxedIntentInChecking)) {
messages.Say(
"If a POINTER or ALLOCATABLE dummy or actual argument is polymorphic, both should be so"_port_en_US);
}
} else if (actualIsPolymorphic &&
context.IsEnabled(common::LanguageFeature::
PolymorphicActualAllocatableOrPointerToMonomorphicDummy)) {
if (context.ShouldWarn(common::LanguageFeature::
PolymorphicActualAllocatableOrPointerToMonomorphicDummy)) {
messages.Say(
"If a POINTER or ALLOCATABLE actual argument is polymorphic, the corresponding dummy argument should also be so"_port_en_US);
}
} else {
checkTypeCompatibility = false;
messages.Say(
"If a POINTER or ALLOCATABLE dummy or actual argument is polymorphic, both must be so"_err_en_US);
}
}
if (checkTypeCompatibility && !actualIsUnlimited) {
if (!actualType.type().IsTkCompatibleWith(dummy.type.type())) {
if (dummy.intent == common::Intent::In &&
context.IsEnabled(
common::LanguageFeature::RelaxedIntentInChecking)) {
if (context.ShouldWarn(
common::LanguageFeature::RelaxedIntentInChecking)) {
messages.Say(
"POINTER or ALLOCATABLE dummy and actual arguments should have the same declared type and kind"_port_en_US);
}
} else {
messages.Say(
"POINTER or ALLOCATABLE dummy and actual arguments must have the same declared type and kind"_err_en_US);
}
}
// 15.5.2.5(4)
const auto *derived{evaluate::GetDerivedTypeSpec(actualType.type())};
if ((derived &&
!DefersSameTypeParameters(*derived,
*evaluate::GetDerivedTypeSpec(dummy.type.type()))) ||
dummy.type.type().HasDeferredTypeParameter() !=
actualType.type().HasDeferredTypeParameter()) {
messages.Say(
"Dummy and actual arguments must defer the same type parameters when POINTER or ALLOCATABLE"_err_en_US);
}
}
}
// 15.5.2.8 -- coarray dummy arguments
if (dummy.type.corank() > 0) {
if (actualType.corank() == 0) {
messages.Say(
"Actual argument associated with coarray %s must be a coarray"_err_en_US,
dummyName);
}
if (dummyIsVolatile) {
if (!actualIsVolatile) {
messages.Say(
"non-VOLATILE coarray may not be associated with VOLATILE coarray %s"_err_en_US,
dummyName);
}
} else {
if (actualIsVolatile) {
messages.Say(
"VOLATILE coarray may not be associated with non-VOLATILE coarray %s"_err_en_US,
dummyName);
}
}
if (actualRank == dummyRank && !actualIsContiguous) {
if (dummyIsContiguous) {
messages.Say(
"Actual argument associated with a CONTIGUOUS coarray %s must be simply contiguous"_err_en_US,
dummyName);
} else if (!dummyIsAssumedShape && !dummyIsAssumedRank) {
messages.Say(
"Actual argument associated with coarray %s (not assumed shape or rank) must be simply contiguous"_err_en_US,
dummyName);
}
}
}
// NULL(MOLD=) checking for non-intrinsic procedures
if (!intrinsic && !dummyIsAllocatableOrPointer && !dummyIsOptional &&
actualIsNull) {
messages.Say(
"Actual argument associated with %s may not be null pointer %s"_err_en_US,
dummyName, actual.AsFortran());
}
// Warn about dubious actual argument association with a TARGET dummy
// argument
if (dummy.attrs.test(characteristics::DummyDataObject::Attr::Target) &&
context.ShouldWarn(common::UsageWarning::NonTargetPassedToTarget)) {
bool actualIsVariable{evaluate::IsVariable(actual)};
bool actualIsTemp{!actualIsVariable || HasVectorSubscript(actual) ||
evaluate::ExtractCoarrayRef(actual)};
if (actualIsTemp) {
messages.Say(
"Any pointer associated with TARGET %s during this call will not be associated with the value of '%s' afterwards"_warn_en_US,
dummyName, actual.AsFortran());
} else {
auto actualSymbolVector{GetSymbolVector(actual)};
if (!evaluate::GetLastTarget(actualSymbolVector)) {
messages.Say(
"Any pointer associated with TARGET %s during this call must not be used afterwards, as '%s' is not a target"_warn_en_US,
dummyName, actual.AsFortran());
}
}
}
// CUDA specific checks
// TODO: These are disabled in OpenACC constructs, which may not be
// correct when the target is not a GPU.
if (!intrinsic &&
!dummy.attrs.test(characteristics::DummyDataObject::Attr::Value) &&
!FindOpenACCConstructContaining(scope)) {
std::optional<common::CUDADataAttr> actualDataAttr, dummyDataAttr;
if (const auto *actualObject{actualLastSymbol
? actualLastSymbol->detailsIf<ObjectEntityDetails>()
: nullptr}) {
actualDataAttr = actualObject->cudaDataAttr();
}
dummyDataAttr = dummy.cudaDataAttr;
// Treat MANAGED like DEVICE for nonallocatable nonpointer arguments to
// device subprograms
if (procedure.cudaSubprogramAttrs.value_or(
common::CUDASubprogramAttrs::Host) !=
common::CUDASubprogramAttrs::Host &&
!dummy.attrs.test(
characteristics::DummyDataObject::Attr::Allocatable) &&
!dummy.attrs.test(characteristics::DummyDataObject::Attr::Pointer)) {
if (!dummyDataAttr || *dummyDataAttr == common::CUDADataAttr::Managed) {
dummyDataAttr = common::CUDADataAttr::Device;
}
if ((!actualDataAttr && FindCUDADeviceContext(scope)) ||
(actualDataAttr &&
*actualDataAttr == common::CUDADataAttr::Managed)) {
actualDataAttr = common::CUDADataAttr::Device;
}
}
if (!common::AreCompatibleCUDADataAttrs(dummyDataAttr, actualDataAttr,
dummy.ignoreTKR,
/*allowUnifiedMatchingRule=*/true, &context.languageFeatures())) {
auto toStr{[](std::optional<common::CUDADataAttr> x) {
return x ? "ATTRIBUTES("s +
parser::ToUpperCaseLetters(common::EnumToString(*x)) + ")"s
: "no CUDA data attribute"s;
}};
messages.Say(
"%s has %s but its associated actual argument has %s"_err_en_US,
dummyName, toStr(dummyDataAttr), toStr(actualDataAttr));
}
}
// Warning for breaking F'2023 change with character allocatables
if (intrinsic && dummy.intent != common::Intent::In) {
WarnOnDeferredLengthCharacterScalar(
context, &actual, messages.at(), dummyName.c_str());
}
// %VAL() and %REF() checking for explicit interface
if ((arg.isPercentRef() || arg.isPercentVal()) &&
dummy.IsPassedByDescriptor(procedure.IsBindC())) {
messages.Say(
"%%VAL or %%REF are not allowed for %s that must be passed by means of a descriptor"_err_en_US,
dummyName);
}
if (arg.isPercentVal() &&
(!actualType.type().IsLengthlessIntrinsicType() ||
actualType.Rank() != 0)) {
messages.Say(
"%VAL argument must be a scalar numeric or logical expression"_err_en_US);
}
}
static void CheckProcedureArg(evaluate::ActualArgument &arg,
const characteristics::Procedure &proc,
const characteristics::DummyProcedure &dummy, const std::string &dummyName,
SemanticsContext &context, bool ignoreImplicitVsExplicit) {
evaluate::FoldingContext &foldingContext{context.foldingContext()};
parser::ContextualMessages &messages{foldingContext.messages()};
auto restorer{
messages.SetLocation(arg.sourceLocation().value_or(messages.at()))};
const characteristics::Procedure &interface { dummy.procedure.value() };
if (const auto *expr{arg.UnwrapExpr()}) {
bool dummyIsPointer{
dummy.attrs.test(characteristics::DummyProcedure::Attr::Pointer)};
const auto *argProcDesignator{
std::get_if<evaluate::ProcedureDesignator>(&expr->u)};
const auto *argProcSymbol{
argProcDesignator ? argProcDesignator->GetSymbol() : nullptr};
if (argProcSymbol) {
if (const auto *subp{
argProcSymbol->GetUltimate().detailsIf<SubprogramDetails>()}) {
if (subp->stmtFunction()) {
evaluate::SayWithDeclaration(messages, *argProcSymbol,
"Statement function '%s' may not be passed as an actual argument"_err_en_US,
argProcSymbol->name());
return;
}
} else if (argProcSymbol->has<ProcBindingDetails>()) {
if (!context.IsEnabled(common::LanguageFeature::BindingAsProcedure) ||
context.ShouldWarn(common::LanguageFeature::BindingAsProcedure)) {
parser::MessageFixedText msg{
"Procedure binding '%s' passed as an actual argument"_port_en_US};
if (!context.IsEnabled(common::LanguageFeature::BindingAsProcedure)) {
msg.set_severity(parser::Severity::Error);
}
evaluate::SayWithDeclaration(
messages, *argProcSymbol, std::move(msg), argProcSymbol->name());
}
}
}
if (auto argChars{characteristics::DummyArgument::FromActual(
"actual argument", *expr, foldingContext,
/*forImplicitInterface=*/true)}) {
if (!argChars->IsTypelessIntrinsicDummy()) {
if (auto *argProc{
std::get_if<characteristics::DummyProcedure>(&argChars->u)}) {
characteristics::Procedure &argInterface{argProc->procedure.value()};
argInterface.attrs.reset(
characteristics::Procedure::Attr::NullPointer);
if (!argProcSymbol || argProcSymbol->attrs().test(Attr::INTRINSIC)) {
// It's ok to pass ELEMENTAL unrestricted intrinsic functions.
argInterface.attrs.reset(
characteristics::Procedure::Attr::Elemental);
} else if (argInterface.attrs.test(
characteristics::Procedure::Attr::Elemental)) {
if (argProcSymbol) { // C1533
evaluate::SayWithDeclaration(messages, *argProcSymbol,
"Non-intrinsic ELEMENTAL procedure '%s' may not be passed as an actual argument"_err_en_US,
argProcSymbol->name());
return; // avoid piling on with checks below
} else {
argInterface.attrs.reset(
characteristics::Procedure::Attr::NullPointer);
}
}
if (interface.HasExplicitInterface()) {
std::string whyNot;
std::optional<std::string> warning;
if (!interface.IsCompatibleWith(argInterface,
ignoreImplicitVsExplicit, &whyNot,
/*specificIntrinsic=*/nullptr, &warning)) {
// 15.5.2.9(1): Explicit interfaces must match
if (argInterface.HasExplicitInterface()) {
messages.Say(
"Actual procedure argument has interface incompatible with %s: %s"_err_en_US,
dummyName, whyNot);
return;
} else if (proc.IsPure()) {
messages.Say(
"Actual procedure argument for %s of a PURE procedure must have an explicit interface"_err_en_US,
dummyName);
} else if (context.ShouldWarn(
common::UsageWarning::ImplicitInterfaceActual)) {
messages.Say(
"Actual procedure argument has an implicit interface which is not known to be compatible with %s which has an explicit interface"_warn_en_US,
dummyName);
}
} else if (warning &&
context.ShouldWarn(common::UsageWarning::ProcDummyArgShapes)) {
messages.Say(
"Actual procedure argument has possible interface incompatibility with %s: %s"_warn_en_US,
dummyName, std::move(*warning));
}
} else { // 15.5.2.9(2,3)
if (interface.IsSubroutine() && argInterface.IsFunction()) {
messages.Say(
"Actual argument associated with procedure %s is a function but must be a subroutine"_err_en_US,
dummyName);
} else if (interface.IsFunction()) {
if (argInterface.IsFunction()) {
std::string whyNot;
if (!interface.functionResult->IsCompatibleWith(
*argInterface.functionResult, &whyNot)) {
messages.Say(
