6ceba01a4d
Emit warnings when CHARACTER lengths or array sizes of actual and dummy arguments mismatch in risky ways. Differential Revision: https://reviews.llvm.org/D154370
1437 lines
61 KiB
C++
1437 lines
61 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 "definable.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(evaluate::ActualArgument &arg,
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parser::ContextualMessages &messages, evaluate::FoldingContext &context) {
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auto restorer{
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messages.SetLocation(arg.sourceLocation().value_or(messages.at()))};
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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 (IsBOZLiteral(*expr)) {
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messages.Say("BOZ argument requires an explicit interface"_err_en_US);
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} else if (evaluate::IsNullPointer(*expr)) {
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messages.Say(
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"Null pointer argument requires an explicit interface"_err_en_US);
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} else 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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} else if (auto argChars{characteristics::DummyArgument::FromActual(
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"actual argument", *expr, context)}) {
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const auto *argProcDesignator{
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std::get_if<evaluate::ProcedureDesignator>(&expr->u)};
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if (const auto *argProcSymbol{
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argProcDesignator ? argProcDesignator->GetSymbol() : nullptr}) {
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if (!argChars->IsTypelessIntrinsicDummy() && argProcDesignator &&
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argProcDesignator->IsElemental()) { // C1533
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evaluate::SayWithDeclaration(messages, *argProcSymbol,
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"Non-intrinsic ELEMENTAL procedure '%s' may not be passed as an actual argument"_err_en_US,
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argProcSymbol->name());
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} else if (const auto *subp{argProcSymbol->GetUltimate()
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.detailsIf<SubprogramDetails>()}) {
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if (subp->stmtFunction()) {
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evaluate::SayWithDeclaration(messages, *argProcSymbol,
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"Statement function '%s' may not be passed as an actual argument"_err_en_US,
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argProcSymbol->name());
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}
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}
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}
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}
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}
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}
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// When a CHARACTER actual argument is known to be short,
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// we extend it on the right with spaces and a warning if
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// possible. When it is long, and not required to be equal,
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// the usage conforms to the standard and no warning is needed.
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static void CheckCharacterActual(evaluate::Expr<evaluate::SomeType> &actual,
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const characteristics::DummyDataObject &dummy,
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characteristics::TypeAndShape &actualType, SemanticsContext &context,
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parser::ContextualMessages &messages) {
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if (dummy.type.type().category() == TypeCategory::Character &&
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actualType.type().category() == TypeCategory::Character &&
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dummy.type.type().kind() == actualType.type().kind()) {
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if (dummy.type.LEN() && actualType.LEN()) {
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evaluate::FoldingContext &foldingContext{context.foldingContext()};
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auto dummyLength{
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ToInt64(Fold(foldingContext, common::Clone(*dummy.type.LEN())))};
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auto actualLength{
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ToInt64(Fold(foldingContext, common::Clone(*actualType.LEN())))};
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if (dummyLength && actualLength && *actualLength != *dummyLength) {
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if (dummy.attrs.test(
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characteristics::DummyDataObject::Attr::Allocatable) ||
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dummy.attrs.test(characteristics::DummyDataObject::Attr::Pointer) ||
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dummy.type.attrs().test(
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characteristics::TypeAndShape::Attr::AssumedRank) ||
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dummy.type.attrs().test(
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characteristics::TypeAndShape::Attr::AssumedShape)) {
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// See 15.5.2.4 paragraph 4., 15.5.2.5.
