| 1 | /*++ |
| 2 | |
| 3 | Copyright (c) Microsoft. All rights reserved. |
| 4 | |
| 5 | Module Name: |
| 6 | |
| 7 | Invocation.h |
| 8 | |
| 9 | Abstract: |
| 10 | |
| 11 | Header file for walking through and processing a command line invocation. |
| 12 | |
| 13 | --*/ |
| 14 | #pragma once |
| 15 | #include <string> |
| 16 | #include <vector> |
| 17 | |
| 18 | namespace wsl::windows::wslc { |
| 19 | struct Invocation |
| 20 | { |
| 21 | Invocation(std::vector<std::wstring>&& args) : m_args(std::move(args)) |
| 22 | { |
| 23 | } |
| 24 | |
| 25 | struct iterator |
| 26 | { |
| 27 | iterator(size_t arg, std::vector<std::wstring>& args) : m_arg(arg), m_args(args) |
| 28 | { |
| 29 | } |
| 30 | |
| 31 | iterator(const iterator&) = default; |
| 32 | iterator& operator=(const iterator&) = default; |
| 33 | |
| 34 | iterator operator++() |
| 35 | { |
| 36 | return {++m_arg, m_args}; |
| 37 | } |
| 38 | iterator operator++(int) |
| 39 | { |
| 40 | return {m_arg++, m_args}; |
| 41 | } |
| 42 | iterator operator--() |
| 43 | { |
| 44 | return {--m_arg, m_args}; |
| 45 | } |
| 46 | iterator operator--(int) |
| 47 | { |
| 48 | return {m_arg--, m_args}; |
| 49 | } |
| 50 | |
| 51 | bool operator==(const iterator& other) const |
| 52 | { |
| 53 | return m_arg == other.m_arg; |
| 54 | } |
| 55 | bool operator!=(const iterator& other) const |
| 56 | { |
| 57 | return m_arg != other.m_arg; |
| 58 | } |
| 59 | |
| 60 | const std::wstring& operator*() const |
| 61 | { |
| 62 | return m_args[m_arg]; |
| 63 | } |
| 64 | const std::wstring* operator->() const |
| 65 | { |
| 66 | return &(m_args[m_arg]); |
| 67 | } |
| 68 | |
| 69 | size_t index() const |
| 70 | { |
| 71 | return m_arg; |
| 72 | } |
| 73 | |
| 74 | private: |
| 75 | size_t m_arg; |
| 76 | std::vector<std::wstring>& m_args; |
| 77 | }; |
| 78 | |
| 79 | size_t size() const |
| 80 | { |
| 81 | return m_args.size(); |
| 82 | } |
| 83 | iterator begin() |
| 84 | { |
| 85 | return {m_currentFirstArg, m_args}; |
| 86 | } |
| 87 | iterator end() |
| 88 | { |
| 89 | return {m_args.size(), m_args}; |
| 90 | } |
| 91 | // Marks i as consumed: the next begin() returns i + 1. |
| 92 | void consume(const iterator& i) |
| 93 | { |
| 94 | m_currentFirstArg = i.index() + 1; |
| 95 | } |
| 96 | // Sets the start of the unconsumed range to i: the next begin() returns i. |
| 97 | // Use this when a parser stopped at an unconsumed token (e.g. options-only |
| 98 | // parsing that stopped on the first positional / subcommand token). |
| 99 | void consumeUntil(const iterator& i) |
| 100 | { |
| 101 | m_currentFirstArg = i.index(); |
| 102 | } |
| 103 | |
| 104 | private: |
| 105 | std::vector<std::wstring> m_args; |
| 106 | size_t m_currentFirstArg = 0; |
| 107 | }; |
| 108 | } // namespace wsl::windows::wslc |