"Actual argument function associated with procedure %s is not compatible: %s"_err_en_US,
dummyName, whyNot);
}
} else if (argInterface.IsSubroutine()) {
messages.Say(
"Actual argument associated with procedure %s is a subroutine but must be a function"_err_en_US,
dummyName);
}
}
}
} else {
messages.Say(
"Actual argument associated with procedure %s is not a procedure"_err_en_US,
dummyName);
}
} else if (IsNullPointer(*expr)) {
if (!dummyIsPointer &&
!dummy.attrs.test(
characteristics::DummyProcedure::Attr::Optional)) {
messages.Say(
"Actual argument associated with procedure %s is a null pointer"_err_en_US,
dummyName);
}
} else {
messages.Say(
"Actual argument associated with procedure %s is typeless"_err_en_US,
dummyName);
}
}
if (dummyIsPointer && dummy.intent != common::Intent::In) {
const Symbol *last{GetLastSymbol(*expr)};
if (last && IsProcedurePointer(*last)) {
if (dummy.intent != common::Intent::Default &&
IsIntentIn(last->GetUltimate())) { // 19.6.8
messages.Say(
"Actual argument associated with procedure pointer %s may not be INTENT(IN)"_err_en_US,
dummyName);
}
} else if (!(dummy.intent == common::Intent::Default &&
IsNullProcedurePointer(*expr))) {
// 15.5.2.9(5) -- dummy procedure POINTER
// Interface compatibility has already been checked above
messages.Say(
"Actual argument associated with procedure pointer %s must be a pointer unless INTENT(IN)"_err_en_US,
dummyName);
}
}
} else {
messages.Say(
"Assumed-type argument may not be forwarded as procedure %s"_err_en_US,
dummyName);
}
}
// Allow BOZ literal actual arguments when they can be converted to a known
// dummy argument type
static void ConvertBOZLiteralArg(
evaluate::ActualArgument &arg, const evaluate::DynamicType &type) {
if (auto *expr{arg.UnwrapExpr()}) {
if (IsBOZLiteral(*expr)) {
if (auto converted{evaluate::ConvertToType(type, SomeExpr{*expr})}) {
arg = std::move(*converted);
}
}
}
}
static void CheckExplicitInterfaceArg(evaluate::ActualArgument &arg,
const characteristics::DummyArgument &dummy,
const characteristics::Procedure &proc, SemanticsContext &context,
const Scope *scope, const evaluate::SpecificIntrinsic *intrinsic,
bool allowActualArgumentConversions, bool extentErrors,
bool ignoreImplicitVsExplicit) {
evaluate::FoldingContext &foldingContext{context.foldingContext()};
auto &messages{foldingContext.messages()};
std::string dummyName{"dummy argument"};
if (!dummy.name.empty()) {
dummyName += " '"s + parser::ToLowerCaseLetters(dummy.name) + "='";
}
auto restorer{
messages.SetLocation(arg.sourceLocation().value_or(messages.at()))};
auto CheckActualArgForLabel = [&](evaluate::ActualArgument &arg) {
if (arg.isAlternateReturn()) {
messages.Say(
"Alternate return label '%d' cannot be associated with %s"_err_en_US,
arg.GetLabel(), dummyName);
return false;
} else {
return true;
}
};
common::visit(
common::visitors{
[&](const characteristics::DummyDataObject &object) {
if (CheckActualArgForLabel(arg)) {
ConvertBOZLiteralArg(arg, object.type.type());
if (auto *expr{arg.UnwrapExpr()}) {
if (auto type{characteristics::TypeAndShape::Characterize(
*expr, foldingContext)}) {
arg.set_dummyIntent(object.intent);
bool isElemental{
object.type.Rank() == 0 && proc.IsElemental()};
CheckExplicitDataArg(object, dummyName, *expr, *type,
isElemental, context, foldingContext, scope, intrinsic,
allowActualArgumentConversions, extentErrors, proc, arg);
} else if (object.type.type().IsTypelessIntrinsicArgument() &&
IsBOZLiteral(*expr)) {
// ok
} else if (object.type.type().IsTypelessIntrinsicArgument() &&
evaluate::IsNullObjectPointer(*expr)) {
// ok, ASSOCIATED(NULL(without MOLD=))
} else if (object.type.attrs().test(characteristics::
TypeAndShape::Attr::AssumedRank) &&
evaluate::IsNullObjectPointer(*expr) &&
(object.attrs.test(
characteristics::DummyDataObject::Attr::Allocatable) ||
object.attrs.test(
characteristics::DummyDataObject::Attr::Pointer) ||
!object.attrs.test(characteristics::DummyDataObject::
Attr::Optional))) {
messages.Say(
"NULL() without MOLD= must not be associated with an assumed-rank dummy argument that is ALLOCATABLE, POINTER, or non-OPTIONAL"_err_en_US);
} else if ((object.attrs.test(characteristics::DummyDataObject::
Attr::Pointer) ||
object.attrs.test(characteristics::
DummyDataObject::Attr::Optional)) &&
evaluate::IsNullObjectPointer(*expr)) {
// FOO(NULL(without MOLD=))
if (object.type.type().IsAssumedLengthCharacter()) {
messages.Say(
"Actual argument associated with %s is a NULL() pointer without a MOLD= to provide a character length"_err_en_US,
dummyName);
} else if (const DerivedTypeSpec *
derived{GetDerivedTypeSpec(object.type.type())}) {
for (const auto &[pName, pValue] : derived->parameters()) {
if (pValue.isAssumed()) {
messages.Say(
"Actual argument associated with %s is a NULL() pointer without a MOLD= to provide a value for the assumed type parameter '%s'"_err_en_US,
dummyName, pName.ToString());
break;
}
}
}
} else if (object.attrs.test(characteristics::DummyDataObject::
Attr::Allocatable) &&
evaluate::IsNullPointer(*expr)) {
if (object.intent == common::Intent::In) {
// Extension (Intel, NAG, XLF); see CheckExplicitDataArg.
