1//===-- lib/Semantics/check-arithmeticif.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-arithmeticif.h"
10#include "flang/Parser/message.h"
11#include "flang/Parser/parse-tree.h"
12#include "flang/Semantics/tools.h"
13
14namespace Fortran::semantics {
15
16bool IsNumericExpr(const SomeExpr &expr) {
17 auto dynamicType{expr.GetType()};
18 return dynamicType && common::IsNumericTypeCategory(dynamicType->category());
19}
20
21void ArithmeticIfStmtChecker::Leave(
22 const parser::ArithmeticIfStmt &arithmeticIfStmt) {
23 // Arithmetic IF statements have been removed from Fortran 2018.
24 // The constraints and requirements here refer to the 2008 spec.
25 // R853 Check for a scalar-numeric-expr
26 // C849 that shall not be of type complex.
27 auto &parsedExpr{std::get<parser::Expr>(arithmeticIfStmt.t)};
28 if (const auto *expr{GetExpr(context_, parsedExpr)}) {
29 if (expr->Rank() > 0) {
30 context_.Say(parsedExpr.source,
31 "ARITHMETIC IF expression must be a scalar expression"_err_en_US);
32 } else if (ExprHasTypeCategory(*expr, common::TypeCategory::Complex)) {
33 context_.Say(parsedExpr.source,
34 "ARITHMETIC IF expression must not be a COMPLEX expression"_err_en_US);
35 } else if (ExprHasTypeCategory(*expr, common::TypeCategory::Unsigned)) {
36 context_.Say(parsedExpr.source,
37 "ARITHMETIC IF expression must not be an UNSIGNED expression"_err_en_US);
38 } else if (!IsNumericExpr(*expr)) {
39 context_.Say(parsedExpr.source,
40 "ARITHMETIC IF expression must be a numeric expression"_err_en_US);
41 }
42 }
43 // The labels have already been checked in resolve-labels.
44 // TODO: Really? Check that they are really branch target
45 // statements and in the same inclusive scope.
46}
47
48} // namespace Fortran::semantics
49

source code of flang/lib/Semantics/check-arithmeticif.cpp