38272f45fe
To make it easier for lowering to identify which symbols from the host are captured by internal subprograms, create HostAssocDetails for them. In particular, if a symbol is referenced and it is contained in a subprogram or main program that is not the same as the containing program unit of the reference, a HostAssocDetails symbol is created in the current scope. Differential Revision: https://reviews.llvm.org/D84889
1309 lines
44 KiB
C++
1309 lines
44 KiB
C++
//===-- lib/Semantics/tools.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 "flang/Parser/tools.h"
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#include "flang/Common/Fortran.h"
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#include "flang/Common/indirection.h"
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#include "flang/Parser/dump-parse-tree.h"
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#include "flang/Parser/message.h"
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#include "flang/Parser/parse-tree.h"
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#include "flang/Semantics/scope.h"
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#include "flang/Semantics/semantics.h"
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#include "flang/Semantics/symbol.h"
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#include "flang/Semantics/tools.h"
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#include "flang/Semantics/type.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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#include <set>
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#include <variant>
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namespace Fortran::semantics {
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// Find this or containing scope that matches predicate
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static const Scope *FindScopeContaining(
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const Scope &start, std::function<bool(const Scope &)> predicate) {
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for (const Scope *scope{&start};; scope = &scope->parent()) {
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if (predicate(*scope)) {
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return scope;
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}
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if (scope->IsGlobal()) {
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return nullptr;
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}
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}
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}
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const Scope *FindModuleContaining(const Scope &start) {
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return FindScopeContaining(
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start, [](const Scope &scope) { return scope.IsModule(); });
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}
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const Scope *FindProgramUnitContaining(const Scope &start) {
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return FindScopeContaining(start, [](const Scope &scope) {
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switch (scope.kind()) {
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case Scope::Kind::Module:
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case Scope::Kind::MainProgram:
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case Scope::Kind::Subprogram:
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case Scope::Kind::BlockData:
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return true;
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default:
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return false;
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}
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});
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}
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const Scope *FindProgramUnitContaining(const Symbol &symbol) {
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return FindProgramUnitContaining(symbol.owner());
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}
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const Scope *FindPureProcedureContaining(const Scope &start) {
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// N.B. We only need to examine the innermost containing program unit
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// because an internal subprogram of a pure subprogram must also
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// be pure (C1592).
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if (const Scope * scope{FindProgramUnitContaining(start)}) {
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if (IsPureProcedure(*scope)) {
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return scope;
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}
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}
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return nullptr;
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}
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Tristate IsDefinedAssignment(
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const std::optional<evaluate::DynamicType> &lhsType, int lhsRank,
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const std::optional<evaluate::DynamicType> &rhsType, int rhsRank) {
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if (!lhsType || !rhsType) {
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return Tristate::No; // error or rhs is untyped
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}
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TypeCategory lhsCat{lhsType->category()};
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TypeCategory rhsCat{rhsType->category()};
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if (rhsRank > 0 && lhsRank != rhsRank) {
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return Tristate::Yes;
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} else if (lhsCat != TypeCategory::Derived) {
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return ToTristate(lhsCat != rhsCat &&
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(!IsNumericTypeCategory(lhsCat) || !IsNumericTypeCategory(rhsCat)));
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} else {
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const auto *lhsDerived{evaluate::GetDerivedTypeSpec(lhsType)};
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const auto *rhsDerived{evaluate::GetDerivedTypeSpec(rhsType)};
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if (lhsDerived && rhsDerived && *lhsDerived == *rhsDerived) {
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return Tristate::Maybe; // TYPE(t) = TYPE(t) can be defined or
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// intrinsic
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} else {
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return Tristate::Yes;
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}
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}
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}
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bool IsIntrinsicRelational(common::RelationalOperator opr,
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const evaluate::DynamicType &type0, int rank0,
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const evaluate::DynamicType &type1, int rank1) {
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if (!evaluate::AreConformable(rank0, rank1)) {
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return false;
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} else {
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auto cat0{type0.category()};
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auto cat1{type1.category()};
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if (IsNumericTypeCategory(cat0) && IsNumericTypeCategory(cat1)) {
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// numeric types: EQ/NE always ok, others ok for non-complex
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return opr == common::RelationalOperator::EQ ||
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opr == common::RelationalOperator::NE ||
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(cat0 != TypeCategory::Complex && cat1 != TypeCategory::Complex);
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} else {
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// not both numeric: only Character is ok
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return cat0 == TypeCategory::Character && cat1 == TypeCategory::Character;
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}
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}
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}
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bool IsIntrinsicNumeric(const evaluate::DynamicType &type0) {
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return IsNumericTypeCategory(type0.category());
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}
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bool IsIntrinsicNumeric(const evaluate::DynamicType &type0, int rank0,
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const evaluate::DynamicType &type1, int rank1) {
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return evaluate::AreConformable(rank0, rank1) &&
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IsNumericTypeCategory(type0.category()) &&
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IsNumericTypeCategory(type1.category());
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}
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bool IsIntrinsicLogical(const evaluate::DynamicType &type0) {
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return type0.category() == TypeCategory::Logical;
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}
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bool IsIntrinsicLogical(const evaluate::DynamicType &type0, int rank0,
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const evaluate::DynamicType &type1, int rank1) {
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return evaluate::AreConformable(rank0, rank1) &&
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type0.category() == TypeCategory::Logical &&
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type1.category() == TypeCategory::Logical;
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}
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bool IsIntrinsicConcat(const evaluate::DynamicType &type0, int rank0,
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const evaluate::DynamicType &type1, int rank1) {
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return evaluate::AreConformable(rank0, rank1) &&
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type0.category() == TypeCategory::Character &&
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type1.category() == TypeCategory::Character &&
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type0.kind() == type1.kind();
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}
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bool IsGenericDefinedOp(const Symbol &symbol) {
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const Symbol &ultimate{symbol.GetUltimate()};
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if (const auto *generic{ultimate.detailsIf<GenericDetails>()}) {
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return generic->kind().IsDefinedOperator();
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} else if (const auto *misc{ultimate.detailsIf<MiscDetails>()}) {
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return misc->kind() == MiscDetails::Kind::TypeBoundDefinedOp;
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} else {
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return false;
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}
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}
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bool IsCommonBlockContaining(const Symbol &block, const Symbol &object) {
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const auto &objects{block.get<CommonBlockDetails>().objects()};
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auto found{std::find(objects.begin(), objects.end(), object)};