if (context.ShouldWarn(common::LanguageFeature::
NullActualForAllocatable)) {
messages.Say(
"Allocatable %s is associated with NULL()"_port_en_US,
dummyName);
}
} else {
messages.Say(
"NULL() actual argument '%s' may not be associated with allocatable %s without INTENT(IN)"_err_en_US,
expr->AsFortran(), dummyName);
}
} else {
messages.Say(
"Actual argument '%s' associated with %s is not a variable or typed expression"_err_en_US,
expr->AsFortran(), dummyName);
}
} else {
const Symbol &assumed{DEREF(arg.GetAssumedTypeDummy())};
if (!object.type.type().IsAssumedType()) {
messages.Say(
"Assumed-type '%s' may be associated only with an assumed-type %s"_err_en_US,
assumed.name(), dummyName);
} else if (object.type.attrs().test(characteristics::
TypeAndShape::Attr::AssumedRank) &&
!IsAssumedShape(assumed) &&
!evaluate::IsAssumedRank(assumed)) {
messages.Say( // C711
"Assumed-type '%s' must be either assumed shape or assumed rank to be associated with assumed rank %s"_err_en_US,
assumed.name(), dummyName);
}
}
}
},
[&](const characteristics::DummyProcedure &dummy) {
if (CheckActualArgForLabel(arg)) {
CheckProcedureArg(arg, proc, dummy, dummyName, context,
ignoreImplicitVsExplicit);
}
},
[&](const characteristics::AlternateReturn &) {
// All semantic checking is done elsewhere
},
},
dummy.u);
}
static void RearrangeArguments(const characteristics::Procedure &proc,
evaluate::ActualArguments &actuals, parser::ContextualMessages &messages) {
CHECK(proc.HasExplicitInterface());
if (actuals.size() < proc.dummyArguments.size()) {
actuals.resize(proc.dummyArguments.size());
} else if (actuals.size() > proc.dummyArguments.size()) {
messages.Say(
"Too many actual arguments (%zd) passed to procedure that expects only %zd"_err_en_US,
actuals.size(), proc.dummyArguments.size());
}
std::map<std::string, evaluate::ActualArgument> kwArgs;
bool anyKeyword{false};
int which{1};
for (auto &x : actuals) {
if (!x) {
} else if (x->keyword()) {
auto emplaced{
kwArgs.try_emplace(x->keyword()->ToString(), std::move(*x))};
if (!emplaced.second) {
messages.Say(*x->keyword(),
"Argument keyword '%s=' appears on more than one effective argument in this procedure reference"_err_en_US,
*x->keyword());
}
x.reset();
anyKeyword = true;
} else if (anyKeyword) {
messages.Say(x ? x->sourceLocation() : std::nullopt,
"Actual argument #%d without a keyword may not follow any actual argument with a keyword"_err_en_US,
which);
}
++which;
}
if (!kwArgs.empty()) {
int index{0};
for (const auto &dummy : proc.dummyArguments) {
if (!dummy.name.empty()) {
auto iter{kwArgs.find(dummy.name)};
if (iter != kwArgs.end()) {
evaluate::ActualArgument &x{iter->second};
if (actuals[index]) {
messages.Say(*x.keyword(),
"Keyword argument '%s=' has already been specified positionally (#%d) in this procedure reference"_err_en_US,
*x.keyword(), index + 1);
} else {
actuals[index] = std::move(x);
}
kwArgs.erase(iter);
}
}
++index;
}
for (auto &bad : kwArgs) {
evaluate::ActualArgument &x{bad.second};
messages.Say(*x.keyword(),
"Argument keyword '%s=' is not recognized for this procedure reference"_err_en_US,
*x.keyword());
}
}
}
// 15.8.1(3) -- In a reference to an elemental procedure, if any argument is an
// array, each actual argument that corresponds to an INTENT(OUT) or
// INTENT(INOUT) dummy argument shall be an array. The actual argument to an
// ELEMENTAL procedure must conform.
static bool CheckElementalConformance(parser::ContextualMessages &messages,
const characteristics::Procedure &proc, evaluate::ActualArguments &actuals,
evaluate::FoldingContext &context) {
std::optional<evaluate::Shape> shape;
std::string shapeName;
int index{0};
bool hasArrayArg{false};
for (const auto &arg : actuals) {
if (arg && !arg->isAlternateReturn() && arg->Rank() > 0) {
hasArrayArg = true;
break;
}
}
for (const auto &arg : actuals) {
const auto &dummy{proc.dummyArguments.at(index++)};
if (arg) {
if (const auto *expr{arg->UnwrapExpr()}) {
if (auto argShape{evaluate::GetShape(context, *expr)}) {
if (GetRank(*argShape) > 0) {
std::string argName{"actual argument ("s + expr->AsFortran() +
") corresponding to dummy argument #" + std::to_string(index) +
" ('" + dummy.name + "')"};
if (shape) {
auto tristate{evaluate::CheckConformance(messages, *shape,
*argShape, evaluate::CheckConformanceFlags::None,
shapeName.c_str(), argName.c_str())};
if (tristate && !*tristate) {
return false;
}
} else {
shape = std::move(argShape);
shapeName = argName;
}
} else if ((dummy.GetIntent() == common::Intent::Out ||
dummy.GetIntent() == common::Intent::InOut) &&
hasArrayArg) {
messages.Say(
"In an elemental procedure reference with at least one array argument, actual argument %s that corresponds to an INTENT(OUT) or INTENT(INOUT) dummy argument must be an array"_err_en_US,
expr->AsFortran());
}
}
}
}
}
return true;
}
// ASSOCIATED (16.9.16)
static void CheckAssociated(evaluate::ActualArguments &arguments,
SemanticsContext &semanticsContext, const Scope *scope) {
evaluate::FoldingContext &foldingContext{semanticsContext.foldingContext()};
parser::ContextualMessages &messages{foldingContext.messages()};
bool ok{true};
if (arguments.size() < 2) {
return;
}
if (const auto &pointerArg{arguments[0]}) {
if (const auto *pointerExpr{pointerArg->UnwrapExpr()}) {
if (!IsPointer(*pointerExpr)) {
messages.Say(pointerArg->sourceLocation(),
"POINTER= argument of ASSOCIATED() must be a pointer"_err_en_US);
return;
}
if (const auto &targetArg{arguments[1]}) {
// The standard requires that the TARGET= argument, when present,
// be a valid RHS for a pointer assignment that has the POINTER=
// argument as its LHS. Some popular compilers misinterpret this
// requirement more strongly than necessary, and actually validate
// the POINTER= argument as if it were serving as the LHS of a pointer
// assignment. This, perhaps unintentionally, excludes function
// results, including NULL(), from being used there, as well as
// INTENT(IN) dummy pointers. Detect these conditions and emit
// portability warnings.
