791 lines
33 KiB
C++
791 lines
33 KiB
C++
//===-- lib/Semantics/check-call.cpp --------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "check-call.h"
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#include "pointer-assignment.h"
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#include "flang/Evaluate/characteristics.h"
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#include "flang/Evaluate/check-expression.h"
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#include "flang/Evaluate/shape.h"
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#include "flang/Evaluate/tools.h"
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#include "flang/Parser/characters.h"
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#include "flang/Parser/message.h"
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#include "flang/Semantics/scope.h"
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#include "flang/Semantics/tools.h"
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#include <map>
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#include <string>
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using namespace Fortran::parser::literals;
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namespace characteristics = Fortran::evaluate::characteristics;
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namespace Fortran::semantics {
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static void CheckImplicitInterfaceArg(
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evaluate::ActualArgument &arg, parser::ContextualMessages &messages) {
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if (auto kw{arg.keyword()}) {
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messages.Say(*kw,
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"Keyword '%s=' may not appear in a reference to a procedure with an implicit interface"_err_en_US,
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*kw);
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}
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if (auto type{arg.GetType()}) {
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if (type->IsAssumedType()) {
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messages.Say(
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"Assumed type argument requires an explicit interface"_err_en_US);
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} else if (type->IsPolymorphic()) {
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messages.Say(
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"Polymorphic argument requires an explicit interface"_err_en_US);
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} else if (const DerivedTypeSpec * derived{GetDerivedTypeSpec(type)}) {
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if (!derived->parameters().empty()) {
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messages.Say(
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"Parameterized derived type argument requires an explicit interface"_err_en_US);
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}
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}
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}
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if (const auto *expr{arg.UnwrapExpr()}) {
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if (auto named{evaluate::ExtractNamedEntity(*expr)}) {
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const Symbol &symbol{named->GetLastSymbol()};
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if (symbol.Corank() > 0) {
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messages.Say(
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"Coarray argument requires an explicit interface"_err_en_US);
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}
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if (const auto *details{symbol.detailsIf<ObjectEntityDetails>()}) {
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if (details->IsAssumedRank()) {
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messages.Say(
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"Assumed rank argument requires an explicit interface"_err_en_US);
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}
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}
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if (symbol.attrs().test(Attr::ASYNCHRONOUS)) {
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messages.Say(
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"ASYNCHRONOUS argument requires an explicit interface"_err_en_US);
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}
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if (symbol.attrs().test(Attr::VOLATILE)) {
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messages.Say(
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"VOLATILE argument requires an explicit interface"_err_en_US);
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}
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}
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}
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}
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// When scalar CHARACTER actual arguments are known to be short,
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// we extend them on the right with spaces and a warning.
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static void PadShortCharacterActual(evaluate::Expr<evaluate::SomeType> &actual,
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const characteristics::TypeAndShape &dummyType,
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characteristics::TypeAndShape &actualType,
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evaluate::FoldingContext &context, parser::ContextualMessages &messages) {
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if (dummyType.type().category() == TypeCategory::Character &&
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actualType.type().category() == TypeCategory::Character &&
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dummyType.type().kind() == actualType.type().kind() &&
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GetRank(actualType.shape()) == 0) {
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if (dummyType.LEN() && actualType.LEN()) {
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auto dummyLength{ToInt64(Fold(context, common::Clone(*dummyType.LEN())))};
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auto actualLength{
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ToInt64(Fold(context, common::Clone(*actualType.LEN())))};
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if (dummyLength && actualLength && *actualLength < *dummyLength) {
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messages.Say(
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"Actual length '%jd' is less than expected length '%jd'"_en_US,
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*actualLength, *dummyLength);
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auto converted{ConvertToType(dummyType.type(), std::move(actual))};
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CHECK(converted);
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actual = std::move(*converted);
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actualType.set_LEN(SubscriptIntExpr{*dummyLength});
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}
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}
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}
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}
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// Automatic conversion of different-kind INTEGER scalar actual
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// argument expressions (not variables) to INTEGER scalar dummies.
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// We return nonstandard INTEGER(8) results from intrinsic functions
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// like SIZE() by default in order to facilitate the use of large
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// arrays. Emit a warning when downconverting.
