LibRegex: Annotate classes with export macro for hidden visibility

This fix demos the gradual opt-in migration process libraries can
take to switch to explicit symbol exports via the FOO_API macros.

Libraries/LibRegex/CMakeLists.txt

@@ -10,5 +10,5 @@ if(SERENITYOS)
     list(APPEND SOURCES C/Regex.cpp)
 endif()
 
-serenity_lib(LibRegex regex)
+serenity_lib(LibRegex regex EXPLICIT_SYMBOL_EXPORT)
 target_link_libraries(LibRegex PRIVATE LibUnicode)

Libraries/LibRegex/Forward.h

@@ -7,6 +7,7 @@
 #pragma once
 
 #include <AK/Types.h>
+#include <LibRegex/Export.h>
 
 namespace regex {
 struct CompareTypeAndValuePair;

Libraries/LibRegex/RegexByteCode.h

@@ -142,7 +142,7 @@ struct CompareTypeAndValuePair {
 
 class OpCode;
 
-struct StringTable {
+struct REGEX_API StringTable {
     StringTable();
     ~StringTable();
     StringTable(StringTable const&) = default;
@@ -176,7 +176,7 @@ struct StringTable {
     HashMap<ByteCodeValueType, FlyString> m_inverse_table;
 };
 
-class ByteCode : public DisjointChunks<ByteCodeValueType> {
+class REGEX_API ByteCode : public DisjointChunks<ByteCodeValueType> {
     using Base = DisjointChunks<ByteCodeValueType>;
 
 public:

Libraries/LibRegex/RegexLexer.h

@@ -9,6 +9,7 @@
 #include <AK/Forward.h>
 #include <AK/GenericLexer.h>
 #include <AK/StringView.h>
+#include <LibRegex/Forward.h>
 
 namespace regex {
 
@@ -64,7 +65,7 @@ private:
     StringView m_value {};
 };
 
-class Lexer : public GenericLexer {
+class REGEX_API Lexer : public GenericLexer {
 public:
     Lexer();
     explicit Lexer(StringView source);

Libraries/LibRegex/RegexMatcher.h

@@ -32,7 +32,7 @@ struct Block {
 
 static constexpr size_t const c_max_recursion = 5000;
 
-struct RegexResult final {
+struct REGEX_API RegexResult final {
     bool success { false };
     size_t count { 0 };
     Vector<Match> matches;
@@ -44,10 +44,10 @@ struct RegexResult final {
 };
 
 template<class Parser>
-class Regex;
+class REGEX_API Regex;
 
 template<class Parser>
-class Matcher final {
+class REGEX_API Matcher final {
 
 public:
     Matcher(Regex<Parser> const* pattern, Optional<typename ParserTraits<Parser>::OptionsType> regex_options = {})
@@ -78,7 +78,7 @@ private:
 };
 
 template<class Parser>
-class Regex final {
+class REGEX_API Regex final {
 public:
     ByteString pattern_value;
     regex::Parser::Result parser_result;

Libraries/LibRegex/RegexParser.h

@@ -50,7 +50,7 @@ struct NamedCaptureGroup {
     size_t alternative_id;
 };
 
-class Parser {
+class REGEX_API Parser {
 public:
     struct Result {
         ByteCode bytecode;
@@ -137,7 +137,7 @@ protected:
     ParserState m_parser_state;
 };
 
-class AbstractPosixParser : public Parser {
+class REGEX_API AbstractPosixParser : public Parser {
 protected:
     explicit AbstractPosixParser(Lexer& lexer)
         : Parser(lexer)
@@ -152,7 +152,7 @@ protected:
     ALWAYS_INLINE bool parse_bracket_expression(Vector<CompareTypeAndValuePair>&, size_t&);
 };
 
-class PosixBasicParser final : public AbstractPosixParser {
+class REGEX_API PosixBasicParser final : public AbstractPosixParser {
 public:
     explicit PosixBasicParser(Lexer& lexer)
         : AbstractPosixParser(lexer)
@@ -181,7 +181,7 @@ private:
     size_t m_current_capture_group_depth { 0 };
 };
 
-class PosixExtendedParser final : public AbstractPosixParser {
+class REGEX_API PosixExtendedParser final : public AbstractPosixParser {
     constexpr static auto default_options = static_cast<PosixFlags>(AllFlags::SingleLine) | static_cast<PosixFlags>(AllFlags::Internal_ConsiderNewline);
 
 public:
@@ -208,7 +208,7 @@ private:
     ALWAYS_INLINE bool parse_repetition_symbol(ByteCode&, size_t&);
 };
 
-class ECMA262Parser final : public Parser {
+class REGEX_API ECMA262Parser final : public Parser {
     constexpr static ECMAScriptOptions default_options = static_cast<ECMAScriptFlags>(AllFlags::Internal_ConsiderNewline);
 
 public: