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//==-- SemanticHighlighting.h - Generating highlights from the AST-- 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
//
//===----------------------------------------------------------------------===//
//
// An implementation of semantic highlighting based on this proposal:
// https://github.com/microsoft/vscode-languageserver-node/pull/367 in clangd.
// Semantic highlightings are calculated for an AST by visiting every AST node
// and classifying nodes that are interesting to highlight (variables/function
// calls etc.).
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_SEMANTICHIGHLIGHTING_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANGD_SEMANTICHIGHLIGHTING_H
#include "ClangdUnit.h"
#include "Protocol.h"
namespace clang {
namespace clangd {
enum class HighlightingKind {
Variable = 0,
Function = 1,
};
// Contains all information needed for the highlighting a token.
struct HighlightingToken {
HighlightingKind Kind;
Range R;
};
bool operator==(const HighlightingToken &Lhs, const HighlightingToken &Rhs);
// Returns all HighlightingTokens from an AST. Only generates highlights for the
// main AST.
std::vector<HighlightingToken> getSemanticHighlightings(ParsedAST &AST);
// Gets the TextMate scopes as a double nested array where the
// SemanticHighlightKind indexes correctly into this vector.
std::vector<std::vector<std::string>> getTextMateScopeLookupTable();
// Convert to LSP's semantic highlighting information.
std::vector<SemanticHighlightingInformation>
toSemanticHighlightingInformation(llvm::ArrayRef<HighlightingToken> Tokens);
} // namespace clangd
} // namespace clang
#endif
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