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return found != objects.end();
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}
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bool IsUseAssociated(const Symbol &symbol, const Scope &scope) {
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const Scope *owner{FindProgramUnitContaining(symbol.GetUltimate().owner())};
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return owner && owner->kind() == Scope::Kind::Module &&
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owner != FindProgramUnitContaining(scope);
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}
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bool DoesScopeContain(
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const Scope *maybeAncestor, const Scope &maybeDescendent) {
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return maybeAncestor && !maybeDescendent.IsGlobal() &&
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FindScopeContaining(maybeDescendent.parent(),
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[&](const Scope &scope) { return &scope == maybeAncestor; });
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}
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bool DoesScopeContain(const Scope *maybeAncestor, const Symbol &symbol) {
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return DoesScopeContain(maybeAncestor, symbol.owner());
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}
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static const Symbol &FollowHostAssoc(const Symbol &symbol) {
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for (const Symbol *s{&symbol};;) {
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const auto *details{s->detailsIf<HostAssocDetails>()};
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if (!details) {
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return *s;
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}
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s = &details->symbol();
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}
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}
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bool IsHostAssociated(const Symbol &symbol, const Scope &scope) {
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const Scope *subprogram{FindProgramUnitContaining(scope)};
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return subprogram &&
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DoesScopeContain(
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FindProgramUnitContaining(FollowHostAssoc(symbol)), *subprogram);
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}
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bool IsInStmtFunction(const Symbol &symbol) {
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if (const Symbol * function{symbol.owner().symbol()}) {
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return IsStmtFunction(*function);
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}
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return false;
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}
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bool IsStmtFunctionDummy(const Symbol &symbol) {
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return IsDummy(symbol) && IsInStmtFunction(symbol);
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}
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bool IsStmtFunctionResult(const Symbol &symbol) {
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return IsFunctionResult(symbol) && IsInStmtFunction(symbol);
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}
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bool IsPointerDummy(const Symbol &symbol) {
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return IsPointer(symbol) && IsDummy(symbol);
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}
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// proc-name
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bool IsProcName(const Symbol &symbol) {
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return symbol.GetUltimate().has<ProcEntityDetails>();
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}
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bool IsBindCProcedure(const Symbol &symbol) {
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if (const auto *procDetails{symbol.detailsIf<ProcEntityDetails>()}) {
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if (const Symbol * procInterface{procDetails->interface().symbol()}) {
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// procedure component with a BIND(C) interface
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return IsBindCProcedure(*procInterface);
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}
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}
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return symbol.attrs().test(Attr::BIND_C) && IsProcedure(symbol);
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}
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bool IsBindCProcedure(const Scope &scope) {
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if (const Symbol * symbol{scope.GetSymbol()}) {
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return IsBindCProcedure(*symbol);
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} else {
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return false;
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}
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}
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static const Symbol *FindPointerComponent(
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const Scope &scope, std::set<const Scope *> &visited) {
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if (!scope.IsDerivedType()) {
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return nullptr;
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}
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if (!visited.insert(&scope).second) {
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return nullptr;
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}
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// If there's a top-level pointer component, return it for clearer error
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// messaging.
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for (const auto &pair : scope) {
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const Symbol &symbol{*pair.second};
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if (IsPointer(symbol)) {
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return &symbol;
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}
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}
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for (const auto &pair : scope) {
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const Symbol &symbol{*pair.second};
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if (const auto *details{symbol.detailsIf<ObjectEntityDetails>()}) {
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if (const DeclTypeSpec * type{details->type()}) {
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if (const DerivedTypeSpec * derived{type->AsDerived()}) {
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if (const Scope * nested{derived->scope()}) {
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if (const Symbol *
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pointer{FindPointerComponent(*nested, visited)}) {
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return pointer;
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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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return nullptr;
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}
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const Symbol *FindPointerComponent(const Scope &scope) {
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std::set<const Scope *> visited;
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return FindPointerComponent(scope, visited);
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}
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const Symbol *FindPointerComponent(const DerivedTypeSpec &derived) {
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if (const Scope * scope{derived.scope()}) {
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return FindPointerComponent(*scope);
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} else {
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return nullptr;
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}
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}
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const Symbol *FindPointerComponent(const DeclTypeSpec &type) {
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if (const DerivedTypeSpec * derived{type.AsDerived()}) {
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return FindPointerComponent(*derived);
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} else {
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return nullptr;
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}
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}
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const Symbol *FindPointerComponent(const DeclTypeSpec *type) {
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return type ? FindPointerComponent(*type) : nullptr;
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}
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const Symbol *FindPointerComponent(const Symbol &symbol) {
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return IsPointer(symbol) ? &symbol : FindPointerComponent(symbol.GetType());
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}
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// C1594 specifies several ways by which an object might be globally visible.
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const Symbol *FindExternallyVisibleObject(
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const Symbol &object, const Scope &scope) {
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// TODO: Storage association with any object for which this predicate holds,
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// once EQUIVALENCE is supported.
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if (IsUseAssociated(object, scope) || IsHostAssociated(object, scope) ||
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(IsPureProcedure(scope) && IsPointerDummy(object)) ||
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(IsIntentIn(object) && IsDummy(object))) {
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return &object;
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} else if (const Symbol * block{FindCommonBlockContaining(object)}) {
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return block;
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} else {
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return nullptr;
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}
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}
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bool ExprHasTypeCategory(
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const SomeExpr &expr, const common::TypeCategory &type) {
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auto dynamicType{expr.GetType()};
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return dynamicType && dynamicType->category() == type;
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}
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bool ExprTypeKindIsDefault(
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const SomeExpr &expr, const SemanticsContext &context) {
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auto dynamicType{expr.GetType()};
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return dynamicType &&
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dynamicType->category() != common::TypeCategory::Derived &&
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dynamicType->kind() == context.GetDefaultKind(dynamicType->category());
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}
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// If an analyzed expr or assignment is missing, dump the node and die.
