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util/TemplateString: no indent after namespace

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Max Kellermann 2020-10-23 11:23:50 +02:00 committed by Max Kellermann
parent 79fd6143ec
commit 0dda4c06b1
1 changed files with 76 additions and 74 deletions
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90
src/util/TemplateString.hxx
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@ -1,5 +1,5 @@
/* /*
* Copyright (C) 2015-2016 Max Kellermann <max.kellermann@gmail.com> * Copyright 2015-2020 Max Kellermann <max.kellermann@gmail.com>
* *
* Redistribution and use in source and binary forms, with or without * Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions * modification, are permitted provided that the following conditions
@ -33,94 +33,96 @@
#include <cstddef> #include <cstddef>
namespace TemplateString { namespace TemplateString {
/**
/**
* Construct a null-terminated string from a list of chars. * Construct a null-terminated string from a list of chars.
*/ */
template<char... _value> template<char... _value>
struct Construct { struct Construct {
static constexpr char value[] = {_value..., 0}; static constexpr char value[] = {_value..., 0};
static constexpr size_t size = sizeof...(_value); static constexpr size_t size = sizeof...(_value);
}; };
template<char... _value> template<char... _value>
constexpr char Construct<_value...>::value[]; constexpr char Construct<_value...>::value[];
/** /**
* An empty string. * An empty string.
*/ */
struct Empty : Construct<> {}; struct Empty : Construct<> {};
/** /**
* A string consisting of a single character. * A string consisting of a single character.
*/ */
template<char ch> template<char ch>
struct CharAsString : Construct<ch> {}; struct CharAsString : Construct<ch> {};
/** /**
* Invoke #F, pass all characters in #src from #i to #length * Invoke #F, pass all characters in #src from #i to #length
* as variadic arguments. * as variadic arguments.
*/ */
template<template<char...> class F, template<template<char...> class F,
const char *src, size_t length, size_t i, const char *src, size_t length, size_t i,
char... _value> char... _value>
struct VariadicChars : VariadicChars<F, src, length - 1, i + 1, _value..., src[i]> { struct VariadicChars : VariadicChars<F, src, length - 1, i + 1, _value..., src[i]> {
static_assert(length > 0, "Wrong length"); static_assert(length > 0, "Wrong length");
}; };
template<template<char...> class F, template<template<char...> class F,
const char *src, size_t length, const char *src, size_t length,
char... _value> char... _value>
struct VariadicChars<F, src, 0, length, _value...> : F<_value...> {}; struct VariadicChars<F, src, 0, length, _value...> : F<_value...> {};
/** /**
* Like #VariadicChars, but pass an additional argument to #F. * Like #VariadicChars, but pass an additional argument to #F.
*/ */
template<template<typename Arg, char...> class F, typename Arg, template<template<typename Arg, char...> class F, typename Arg,
const char *src, size_t length, size_t i, const char *src, size_t length, size_t i,
char... _value> char... _value>
struct VariadicChars1 : VariadicChars1<F, Arg, struct VariadicChars1 : VariadicChars1<F, Arg,
src, length - 1, i + 1, _value..., src[i]> { src, length - 1, i + 1, _value..., src[i]> {
static_assert(length > 0, "Wrong length"); static_assert(length > 0, "Wrong length");
}; };
template<template<typename Arg, char...> class F, typename Arg, template<template<typename Arg, char...> class F, typename Arg,
const char *src, size_t length, const char *src, size_t length,
char... _value> char... _value>
struct VariadicChars1<F, Arg, src, 0, length, _value...> : F<Arg, _value...> {}; struct VariadicChars1<F, Arg, src, 0, length, _value...> : F<Arg, _value...> {};
template<const char *src, size_t length, char... value> template<const char *src, size_t length, char... value>
struct _BuildString : VariadicChars<Construct, src, length, 0, struct _BuildString : VariadicChars<Construct, src, length, 0,
value...> {}; value...> {};
template<char ch, typename S> template<char ch, typename S>
struct InsertBefore : _BuildString<S::value, S::size, ch> {}; struct InsertBefore : _BuildString<S::value, S::size, ch> {};
/** /**
* Concatenate several strings. * Concatenate several strings.
*/ */
template<typename... Args> template<typename... Args>
struct Concat; struct Concat;
template<typename First, typename Second, typename... Args> template<typename First, typename Second, typename... Args>
struct _Concat : Concat<Concat<First, Second>, Args...> {}; struct _Concat : Concat<Concat<First, Second>, Args...> {};
template<typename... Args> template<typename... Args>
struct Concat : _Concat<Args...> {}; struct Concat : _Concat<Args...> {};
template<typename Second, char... _value> template<typename Second, char... _value>
struct _Concat2 : _BuildString<Second::value, Second::size, struct _Concat2 : _BuildString<Second::value, Second::size,
_value...> {}; _value...> {};
template<typename First, typename Second> template<typename First, typename Second>
struct Concat<First, Second> struct Concat<First, Second>
:VariadicChars1<_Concat2, Second, :VariadicChars1<_Concat2, Second,
First::value, First::size, 0> {}; First::value, First::size, 0> {};
template<typename First> template<typename First>
struct Concat<First> : First {}; struct Concat<First> : First {};
template<> template<>
struct Concat<> : Empty {}; struct Concat<> : Empty {};
}
} // namespace TemplateString
#endif #endif