//===--- 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"
/// $(foo)^class Foo{}; // ...or have a payload: "foo"
/// $definition(foo)^class Foo{}; // ...or both
/// $fail(runtime)[[assert(false)]] // ranges can have names/payloads too
/// )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.
///
/// Names consist of only alphanumeric characters or '_'.
/// Payloads can contain any character expect '(' and ')'.
///
/// 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 the point with \p Name and its payload (if any).
std::pair<size_t, llvm::StringRef>
pointWithPayload(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 positions and payloads (if any) of all points named \p Name
std::vector<std::pair<size_t, llvm::StringRef>>
pointsWithPayload(llvm::StringRef Name = "") const;
/// Returns the mapping of all names of points marked in the text to their
/// position. Unnamed points are mapped to the empty string. The positions are
/// sorted.
/// FIXME Remove this and expose `All` directly (currently used out-of-tree)
llvm::StringMap<llvm::SmallVector<size_t, 1>> all_points() 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 and payload of the range marked by [[ ]]
/// (or $name(payload)[[ ]]). Crashes if there isn't exactly one.
std::pair<Range, llvm::StringRef>
rangeWithPayload(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;
/// Returns the location of all ranges marked by [[ ]]
/// (or $name(payload)[[ ]]).
/// They are ordered by start position within the text.
std::vector<std::pair<Range, llvm::StringRef>>
rangesWithPayload(llvm::StringRef Name = "") const;
/// Returns the mapping of all names of ranges marked in the text to their
/// location. Unnamed ranges are mapped to the empty string. The ranges are
/// sorted by their start position.
llvm::StringMap<llvm::SmallVector<Range, 1>> all_ranges() const;
private:
std::string Code;
/// Either a Point (Only Start) or a Range (Start and End)
struct Annotation {
size_t Begin;
size_t End = -1;
bool isPoint() const { return End == size_t(-1); }
llvm::StringRef Name;
llvm::StringRef Payload;
};
std::vector<Annotation> All;
// Values are the indices into All
llvm::StringMap<llvm::SmallVector<size_t, 1>> Points;
llvm::StringMap<llvm::SmallVector<size_t, 1>> Ranges;
};
llvm::raw_ostream &operator<<(llvm::raw_ostream &O,
const llvm::Annotations::Range &R);
} // namespace llvm
#endif