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0b57cec536
This uses the new layout of the upstream repository, which was recently migrated to GitHub, and converted into a "monorepo". That is, most of the earlier separate sub-projects with their own branches and tags were consolidated into one top-level directory, and are now branched and tagged together. Updating the vendor area to match this layout is next.
84 lines
1.8 KiB
C++
84 lines
1.8 KiB
C++
//===--------------------- StringLexer.cpp -----------------------*- C++-*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Utility/StringLexer.h"
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#include <algorithm>
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#include <assert.h>
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using namespace lldb_utility;
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StringLexer::StringLexer(std::string s) : m_data(s), m_position(0) {}
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StringLexer::Character StringLexer::Peek() { return m_data[m_position]; }
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bool StringLexer::NextIf(Character c) {
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auto val = Peek();
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if (val == c) {
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Next();
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return true;
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}
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return false;
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}
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std::pair<bool, StringLexer::Character>
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StringLexer::NextIf(std::initializer_list<Character> cs) {
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auto val = Peek();
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for (auto c : cs) {
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if (val == c) {
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Next();
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return {true, c};
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}
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}
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return {false, 0};
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}
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bool StringLexer::AdvanceIf(const std::string &token) {
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auto pos = m_position;
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bool matches = true;
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for (auto c : token) {
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if (!NextIf(c)) {
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matches = false;
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break;
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}
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}
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if (!matches) {
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m_position = pos;
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return false;
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}
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return true;
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}
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StringLexer::Character StringLexer::Next() {
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auto val = Peek();
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Consume();
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return val;
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}
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bool StringLexer::HasAtLeast(Size s) {
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return (m_data.size() - m_position) >= s;
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}
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void StringLexer::PutBack(Size s) {
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assert(m_position >= s);
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m_position -= s;
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}
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std::string StringLexer::GetUnlexed() {
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return std::string(m_data, m_position);
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}
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void StringLexer::Consume() { m_position++; }
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StringLexer &StringLexer::operator=(const StringLexer &rhs) {
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if (this != &rhs) {
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m_data = rhs.m_data;
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m_position = rhs.m_position;
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}
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return *this;
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}
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