1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
#pragma once
#include "pre.hpp"
#include "base.hpp"
namespace cru::util {
namespace details {
template <typename T>
struct TypeTag {};
constexpr StringView PlaceHolder(TypeTag<String>) { return StringView(L"{}"); }
constexpr MultiByteStringView PlaceHolder(TypeTag<MultiByteString>) {
return MultiByteStringView("{}");
}
template <typename TString>
void FormatInternal(TString& string) {
const auto find_result = string.find(PlaceHolder(TypeTag<TString>{}));
if (find_result != TString::npos)
throw std::invalid_argument("There is more placeholders than args.");
}
template <typename TString, typename T, typename... TRest>
void FormatInternal(TString& string, const T& arg, const TRest&... args) {
const auto find_result = string.find(PlaceHolder(TypeTag<TString>{}));
if (find_result == TString::npos)
throw std::invalid_argument("There is less placeholders than args.");
string.replace(find_result, 2, FormatToString(arg, TypeTag<TString>{}));
FormatInternal<TString>(string, args...);
}
} // namespace details
template <typename... T>
String Format(const StringView& format, const T&... args) {
String result(format);
details::FormatInternal<String>(result, args...);
return result;
}
template <typename... T>
MultiByteString Format(const MultiByteStringView& format, const T&... args) {
MultiByteString result(format);
details::FormatInternal<MultiByteString>(result, args...);
return result;
}
#define CRU_FORMAT_NUMBER(type) \
inline String FormatToString(const type number, details::TypeTag<String>) { \
return std::to_wstring(number); \
} \
inline MultiByteString FormatToString(const type number, \
details::TypeTag<MultiByteString>) { \
return std::to_string(number); \
}
CRU_FORMAT_NUMBER(int)
CRU_FORMAT_NUMBER(short)
CRU_FORMAT_NUMBER(long)
CRU_FORMAT_NUMBER(long long)
CRU_FORMAT_NUMBER(unsigned int)
CRU_FORMAT_NUMBER(unsigned short)
CRU_FORMAT_NUMBER(unsigned long)
CRU_FORMAT_NUMBER(unsigned long long)
CRU_FORMAT_NUMBER(float)
CRU_FORMAT_NUMBER(double)
#undef CRU_FORMAT_NUMBER
inline StringView FormatToString(const String& string,
details::TypeTag<String>) {
return string;
}
inline MultiByteString FormatToString(const MultiByteString& string,
details::TypeTag<MultiByteString>) {
return string;
}
inline StringView FormatToString(const StringView& string,
details::TypeTag<String>) {
return string;
}
inline MultiByteStringView FormatToString(const MultiByteStringView& string,
details::TypeTag<MultiByteString>) {
return string;
}
inline StringView FormatToString(const wchar_t* string,
details::TypeTag<String>) {
return StringView(string);
}
inline MultiByteStringView FormatToString(const char* string,
details::TypeTag<MultiByteString>) {
return MultiByteString(string);
}
} // namespace cru::util
|