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messages.Say(
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"Actual argument variable length '%jd' does not match the expected length '%jd'"_err_en_US,
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*actualLength, *dummyLength);
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} else if (*actualLength < *dummyLength) {
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bool isVariable{evaluate::IsVariable(actual)};
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if (context.ShouldWarn(common::UsageWarning::ShortCharacterActual)) {
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if (isVariable) {
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messages.Say(
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"Actual argument variable length '%jd' is less than expected length '%jd'"_warn_en_US,
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*actualLength, *dummyLength);
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} else {
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messages.Say(
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"Actual argument expression length '%jd' is less than expected length '%jd'"_warn_en_US,
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*actualLength, *dummyLength);
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}
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}
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if (!isVariable) {
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auto converted{ConvertToType(dummy.type.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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}
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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)"_port_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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SemanticsContext &context, evaluate::FoldingContext &foldingContext,
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const Scope *scope, const evaluate::SpecificIntrinsic *intrinsic,
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bool allowActualArgumentConversions, bool extentErrors,
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const characteristics::Procedure &procedure) {
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// Basic type & rank checking
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parser::ContextualMessages &messages{foldingContext.messages()};
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CheckCharacterActual(actual, dummy, actualType, context, messages);
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bool dummyIsAllocatable{
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dummy.attrs.test(characteristics::DummyDataObject::Attr::Allocatable)};
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bool dummyIsPointer{
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dummy.attrs.test(characteristics::DummyDataObject::Attr::Pointer)};
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bool dummyIsAllocatableOrPointer{dummyIsAllocatable || dummyIsPointer};
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allowActualArgumentConversions &= !dummyIsAllocatableOrPointer;
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bool typesCompatibleWithIgnoreTKR{
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(dummy.ignoreTKR.test(common::IgnoreTKR::Type) &&
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(dummy.type.type().category() == TypeCategory::Derived ||
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actualType.type().category() == TypeCategory::Derived ||
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dummy.type.type().category() != actualType.type().category())) ||
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(dummy.ignoreTKR.test(common::IgnoreTKR::Kind) &&
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dummy.type.type().category() == actualType.type().category())};
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allowActualArgumentConversions &= !typesCompatibleWithIgnoreTKR;
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if (allowActualArgumentConversions) {
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ConvertIntegerActual(actual, dummy.type, actualType, messages);
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}
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bool typesCompatible{typesCompatibleWithIgnoreTKR ||
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dummy.type.type().IsTkCompatibleWith(actualType.type())};
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if (!typesCompatible && dummy.type.Rank() == 0 &&
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allowActualArgumentConversions) {
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// Extension: pass Hollerith literal to scalar as if it had been BOZ
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if (auto converted{evaluate::HollerithToBOZ(
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foldingContext, actual, dummy.type.type())}) {
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messages.Say(
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"passing Hollerith or character literal as if it were BOZ"_port_en_US);
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actual = *converted;
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actualType.type() = dummy.type.type();
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typesCompatible = true;
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}
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}
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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.ignoreTKR.test(common::IgnoreTKR::Rank)) {
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} else if (dummy.type.Rank() > 0 && !dummyIsAllocatableOrPointer &&
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!dummy.type.attrs().test(
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characteristics::TypeAndShape::Attr::AssumedShape) &&
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!dummy.type.attrs().test(
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characteristics::TypeAndShape::Attr::DeferredShape) &&
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(actualType.Rank() > 0 || IsArrayElement(actual))) {
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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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// and the dummy is an array, but not assumed-shape or an INTENT(IN)
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// pointer that's standing in for an assumed-shape dummy.
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} else {
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// Let CheckConformance accept actual 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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dummyIsAllocatableOrPointer
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? evaluate::CheckConformanceFlags::None
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: evaluate::CheckConformanceFlags::RightScalarExpandable,
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"dummy argument", "actual argument");
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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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auto finals{FinalsForDerivedTypeInstantiation(*derived)};
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if (!finals.empty()) { // 15.5.2.4(2)
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SourceName name{finals.front()->name()};
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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(), name)}) {
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msg->Attach(name, "FINAL subroutine '%s' in derived type '%s'"_en_US,
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name, 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{evaluate::IsObjectPointer(actual, foldingContext)};
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bool dummyIsAssumedRank{dummy.type.attrs().test(
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characteristics::TypeAndShape::Attr::AssumedRank)};
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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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!dummyIsAllocatableOrPointer) {
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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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bool actualIsArrayElement{IsArrayElement(actual)};
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bool actualIsCKindCharacter{
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actualType.type().category() == TypeCategory::Character &&
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actualType.type().kind() == 1};
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if (!actualIsCKindCharacter) {
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if (!actualIsArrayElement &&
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!(dummy.type.type().IsAssumedType() && dummyIsAssumedSize) &&
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!dummyIsAssumedRank &&
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!dummy.ignoreTKR.test(common::IgnoreTKR::Rank)) {
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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 (actualIsArrayElement && actualLastSymbol &&
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IsPointer(*actualLastSymbol)) {
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messages.Say(
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"Element of pointer 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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if (actualLastSymbol && IsAssumedShape(*actualLastSymbol)) {
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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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} else if (actualRank > 0 && dummy.type.Rank() > 0 &&
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actualType.type().category() != TypeCategory::Character) {
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// Both arrays, dummy is not assumed-shape, not character
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if (auto dummySize{evaluate::ToInt64(evaluate::Fold(foldingContext,
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evaluate::GetSize(evaluate::Shape{dummy.type.shape()})))}) {
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if (auto actualSize{evaluate::ToInt64(evaluate::Fold(foldingContext,
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evaluate::GetSize(evaluate::Shape{actualType.shape()})))}) {
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if (*actualSize < *dummySize) {
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auto msg{
|
|
"Actual argument array is smaller (%jd element(s)) 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
|
|
const char *reason{nullptr};
|
|
if (dummy.intent == common::Intent::Out) {
|
|
reason = "INTENT(OUT)";
|
|
} else if (dummy.intent == common::Intent::InOut) {
|
|
reason = "INTENT(IN OUT)";
|
|
}
|
|
if (reason && scope) {
|
|
// Problems with polymorphism are caught in the callee's definition.