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static void ConvertIntegerActual(evaluate::Expr<evaluate::SomeType> &actual,
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const characteristics::TypeAndShape &dummyType,
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characteristics::TypeAndShape &actualType,
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parser::ContextualMessages &messages) {
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if (dummyType.type().category() == TypeCategory::Integer &&
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actualType.type().category() == TypeCategory::Integer &&
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dummyType.type().kind() != actualType.type().kind() &&
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GetRank(dummyType.shape()) == 0 && GetRank(actualType.shape()) == 0 &&
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!evaluate::IsVariable(actual)) {
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auto converted{
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evaluate::ConvertToType(dummyType.type(), std::move(actual))};
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CHECK(converted);
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actual = std::move(*converted);
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if (dummyType.type().kind() < actualType.type().kind()) {
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messages.Say(
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"Actual argument scalar expression of type INTEGER(%d) was converted to smaller dummy argument type INTEGER(%d)"_en_US,
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actualType.type().kind(), dummyType.type().kind());
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}
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actualType = dummyType;
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}
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}
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static bool DefersSameTypeParameters(
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const DerivedTypeSpec &actual, const DerivedTypeSpec &dummy) {
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for (const auto &pair : actual.parameters()) {
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const ParamValue &actualValue{pair.second};
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const ParamValue *dummyValue{dummy.FindParameter(pair.first)};
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if (!dummyValue || (actualValue.isDeferred() != dummyValue->isDeferred())) {
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return false;
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}
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}
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return true;
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}
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static void CheckExplicitDataArg(const characteristics::DummyDataObject &dummy,
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const std::string &dummyName, evaluate::Expr<evaluate::SomeType> &actual,
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characteristics::TypeAndShape &actualType, bool isElemental,
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bool actualIsArrayElement, evaluate::FoldingContext &context,
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const Scope *scope, const evaluate::SpecificIntrinsic *intrinsic) {
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// Basic type & rank checking
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parser::ContextualMessages &messages{context.messages()};
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PadShortCharacterActual(actual, dummy.type, actualType, context, messages);
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ConvertIntegerActual(actual, dummy.type, actualType, messages);
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bool typesCompatible{dummy.type.type().IsTkCompatibleWith(actualType.type())};
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if (typesCompatible) {
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if (isElemental) {
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} else if (dummy.type.attrs().test(
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characteristics::TypeAndShape::Attr::AssumedRank)) {
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} else if (!dummy.type.attrs().test(
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characteristics::TypeAndShape::Attr::AssumedShape) &&
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(actualType.Rank() > 0 || actualIsArrayElement)) {
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// Sequence association (15.5.2.11) applies -- rank need not match
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// if the actual argument is an array or array element designator.
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} else {
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// Let CheckConformance accept scalars; storage association
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// cases are checked here below.
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CheckConformance(messages, dummy.type.shape(), actualType.shape(),
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"dummy argument", "actual argument", true, true);
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}
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} else {
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const auto &len{actualType.LEN()};
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messages.Say(
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"Actual argument type '%s' is not compatible with dummy argument type '%s'"_err_en_US,
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actualType.type().AsFortran(len ? len->AsFortran() : ""),
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dummy.type.type().AsFortran());
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}
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bool actualIsPolymorphic{actualType.type().IsPolymorphic()};
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bool dummyIsPolymorphic{dummy.type.type().IsPolymorphic()};
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bool actualIsCoindexed{ExtractCoarrayRef(actual).has_value()};
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bool actualIsAssumedSize{actualType.attrs().test(
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characteristics::TypeAndShape::Attr::AssumedSize)};
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bool dummyIsAssumedSize{dummy.type.attrs().test(
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characteristics::TypeAndShape::Attr::AssumedSize)};
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bool dummyIsAsynchronous{
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dummy.attrs.test(characteristics::DummyDataObject::Attr::Asynchronous)};
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bool dummyIsVolatile{
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dummy.attrs.test(characteristics::DummyDataObject::Attr::Volatile)};
