Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibRegex/RegexError.h

@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2020, Emanuel Sprung <emanuel.sprung@gmail.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include "RegexDefs.h"
+#include <AK/StringView.h>
+#include <AK/Types.h>
+
+namespace regex {
+
+enum class Error : u8 {
+    NoError = __Regex_NoError,
+    InvalidPattern = __Regex_InvalidPattern,                           // Invalid regular expression.
+    InvalidCollationElement = __Regex_InvalidCollationElement,         // Invalid collating element referenced.
+    InvalidCharacterClass = __Regex_InvalidCharacterClass,             // Invalid character class type referenced.
+    InvalidTrailingEscape = __Regex_InvalidTrailingEscape,             // Trailing \ in pattern.
+    InvalidNumber = __Regex_InvalidNumber,                             // Number in \digit invalid or in error.
+    MismatchingBracket = __Regex_MismatchingBracket,                   // [ ] imbalance.
+    MismatchingParen = __Regex_MismatchingParen,                       // ( ) imbalance.
+    MismatchingBrace = __Regex_MismatchingBrace,                       // { } imbalance.
+    InvalidBraceContent = __Regex_InvalidBraceContent,                 // Content of {} invalid: not a number, number too large, more than two numbers, first larger than second.
+    InvalidBracketContent = __Regex_InvalidBracketContent,             // Content of [] invalid.
+    InvalidRange = __Regex_InvalidRange,                               // Invalid endpoint in range expression.
+    InvalidRepetitionMarker = __Regex_InvalidRepetitionMarker,         // ?, * or + not preceded by valid regular expression.
+    ReachedMaxRecursion = __Regex_ReachedMaxRecursion,                 // MaximumRecursion has been reached.
+    EmptySubExpression = __Regex_EmptySubExpression,                   // Sub expression has empty content.
+    InvalidCaptureGroup = __Regex_InvalidCaptureGroup,                 // Content of capture group is invalid.
+    InvalidNameForCaptureGroup = __Regex_InvalidNameForCaptureGroup,   // Name of capture group is invalid.
+    InvalidNameForProperty = __Regex_InvalidNameForProperty,           // Name of property is invalid.
+    DuplicateNamedCapture = __Regex_DuplicateNamedCapture,             // Name of property is invalid.
+    InvalidCharacterClassEscape = __Regex_InvalidCharacterClassEscape, // Invalid escaped entity in character class.
+};
+
+inline StringView get_error_string(Error error)
+{
+    switch (error) {
+    case Error::NoError:
+        return "No error"sv;
+    case Error::InvalidPattern:
+        return "Invalid regular expression."sv;
+    case Error::InvalidCollationElement:
+        return "Invalid collating element referenced."sv;
+    case Error::InvalidCharacterClass:
+        return "Invalid character class type referenced."sv;
+    case Error::InvalidTrailingEscape:
+        return "Trailing \\ in pattern."sv;
+    case Error::InvalidNumber:
+        return "Number in \\digit invalid or in error."sv;
+    case Error::MismatchingBracket:
+        return "[ ] imbalance."sv;
+    case Error::MismatchingParen:
+        return "( ) imbalance."sv;
+    case Error::MismatchingBrace:
+        return "{ } imbalance."sv;
+    case Error::InvalidBraceContent:
+        return "Content of {} invalid: not a number, number too large, more than two numbers, first larger than second."sv;
+    case Error::InvalidBracketContent:
+        return "Content of [] invalid."sv;
+    case Error::InvalidRange:
+        return "Invalid endpoint in range expression."sv;
+    case Error::InvalidRepetitionMarker:
+        return "?, * or + not preceded by valid regular expression."sv;
+    case Error::ReachedMaxRecursion:
+        return "Maximum recursion has been reached."sv;
+    case Error::EmptySubExpression:
+        return "Sub expression has empty content."sv;
+    case Error::InvalidCaptureGroup:
+        return "Content of capture group is invalid."sv;
+    case Error::InvalidNameForCaptureGroup:
+        return "Name of capture group is invalid."sv;
+    case Error::InvalidNameForProperty:
+        return "Name of property is invalid."sv;
+    case Error::DuplicateNamedCapture:
+        return "Duplicate capture group name"sv;
+    case Error::InvalidCharacterClassEscape:
+        return "Invalid escaped entity in character class."sv;
+    }
+    return "Undefined error."sv;
+}
+}
+
+using regex::get_error_string;