|
|
DefinabilityFlags flags{DefinabilityFlag::PolymorphicOkInPure};
|
|
if (isElemental || dummyIsValue) { // 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 (auto *msg{messages.Say(
|
|
"Actual argument associated with %s %s is not definable"_err_en_US,
|
|
reason, dummyName)}) {
|
|
msg->Attach(std::move(*whyNot));
|
|
}
|
|
}
|
|
}
|
|
|
|
// technically legal but worth emitting a warning
|
|
// llvm-project issue #58973: constant actual argument passed in where dummy
|
|
// argument is marked volatile
|
|
bool actualIsVariable{evaluate::IsVariable(actual)};
|
|
if (dummyIsVolatile && !actualIsVariable &&
|
|
context.ShouldWarn(common::UsageWarning::ExprPassedToVolatile)) {
|
|
messages.Say(
|
|
"actual argument associated with VOLATILE %s is not a variable"_warn_en_US,
|
|
dummyName);
|
|
}
|
|
|
|
// 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 && !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 %s"_err_en_US,
|
|
dummyName);
|
|
}
|
|
}
|
|
}
|
|
|
|
// 15.5.2.6 -- dummy is ALLOCATABLE
|
|
bool actualIsAllocatable{evaluate::IsAllocatableDesignator(actual)};
|
|
if (dummyIsAllocatable) {
|
|
if (!actualIsAllocatable) {
|
|
messages.Say(
|
|
"ALLOCATABLE %s must be associated with an ALLOCATABLE actual argument"_err_en_US,
|
|
dummyName);
|
|
}
|
|
if (actualIsAllocatable && 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);
|
|
}
|
|
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);
|
|
}
|
|
} 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) 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()};
|
|
if (actualIsUnlimited != dummyIsUnlimited) {
|
|
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 {
|
|
messages.Say(
|
|
"If a POINTER or ALLOCATABLE dummy or actual argument is polymorphic, both must be so"_err_en_US);
|
|
}
|
|
} else if (!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 == 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);
|
|
}
|
|
}
|
|
}
|
|
|
|
// NULL(MOLD=) checking for non-intrinsic procedures
|
|
bool dummyIsOptional{
|
|
dummy.attrs.test(characteristics::DummyDataObject::Attr::Optional)};
|
|
bool actualIsNull{evaluate::IsNullPointer(actual)};
|
|
if (!intrinsic && !dummyIsPointer && !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 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
|
|
if (!intrinsic &&
|
|
!dummy.attrs.test(characteristics::DummyDataObject::Attr::Value)) {
|
|
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)) {
|
|
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));
|
|
}
|
|
}
|
|
|
|
// Breaking change warnings
|
|
if (intrinsic && dummy.intent != common::Intent::In) {
|
|
WarnOnDeferredLengthCharacterScalar(
|
|
context, &actual, messages.at(), dummyName.c_str());
|
|
}
|
|
}
|
|
|
|
static void CheckProcedureArg(evaluate::ActualArgument &arg,
|
|
const characteristics::Procedure &proc,
|
|
const characteristics::DummyProcedure &dummy, const std::string &dummyName,
|
|
SemanticsContext &context) {
|
|
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>()) {
|
|
evaluate::SayWithDeclaration(messages, *argProcSymbol,
|
|
"Procedure binding '%s' passed as an actual argument"_port_en_US,
|
|
argProcSymbol->name());
|
|
}
|
|
}
|
|
if (auto argChars{characteristics::DummyArgument::FromActual(
|
|
"actual argument", *expr, foldingContext)}) {
|
|
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;
|
|
if (!interface.IsCompatibleWith(argInterface, &whyNot)) {
|
|
// 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 { // 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) {
|
|
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 true;
|
|
} else {
|
|
return false;
|
|
}
|
|
};
|
|
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);
|
|
} else if (object.type.type().IsTypelessIntrinsicArgument() &&
|
|
IsBOZLiteral(*expr)) {
|
|
// ok
|
|
} else if (object.type.type().IsTypelessIntrinsicArgument() &&
|
|
evaluate::IsNullObjectPointer(*expr)) {
|
|