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bool dummyIsValue{
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dummy.attrs.test(characteristics::DummyDataObject::Attr::Value)};
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if (actualIsPolymorphic && dummyIsPolymorphic &&
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actualIsCoindexed) { // 15.5.2.4(2)
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messages.Say(
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"Coindexed polymorphic object may not be associated with a polymorphic %s"_err_en_US,
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dummyName);
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}
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if (actualIsPolymorphic && !dummyIsPolymorphic &&
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actualIsAssumedSize) { // 15.5.2.4(2)
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messages.Say(
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"Assumed-size polymorphic array may not be associated with a monomorphic %s"_err_en_US,
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dummyName);
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}
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// Derived type actual argument checks
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const Symbol *actualFirstSymbol{evaluate::GetFirstSymbol(actual)};
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bool actualIsAsynchronous{
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actualFirstSymbol && actualFirstSymbol->attrs().test(Attr::ASYNCHRONOUS)};
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bool actualIsVolatile{
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actualFirstSymbol && actualFirstSymbol->attrs().test(Attr::VOLATILE)};
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if (const auto *derived{evaluate::GetDerivedTypeSpec(actualType.type())}) {
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if (dummy.type.type().IsAssumedType()) {
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if (!derived->parameters().empty()) { // 15.5.2.4(2)
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messages.Say(
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"Actual argument associated with TYPE(*) %s may not have a parameterized derived type"_err_en_US,
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dummyName);
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}
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if (const Symbol *
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tbp{FindImmediateComponent(*derived, [](const Symbol &symbol) {
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return symbol.has<ProcBindingDetails>();
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})}) { // 15.5.2.4(2)
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evaluate::SayWithDeclaration(messages, *tbp,
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"Actual argument associated with TYPE(*) %s may not have type-bound procedure '%s'"_err_en_US,
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dummyName, tbp->name());
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}
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const auto &finals{
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derived->typeSymbol().get<DerivedTypeDetails>().finals()};
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if (!finals.empty()) { // 15.5.2.4(2)
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if (auto *msg{messages.Say(
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"Actual argument associated with TYPE(*) %s may not have derived type '%s' with FINAL subroutine '%s'"_err_en_US,
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dummyName, derived->typeSymbol().name(),
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finals.begin()->first)}) {
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msg->Attach(finals.begin()->first,
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"FINAL subroutine '%s' in derived type '%s'"_en_US,
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finals.begin()->first, derived->typeSymbol().name());
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}
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}
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}
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if (actualIsCoindexed) {
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if (dummy.intent != common::Intent::In && !dummyIsValue) {
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if (auto bad{
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FindAllocatableUltimateComponent(*derived)}) { // 15.5.2.4(6)
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evaluate::SayWithDeclaration(messages, *bad,
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"Coindexed actual argument with ALLOCATABLE ultimate component '%s' must be associated with a %s with VALUE or INTENT(IN) attributes"_err_en_US,
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bad.BuildResultDesignatorName(), dummyName);
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}
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}
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if (auto coarrayRef{evaluate::ExtractCoarrayRef(actual)}) { // C1537
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const Symbol &coarray{coarrayRef->GetLastSymbol()};
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if (const DeclTypeSpec * type{coarray.GetType()}) {
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if (const DerivedTypeSpec * derived{type->AsDerived()}) {
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if (auto bad{semantics::FindPointerUltimateComponent(*derived)}) {
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evaluate::SayWithDeclaration(messages, coarray,
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"Coindexed object '%s' with POINTER ultimate component '%s' cannot be associated with %s"_err_en_US,
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coarray.name(), bad.BuildResultDesignatorName(), dummyName);
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}
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}
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}
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}
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}
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if (actualIsVolatile != dummyIsVolatile) { // 15.5.2.4(22)
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if (auto bad{semantics::FindCoarrayUltimateComponent(*derived)}) {
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evaluate::SayWithDeclaration(messages, *bad,
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"VOLATILE attribute must match for %s when actual argument has a coarray ultimate component '%s'"_err_en_US,
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dummyName, bad.BuildResultDesignatorName());
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}
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}
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}
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// Rank and shape checks
