================ @@ -0,0 +1,156 @@ +//===-- DILLexer.h ----------------------------------------------*- 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 LLDB_VALUEOBJECT_DILLEXER_H_ +#define LLDB_VALUEOBJECT_DILLEXER_H_ + +#include "llvm/ADT/StringRef.h" +#include <cstdint> +#include <limits.h> +#include <memory> +#include <string> +#include <vector> + +namespace lldb_private { + +namespace dil { + +enum class TokenKind { + coloncolon, + eof, + identifier, + invalid, + kw_namespace, + l_paren, + none, + r_paren, + unknown, +}; + +/// Class defining the tokens generated by the DIL lexer and used by the +/// DIL parser. +class DILToken { +public: + DILToken(dil::TokenKind kind, std::string spelling, uint32_t start) + : m_kind(kind), m_spelling(spelling), m_start_pos(start) {} + + DILToken() : m_kind(dil::TokenKind::none), m_spelling(""), m_start_pos(0) {} + + void setKind(dil::TokenKind kind) { m_kind = kind; } + dil::TokenKind getKind() const { return m_kind; } + + std::string getSpelling() const { return m_spelling; } + + uint32_t getLength() const { return m_spelling.size(); } + + bool is(dil::TokenKind kind) const { return m_kind == kind; } + + bool isNot(dil::TokenKind kind) const { return m_kind != kind; } + + bool isOneOf(dil::TokenKind kind1, dil::TokenKind kind2) const { + return is(kind1) || is(kind2); + } + + template <typename... Ts> bool isOneOf(dil::TokenKind kind, Ts... Ks) const { + return is(kind) || isOneOf(Ks...); + } + + uint32_t getLocation() const { return m_start_pos; } + + void setValues(dil::TokenKind kind, std::string spelling, uint32_t start) { + m_kind = kind; + m_spelling = spelling; + m_start_pos = start; + } + + static const std::string getTokenName(dil::TokenKind kind); + +private: + dil::TokenKind m_kind; + std::string m_spelling; + uint32_t m_start_pos; // within entire expression string +}; + +/// Class for doing the simple lexing required by DIL. +class DILLexer { +public: + DILLexer(llvm::StringRef dil_expr) : m_expr(dil_expr.str()) { + m_cur_pos = m_expr.begin(); + // Use UINT_MAX to indicate invalid/uninitialized value. + m_tokens_idx = UINT_MAX; + } + + bool Lex(DILToken &result, bool look_ahead = false); + + bool Is_Word(std::string::iterator start, uint32_t &length); + + uint32_t GetLocation() { return m_cur_pos - m_expr.begin(); } + + /// Update 'result' with the other paremeter values, create a + /// duplicate token, and push the duplicate token onto the vector of + /// lexed tokens. + void UpdateLexedTokens(DILToken &result, dil::TokenKind tok_kind, ---------------- labath wrote:
Should all of these APIs really be public? https://github.com/llvm/llvm-project/pull/123521 _______________________________________________ lldb-commits mailing list lldb-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