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template <typename T>
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static void CheckMissingAnalysis(bool absent, const T &x) {
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if (absent) {
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std::string buf;
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llvm::raw_string_ostream ss{buf};
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ss << "node has not been analyzed:\n";
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parser::DumpTree(ss, x);
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common::die(ss.str().c_str());
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}
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}
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const SomeExpr *GetExprHelper::Get(const parser::Expr &x) {
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CheckMissingAnalysis(!x.typedExpr, x);
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return common::GetPtrFromOptional(x.typedExpr->v);
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}
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const SomeExpr *GetExprHelper::Get(const parser::Variable &x) {
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CheckMissingAnalysis(!x.typedExpr, x);
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return common::GetPtrFromOptional(x.typedExpr->v);
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}
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const SomeExpr *GetExprHelper::Get(const parser::DataStmtConstant &x) {
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CheckMissingAnalysis(!x.typedExpr, x);
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return common::GetPtrFromOptional(x.typedExpr->v);
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}
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const evaluate::Assignment *GetAssignment(const parser::AssignmentStmt &x) {
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CheckMissingAnalysis(!x.typedAssignment, x);
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return common::GetPtrFromOptional(x.typedAssignment->v);
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}
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const evaluate::Assignment *GetAssignment(
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const parser::PointerAssignmentStmt &x) {
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CheckMissingAnalysis(!x.typedAssignment, x);
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return common::GetPtrFromOptional(x.typedAssignment->v);
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}
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const Symbol *FindInterface(const Symbol &symbol) {
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return std::visit(
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common::visitors{
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[](const ProcEntityDetails &details) {
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return details.interface().symbol();
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},
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[](const ProcBindingDetails &details) { return &details.symbol(); },
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[](const auto &) -> const Symbol * { return nullptr; },
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},
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symbol.details());
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}
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const Symbol *FindSubprogram(const Symbol &symbol) {
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return std::visit(
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common::visitors{
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[&](const ProcEntityDetails &details) -> const Symbol * {
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if (const Symbol * interface{details.interface().symbol()}) {
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return FindSubprogram(*interface);
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} else {
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return &symbol;
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}
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},
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[](const ProcBindingDetails &details) {
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return FindSubprogram(details.symbol());
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},
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[&](const SubprogramDetails &) { return &symbol; },
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[](const UseDetails &details) {
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return FindSubprogram(details.symbol());
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},
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[](const HostAssocDetails &details) {
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return FindSubprogram(details.symbol());
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},
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[](const auto &) -> const Symbol * { return nullptr; },
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},
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symbol.details());
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}
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const Symbol *FindFunctionResult(const Symbol &symbol) {
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if (const Symbol * subp{FindSubprogram(symbol)}) {
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if (const auto &subpDetails{subp->detailsIf<SubprogramDetails>()}) {
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if (subpDetails->isFunction()) {
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return &subpDetails->result();
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}
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}
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}
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return nullptr;
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}
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const Symbol *FindOverriddenBinding(const Symbol &symbol) {
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if (symbol.has<ProcBindingDetails>()) {
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if (const DeclTypeSpec * parentType{FindParentTypeSpec(symbol.owner())}) {
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if (const DerivedTypeSpec * parentDerived{parentType->AsDerived()}) {
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if (const Scope * parentScope{parentDerived->typeSymbol().scope()}) {
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return parentScope->FindComponent(symbol.name());
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}
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}
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}
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}
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return nullptr;
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}
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const DeclTypeSpec *FindParentTypeSpec(const DerivedTypeSpec &derived) {
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return FindParentTypeSpec(derived.typeSymbol());
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}
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const DeclTypeSpec *FindParentTypeSpec(const DeclTypeSpec &decl) {
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if (const DerivedTypeSpec * derived{decl.AsDerived()}) {
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return FindParentTypeSpec(*derived);
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} else {
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return nullptr;
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}
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}
|
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|
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const DeclTypeSpec *FindParentTypeSpec(const Scope &scope) {
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if (scope.kind() == Scope::Kind::DerivedType) {
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if (const auto *symbol{scope.symbol()}) {
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return FindParentTypeSpec(*symbol);
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}
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}
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return nullptr;
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}
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|
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const DeclTypeSpec *FindParentTypeSpec(const Symbol &symbol) {
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if (const Scope * scope{symbol.scope()}) {
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if (const auto *details{symbol.detailsIf<DerivedTypeDetails>()}) {
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if (const Symbol * parent{details->GetParentComponent(*scope)}) {
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return parent->GetType();
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}
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}
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}
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return nullptr;
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}
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|
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bool IsExtensibleType(const DerivedTypeSpec *derived) {
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return derived && !IsIsoCType(derived) &&
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!derived->typeSymbol().attrs().test(Attr::BIND_C) &&
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!derived->typeSymbol().get<DerivedTypeDetails>().sequence();
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}
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|
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bool IsBuiltinDerivedType(const DerivedTypeSpec *derived, const char *name) {
