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
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/*
* Copyright (c) 2020, Emanuel Sprung <emanuel.sprung@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Types.h>
#include <stdio.h>
#ifdef __serenity__
# include <bits/regex_defs.h>
#else
# include <LibC/bits/regex_defs.h>
#endif
namespace regex {
using FlagsUnderlyingType = u32;
enum class AllFlags {
Global = __Regex_Global, // All matches (don't return after first match)
Insensitive = __Regex_Insensitive, // Case insensitive match (ignores case of [a-zA-Z])
Ungreedy = __Regex_Ungreedy, // The match becomes lazy by default. Now a ? following a quantifier makes it greedy
Unicode = __Regex_Unicode, // Enable all unicode features and interpret all unicode escape sequences as such
Extended = __Regex_Extended, // Ignore whitespaces. Spaces and text after a # in the pattern are ignored
Extra = __Regex_Extra, // Disallow meaningless escapes. A \ followed by a letter with no special meaning is faulted
MatchNotBeginOfLine = __Regex_MatchNotBeginOfLine, // Pattern is not forced to ^ -> search in whole string!
MatchNotEndOfLine = __Regex_MatchNotEndOfLine, // Don't Force the dollar sign, $, to always match end of the string, instead of end of the line. This option is ignored if the Multiline-flag is set
SkipSubExprResults = __Regex_SkipSubExprResults, // Do not return sub expressions in the result
StringCopyMatches = __Regex_StringCopyMatches, // Do explicitly copy results into new allocated string instead of StringView to original string.
SingleLine = __Regex_SingleLine, // Dot matches newline characters
Sticky = __Regex_Sticky, // Force the pattern to only match consecutive matches from where the previous match ended.
Multiline = __Regex_Multiline, // Handle newline characters. Match each line, one by one.
SkipTrimEmptyMatches = __Regex_SkipTrimEmptyMatches, // Do not remove empty capture group results.
SingleMatch = __Regex_SingleMatch, // Stop after acquiring a single match.
UnicodeSets = __Regex_UnicodeSets, // Only for ECMA262, Allow set operations in character classes.
Internal_Stateful = __Regex_Internal_Stateful, // Make global matches match one result at a time, and further match() calls on the same instance continue where the previous one left off.
Internal_BrowserExtended = __Regex_Internal_BrowserExtended, // Only for ECMA262, Enable the behaviors defined in section B.1.4. of the ECMA262 spec.
Internal_ConsiderNewline = __Regex_Internal_ConsiderNewline, // Only for ECMA262, Allow multiline matches to consider newlines as line boundaries.
Last = Internal_BrowserExtended,
};
enum class PosixFlags : FlagsUnderlyingType {
Global = (FlagsUnderlyingType)AllFlags::Global,
Insensitive = (FlagsUnderlyingType)AllFlags::Insensitive,
Ungreedy = (FlagsUnderlyingType)AllFlags::Ungreedy,
Unicode = (FlagsUnderlyingType)AllFlags::Unicode,
Extended = (FlagsUnderlyingType)AllFlags::Extended,
Extra = (FlagsUnderlyingType)AllFlags::Extra,
MatchNotBeginOfLine = (FlagsUnderlyingType)AllFlags::MatchNotBeginOfLine,
MatchNotEndOfLine = (FlagsUnderlyingType)AllFlags::MatchNotEndOfLine,
SkipSubExprResults = (FlagsUnderlyingType)AllFlags::SkipSubExprResults,
SkipTrimEmptyMatches = (FlagsUnderlyingType)AllFlags::SkipTrimEmptyMatches,
Multiline = (FlagsUnderlyingType)AllFlags::Multiline,
StringCopyMatches = (FlagsUnderlyingType)AllFlags::StringCopyMatches,
};
enum class ECMAScriptFlags : FlagsUnderlyingType {
Global = (FlagsUnderlyingType)AllFlags::Global | (FlagsUnderlyingType)AllFlags::Internal_Stateful, // Note: ECMAScript "Global" creates a stateful regex.
Insensitive = (FlagsUnderlyingType)AllFlags::Insensitive,
Ungreedy = (FlagsUnderlyingType)AllFlags::Ungreedy,
Unicode = (FlagsUnderlyingType)AllFlags::Unicode,
Extended = (FlagsUnderlyingType)AllFlags::Extended,
Extra = (FlagsUnderlyingType)AllFlags::Extra,
SingleLine = (FlagsUnderlyingType)AllFlags::SingleLine,
Sticky = (FlagsUnderlyingType)AllFlags::Sticky,
Multiline = (FlagsUnderlyingType)AllFlags::Multiline,
StringCopyMatches = (FlagsUnderlyingType)AllFlags::StringCopyMatches,
UnicodeSets = (FlagsUnderlyingType)AllFlags::UnicodeSets,
BrowserExtended = (FlagsUnderlyingType)AllFlags::Internal_BrowserExtended,
};
template<class T>
class RegexOptions {
public:
using FlagsType = T;
RegexOptions() = default;
constexpr RegexOptions(T flags)
: m_flags(flags)
{
}
template<class U>
constexpr RegexOptions(RegexOptions<U> other)
: m_flags((T) static_cast<FlagsUnderlyingType>(other.value()))
{
}
operator bool() const { return !!*this; }
bool operator!() const { return (FlagsUnderlyingType)m_flags == 0; }
constexpr RegexOptions<T> operator|(T flag) const { return RegexOptions<T> { (T)((FlagsUnderlyingType)m_flags | (FlagsUnderlyingType)flag) }; }
constexpr RegexOptions<T> operator&(T flag) const { return RegexOptions<T> { (T)((FlagsUnderlyingType)m_flags & (FlagsUnderlyingType)flag) }; }
constexpr RegexOptions<T>& operator|=(T flag)
{
m_flags = (T)((FlagsUnderlyingType)m_flags | (FlagsUnderlyingType)flag);
return *this;
}
constexpr RegexOptions<T>& operator&=(T flag)
{
m_flags = (T)((FlagsUnderlyingType)m_flags & (FlagsUnderlyingType)flag);
return *this;
}
void reset_flags() { m_flags = (T)0; }
void reset_flag(T flag) { m_flags = (T)((FlagsUnderlyingType)m_flags & ~(FlagsUnderlyingType)flag); }
void set_flag(T flag) { *this |= flag; }
bool has_flag_set(T flag) const { return (FlagsUnderlyingType)flag == ((FlagsUnderlyingType)m_flags & (FlagsUnderlyingType)flag); }
T value() const { return m_flags; }
private:
T m_flags { 0 };
};
template<class T>
constexpr RegexOptions<T> operator|(T lhs, T rhs)
{
return RegexOptions<T> { lhs } |= rhs;
}
template<class T>
constexpr RegexOptions<T> operator&(T lhs, T rhs)
{
return RegexOptions<T> { lhs } &= rhs;
}
template<class T>
constexpr T operator~(T flag)
{
return (T) ~((FlagsUnderlyingType)flag);
}
using AllOptions = RegexOptions<AllFlags>;
using ECMAScriptOptions = RegexOptions<ECMAScriptFlags>;
using PosixOptions = RegexOptions<PosixFlags>;
}
using regex::ECMAScriptFlags;
using regex::ECMAScriptOptions;
using regex::PosixFlags;
using regex::PosixOptions;
|