// ok, ASSOCIATED(NULL())
|
|
} else if ((object.attrs.test(characteristics::DummyDataObject::
|
|
Attr::Pointer) ||
|
|
object.attrs.test(characteristics::
|
|
DummyDataObject::Attr::Optional)) &&
|
|
evaluate::IsNullObjectPointer(*expr)) {
|
|
// ok, FOO(NULL())
|
|
} else if (object.attrs.test(characteristics::DummyDataObject::
|
|
Attr::Allocatable) &&
|
|
evaluate::IsNullPointer(*expr)) {
|
|
// Unsupported extension that more or less naturally falls
|
|
// out of other Fortran implementations that pass separate
|
|
// base address and descriptor address physical arguments
|
|
messages.Say(
|
|
"Null actual argument '%s' may not be associated with allocatable %s"_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(evaluate::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);
|
|
}
|
|
},
|
|
[&](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,
|
|
evaluate::FoldingContext &context, const Scope *scope) {
|
|
bool ok{true};
|
|
if (arguments.size() < 2) {
|
|
return;
|
|
}
|
|
if (const auto &pointerArg{arguments[0]}) {
|
|
if (const auto *pointerExpr{pointerArg->UnwrapExpr()}) {
|
|
const Symbol *pointerSymbol{GetLastSymbol(*pointerExpr)};
|
|
if (pointerSymbol && !IsPointer(pointerSymbol->GetUltimate())) {
|
|
evaluate::AttachDeclaration(
|
|
context.messages().Say(pointerArg->sourceLocation(),
|
|
"POINTER= argument of ASSOCIATED() must be a POINTER"_err_en_US),
|
|
*pointerSymbol);
|
|
return;
|
|
}
|
|
if (const auto &targetArg{arguments[1]}) {
|
|
// The standard requires that the POINTER= argument be a valid LHS for
|
|
// a pointer assignment when the TARGET= argument is present. This,
|
|
// perhaps unintentionally, excludes function results, including NULL(),
|
|
// from being used there, as well as INTENT(IN) dummy pointers.
|
|
// Allow this usage as a benign extension with a portability warning.
|
|
if (!evaluate::ExtractDataRef(*pointerExpr) &&
|
|
!evaluate::IsProcedurePointer(*pointerExpr)) {
|
|
context.messages().Say(pointerArg->sourceLocation(),
|
|
"POINTER= argument of ASSOCIATED() should be a pointer"_port_en_US);
|
|
} else if (scope) {
|
|
if (auto whyNot{WhyNotDefinable(pointerArg->sourceLocation().value_or(
|
|
context.messages().at()),
|
|
*scope,
|
|
DefinabilityFlags{DefinabilityFlag::PointerDefinition},
|
|
*pointerExpr)}) {
|
|
if (auto *msg{context.messages().Say(pointerArg->sourceLocation(),
|
|
"POINTER= argument of ASSOCIATED() would not be a valid left-hand side of a pointer assignment statement"_port_en_US)}) {
|
|
msg->Attach(std::move(*whyNot));
|
|
}
|
|
}
|
|
}
|
|
const auto *targetExpr{targetArg->UnwrapExpr()};
|
|
if (targetExpr && pointerSymbol) {
|
|
std::optional<characteristics::Procedure> pointerProc, targetProc;
|
|
const auto *targetProcDesignator{
|
|
evaluate::UnwrapExpr<evaluate::ProcedureDesignator>(*targetExpr)};
|
|
const Symbol *targetSymbol{GetLastSymbol(*targetExpr)};
|
|
bool isCall{false};
|
|
std::string targetName;
|
|
if (const auto *targetProcRef{// target is a function call
|
|
std::get_if<evaluate::ProcedureRef>(&targetExpr->u)}) {
|
|
if (auto targetRefedChars{characteristics::Procedure::Characterize(
|
|
*targetProcRef, context)}) {
|
|
targetProc = *targetRefedChars;
|
|
targetName = targetProcRef->proc().GetName() + "()";
|
|
isCall = true;
|
|
}
|
|
} else if (targetProcDesignator) {
|
|
targetProc = characteristics::Procedure::Characterize(
|
|
*targetProcDesignator, context);
|
|
targetName = targetProcDesignator->GetName();
|
|
} else if (targetSymbol) {
|
|
if (IsProcedure(*targetSymbol)) {
|
|
// proc that's not a call
|
|
targetProc = characteristics::Procedure::Characterize(
|
|
*targetSymbol, context);
|
|
}
|
|
targetName = targetSymbol->name().ToString();
|
|
}
|
|
if (pointerSymbol && IsProcedure(*pointerSymbol)) {
|
|
pointerProc = characteristics::Procedure::Characterize(
|
|
*pointerSymbol, context);
|
|
}
|
|
if (pointerProc) {
|
|
if (targetProc) {
|
|
// procedure pointer and procedure target
|
|