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if (!derived) {
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return false;
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} else {
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const auto &symbol{derived->typeSymbol()};
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return symbol.owner().IsModule() &&
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symbol.owner().GetName().value() == "__fortran_builtins" &&
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symbol.name() == "__builtin_"s + name;
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}
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}
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bool IsIsoCType(const DerivedTypeSpec *derived) {
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return IsBuiltinDerivedType(derived, "c_ptr") ||
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IsBuiltinDerivedType(derived, "c_funptr");
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}
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bool IsTeamType(const DerivedTypeSpec *derived) {
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return IsBuiltinDerivedType(derived, "team_type");
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}
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bool IsEventTypeOrLockType(const DerivedTypeSpec *derivedTypeSpec) {
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return IsBuiltinDerivedType(derivedTypeSpec, "event_type") ||
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IsBuiltinDerivedType(derivedTypeSpec, "lock_type");
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}
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|
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bool IsOrContainsEventOrLockComponent(const Symbol &symbol) {
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if (const Symbol * root{GetAssociationRoot(symbol)}) {
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if (const auto *details{root->detailsIf<ObjectEntityDetails>()}) {
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if (const DeclTypeSpec * type{details->type()}) {
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if (const DerivedTypeSpec * derived{type->AsDerived()}) {
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return IsEventTypeOrLockType(derived) ||
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FindEventOrLockPotentialComponent(*derived);
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}
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}
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}
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|
}
|
|
return false;
|
|
}
|
|
|
|
// Check this symbol suitable as a type-bound procedure - C769
|
|
bool CanBeTypeBoundProc(const Symbol *symbol) {
|
|
if (!symbol || IsDummy(*symbol) || IsProcedurePointer(*symbol)) {
|
|
return false;
|
|
} else if (symbol->has<SubprogramNameDetails>()) {
|
|
return symbol->owner().kind() == Scope::Kind::Module;
|
|
} else if (auto *details{symbol->detailsIf<SubprogramDetails>()}) {
|
|
return symbol->owner().kind() == Scope::Kind::Module ||
|
|
details->isInterface();
|
|
} else if (const auto *proc{symbol->detailsIf<ProcEntityDetails>()}) {
|
|
return !symbol->attrs().test(Attr::INTRINSIC) &&
|
|
proc->HasExplicitInterface();
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool IsInitialized(const Symbol &symbol, bool ignoreDATAstatements) {
|
|
if (!ignoreDATAstatements && symbol.test(Symbol::Flag::InDataStmt)) {
|
|
return true;
|
|
} else if (IsNamedConstant(symbol)) {
|
|
return false;
|
|
} else if (const auto *object{symbol.detailsIf<ObjectEntityDetails>()}) {
|
|
if (object->init()) {
|
|
return true;
|
|
} else if (object->isDummy() || IsFunctionResult(symbol)) {
|
|
return false;
|
|
} else if (IsAllocatable(symbol)) {
|
|
return true;
|
|
} else if (!IsPointer(symbol) && object->type()) {
|
|
if (const auto *derived{object->type()->AsDerived()}) {
|
|
if (derived->HasDefaultInitialization()) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
} else if (const auto *proc{symbol.detailsIf<ProcEntityDetails>()}) {
|
|
return proc->init().has_value();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool HasIntrinsicTypeName(const Symbol &symbol) {
|
|
std::string name{symbol.name().ToString()};
|
|
if (name == "doubleprecision") {
|
|
return true;
|
|
} else if (name == "derived") {
|
|
return false;
|
|
} else {
|
|
for (int i{0}; i != common::TypeCategory_enumSize; ++i) {
|
|
if (name == parser::ToLowerCaseLetters(EnumToString(TypeCategory{i}))) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool IsSeparateModuleProcedureInterface(const Symbol *symbol) {
|
|
if (symbol && symbol->attrs().test(Attr::MODULE)) {
|
|
if (auto *details{symbol->detailsIf<SubprogramDetails>()}) {
|
|
return details->isInterface();
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// 3.11 automatic data object
|
|
bool IsAutomatic(const Symbol &symbol) {
|
|
if (const auto *object{symbol.detailsIf<ObjectEntityDetails>()}) {
|
|
if (!object->isDummy() && !IsAllocatable(symbol) && !IsPointer(symbol)) {
|
|
if (const DeclTypeSpec * type{symbol.GetType()}) {
|
|
// If a type parameter value is not a constant expression, the
|
|
// object is automatic.
|
|
if (type->category() == DeclTypeSpec::Character) {
|
|
if (const auto &length{
|
|
type->characterTypeSpec().length().GetExplicit()}) {
|
|
if (!evaluate::IsConstantExpr(*length)) {
|
|
return true;
|
|
}
|
|
}
|
|
} else if (const DerivedTypeSpec * derived{type->AsDerived()}) {
|
|
for (const auto &pair : derived->parameters()) {
|
|
if (const auto &value{pair.second.GetExplicit()}) {
|
|
if (!evaluate::IsConstantExpr(*value)) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// If an array bound is not a constant expression, the object is
|
|
// automatic.
|
|
for (const ShapeSpec &dim : object->shape()) {
|
|
if (const auto &lb{dim.lbound().GetExplicit()}) {
|
|
if (!evaluate::IsConstantExpr(*lb)) {
|
|
return true;
|
|
}
|
|
}
|
|
if (const auto &ub{dim.ubound().GetExplicit()}) {
|
|
if (!evaluate::IsConstantExpr(*ub)) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool IsFinalizable(const Symbol &symbol) {
|
|
if (const DeclTypeSpec * type{symbol.GetType()}) {
|
|
if (const DerivedTypeSpec * derived{type->AsDerived()}) {
|
|
return IsFinalizable(*derived);
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool IsFinalizable(const DerivedTypeSpec &derived) {
|
|
ScopeComponentIterator components{derived};
|
|
return std::find_if(components.begin(), components.end(),
|
|
[](const Symbol &x) { return x.has<FinalProcDetails>(); }) !=
|
|
components.end();
|
|
}
|
|
|
|
// TODO The following function returns true for all types with FINAL procedures
|
|
// This is because we don't yet fill in the data for FinalProcDetails
|
|
bool HasImpureFinal(const DerivedTypeSpec &derived) {
|
|
ScopeComponentIterator components{derived};
|
|
return std::find_if(
|
|
components.begin(), components.end(), [](const Symbol &x) {
|
|
return x.has<FinalProcDetails>() && !x.attrs().test(Attr::PURE);
|
|
}) != components.end();
|
|
}
|
|
|
|
bool IsCoarray(const Symbol &symbol) { return symbol.Corank() > 0; }
|
|
|
|
bool IsAutomaticObject(const Symbol &symbol) {
|
|
if (IsDummy(symbol) || IsPointer(symbol) || IsAllocatable(symbol)) {
|
|
return false;
|
|
}
|
|
if (const DeclTypeSpec * type{symbol.GetType()}) {
|
|
if (type->category() == DeclTypeSpec::Character) {
|
|
ParamValue length{type->characterTypeSpec().length()};
|
|
if (length.isExplicit()) {
|
|
if (MaybeIntExpr lengthExpr{length.GetExplicit()}) {
|
|
if (!ToInt64(lengthExpr)) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (symbol.IsObjectArray()) {
|
|
for (const ShapeSpec &spec : symbol.get<ObjectEntityDetails>().shape()) {
|
|
auto &lbound{spec.lbound().GetExplicit()};
|
|
auto &ubound{spec.ubound().GetExplicit()};
|
|
if ((lbound && !evaluate::ToInt64(*lbound)) ||
|
|
(ubound && !evaluate::ToInt64(*ubound))) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool IsAssumedLengthCharacter(const Symbol &symbol) {
|
|
if (const DeclTypeSpec * type{symbol.GetType()}) {
|
|
return type->category() == DeclTypeSpec::Character &&
|
|
type->characterTypeSpec().length().isAssumed();
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool IsInBlankCommon(const Symbol &symbol) {
|
|
const Symbol *block{FindCommonBlockContaining(symbol)};
|
|
return block && block->name().empty();
|
|
}
|
|
|
|
// C722 and C723: For a function to be assumed length, it must be external and
|
|
// of CHARACTER type
|
|
bool IsExternal(const Symbol &symbol) {
|
|
return (symbol.has<SubprogramDetails>() && symbol.owner().IsGlobal()) ||
|
|
symbol.attrs().test(Attr::EXTERNAL);
|
|
}
|
|
|
|
const Symbol *IsExternalInPureContext(
|
|
const Symbol &symbol, const Scope &scope) {
|
|
if (const auto *pureProc{FindPureProcedureContaining(scope)}) {
|
|
if (const Symbol * root{GetAssociationRoot(symbol)}) {
|
|
if (const Symbol *
|
|
visible{FindExternallyVisibleObject(*root, *pureProc)}) {
|
|
return visible;
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
PotentialComponentIterator::const_iterator FindPolymorphicPotentialComponent(
|
|
const DerivedTypeSpec &derived) {
|
|
PotentialComponentIterator potentials{derived};
|
|
return std::find_if(
|
|
potentials.begin(), potentials.end(), [](const Symbol &component) {
|
|
if (const auto *details{component.detailsIf<ObjectEntityDetails>()}) {
|
|
const DeclTypeSpec *type{details->type()};
|
|
return type && type->IsPolymorphic();
|
|
}
|
|
return false;
|
|
});
|
|
}
|
|
|
|
bool IsOrContainsPolymorphicComponent(const Symbol &symbol) {
|
|
if (const Symbol * root{GetAssociationRoot(symbol)}) {
|
|
if (const auto *details{root->detailsIf<ObjectEntityDetails>()}) {
|
|
if (const DeclTypeSpec * type{details->type()}) {
|
|
if (type->IsPolymorphic()) {
|
|
return true;
|
|
}
|
|
if (const DerivedTypeSpec * derived{type->AsDerived()}) {
|
|
return (bool)FindPolymorphicPotentialComponent(*derived);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool InProtectedContext(const Symbol &symbol, const Scope ¤tScope) {
|
|
return IsProtected(symbol) && !IsHostAssociated(symbol, currentScope);
|
|
}
|
|
|
|
// C1101 and C1158
|
|
// TODO Need to check for a coindexed object (why? C1103?)
