1 //===-- lib/Evaluate/common.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 "flang/Evaluate/common.h"
10 #include "flang/Common/idioms.h"
11 
12 using namespace Fortran::parser::literals;
13 
14 namespace Fortran::evaluate {
15 
16 void RealFlagWarnings(
17     FoldingContext &context, const RealFlags &flags, const char *operation) {
18   if (flags.test(RealFlag::Overflow)) {
19     context.messages().Say("overflow on %s"_en_US, operation);
20   }
21   if (flags.test(RealFlag::DivideByZero)) {
22     if (std::strcmp(operation, "division") == 0) {
23       context.messages().Say("division by zero"_en_US);
24     } else {
25       context.messages().Say("division on %s"_en_US);
26     }
27   }
28   if (flags.test(RealFlag::InvalidArgument)) {
29     context.messages().Say("invalid argument on %s"_en_US, operation);
30   }
31   if (flags.test(RealFlag::Underflow)) {
32     context.messages().Say("underflow on %s"_en_US, operation);
33   }
34 }
35 
36 ConstantSubscript &FoldingContext::StartImpliedDo(
37     parser::CharBlock name, ConstantSubscript n) {
38   auto pair{impliedDos_.insert(std::make_pair(name, n))};
39   CHECK(pair.second);
40   return pair.first->second;
41 }
42 
43 std::optional<ConstantSubscript> FoldingContext::GetImpliedDo(
44     parser::CharBlock name) const {
45   if (auto iter{impliedDos_.find(name)}; iter != impliedDos_.cend()) {
46     return {iter->second};
47   } else {
48     return std::nullopt;
49   }
50 }
51 
52 void FoldingContext::EndImpliedDo(parser::CharBlock name) {
53   auto iter{impliedDos_.find(name)};
54   if (iter != impliedDos_.end()) {
55     impliedDos_.erase(iter);
56   }
57 }
58 } // namespace Fortran::evaluate
59