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const auto *actualLastSymbol{evaluate::GetLastSymbol(actual)};
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if (actualLastSymbol) {
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actualLastSymbol = &ResolveAssociations(*actualLastSymbol);
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}
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const ObjectEntityDetails *actualLastObject{actualLastSymbol
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? actualLastSymbol->detailsIf<ObjectEntityDetails>()
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: nullptr};
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int actualRank{evaluate::GetRank(actualType.shape())};
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bool actualIsPointer{(actualLastSymbol && IsPointer(*actualLastSymbol)) ||
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evaluate::IsNullPointer(actual)};
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if (dummy.type.attrs().test(
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characteristics::TypeAndShape::Attr::AssumedShape)) {
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// 15.5.2.4(16)
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if (actualRank == 0) {
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messages.Say(
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"Scalar actual argument may not be associated with assumed-shape %s"_err_en_US,
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dummyName);
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}
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if (actualIsAssumedSize && actualLastSymbol) {
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evaluate::SayWithDeclaration(messages, *actualLastSymbol,
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"Assumed-size array may not be associated with assumed-shape %s"_err_en_US,
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dummyName);
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}
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} else if (actualRank == 0 && dummy.type.Rank() > 0) {
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// Actual is scalar, dummy is an array. 15.5.2.4(14), 15.5.2.11
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if (actualIsCoindexed) {
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messages.Say(
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"Coindexed scalar actual argument must be associated with a scalar %s"_err_en_US,
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dummyName);
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}
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if (actualLastSymbol && actualLastSymbol->Rank() == 0 &&
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!(dummy.type.type().IsAssumedType() && dummyIsAssumedSize)) {
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messages.Say(
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"Whole scalar actual argument may not be associated with a %s array"_err_en_US,
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dummyName);
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}
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if (actualIsPolymorphic) {
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messages.Say(
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"Polymorphic scalar may not be associated with a %s array"_err_en_US,
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dummyName);
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}
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if (actualIsPointer) {
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messages.Say(
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"Scalar POINTER target may not be associated with a %s array"_err_en_US,
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dummyName);
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}
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if (actualLastObject && actualLastObject->IsAssumedShape()) {
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messages.Say(
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"Element of assumed-shape array may not be associated with a %s array"_err_en_US,
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dummyName);
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}
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}
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if (actualLastObject && actualLastObject->IsCoarray() &&
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IsAllocatable(*actualLastSymbol) && dummy.intent == common::Intent::Out &&
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!(intrinsic &&
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evaluate::AcceptsIntentOutAllocatableCoarray(
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intrinsic->name))) { // C846
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messages.Say(
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"ALLOCATABLE coarray '%s' may not be associated with INTENT(OUT) %s"_err_en_US,
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actualLastSymbol->name(), dummyName);
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}
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// Definability
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const char *reason{nullptr};
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if (dummy.intent == common::Intent::Out) {
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reason = "INTENT(OUT)";
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} else if (dummy.intent == common::Intent::InOut) {
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reason = "INTENT(IN OUT)";
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} else if (dummyIsAsynchronous) {
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reason = "ASYNCHRONOUS";
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} else if (dummyIsVolatile) {
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reason = "VOLATILE";
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}
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if (reason && scope) {
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bool vectorSubscriptIsOk{isElemental || dummyIsValue}; // 15.5.2.4(21)
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if (auto why{WhyNotModifiable(
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messages.at(), actual, *scope, vectorSubscriptIsOk)}) {
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if (auto *msg{messages.Say(
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"Actual argument associated with %s %s must be definable"_err_en_US, // C1158
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reason, dummyName)}) {
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msg->Attach(*why);
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}
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}
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}
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// Cases when temporaries might be needed but must not be permitted.