|
|
std::optional<parser::MessageFixedText> WhyNotModifiable(
|
|
const Symbol &symbol, const Scope &scope) {
|
|
const Symbol *root{GetAssociationRoot(symbol)};
|
|
if (!root) {
|
|
return "'%s' is construct associated with an expression"_en_US;
|
|
} else if (InProtectedContext(*root, scope)) {
|
|
return "'%s' is protected in this scope"_en_US;
|
|
} else if (IsExternalInPureContext(*root, scope)) {
|
|
return "'%s' is externally visible and referenced in a pure"
|
|
" procedure"_en_US;
|
|
} else if (IsOrContainsEventOrLockComponent(*root)) {
|
|
return "'%s' is an entity with either an EVENT_TYPE or LOCK_TYPE"_en_US;
|
|
} else if (IsIntentIn(*root)) {
|
|
return "'%s' is an INTENT(IN) dummy argument"_en_US;
|
|
} else if (!IsVariableName(*root)) {
|
|
return "'%s' is not a variable"_en_US;
|
|
} else {
|
|
return std::nullopt;
|
|
}
|
|
}
|
|
|
|
std::optional<parser::Message> WhyNotModifiable(parser::CharBlock at,
|
|
const SomeExpr &expr, const Scope &scope, bool vectorSubscriptIsOk) {
|
|
if (!evaluate::IsVariable(expr)) {
|
|
return parser::Message{at, "Expression is not a variable"_en_US};
|
|
} else if (auto dataRef{evaluate::ExtractDataRef(expr, true)}) {
|
|
if (!vectorSubscriptIsOk && evaluate::HasVectorSubscript(expr)) {
|
|
return parser::Message{at, "Variable has a vector subscript"_en_US};
|
|
}
|
|
const Symbol &symbol{dataRef->GetFirstSymbol()};
|
|
if (auto maybeWhy{WhyNotModifiable(symbol, scope)}) {
|
|
return parser::Message{symbol.name(),
|
|
parser::MessageFormattedText{std::move(*maybeWhy), symbol.name()}};
|
|
}
|
|
} else {
|
|
// reference to function returning POINTER
|
|
}
|
|
return std::nullopt;
|
|
}
|
|
|
|
class ImageControlStmtHelper {
|
|
using ImageControlStmts = std::variant<parser::ChangeTeamConstruct,
|
|
parser::CriticalConstruct, parser::EventPostStmt, parser::EventWaitStmt,
|
|
parser::FormTeamStmt, parser::LockStmt, parser::StopStmt,
|
|
parser::SyncAllStmt, parser::SyncImagesStmt, parser::SyncMemoryStmt,
|
|
parser::SyncTeamStmt, parser::UnlockStmt>;
|
|
|
|
public:
|
|
template <typename T> bool operator()(const T &) {
|
|
return common::HasMember<T, ImageControlStmts>;
|
|
}
|
|
template <typename T> bool operator()(const common::Indirection<T> &x) {
|
|
return (*this)(x.value());
|
|
}
|
|
bool operator()(const parser::AllocateStmt &stmt) {
|
|
const auto &allocationList{std::get<std::list<parser::Allocation>>(stmt.t)};
|
|
for (const auto &allocation : allocationList) {
|
|
const auto &allocateObject{
|
|
std::get<parser::AllocateObject>(allocation.t)};
|
|
if (IsCoarrayObject(allocateObject)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
bool operator()(const parser::DeallocateStmt &stmt) {
|
|
const auto &allocateObjectList{
|
|
std::get<std::list<parser::AllocateObject>>(stmt.t)};
|
|
for (const auto &allocateObject : allocateObjectList) {
|
|
if (IsCoarrayObject(allocateObject)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
bool operator()(const parser::CallStmt &stmt) {
|
|
const auto &procedureDesignator{
|
|
std::get<parser::ProcedureDesignator>(stmt.v.t)};
|
|
if (auto *name{std::get_if<parser::Name>(&procedureDesignator.u)}) {
|
|
// TODO: also ensure that the procedure is, in fact, an intrinsic
|
|
if (name->source == "move_alloc") {
|
|
const auto &args{std::get<std::list<parser::ActualArgSpec>>(stmt.v.t)};
|
|
if (!args.empty()) {
|
|
const parser::ActualArg &actualArg{
|
|
std::get<parser::ActualArg>(args.front().t)};
|
|
if (const auto *argExpr{
|
|
std::get_if<common::Indirection<parser::Expr>>(
|
|
&actualArg.u)}) {
|
|
return HasCoarray(argExpr->value());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
bool operator()(const parser::Statement<parser::ActionStmt> &stmt) {
|
|
return std::visit(*this, stmt.statement.u);
|
|
}
|
|
|
|
private:
|
|
bool IsCoarrayObject(const parser::AllocateObject &allocateObject) {
|
|
const parser::Name &name{GetLastName(allocateObject)};
|
|
return name.symbol && IsCoarray(*name.symbol);
|
|
}
|
|
};
|
|
|
|
bool IsImageControlStmt(const parser::ExecutableConstruct &construct) {
|
|
return std::visit(ImageControlStmtHelper{}, construct.u);
|
|
}
|
|
|
|
std::optional<parser::MessageFixedText> GetImageControlStmtCoarrayMsg(
|
|