if (semanticsContext.ShouldWarn(common::UsageWarning::Portability)) {
if (!evaluate::ExtractDataRef(*pointerExpr) &&
!evaluate::IsProcedurePointer(*pointerExpr)) {
messages.Say(pointerArg->sourceLocation(),
"POINTER= argument of ASSOCIATED() is required by some other compilers to be a pointer"_port_en_US);
} else if (scope && !evaluate::UnwrapProcedureRef(*pointerExpr)) {
if (auto whyNot{WhyNotDefinable(
pointerArg->sourceLocation().value_or(messages.at()),
*scope,
DefinabilityFlags{DefinabilityFlag::PointerDefinition,
DefinabilityFlag::DoNotNoteDefinition},
*pointerExpr)}) {
if (whyNot->IsFatal()) {
if (auto *msg{messages.Say(pointerArg->sourceLocation(),
"POINTER= argument of ASSOCIATED() is required by some other compilers to be a valid left-hand side of a pointer assignment statement"_port_en_US)}) {
msg->Attach(std::move(
whyNot->set_severity(parser::Severity::Because)));
}
} else {
messages.Say(std::move(*whyNot));
}
}
}
}
if (const auto *targetExpr{targetArg->UnwrapExpr()}) {
if (IsProcedurePointer(*pointerExpr) &&
!IsBareNullPointer(pointerExpr)) { // POINTER= is a procedure
if (auto pointerProc{characteristics::Procedure::Characterize(
*pointerExpr, foldingContext)}) {
if (IsBareNullPointer(targetExpr)) {
} else if (IsProcedurePointerTarget(*targetExpr)) {
if (auto targetProc{characteristics::Procedure::Characterize(
*targetExpr, foldingContext)}) {
bool isCall{!!UnwrapProcedureRef(*targetExpr)};
std::string whyNot;
std::optional<std::string> warning;
const auto *targetProcDesignator{
evaluate::UnwrapExpr<evaluate::ProcedureDesignator>(
*targetExpr)};
const evaluate::SpecificIntrinsic *specificIntrinsic{
targetProcDesignator
? targetProcDesignator->GetSpecificIntrinsic()
: nullptr};
std::optional<parser::MessageFixedText> msg{
CheckProcCompatibility(isCall, pointerProc, &*targetProc,
specificIntrinsic, whyNot, warning,
/*ignoreImplicitVsExplicit=*/false)};
if (!msg && warning &&
semanticsContext.ShouldWarn(
common::UsageWarning::ProcDummyArgShapes)) {
msg =
"Procedures '%s' and '%s' may not be completely compatible: %s"_warn_en_US;
whyNot = std::move(*warning);
} else if (msg &&
msg->severity() != parser::Severity::Error &&
!semanticsContext.ShouldWarn(
common::UsageWarning::ProcPointerCompatibility)) {
msg.reset();
}
if (msg) {
msg->set_severity(parser::Severity::Warning);
messages.Say(std::move(*msg),
"pointer '" + pointerExpr->AsFortran() + "'",
targetExpr->AsFortran(), whyNot);
}
}
} else if (!IsNullProcedurePointer(*targetExpr)) {
messages.Say(
"POINTER= argument '%s' is a procedure pointer but the TARGET= argument '%s' is not a procedure or procedure pointer"_err_en_US,
pointerExpr->AsFortran(), targetExpr->AsFortran());
}
}
} else if (IsVariable(*targetExpr) || IsNullPointer(*targetExpr)) {
// Object pointer and target
if (ExtractDataRef(*targetExpr)) {
if (SymbolVector symbols{GetSymbolVector(*targetExpr)};
!evaluate::GetLastTarget(symbols)) {
parser::Message *msg{messages.Say(targetArg->sourceLocation(),
"TARGET= argument '%s' must have either the POINTER or the TARGET attribute"_err_en_US,
targetExpr->AsFortran())};
for (SymbolRef ref : symbols) {
msg = evaluate::AttachDeclaration(msg, *ref);
}
} else if (HasVectorSubscript(*targetExpr) ||
ExtractCoarrayRef(*targetExpr)) {
messages.Say(targetArg->sourceLocation(),
"TARGET= argument '%s' may not have a vector subscript or coindexing"_err_en_US,
targetExpr->AsFortran());
}
}
if (const auto pointerType{pointerArg->GetType()}) {
if (const auto targetType{targetArg->GetType()}) {
ok = pointerType->IsTkCompatibleWith(*targetType);
}
}
} else {
messages.Say(
"POINTER= argument '%s' is an object pointer but the TARGET= argument '%s' is not a variable"_err_en_US,
pointerExpr->AsFortran(), targetExpr->AsFortran());
}
if (!IsAssumedRank(*pointerExpr)) {
if (IsAssumedRank(*targetExpr)) {
messages.Say(
"TARGET= argument '%s' may not be assumed-rank when POINTER= argument is not"_err_en_US,
pointerExpr->AsFortran());
} else if (pointerExpr->Rank() != targetExpr->Rank()) {
messages.Say(
"POINTER= argument and TARGET= argument have incompatible ranks %d and %d"_err_en_US,
pointerExpr->Rank(), targetExpr->Rank());
}
}
}
}
}
} else {
// No arguments to ASSOCIATED()
ok = false;
}
if (!ok) {
messages.Say(
"Arguments of ASSOCIATED() must be a pointer and an optional valid target"_err_en_US);
}
}
// IMAGE_INDEX (F'2023 16.9.107)
static void CheckImage_Index(evaluate::ActualArguments &arguments,
parser::ContextualMessages &messages) {
if (arguments[1] && arguments[0]) {
if (const auto subArrShape{
evaluate::GetShape(arguments[1]->UnwrapExpr())}) {
if (const auto *coarrayArgSymbol{UnwrapWholeSymbolOrComponentDataRef(
arguments[0]->UnwrapExpr())}) {
const auto coarrayArgCorank = coarrayArgSymbol->Corank();
if (const auto subArrSize = evaluate::ToInt64(*subArrShape->front())) {
if (subArrSize != coarrayArgCorank) {
messages.Say(arguments[1]->sourceLocation(),
"The size of 'SUB=' (%jd) for intrinsic 'image_index' must be equal to the corank of 'COARRAY=' (%d)"_err_en_US,
static_cast<std::int64_t>(*subArrSize), coarrayArgCorank);
}
}
}
}
}
}
// Ensure that any optional argument that might be absent at run time
// does not require data conversion.
