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//===--- Annotations.h - Annotated source code for tests ---------*- C++-*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TESTING_SUPPORT_ANNOTATIONS_H
#define LLVM_TESTING_SUPPORT_ANNOTATIONS_H
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include <tuple>
#include <vector>
namespace llvm {
class raw_ostream;
/// Annotations lets you mark points and ranges inside source code, for tests:
///
/// Annotations Example(R"cpp(
/// int complete() { x.pri^ } // ^ indicates a point
/// void err() { [["hello" == 42]]; } // [[this is a range]]
/// $definition^class Foo{}; // points can be named: "definition"
/// $fail[[static_assert(false, "")]] // ranges can be named too: "fail"
/// )cpp");
///
/// StringRef Code = Example.code(); // annotations stripped.
/// std::vector<size_t> PP = Example.points(); // all unnamed points
/// size_t P = Example.point(); // there must be exactly one
/// llvm::Range R = Example.range("fail"); // find named ranges
///
/// Points/ranges are coordinated into `code()` which is stripped of
/// annotations.
///
/// Ranges may be nested (and points can be inside ranges), but there's no way
/// to define general overlapping ranges.
///
/// FIXME: the choice of the marking syntax makes it impossible to represent
/// some of the C++ and Objective C constructs (including common ones
/// like C++ attributes). We can fix this by:
/// 1. introducing an escaping mechanism for the special characters,
/// 2. making characters for marking points and ranges configurable,
/// 3. changing the syntax to something less commonly used,
/// 4. ...
class Annotations {
public:
/// Two offsets pointing to a continuous substring. End is not included, i.e.
/// represents a half-open range.
struct Range {
size_t Begin = 0;
size_t End = 0;
friend bool operator==(const Range &L, const Range &R) {
return std::tie(L.Begin, L.End) == std::tie(R.Begin, R.End);
}
friend bool operator!=(const Range &L, const Range &R) { return !(L == R); }
};
/// Parses the annotations from Text. Crashes if it's malformed.
Annotations(llvm::StringRef Text);
/// The input text with all annotations stripped.
/// All points and ranges are relative to this stripped text.
llvm::StringRef code() const { return Code; }
/// Returns the position of the point marked by ^ (or $name^) in the text.
/// Crashes if there isn't exactly one.
size_t point(llvm::StringRef Name = "") const;
/// Returns the position of all points marked by ^ (or $name^) in the text.
/// Order matches the order within the text.
std::vector<size_t> points(llvm::StringRef Name = "") const;
/// Returns the location of the range marked by [[ ]] (or $name[[ ]]).
/// Crashes if there isn't exactly one.
Range range(llvm::StringRef Name = "") const;
/// Returns the location of all ranges marked by [[ ]] (or $name[[ ]]).
/// They are ordered by start position within the text.
std::vector<Range> ranges(llvm::StringRef Name = "") const;
private:
std::string Code;
llvm::StringMap<llvm::SmallVector<size_t, 1>> Points;
llvm::StringMap<llvm::SmallVector<Range, 1>> Ranges;
};
llvm::raw_ostream &operator<<(llvm::raw_ostream &O,
const llvm::Annotations::Range &R);
} // namespace llvm
#endif
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