const parser::ExecutableConstruct &construct) {
|
|
if (const auto *actionStmt{
|
|
std::get_if<parser::Statement<parser::ActionStmt>>(&construct.u)}) {
|
|
return std::visit(
|
|
common::visitors{
|
|
[](const common::Indirection<parser::AllocateStmt> &)
|
|
-> std::optional<parser::MessageFixedText> {
|
|
return "ALLOCATE of a coarray is an image control"
|
|
" statement"_en_US;
|
|
},
|
|
[](const common::Indirection<parser::DeallocateStmt> &)
|
|
-> std::optional<parser::MessageFixedText> {
|
|
return "DEALLOCATE of a coarray is an image control"
|
|
" statement"_en_US;
|
|
},
|
|
[](const common::Indirection<parser::CallStmt> &)
|
|
-> std::optional<parser::MessageFixedText> {
|
|
return "MOVE_ALLOC of a coarray is an image control"
|
|
" statement "_en_US;
|
|
},
|
|
[](const auto &) -> std::optional<parser::MessageFixedText> {
|
|
return std::nullopt;
|
|
},
|
|
},
|
|
actionStmt->statement.u);
|
|
}
|
|
return std::nullopt;
|
|
}
|
|
|
|
parser::CharBlock GetImageControlStmtLocation(
|
|
const parser::ExecutableConstruct &executableConstruct) {
|
|
return std::visit(
|
|
common::visitors{
|
|
[](const common::Indirection<parser::ChangeTeamConstruct>
|
|
&construct) {
|
|
return std::get<parser::Statement<parser::ChangeTeamStmt>>(
|
|
construct.value().t)
|
|
.source;
|
|
},
|
|
[](const common::Indirection<parser::CriticalConstruct> &construct) {
|
|
return std::get<parser::Statement<parser::CriticalStmt>>(
|
|
construct.value().t)
|
|
.source;
|
|
},
|
|
[](const parser::Statement<parser::ActionStmt> &actionStmt) {
|
|
return actionStmt.source;
|
|
},
|
|
[](const auto &) { return parser::CharBlock{}; },
|
|
},
|
|
executableConstruct.u);
|
|
}
|
|
|
|
bool HasCoarray(const parser::Expr &expression) {
|
|
if (const auto *expr{GetExpr(expression)}) {
|
|
for (const Symbol &symbol : evaluate::CollectSymbols(*expr)) {
|
|
if (const Symbol * root{GetAssociationRoot(symbol)}) {
|
|
if (IsCoarray(*root)) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool IsPolymorphic(const Symbol &symbol) {
|
|
if (const DeclTypeSpec * type{symbol.GetType()}) {
|
|
return type->IsPolymorphic();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool IsPolymorphicAllocatable(const Symbol &symbol) {
|
|
return IsAllocatable(symbol) && IsPolymorphic(symbol);
|
|
}
|
|
|
|
std::optional<parser::MessageFormattedText> CheckAccessibleComponent(
|
|
const Scope &scope, const Symbol &symbol) {
|
|
CHECK(symbol.owner().IsDerivedType()); // symbol must be a component
|
|
if (symbol.attrs().test(Attr::PRIVATE)) {
|
|
if (const Scope * moduleScope{FindModuleContaining(symbol.owner())}) {
|
|
if (!moduleScope->Contains(scope)) {
|
|
return parser::MessageFormattedText{
|
|
"PRIVATE component '%s' is only accessible within module '%s'"_err_en_US,
|
|
symbol.name(), moduleScope->GetName().value()};
|
|
}
|
|
}
|
|
}
|
|
return std::nullopt;
|
|
}
|
|
|
|
std::list<SourceName> OrderParameterNames(const Symbol &typeSymbol) {
|
|
std::list<SourceName> result;
|
|
if (const DerivedTypeSpec * spec{typeSymbol.GetParentTypeSpec()}) {
|
|
result = OrderParameterNames(spec->typeSymbol());
|
|
}
|
|
const auto ¶mNames{typeSymbol.get<DerivedTypeDetails>().paramNames()};
|
|
result.insert(result.end(), paramNames.begin(), paramNames.end());
|
|
return result;
|
|
}
|
|
|
|
SymbolVector OrderParameterDeclarations(const Symbol &typeSymbol) {
|
|
SymbolVector result;
|
|
if (const DerivedTypeSpec * spec{typeSymbol.GetParentTypeSpec()}) {
|
|
result = OrderParameterDeclarations(spec->typeSymbol());
|
|
}
|
|
const auto ¶mDecls{typeSymbol.get<DerivedTypeDetails>().paramDecls()};
|
|
result.insert(result.end(), paramDecls.begin(), paramDecls.end());
|
|
return result;
|
|
}
|
|
|
|
const DeclTypeSpec &FindOrInstantiateDerivedType(Scope &scope,
|
|
DerivedTypeSpec &&spec, SemanticsContext &semanticsContext,
|
|
DeclTypeSpec::Category category) {
|
|
spec.CookParameters(semanticsContext.foldingContext());
|
|
spec.EvaluateParameters(semanticsContext.foldingContext());
|
|
if (const DeclTypeSpec *
|
|
type{scope.FindInstantiatedDerivedType(spec, category)}) {
|
|
return *type;
|
|
}
|
|
// Create a new instantiation of this parameterized derived type
|
|
// for this particular distinct set of actual parameter values.