static void CheckMaxMin(const characteristics::Procedure &proc,
evaluate::ActualArguments &arguments,
parser::ContextualMessages &messages) {
if (proc.functionResult) {
if (const auto *typeAndShape{proc.functionResult->GetTypeAndShape()}) {
for (std::size_t j{2}; j < arguments.size(); ++j) {
if (arguments[j]) {
if (const auto *expr{arguments[j]->UnwrapExpr()};
expr && evaluate::MayBePassedAsAbsentOptional(*expr)) {
if (auto thisType{expr->GetType()}) {
if (thisType->category() == TypeCategory::Character &&
typeAndShape->type().category() == TypeCategory::Character &&
thisType->kind() == typeAndShape->type().kind()) {
// don't care about lengths
} else if (*thisType != typeAndShape->type()) {
messages.Say(arguments[j]->sourceLocation(),
"An actual argument to MAX/MIN requiring data conversion may not be OPTIONAL, POINTER, or ALLOCATABLE"_err_en_US);
}
}
}
}
}
}
}
}
// MOVE_ALLOC (F'2023 16.9.147)
static void CheckMove_Alloc(evaluate::ActualArguments &arguments,
parser::ContextualMessages &messages) {
if (arguments.size() >= 1) {
evaluate::CheckForCoindexedObject(
messages, arguments[0], "move_alloc", "from");
}
if (arguments.size() >= 2) {
evaluate::CheckForCoindexedObject(
messages, arguments[1], "move_alloc", "to");
}
if (arguments.size() >= 3) {
evaluate::CheckForCoindexedObject(
messages, arguments[2], "move_alloc", "stat");
}
if (arguments.size() >= 4) {
evaluate::CheckForCoindexedObject(
messages, arguments[3], "move_alloc", "errmsg");
}
if (arguments.size() >= 2 && arguments[0] && arguments[1]) {
for (int j{0}; j < 2; ++j) {
if (const Symbol *
whole{UnwrapWholeSymbolOrComponentDataRef(arguments[j])};
!whole || !IsAllocatable(whole->GetUltimate())) {
messages.Say(*arguments[j]->sourceLocation(),
"Argument #%d to MOVE_ALLOC must be allocatable"_err_en_US, j + 1);
}
}
auto type0{arguments[0]->GetType()};
auto type1{arguments[1]->GetType()};
if (type0 && type1 && type0->IsPolymorphic() && !type1->IsPolymorphic()) {
messages.Say(arguments[1]->sourceLocation(),
"When MOVE_ALLOC(FROM=) is polymorphic, TO= must also be polymorphic"_err_en_US);
}
}
}
// PRESENT (F'2023 16.9.163)
static void CheckPresent(evaluate::ActualArguments &arguments,
parser::ContextualMessages &messages) {
if (arguments.size() == 1) {
if (const auto &arg{arguments[0]}; arg) {
const Symbol *symbol{nullptr};
if (const auto *expr{arg->UnwrapExpr()}) {
if (const auto *proc{
std::get_if<evaluate::ProcedureDesignator>(&expr->u)}) {
symbol = proc->GetSymbol();
} else {
symbol = evaluate::UnwrapWholeSymbolDataRef(*expr);
}
} else {
symbol = arg->GetAssumedTypeDummy();
}
if (!symbol ||
!symbol->GetUltimate().attrs().test(semantics::Attr::OPTIONAL)) {
messages.Say(arg ? arg->sourceLocation() : messages.at(),
"Argument of PRESENT() must be the name of a whole OPTIONAL dummy argument"_err_en_US);
}
}
}
}
// REDUCE (F'2023 16.9.173)
static void CheckReduce(
evaluate::ActualArguments &arguments, evaluate::FoldingContext &context) {
std::optional<evaluate::DynamicType> arrayType;
parser::ContextualMessages &messages{context.messages()};
if (const auto &array{arguments[0]}) {
arrayType = array->GetType();
if (!arguments[/*identity=*/4]) {
if (const auto *expr{array->UnwrapExpr()}) {
if (auto shape{
evaluate::GetShape(context, *expr, /*invariantOnly=*/false)}) {
if (const auto &dim{arguments[2]}; dim && array->Rank() > 1) {
// Partial reduction
auto dimVal{evaluate::ToInt64(dim->UnwrapExpr())};
std::int64_t j{0};
int zeroDims{0};
bool isSelectedDimEmpty{false};
for (const auto &extent : *shape) {
++j;
if (evaluate::ToInt64(extent) == 0) {
++zeroDims;
isSelectedDimEmpty |= dimVal && j == *dimVal;
}
}
if (isSelectedDimEmpty && zeroDims == 1) {
messages.Say(
"IDENTITY= must be present when DIM=%d and the array has zero extent on that dimension"_err_en_US,
static_cast<int>(dimVal.value()));
}
} else { // no DIM= or DIM=1 on a vector: total reduction
for (const auto &extent : *shape) {
if (evaluate::ToInt64(extent) == 0) {
messages.Say(
"IDENTITY= must be present when the array is empty and the result is scalar"_err_en_US);
break;
}
}
}
}
}
}
}
std::optional<characteristics::Procedure> procChars;
if (const auto &operation{arguments[1]}) {
if (const auto *expr{operation->UnwrapExpr()}) {
if (const auto *designator{
std::get_if<evaluate::ProcedureDesignator>(&expr->u)}) {
procChars = characteristics::Procedure::Characterize(
*designator, context, /*emitError=*/true);
} else if (const auto *ref{
std::get_if<evaluate::ProcedureRef>(&expr->u)}) {
procChars = characteristics::Procedure::Characterize(*ref, context);
}
}
}
const auto *result{
procChars ? procChars->functionResult->GetTypeAndShape() : nullptr};
if (!procChars || !procChars->IsPure() ||
procChars->dummyArguments.size() != 2 || !procChars->functionResult) {
messages.Say(
"OPERATION= argument of REDUCE() must be a pure function of two data arguments"_err_en_US);
} else if (procChars->attrs.test(characteristics::Procedure::Attr::BindC)) {
messages.Say(
"A BIND(C) OPERATION= argument of REDUCE() is not supported"_err_en_US);
} else if (!result || result->Rank() != 0) {
messages.Say(
"OPERATION= argument of REDUCE() must be a scalar function"_err_en_US);
} else if (result->type().IsPolymorphic() ||
(arrayType && !arrayType->IsTkLenCompatibleWith(result->type()))) {
messages.Say(
"OPERATION= argument of REDUCE() must have the same type as ARRAY="_err_en_US);
} else {
const characteristics::DummyDataObject *data[2]{};
for (int j{0}; j < 2; ++j) {
const auto &dummy{procChars->dummyArguments.at(j)};
data[j] = std::get_if<characteristics::DummyDataObject>(&dummy.u);
}
if (!data[0] || !data[1]) {
messages.Say(
"OPERATION= argument of REDUCE() may not have dummy procedure arguments"_err_en_US);
} else {
for (int j{0}; j < 2; ++j) {
if (data[j]->attrs.test(
characteristics::DummyDataObject::Attr::Optional) ||
data[j]->attrs.test(
characteristics::DummyDataObject::Attr::Allocatable) ||
data[j]->attrs.test(
characteristics::DummyDataObject::Attr::Pointer) ||
data[j]->type.Rank() != 0 || data[j]->type.type().IsPolymorphic() ||
(arrayType &&
!data[j]->type.type().IsTkCompatibleWith(*arrayType))) {
messages.Say(
"Arguments of OPERATION= procedure of REDUCE() must be both scalar of the same type as ARRAY=, and neither allocatable, pointer, polymorphic, nor optional"_err_en_US);
}
}
static constexpr characteristics::DummyDataObject::Attr attrs[]{
characteristics::DummyDataObject::Attr::Asynchronous,
characteristics::DummyDataObject::Attr::Target,
characteristics::DummyDataObject::Attr::Value,
};
for (std::size_t j{0}; j < sizeof attrs / sizeof *attrs; ++j) {
if (data[0]->attrs.test(attrs[j]) != data[1]->attrs.test(attrs[j])) {
messages.Say(
"If either argument of the OPERATION= procedure of REDUCE() has the ASYNCHRONOUS, TARGET, or VALUE attribute, both must have that attribute"_err_en_US);
break;
}
}
}
}
// When the MASK= is present and has no .TRUE. element, and there is
// no IDENTITY=, it's an error.