std::string whyNot;
|
|
const evaluate::SpecificIntrinsic *specificIntrinsic{nullptr};
|
|
if (targetProcDesignator) {
|
|
specificIntrinsic =
|
|
targetProcDesignator->GetSpecificIntrinsic();
|
|
}
|
|
if (std::optional<parser::MessageFixedText> msg{
|
|
CheckProcCompatibility(isCall, pointerProc, &*targetProc,
|
|
specificIntrinsic, whyNot)}) {
|
|
msg->set_severity(parser::Severity::Warning);
|
|
evaluate::AttachDeclaration(
|
|
context.messages().Say(std::move(*msg),
|
|
"pointer '" + pointerSymbol->name().ToString() + "'",
|
|
targetName, whyNot),
|
|
*pointerSymbol);
|
|
}
|
|
} else if (!IsNullProcedurePointer(*targetExpr)) {
|
|
// procedure pointer and object target
|
|
evaluate::AttachDeclaration(
|
|
context.messages().Say(
|
|
"POINTER= argument '%s' is a procedure pointer but the TARGET= argument '%s' is not a procedure or procedure pointer"_err_en_US,
|
|
pointerSymbol->name(), targetName),
|
|
*pointerSymbol);
|
|
}
|
|
} else if (targetProc) {
|
|
// object pointer and procedure target
|
|
evaluate::AttachDeclaration(
|
|
context.messages().Say(
|
|
"POINTER= argument '%s' is an object pointer but the TARGET= argument '%s' is a procedure designator"_err_en_US,
|
|
pointerSymbol->name(), targetName),
|
|
*pointerSymbol);
|
|
} else if (targetSymbol) {
|
|
// object pointer and target
|
|
SymbolVector symbols{GetSymbolVector(*targetExpr)};
|
|
CHECK(!symbols.empty());
|
|
if (!evaluate::GetLastTarget(symbols)) {
|
|
parser::Message *msg{context.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)) {
|
|
context.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 {
|
|
// No arguments to ASSOCIATED()
|
|
ok = false;
|
|
}
|
|
if (!ok) {
|
|
context.messages().Say(
|
|
"Arguments of ASSOCIATED() must be a POINTER and an optional valid target"_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 {
|
|
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) &&
|
|
IsAllocatableOrPointer(*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(evaluate::ActualArguments &arguments,
|
|
SemanticsContext &context, const Scope *scope,
|
|
const evaluate::SpecificIntrinsic &intrinsic) {
|
|
if (intrinsic.name == "associated") {
|
|
CheckAssociated(arguments, context.foldingContext(), scope);
|
|
} 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) {
|
|
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);
|
|
} 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(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, false /*extentErrors*/)
|
|
.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-%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);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool CheckArguments(const characteristics::Procedure &proc,
|
|
evaluate::ActualArguments &actuals, SemanticsContext &context,
|
|
const Scope &scope, bool treatingExternalAsImplicit,
|
|
const evaluate::SpecificIntrinsic *intrinsic) {
|
|
bool explicitInterface{proc.HasExplicitInterface()};
|
|
evaluate::FoldingContext foldingContext{context.foldingContext()};
|
|
parser::ContextualMessages &messages{foldingContext.messages()};
|
|
if (!explicitInterface || treatingExternalAsImplicit) {
|
|
parser::Messages buffer;
|
|
{
|
|
auto restorer{messages.SetMessages(buffer)};
|
|
for (auto &actual : actuals) {
|
|
if (actual) {
|
|
CheckImplicitInterfaceArg(*actual, messages, foldingContext);
|
|
}
|
|
}
|
|
}
|
|
if (!buffer.empty()) {
|
|
if (auto *msgs{messages.messages()}) {
|
|
msgs->Annex(std::move(buffer));
|
|
}
|
|
return false; // don't pile on
|
|
}
|
|
}
|
|
if (explicitInterface) {
|
|
auto buffer{CheckExplicitInterface(
|
|
proc, actuals, context, &scope, intrinsic, true, true)};
|
|
if (!buffer.empty()) {
|
|
if (treatingExternalAsImplicit) {
|
|
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);
|
|
}
|
|
}
|
|
if (auto *msgs{messages.messages()}) {
|
|
msgs->Annex(std::move(buffer));
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
} // namespace Fortran::semantics
|