|
|
DeclTypeSpec &type{scope.MakeDerivedType(category, std::move(spec))};
|
|
type.derivedTypeSpec().Instantiate(scope, semanticsContext);
|
|
return type;
|
|
}
|
|
|
|
const Symbol *FindSeparateModuleSubprogramInterface(const Symbol *proc) {
|
|
if (proc) {
|
|
if (const Symbol * submodule{proc->owner().symbol()}) {
|
|
if (const auto *details{submodule->detailsIf<ModuleDetails>()}) {
|
|
if (const Scope * ancestor{details->ancestor()}) {
|
|
const Symbol *iface{ancestor->FindSymbol(proc->name())};
|
|
if (IsSeparateModuleProcedureInterface(iface)) {
|
|
return iface;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// ComponentIterator implementation
|
|
|
|
template <ComponentKind componentKind>
|
|
typename ComponentIterator<componentKind>::const_iterator
|
|
ComponentIterator<componentKind>::const_iterator::Create(
|
|
const DerivedTypeSpec &derived) {
|
|
const_iterator it{};
|
|
it.componentPath_.emplace_back(derived);
|
|
it.Increment(); // cue up first relevant component, if any
|
|
return it;
|
|
}
|
|
|
|
template <ComponentKind componentKind>
|
|
const DerivedTypeSpec *
|
|
ComponentIterator<componentKind>::const_iterator::PlanComponentTraversal(
|
|
const Symbol &component) const {
|
|
if (const auto *details{component.detailsIf<ObjectEntityDetails>()}) {
|
|
if (const DeclTypeSpec * type{details->type()}) {
|
|
if (const auto *derived{type->AsDerived()}) {
|
|
bool traverse{false};
|
|
if constexpr (componentKind == ComponentKind::Ordered) {
|
|
// Order Component (only visit parents)
|
|
traverse = component.test(Symbol::Flag::ParentComp);
|
|
} else if constexpr (componentKind == ComponentKind::Direct) {
|
|
traverse = !IsAllocatableOrPointer(component);
|
|
} else if constexpr (componentKind == ComponentKind::Ultimate) {
|
|
traverse = !IsAllocatableOrPointer(component);
|
|
} else if constexpr (componentKind == ComponentKind::Potential) {
|
|
traverse = !IsPointer(component);
|
|
} else if constexpr (componentKind == ComponentKind::Scope) {
|
|
traverse = !IsAllocatableOrPointer(component);
|
|
}
|
|
if (traverse) {
|
|
const Symbol &newTypeSymbol{derived->typeSymbol()};
|
|
// Avoid infinite loop if the type is already part of the types
|
|
// being visited. It is possible to have "loops in type" because
|
|
// C744 does not forbid to use not yet declared type for
|
|
// ALLOCATABLE or POINTER components.
|
|
for (const auto &node : componentPath_) {
|
|
if (&newTypeSymbol == &node.GetTypeSymbol()) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
return derived;
|
|
}
|
|
}
|
|
} // intrinsic & unlimited polymorphic not traversable
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
template <ComponentKind componentKind>
|
|
static bool StopAtComponentPre(const Symbol &component) {
|
|
if constexpr (componentKind == ComponentKind::Ordered) {
|
|
// Parent components need to be iterated upon after their
|
|
// sub-components in structure constructor analysis.
|
|
return !component.test(Symbol::Flag::ParentComp);
|
|
} else if constexpr (componentKind == ComponentKind::Direct) {
|
|
return true;
|
|
} else if constexpr (componentKind == ComponentKind::Ultimate) {
|
|
return component.has<ProcEntityDetails>() ||
|
|
IsAllocatableOrPointer(component) ||
|
|
(component.get<ObjectEntityDetails>().type() &&
|
|
component.get<ObjectEntityDetails>().type()->AsIntrinsic());
|
|
} else if constexpr (componentKind == ComponentKind::Potential) {
|
|
return !IsPointer(component);
|
|
}
|
|
}
|
|
|
|
template <ComponentKind componentKind>
|
|
static bool StopAtComponentPost(const Symbol &component) {
|
|
return componentKind == ComponentKind::Ordered &&
|
|
component.test(Symbol::Flag::ParentComp);
|
|
}
|
|
|
|
template <ComponentKind componentKind>
|
|
void ComponentIterator<componentKind>::const_iterator::Increment() {
|
|
while (!componentPath_.empty()) {
|
|
ComponentPathNode &deepest{componentPath_.back()};
|
|
if (deepest.component()) {
|
|
if (!deepest.descended()) {
|
|
deepest.set_descended(true);
|
|
if (const DerivedTypeSpec *
|
|
derived{PlanComponentTraversal(*deepest.component())}) {
|
|
componentPath_.emplace_back(*derived);
|
|
continue;
|
|
}
|
|
} else if (!deepest.visited()) {
|
|
deepest.set_visited(true);
|
|
return; // this is the next component to visit, after descending
|
|
}
|
|
}
|
|
auto &nameIterator{deepest.nameIterator()};
|
|
if (nameIterator == deepest.nameEnd()) {
|
|
componentPath_.pop_back();
|
|
} else if constexpr (componentKind == ComponentKind::Scope) {
|
|
deepest.set_component(*nameIterator++->second);
|
|
deepest.set_descended(false);
|
|
deepest.set_visited(true);
|
|
return; // this is the next component to visit, before descending
|
|
} else {
|
|
const Scope &scope{deepest.GetScope()};
|
|
auto scopeIter{scope.find(*nameIterator++)};
|
|
if (scopeIter != scope.cend()) {
|
|
const Symbol &component{*scopeIter->second};
|
|
deepest.set_component(component);
|
|
deepest.set_descended(false);
|
|
if (StopAtComponentPre<componentKind>(component)) {
|
|
deepest.set_visited(true);
|
|
return; // this is the next component to visit, before descending
|
|
} else {
|
|
deepest.set_visited(!StopAtComponentPost<componentKind>(component));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
template <ComponentKind componentKind>
|
|
std::string
|
|
ComponentIterator<componentKind>::const_iterator::BuildResultDesignatorName()
|
|
const {
|
|
std::string designator{""};
|
|
for (const auto &node : componentPath_) {
|
|
designator += "%" + DEREF(node.component()).name().ToString();
|
|
}
|
|
return designator;
|
|
}
|
|
|
|
template class ComponentIterator<ComponentKind::Ordered>;
|
|
template class ComponentIterator<ComponentKind::Direct>;
|
|
template class ComponentIterator<ComponentKind::Ultimate>;
|
|
template class ComponentIterator<ComponentKind::Potential>;
|
|
template class ComponentIterator<ComponentKind::Scope>;
|
|
|
|
UltimateComponentIterator::const_iterator FindCoarrayUltimateComponent(
