1 //===-- lib/Semantics/check-deallocate.cpp --------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "check-deallocate.h"
10 #include "flang/Parser/message.h"
11 #include "flang/Parser/parse-tree.h"
12 #include "flang/Semantics/expression.h"
13 #include "flang/Semantics/tools.h"
14
15 namespace Fortran::semantics {
16
Leave(const parser::DeallocateStmt & deallocateStmt)17 void DeallocateChecker::Leave(const parser::DeallocateStmt &deallocateStmt) {
18 for (const parser::AllocateObject &allocateObject :
19 std::get<std::list<parser::AllocateObject>>(deallocateStmt.t)) {
20 common::visit(
21 common::visitors{
22 [&](const parser::Name &name) {
23 auto const *symbol{name.symbol};
24 if (context_.HasError(symbol)) {
25 // already reported an error
26 } else if (!IsVariableName(*symbol)) {
27 context_.Say(name.source,
28 "name in DEALLOCATE statement must be a variable name"_err_en_US);
29 } else if (!IsAllocatableOrPointer(*symbol)) { // C932
30 context_.Say(name.source,
31 "name in DEALLOCATE statement must have the ALLOCATABLE or POINTER attribute"_err_en_US);
32 } else {
33 context_.CheckIndexVarRedefine(name);
34 }
35 },
36 [&](const parser::StructureComponent &structureComponent) {
37 // Only perform structureComponent checks it was successfully
38 // analyzed in expression analysis.
39 if (GetExpr(context_, allocateObject)) {
40 if (!IsAllocatableOrPointer(
41 *structureComponent.component.symbol)) { // C932
42 context_.Say(structureComponent.component.source,
43 "component in DEALLOCATE statement must have the ALLOCATABLE or POINTER attribute"_err_en_US);
44 }
45 }
46 },
47 },
48 allocateObject.u);
49 }
50 bool gotStat{false}, gotMsg{false};
51 for (const parser::StatOrErrmsg &deallocOpt :
52 std::get<std::list<parser::StatOrErrmsg>>(deallocateStmt.t)) {
53 common::visit(
54 common::visitors{
55 [&](const parser::StatVariable &) {
56 if (gotStat) {
57 context_.Say(
58 "STAT may not be duplicated in a DEALLOCATE statement"_err_en_US);
59 }
60 gotStat = true;
61 },
62 [&](const parser::MsgVariable &) {
63 if (gotMsg) {
64 context_.Say(
65 "ERRMSG may not be duplicated in a DEALLOCATE statement"_err_en_US);
66 }
67 gotMsg = true;
68 },
69 },
70 deallocOpt.u);
71 }
72 }
73 } // namespace Fortran::semantics
74