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bool dummyIsPointer{
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dummy.attrs.test(characteristics::DummyDataObject::Attr::Pointer)};
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bool dummyIsContiguous{
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dummy.attrs.test(characteristics::DummyDataObject::Attr::Contiguous)};
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bool actualIsContiguous{IsSimplyContiguous(actual, context)};
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bool dummyIsAssumedRank{dummy.type.attrs().test(
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characteristics::TypeAndShape::Attr::AssumedRank)};
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bool dummyIsAssumedShape{dummy.type.attrs().test(
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characteristics::TypeAndShape::Attr::AssumedShape)};
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if ((actualIsAsynchronous || actualIsVolatile) &&
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(dummyIsAsynchronous || dummyIsVolatile) && !dummyIsValue) {
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if (actualIsCoindexed) { // C1538
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messages.Say(
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"Coindexed ASYNCHRONOUS or VOLATILE actual argument may not be associated with %s with ASYNCHRONOUS or VOLATILE attributes unless VALUE"_err_en_US,
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dummyName);
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}
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if (actualRank > 0 && !actualIsContiguous) {
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if (dummyIsContiguous ||
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!(dummyIsAssumedShape || dummyIsAssumedRank ||
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(actualIsPointer && dummyIsPointer))) { // C1539 & C1540
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messages.Say(
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"ASYNCHRONOUS or VOLATILE actual argument that is not simply contiguous may not be associated with a contiguous %s"_err_en_US,
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dummyName);
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}
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}
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}
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// 15.5.2.6 -- dummy is ALLOCATABLE
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bool dummyIsAllocatable{
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dummy.attrs.test(characteristics::DummyDataObject::Attr::Allocatable)};
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bool actualIsAllocatable{
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actualLastSymbol && IsAllocatable(*actualLastSymbol)};
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if (dummyIsAllocatable) {
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if (!actualIsAllocatable) {
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messages.Say(
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"ALLOCATABLE %s must be associated with an ALLOCATABLE actual argument"_err_en_US,
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dummyName);
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}
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if (actualIsAllocatable && actualIsCoindexed &&
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dummy.intent != common::Intent::In) {
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messages.Say(
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"ALLOCATABLE %s must have INTENT(IN) to be associated with a coindexed actual argument"_err_en_US,
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dummyName);
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}
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if (!actualIsCoindexed && actualLastSymbol &&
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actualLastSymbol->Corank() != dummy.type.corank()) {
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messages.Say(
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"ALLOCATABLE %s has corank %d but actual argument has corank %d"_err_en_US,
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dummyName, dummy.type.corank(), actualLastSymbol->Corank());
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}
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}
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// 15.5.2.7 -- dummy is POINTER
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if (dummyIsPointer) {
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if (dummyIsContiguous && !actualIsContiguous) {
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messages.Say(
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"Actual argument associated with CONTIGUOUS POINTER %s must be simply contiguous"_err_en_US,
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dummyName);
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}
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if (!actualIsPointer) {
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if (dummy.intent == common::Intent::In) {
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semantics::CheckPointerAssignment(
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context, parser::CharBlock{}, dummyName, dummy, actual);
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} else {
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messages.Say(
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"Actual argument associated with POINTER %s must also be POINTER unless INTENT(IN)"_err_en_US,
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dummyName);
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}
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}
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}
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// 15.5.2.5 -- actual & dummy are both POINTER or both ALLOCATABLE
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if ((actualIsPointer && dummyIsPointer) ||
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(actualIsAllocatable && dummyIsAllocatable)) {
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bool actualIsUnlimited{actualType.type().IsUnlimitedPolymorphic()};
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bool dummyIsUnlimited{dummy.type.type().IsUnlimitedPolymorphic()};
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if (actualIsUnlimited != dummyIsUnlimited) {
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if (typesCompatible) {
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messages.Say(
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"If a POINTER or ALLOCATABLE dummy or actual argument is unlimited polymorphic, both must be so"_err_en_US);
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}
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} else if (dummyIsPolymorphic != actualIsPolymorphic) {
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if (dummy.intent == common::Intent::In && typesCompatible) {
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// extension: allow with warning, rule is only relevant for definables
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messages.Say(
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"If a POINTER or ALLOCATABLE dummy or actual argument is polymorphic, both should be so"_en_US);
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} else {
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messages.Say(
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"If a POINTER or ALLOCATABLE dummy or actual argument is polymorphic, both must be so"_err_en_US);
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}
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} else if (!actualIsUnlimited && typesCompatible) {
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if (!actualType.type().IsTkCompatibleWith(dummy.type.type())) {
|
|
if (dummy.intent == common::Intent::In) {
|
|
// extension: allow with warning, rule is only relevant for definables
|
|
messages.Say(
|
|
"POINTER or ALLOCATABLE dummy and actual arguments should have the same declared type and kind"_en_US);
|
|
} else {
|
|
messages.Say(
|
|
"POINTER or ALLOCATABLE dummy and actual arguments must have the same declared type and kind"_err_en_US);
|
|
}
|
|
}
|
|
if (const auto *derived{
|
|
evaluate::GetDerivedTypeSpec(actualType.type())}) {
|
|
if (!DefersSameTypeParameters(
|
|
*derived, *evaluate::GetDerivedTypeSpec(dummy.type.type()))) {
|
|
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 == dummy.type.Rank() && !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);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void CheckProcedureArg(evaluate::ActualArgument &arg,
|
|
const characteristics::DummyProcedure &proc, const std::string &dummyName,
|
|
evaluate::FoldingContext &context) {
|
|
parser::ContextualMessages &messages{context.messages()};
|
|
const characteristics::Procedure &interface{proc.procedure.value()};
|
|
if (const auto *expr{arg.UnwrapExpr()}) {
|
|
bool dummyIsPointer{
|
|
proc.attrs.test(characteristics::DummyProcedure::Attr::Pointer)};
|
|
const auto *argProcDesignator{
|
|
std::get_if<evaluate::ProcedureDesignator>(&expr->u)};
|
|
const auto *argProcSymbol{
|
|
argProcDesignator ? argProcDesignator->GetSymbol() : nullptr};
|
|
if (auto argChars{characteristics::DummyArgument::FromActual(
|
|
"actual argument", *expr, context)}) {
|
|
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.IsPure()) {
|
|
// 15.5.2.9(1): if dummy is not pure, actual need not be.
