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//===-- lib/Semantics/check-deallocate.cpp --------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "check-deallocate.h"
#include "flang/Parser/message.h"
#include "flang/Parser/parse-tree.h"
#include "flang/Semantics/expression.h"
#include "flang/Semantics/tools.h"
namespace Fortran::semantics {
void DeallocateChecker::Leave(const parser::DeallocateStmt &deallocateStmt) {
for (const parser::AllocateObject &allocateObject :
std::get<std::list<parser::AllocateObject>>(deallocateStmt.t)) {
std::visit(
common::visitors{
[&](const parser::Name &name) {
auto const *symbol{name.symbol};
if (context_.HasError(symbol)) {
// already reported an error
} else if (!IsVariableName(*symbol)) {
context_.Say(name.source,
"name in DEALLOCATE statement must be a variable name"_err_en_US);
} else if (!IsAllocatableOrPointer(*symbol)) { // C932
context_.Say(name.source,
"name in DEALLOCATE statement must have the ALLOCATABLE or POINTER attribute"_err_en_US);
} else {
context_.CheckIndexVarRedefine(name);
}
},
[&](const parser::StructureComponent &structureComponent) {
evaluate::ExpressionAnalyzer analyzer{context_};
if (MaybeExpr checked{analyzer.Analyze(structureComponent)}) {
if (!IsAllocatableOrPointer(
*structureComponent.component.symbol)) { // C932
context_.Say(structureComponent.component.source,
"component in DEALLOCATE statement must have the ALLOCATABLE or POINTER attribute"_err_en_US);
}
}
},
},
allocateObject.u);
}
bool gotStat{false}, gotMsg{false};
for (const parser::StatOrErrmsg &deallocOpt :
std::get<std::list<parser::StatOrErrmsg>>(deallocateStmt.t)) {
std::visit(
common::visitors{
[&](const parser::StatVariable &) {
if (gotStat) {
context_.Say(
"STAT may not be duplicated in a DEALLOCATE statement"_err_en_US);
}
gotStat = true;
},
[&](const parser::MsgVariable &) {
if (gotMsg) {
context_.Say(
"ERRMSG may not be duplicated in a DEALLOCATE statement"_err_en_US);
}
gotMsg = true;
},
},
deallocOpt.u);
}
}
} // namespace Fortran::semantics
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