if (const auto &mask{arguments[3]}; mask && !arguments[/*identity*/ 4]) {
if (const auto *expr{mask->UnwrapExpr()}) {
if (const auto *logical{
std::get_if<evaluate::Expr<evaluate::SomeLogical>>(&expr->u)}) {
if (common::visit(
[](const auto &kindExpr) {
using KindExprType = std::decay_t<decltype(kindExpr)>;
using KindLogical = typename KindExprType::Result;
if (const auto *c{evaluate::UnwrapConstantValue<KindLogical>(
kindExpr)}) {
for (const auto &element : c->values()) {
if (element.IsTrue()) {
return false;
}
}
return true;
}
return false;
},
logical->u)) {
messages.Say(
"MASK= has no .TRUE. element, so IDENTITY= must be present"_err_en_US);
}
}
}
}
}
// TRANSFER (16.9.193)
static void CheckTransferOperandType(SemanticsContext &context,
const evaluate::DynamicType &type, const char *which) {
if (type.IsPolymorphic() &&
context.ShouldWarn(common::UsageWarning::PolymorphicTransferArg)) {
context.foldingContext().messages().Say(
"%s of TRANSFER is polymorphic"_warn_en_US, which);
} else if (!type.IsUnlimitedPolymorphic() &&
type.category() == TypeCategory::Derived &&
context.ShouldWarn(common::UsageWarning::PointerComponentTransferArg)) {
DirectComponentIterator directs{type.GetDerivedTypeSpec()};
if (auto bad{std::find_if(directs.begin(), directs.end(), IsDescriptor)};
bad != directs.end()) {
evaluate::SayWithDeclaration(context.foldingContext().messages(), *bad,
"%s of TRANSFER contains allocatable or pointer component %s"_warn_en_US,
which, bad.BuildResultDesignatorName());
}
}
}
static void CheckTransfer(evaluate::ActualArguments &arguments,
SemanticsContext &context, const Scope *scope) {
evaluate::FoldingContext &foldingContext{context.foldingContext()};
parser::ContextualMessages &messages{foldingContext.messages()};
if (arguments.size() >= 2) {
if (auto source{characteristics::TypeAndShape::Characterize(
arguments[0], foldingContext)}) {
CheckTransferOperandType(context, source->type(), "Source");
if (auto mold{characteristics::TypeAndShape::Characterize(
arguments[1], foldingContext)}) {
CheckTransferOperandType(context, mold->type(), "Mold");
if (mold->Rank() > 0 &&
evaluate::ToInt64(
evaluate::Fold(foldingContext,
mold->MeasureElementSizeInBytes(foldingContext, false)))
.value_or(1) == 0) {
if (auto sourceSize{evaluate::ToInt64(evaluate::Fold(foldingContext,
source->MeasureSizeInBytes(foldingContext)))}) {
if (*sourceSize > 0) {
messages.Say(
"Element size of MOLD= array may not be zero when SOURCE= is not empty"_err_en_US);
}
} else if (context.ShouldWarn(common::UsageWarning::VoidMold)) {
messages.Say(
"Element size of MOLD= array may not be zero unless SOURCE= is empty"_warn_en_US);
}
}
}
}
if (arguments.size() > 2) { // SIZE=
if (const Symbol *
whole{UnwrapWholeSymbolOrComponentDataRef(arguments[2])}) {
if (IsOptional(*whole)) {
messages.Say(
"SIZE= argument may not be the optional dummy argument '%s'"_err_en_US,
whole->name());
} else if (context.ShouldWarn(
common::UsageWarning::TransferSizePresence) &&
IsAllocatableOrObjectPointer(whole)) {
messages.Say(
"SIZE= argument that is allocatable or pointer must be present at execution; parenthesize to silence this warning"_warn_en_US);
}
}
}
}
}
static void CheckSpecificIntrinsic(const characteristics::Procedure &proc,
evaluate::ActualArguments &arguments, SemanticsContext &context,
const Scope *scope, const evaluate::SpecificIntrinsic &intrinsic) {
if (intrinsic.name == "associated") {
CheckAssociated(arguments, context, scope);
} else if (intrinsic.name == "image_index") {
CheckImage_Index(arguments, context.foldingContext().messages());
} else if (intrinsic.name == "max" || intrinsic.name == "min") {
CheckMaxMin(proc, arguments, context.foldingContext().messages());
} else if (intrinsic.name == "move_alloc") {
CheckMove_Alloc(arguments, context.foldingContext().messages());
} else if (intrinsic.name == "present") {
CheckPresent(arguments, context.foldingContext().messages());
} else if (intrinsic.name == "reduce") {
CheckReduce(arguments, context.foldingContext());
} else if (intrinsic.name == "transfer") {
CheckTransfer(arguments, context, scope);
}
}
static parser::Messages CheckExplicitInterface(
const characteristics::Procedure &proc, evaluate::ActualArguments &actuals,
SemanticsContext &context, const Scope *scope,
const evaluate::SpecificIntrinsic *intrinsic,
bool allowActualArgumentConversions, bool extentErrors,
bool ignoreImplicitVsExplicit) {
evaluate::FoldingContext &foldingContext{context.foldingContext()};
parser::ContextualMessages &messages{foldingContext.messages()};
parser::Messages buffer;
auto restorer{messages.SetMessages(buffer)};
RearrangeArguments(proc, actuals, messages);
if (!buffer.empty()) {
return buffer;
}
int index{0};
for (auto &actual : actuals) {
const auto &dummy{proc.dummyArguments.at(index++)};
if (actual) {
CheckExplicitInterfaceArg(*actual, dummy, proc, context, scope, intrinsic,
allowActualArgumentConversions, extentErrors,
ignoreImplicitVsExplicit);
} else if (!dummy.IsOptional()) {
if (dummy.name.empty()) {
messages.Say(
"Dummy argument #%d is not OPTIONAL and is not associated with "
"an actual argument in this procedure reference"_err_en_US,
index);
} else {
messages.Say("Dummy argument '%s=' (#%d) is not OPTIONAL and is not "
"associated with an actual argument in this procedure "
"reference"_err_en_US,
dummy.name, index);
}
}
}
if (proc.IsElemental() && !buffer.AnyFatalError()) {
CheckElementalConformance(messages, proc, actuals, foldingContext);
}
if (intrinsic) {
CheckSpecificIntrinsic(proc, actuals, context, scope, *intrinsic);
}
return buffer;
}
bool CheckInterfaceForGeneric(const characteristics::Procedure &proc,
evaluate::ActualArguments &actuals, SemanticsContext &context,
bool allowActualArgumentConversions) {
return proc.HasExplicitInterface() &&
!CheckExplicitInterface(proc, actuals, context, nullptr, nullptr,
allowActualArgumentConversions, /*extentErrors=*/false,
/*ignoreImplicitVsExplicit=*/false)
.AnyFatalError();
}
bool CheckArgumentIsConstantExprInRange(
const evaluate::ActualArguments &actuals, int index, int lowerBound,
int upperBound, parser::ContextualMessages &messages) {
CHECK(index >= 0 && static_cast<unsigned>(index) < actuals.size());
const std::optional<evaluate::ActualArgument> &argOptional{actuals[index]};
if (!argOptional) {
DIE("Actual argument should have value");
return false;
}
const evaluate::ActualArgument &arg{argOptional.value()};
const evaluate::Expr<evaluate::SomeType> *argExpr{arg.UnwrapExpr()};
CHECK(argExpr != nullptr);
if (!IsConstantExpr(*argExpr)) {
messages.Say("Actual argument #%d must be a constant expression"_err_en_US,
index + 1);
return false;
}
// This does not imply that the kind of the argument is 8. The kind
// for the intrinsic's argument should have been check prior. This is just
// a conversion so that we can read the constant value.