|
|
const DerivedTypeSpec &derived) {
|
|
UltimateComponentIterator ultimates{derived};
|
|
return std::find_if(ultimates.begin(), ultimates.end(), IsCoarray);
|
|
}
|
|
|
|
UltimateComponentIterator::const_iterator FindPointerUltimateComponent(
|
|
const DerivedTypeSpec &derived) {
|
|
UltimateComponentIterator ultimates{derived};
|
|
return std::find_if(ultimates.begin(), ultimates.end(), IsPointer);
|
|
}
|
|
|
|
PotentialComponentIterator::const_iterator FindEventOrLockPotentialComponent(
|
|
const DerivedTypeSpec &derived) {
|
|
PotentialComponentIterator potentials{derived};
|
|
return std::find_if(
|
|
potentials.begin(), potentials.end(), [](const Symbol &component) {
|
|
if (const auto *details{component.detailsIf<ObjectEntityDetails>()}) {
|
|
const DeclTypeSpec *type{details->type()};
|
|
return type && IsEventTypeOrLockType(type->AsDerived());
|
|
}
|
|
return false;
|
|
});
|
|
}
|
|
|
|
UltimateComponentIterator::const_iterator FindAllocatableUltimateComponent(
|
|
const DerivedTypeSpec &derived) {
|
|
UltimateComponentIterator ultimates{derived};
|
|
return std::find_if(ultimates.begin(), ultimates.end(), IsAllocatable);
|
|
}
|
|
|
|
UltimateComponentIterator::const_iterator
|
|
FindPolymorphicAllocatableUltimateComponent(const DerivedTypeSpec &derived) {
|
|
UltimateComponentIterator ultimates{derived};
|
|
return std::find_if(
|
|
ultimates.begin(), ultimates.end(), IsPolymorphicAllocatable);
|
|
}
|
|
|
|
UltimateComponentIterator::const_iterator
|
|
FindPolymorphicAllocatableNonCoarrayUltimateComponent(
|
|
const DerivedTypeSpec &derived) {
|
|
UltimateComponentIterator ultimates{derived};
|
|
return std::find_if(ultimates.begin(), ultimates.end(), [](const Symbol &x) {
|
|
return IsPolymorphicAllocatable(x) && !IsCoarray(x);
|
|
});
|
|
}
|
|
|
|
const Symbol *FindUltimateComponent(const DerivedTypeSpec &derived,
|
|
const std::function<bool(const Symbol &)> &predicate) {
|
|
UltimateComponentIterator ultimates{derived};
|
|
if (auto it{std::find_if(ultimates.begin(), ultimates.end(),
|
|
[&predicate](const Symbol &component) -> bool {
|
|
return predicate(component);
|
|
})}) {
|
|
return &*it;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
const Symbol *FindUltimateComponent(const Symbol &symbol,
|
|
const std::function<bool(const Symbol &)> &predicate) {
|
|
if (predicate(symbol)) {
|
|
return &symbol;
|
|
} else if (const auto *object{symbol.detailsIf<ObjectEntityDetails>()}) {
|
|
if (const auto *type{object->type()}) {
|
|
if (const auto *derived{type->AsDerived()}) {
|
|
return FindUltimateComponent(*derived, predicate);
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
const Symbol *FindImmediateComponent(const DerivedTypeSpec &type,
|
|
const std::function<bool(const Symbol &)> &predicate) {
|
|
if (const Scope * scope{type.scope()}) {
|
|
const Symbol *parent{nullptr};
|
|
for (const auto &pair : *scope) {
|
|
const Symbol *symbol{&*pair.second};
|
|
if (predicate(*symbol)) {
|
|
return symbol;
|
|
}
|
|
if (symbol->test(Symbol::Flag::ParentComp)) {
|
|
parent = symbol;
|
|
}
|
|
}
|
|
if (parent) {
|
|
if (const auto *object{parent->detailsIf<ObjectEntityDetails>()}) {
|
|
if (const auto *type{object->type()}) {
|
|
if (const auto *derived{type->AsDerived()}) {
|
|
return FindImmediateComponent(*derived, predicate);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
bool IsFunctionResultWithSameNameAsFunction(const Symbol &symbol) {
|
|
if (IsFunctionResult(symbol)) {
|
|
if (const Symbol * function{symbol.owner().symbol()}) {
|
|
return symbol.name() == function->name();
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void LabelEnforce::Post(const parser::GotoStmt &gotoStmt) {
|
|
checkLabelUse(gotoStmt.v);
|
|
}
|
|
void LabelEnforce::Post(const parser::ComputedGotoStmt &computedGotoStmt) {
|
|
for (auto &i : std::get<std::list<parser::Label>>(computedGotoStmt.t)) {
|
|
checkLabelUse(i);
|
|
}
|
|
}
|
|
|
|
void LabelEnforce::Post(const parser::ArithmeticIfStmt &arithmeticIfStmt) {
|
|
checkLabelUse(std::get<1>(arithmeticIfStmt.t));
|
|
checkLabelUse(std::get<2>(arithmeticIfStmt.t));
|
|
checkLabelUse(std::get<3>(arithmeticIfStmt.t));
|
|
}
|
|
|
|
void LabelEnforce::Post(const parser::AssignStmt &assignStmt) {
|
|
checkLabelUse(std::get<parser::Label>(assignStmt.t));
|
|
}
|
|
|
|
void LabelEnforce::Post(const parser::AssignedGotoStmt &assignedGotoStmt) {
|
|
for (auto &i : std::get<std::list<parser::Label>>(assignedGotoStmt.t)) {
|
|
checkLabelUse(i);
|
|
}
|
|
}
|
|
|
|
void LabelEnforce::Post(const parser::AltReturnSpec &altReturnSpec) {
|
|
checkLabelUse(altReturnSpec.v);
|
|
}
|
|
|
|
void LabelEnforce::Post(const parser::ErrLabel &errLabel) {
|
|
checkLabelUse(errLabel.v);
|
|
}
|
|
void LabelEnforce::Post(const parser::EndLabel &endLabel) {
|
|
checkLabelUse(endLabel.v);
|
|
}
|
|
void LabelEnforce::Post(const parser::EorLabel &eorLabel) {
|
|
checkLabelUse(eorLabel.v);
|
|
}
|
|
|
|
void LabelEnforce::checkLabelUse(const parser::Label &labelUsed) {
|
|
if (labels_.find(labelUsed) == labels_.end()) {
|
|
SayWithConstruct(context_, currentStatementSourcePosition_,
|
|
parser::MessageFormattedText{
|
|
"Control flow escapes from %s"_err_en_US, construct_},
|
|
constructSourcePosition_);
|
|
}
|
|
}
|
|
|
|
parser::MessageFormattedText LabelEnforce::GetEnclosingConstructMsg() {
|
|
return {"Enclosing %s statement"_en_US, construct_};
|
|
}
|
|
|
|
void LabelEnforce::SayWithConstruct(SemanticsContext &context,
|
|
parser::CharBlock stmtLocation, parser::MessageFormattedText &&message,
|
|
parser::CharBlock constructLocation) {
|
|
context.Say(stmtLocation, message)
|
|
.Attach(constructLocation, GetEnclosingConstructMsg());
|
|
}
|
|
|
|
bool HasAlternateReturns(const Symbol &subprogram) {
|
|
for (const auto *dummyArg : subprogram.get<SubprogramDetails>().dummyArgs()) {
|
|
if (!dummyArg) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
} // namespace Fortran::semantics
|