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| 1 | //===-- include/flang/Evaluate/formatting.h ---------------------*- C++ -*-===// |
|---|---|
| 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 | #ifndef FORTRAN_EVALUATE_FORMATTING_H_ |
| 10 | #define FORTRAN_EVALUATE_FORMATTING_H_ |
| 11 | |
| 12 | // It is inconvenient in C++ to have llvm::raw_ostream::operator<<() as a direct |
| 13 | // friend function of a class template with many instantiations, so the |
| 14 | // various representational class templates in lib/Evaluate format themselves |
| 15 | // via AsFortran(llvm::raw_ostream &) member functions, which the operator<<() |
| 16 | // overload below will call. Others have AsFortran() member functions that |
| 17 | // return strings. |
| 18 | // |
| 19 | // This header is meant to be included by the headers that define the several |
| 20 | // representational class templates that need it, not by external clients. |
| 21 | |
| 22 | #include "flang/Common/indirection.h" |
| 23 | #include "llvm/Support/raw_ostream.h" |
| 24 | #include <optional> |
| 25 | #include <type_traits> |
| 26 | |
| 27 | namespace Fortran::evaluate { |
| 28 | |
| 29 | template <typename A> |
| 30 | auto operator<<(llvm::raw_ostream &o, const A &x) -> decltype(x.AsFortran(o)) { |
| 31 | return x.AsFortran(o); |
| 32 | } |
| 33 | |
| 34 | template <typename A> |
| 35 | auto operator<<(llvm::raw_ostream &o, const A &x) |
| 36 | -> decltype(o << x.AsFortran()) { |
| 37 | return o << x.AsFortran(); |
| 38 | } |
| 39 | |
| 40 | template <typename A, bool COPYABLE> |
| 41 | auto operator<<( |
| 42 | llvm::raw_ostream &o, const Fortran::common::Indirection<A, COPYABLE> &x) |
| 43 | -> decltype(o << x.value()) { |
| 44 | return o << x.value(); |
| 45 | } |
| 46 | |
| 47 | template <typename A> |
| 48 | auto operator<<(llvm::raw_ostream &o, const std::optional<A> &x) |
| 49 | -> decltype(o << *x) { |
| 50 | if (x) { |
| 51 | o << *x; |
| 52 | } else { |
| 53 | o << "(nullopt)"; |
| 54 | } |
| 55 | return o; |
| 56 | } |
| 57 | } // namespace Fortran::evaluate |
| 58 | #endif // FORTRAN_EVALUATE_FORMATTING_H_ |
| 59 |
Warning: This file is not a C or C++ file. It does not have highlighting.