auto scalarValue{evaluate::ToInt64(argExpr)};
CHECK(scalarValue.has_value());
if (*scalarValue < lowerBound || *scalarValue > upperBound) {
messages.Say(
"Argument #%d must be a constant expression in range %d to %d"_err_en_US,
index + 1, lowerBound, upperBound);
return false;
}
return true;
}
bool CheckPPCIntrinsic(const Symbol &generic, const Symbol &specific,
const evaluate::ActualArguments &actuals,
evaluate::FoldingContext &context) {
parser::ContextualMessages &messages{context.messages()};
if (specific.name() == "__ppc_mtfsf") {
return CheckArgumentIsConstantExprInRange(actuals, 0, 0, 7, messages);
}
if (specific.name() == "__ppc_mtfsfi") {
return CheckArgumentIsConstantExprInRange(actuals, 0, 0, 7, messages) &&
CheckArgumentIsConstantExprInRange(actuals, 1, 0, 15, messages);
}
if (specific.name().ToString().compare(0, 14, "__ppc_vec_sld_") == 0) {
return CheckArgumentIsConstantExprInRange(actuals, 2, 0, 15, messages);
}
if (specific.name().ToString().compare(0, 15, "__ppc_vec_sldw_") == 0) {
return CheckArgumentIsConstantExprInRange(actuals, 2, 0, 3, messages);
}
if (specific.name().ToString().compare(0, 14, "__ppc_vec_ctf_") == 0) {
return CheckArgumentIsConstantExprInRange(actuals, 1, 0, 31, messages);
}
if (specific.name().ToString().compare(0, 16, "__ppc_vec_permi_") == 0) {
return CheckArgumentIsConstantExprInRange(actuals, 2, 0, 3, messages);
}
if (specific.name().ToString().compare(0, 21, "__ppc_vec_splat_s32__") == 0) {
return CheckArgumentIsConstantExprInRange(actuals, 0, -16, 15, messages);
}
if (specific.name().ToString().compare(0, 16, "__ppc_vec_splat_") == 0) {
// The value of arg2 in vec_splat must be a constant expression that is
// greater than or equal to 0, and less than the number of elements in arg1.
auto *expr{actuals[0].value().UnwrapExpr()};
auto type{characteristics::TypeAndShape::Characterize(*expr, context)};
assert(type && "unknown type");
const auto *derived{evaluate::GetDerivedTypeSpec(type.value().type())};
if (derived && derived->IsVectorType()) {
for (const auto &pair : derived->parameters()) {
if (pair.first == "element_kind") {
auto vecElemKind{Fortran::evaluate::ToInt64(pair.second.GetExplicit())
.value_or(0)};
auto numElem{vecElemKind == 0 ? 0 : (16 / vecElemKind)};
return CheckArgumentIsConstantExprInRange(
actuals, 1, 0, numElem - 1, messages);
}
}
} else
assert(false && "vector type is expected");
}
return false;
}
bool CheckArguments(const characteristics::Procedure &proc,
evaluate::ActualArguments &actuals, SemanticsContext &context,
const Scope &scope, bool treatingExternalAsImplicit,
bool ignoreImplicitVsExplicit,
const evaluate::SpecificIntrinsic *intrinsic) {
bool explicitInterface{proc.HasExplicitInterface()};
evaluate::FoldingContext foldingContext{context.foldingContext()};
parser::ContextualMessages &messages{foldingContext.messages()};
bool allowArgumentConversions{true};
if (!explicitInterface || treatingExternalAsImplicit) {
parser::Messages buffer;
{
auto restorer{messages.SetMessages(buffer)};
for (auto &actual : actuals) {
if (actual) {
CheckImplicitInterfaceArg(*actual, messages, context);
}
}
}
if (!buffer.empty()) {
if (auto *msgs{messages.messages()}) {
msgs->Annex(std::move(buffer));
}
return false; // don't pile on
}
allowArgumentConversions = false;
}
if (explicitInterface) {
auto buffer{CheckExplicitInterface(proc, actuals, context, &scope,
intrinsic, allowArgumentConversions,
/*extentErrors=*/true, ignoreImplicitVsExplicit)};
if (!buffer.empty()) {
if (treatingExternalAsImplicit) {
if (context.ShouldWarn(
common::UsageWarning::KnownBadImplicitInterface)) {
if (auto *msg{messages.Say(
"If the procedure's interface were explicit, this reference would be in error"_warn_en_US)}) {
buffer.AttachTo(*msg, parser::Severity::Because);
}
} else {
buffer.clear();
}
}
if (auto *msgs{messages.messages()}) {
msgs->Annex(std::move(buffer));
}
return false;
}
}
return true;
}
} // namespace Fortran::semantics
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