|
|
argInterface.attrs.reset(characteristics::Procedure::Attr::Pure);
|
|
}
|
|
if (interface.HasExplicitInterface()) {
|
|
if (interface != argInterface) {
|
|
// 15.5.2.9(1): Explicit interfaces must match
|
|
if (argInterface.HasExplicitInterface()) {
|
|
messages.Say(
|
|
"Actual procedure argument has interface incompatible with %s"_err_en_US,
|
|
dummyName);
|
|
return;
|
|
} else {
|
|
messages.Say(
|
|
"Actual procedure argument has an implicit interface "
|
|
"which is not known to be compatible with %s which has an "
|
|
"explcit interface"_err_en_US,
|
|
dummyName);
|
|
return;
|
|
}
|
|
}
|
|
} 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()) {
|
|
if (interface.functionResult != argInterface.functionResult) {
|
|
messages.Say(
|
|
"Actual argument function associated with procedure %s has incompatible result type"_err_en_US,
|
|
dummyName);
|
|
}
|
|
} 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 (!(dummyIsPointer && IsNullPointer(*expr))) {
|
|
messages.Say(
|
|
"Actual argument associated with procedure %s is not a procedure"_err_en_US,
|
|
dummyName);
|
|
}
|
|
}
|
|
if (interface.HasExplicitInterface()) {
|
|
if (dummyIsPointer) {
|
|
// 15.5.2.9(5) -- dummy procedure POINTER
|
|
// Interface compatibility has already been checked above by comparison.
|
|
if (proc.intent != common::Intent::In && !IsVariable(*expr)) {
|
|
messages.Say(
|
|
"Actual argument associated with procedure pointer %s must be a POINTER unless INTENT(IN)"_err_en_US,
|
|
dummyName);
|
|
}
|
|
} else { // 15.5.2.9(4) -- dummy procedure is not POINTER
|
|
if (!argProcDesignator) {
|
|
messages.Say(
|
|
"Actual argument associated with non-POINTER procedure %s must be a procedure (and not a procedure pointer)"_err_en_US,
|
|
dummyName);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
messages.Say(
|
|
"Assumed-type argument may not be forwarded as procedure %s"_err_en_US,
|
|
dummyName);
|
|
}
|
|
}
|
|
|
|
static void CheckExplicitInterfaceArg(evaluate::ActualArgument &arg,
|
|
const characteristics::DummyArgument &dummy,
|
|
const characteristics::Procedure &proc, evaluate::FoldingContext &context,
|
|
const Scope *scope, const evaluate::SpecificIntrinsic *intrinsic) {
|
|
auto &messages{context.messages()};
|
|
std::string dummyName{"dummy argument"};
|
|
if (!dummy.name.empty()) {
|
|
dummyName += " '"s + parser::ToLowerCaseLetters(dummy.name) + "='";
|
|
}
|
|
std::visit(
|
|
common::visitors{
|
|
[&](const characteristics::DummyDataObject &object) {
|
|
if (auto *expr{arg.UnwrapExpr()}) {
|
|
if (auto type{characteristics::TypeAndShape::Characterize(
|
|
*expr, context)}) {
|
|
arg.set_dummyIntent(object.intent);
|
|
bool isElemental{object.type.Rank() == 0 && proc.IsElemental()};
|
|
CheckExplicitDataArg(object, dummyName, *expr, *type,
|
|
isElemental, IsArrayElement(*expr), context, scope,
|
|
intrinsic);
|
|
} else if (object.type.type().IsTypelessIntrinsicArgument() &&
|
|
std::holds_alternative<evaluate::BOZLiteralConstant>(
|
|
expr->u)) {
|
|
// ok
|
|
} else if (object.type.type().IsTypelessIntrinsicArgument() &&
|
|
evaluate::IsNullPointer(*expr)) {
|
|
// ok, calling ASSOCIATED(NULL())
|
|
