回答編集履歴
1
追記
answer
CHANGED
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@@ -39,4 +39,58 @@
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39
39
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std::cout << line << std::endl;
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40
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}
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41
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}
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42
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```
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43
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[追記] コンパイル単位を分けてみた:
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44
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```C++
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45
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// Module.h
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46
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#pragma once
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47
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48
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#include <string>
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49
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50
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int LoadModule(const std::string& path);
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51
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std::string GetLine(int handle);
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52
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```
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53
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54
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```C++
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55
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// Module.cpp
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56
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#include "Module.h"
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57
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#include <vector>
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58
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#include <fstream>
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59
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60
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namespace {
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class Module {
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std::ifstream stream_;
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public:
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Module(const std::string& path) : stream_(path) {}
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std::string get() { std::string line; std::getline(stream_, line); return line; }
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};
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68
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std::vector<Module> mods; // Module集合
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69
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}
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70
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71
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/* Moduleを生成し modsに追加。*/
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72
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int LoadModule(const std::string& path) {
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73
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int handle = mods.size();
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mods.emplace_back(path);
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75
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return handle;
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}
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77
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78
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/* Module::get() をcallする */
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std::string GetLine(int handle) {
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80
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return mods.at(handle).get();
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81
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}
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82
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```
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83
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84
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```C++
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85
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// foo.cpp
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86
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#include <iostream>
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87
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#include "Module.h"
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88
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89
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int main(){
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90
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int handle = LoadModule("foo.cpp");
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91
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for ( int i = 0; i < 4; ++i ) {
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92
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std::string line = GetLine(handle);
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93
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std::cout << line << std::endl;
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94
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}
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95
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}
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42
96
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```
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