} 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 (const auto *details{
|
|
assumed.detailsIf<ObjectEntityDetails>()}) {
|
|
if (!(details->IsAssumedShape() || details->IsAssumedRank())) {
|
|
messages.Say( // C711
|
|
"Assumed-type '%s' must be either assumed shape or assumed rank to be associated with assumed-type %s"_err_en_US,
|
|
assumed.name(), dummyName);
|
|
}
|
|
}
|
|
}
|
|
},
|
|
[&](const characteristics::DummyProcedure &proc) {
|
|
CheckProcedureArg(arg, proc, dummyName, context);
|
|
},
|
|
[&](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;
|
|
for (auto &x : actuals) {
|
|
if (x && 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();
|
|
}
|
|
}
|
|
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());
|
|
}
|
|
}
|
|
}
|
|
|
|
static parser::Messages CheckExplicitInterface(
|
|
const characteristics::Procedure &proc, evaluate::ActualArguments &actuals,
|
|
const evaluate::FoldingContext &context, const Scope *scope,
|
|
const evaluate::SpecificIntrinsic *intrinsic) {
|
|
parser::Messages buffer;
|
|
parser::ContextualMessages messages{context.messages().at(), &buffer};
|
|
RearrangeArguments(proc, actuals, messages);
|
|
if (buffer.empty()) {
|
|
int index{0};
|
|
evaluate::FoldingContext localContext{context, messages};
|
|
for (auto &actual : actuals) {
|
|
const auto &dummy{proc.dummyArguments.at(index++)};
|
|
if (actual) {
|
|
CheckExplicitInterfaceArg(
|
|
*actual, dummy, proc, localContext, scope, intrinsic);
|
|
} 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);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return buffer;
|
|
}
|
|
|
|
parser::Messages CheckExplicitInterface(const characteristics::Procedure &proc,
|
|
evaluate::ActualArguments &actuals, const evaluate::FoldingContext &context,
|
|
const Scope &scope, const evaluate::SpecificIntrinsic *intrinsic) {
|
|
return CheckExplicitInterface(proc, actuals, context, &scope, intrinsic);
|
|
}
|
|
|
|
bool CheckInterfaceForGeneric(const characteristics::Procedure &proc,
|
|
evaluate::ActualArguments &actuals,
|
|
const evaluate::FoldingContext &context) {
|
|
return CheckExplicitInterface(proc, actuals, context, nullptr, nullptr)
|
|
.empty();
|
|
}
|
|
|
|
void CheckArguments(const characteristics::Procedure &proc,
|
|
evaluate::ActualArguments &actuals, evaluate::FoldingContext &context,
|
|
const Scope &scope, bool treatingExternalAsImplicit,
|
|
const evaluate::SpecificIntrinsic *intrinsic) {
|
|
bool explicitInterface{proc.HasExplicitInterface()};
|
|
if (explicitInterface) {
|
|
auto buffer{
|
|
CheckExplicitInterface(proc, actuals, context, scope, intrinsic)};
|
|
if (treatingExternalAsImplicit && !buffer.empty()) {
|
|
if (auto *msg{context.messages().Say(
|
|
"Warning: if the procedure's interface were explicit, this reference would be in error:"_en_US)}) {
|
|
buffer.AttachTo(*msg);
|
|
}
|
|
}
|
|
if (auto *msgs{context.messages().messages()}) {
|
|
msgs->Merge(std::move(buffer));
|
|
}
|
|
}
|
|
if (!explicitInterface || treatingExternalAsImplicit) {
|
|
for (auto &actual : actuals) {
|
|
if (actual) {
|
|
CheckImplicitInterfaceArg(*actual, context.messages());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} // namespace Fortran::semantics
|