/* * Copyright (c) 2020, Stephan Unverwerth * * SPDX-License-Identifier: BSD-2-Clause */ #pragma once #include #include #include #include namespace JS { // U+2028 LINE SEPARATOR constexpr char const line_separator_chars[] { (char)0xe2, (char)0x80, (char)0xa8, 0 }; constexpr const StringView LINE_SEPARATOR_STRING { line_separator_chars, sizeof(line_separator_chars) - 1 }; constexpr const u32 LINE_SEPARATOR { 0x2028 }; // U+2029 PARAGRAPH SEPARATOR constexpr char const paragraph_separator_chars[] { (char)0xe2, (char)0x80, (char)0xa9, 0 }; constexpr const StringView PARAGRAPH_SEPARATOR_STRING { paragraph_separator_chars, sizeof(paragraph_separator_chars) - 1 }; constexpr const u32 PARAGRAPH_SEPARATOR { 0x2029 }; // U+00A0 NO BREAK SPACE constexpr const u32 NO_BREAK_SPACE { 0x00A0 }; // U+200C ZERO WIDTH NON-JOINER constexpr const u32 ZERO_WIDTH_NON_JOINER { 0x200C }; // U+FEFF ZERO WIDTH NO-BREAK SPACE constexpr const u32 ZERO_WIDTH_NO_BREAK_SPACE { 0xFEFF }; // U+200D ZERO WIDTH JOINER constexpr const u32 ZERO_WIDTH_JOINER { 0x200D }; #define ENUMERATE_JS_TOKENS \ __ENUMERATE_JS_TOKEN(Ampersand, Operator) \ __ENUMERATE_JS_TOKEN(AmpersandEquals, Operator) \ __ENUMERATE_JS_TOKEN(Arrow, Operator) \ __ENUMERATE_JS_TOKEN(Asterisk, Operator) \ __ENUMERATE_JS_TOKEN(AsteriskEquals, Operator) \ __ENUMERATE_JS_TOKEN(Async, Keyword) \ __ENUMERATE_JS_TOKEN(Await, Keyword) \ __ENUMERATE_JS_TOKEN(BigIntLiteral, Number) \ __ENUMERATE_JS_TOKEN(BoolLiteral, Keyword) \ __ENUMERATE_JS_TOKEN(BracketClose, Punctuation) \ __ENUMERATE_JS_TOKEN(BracketOpen, Punctuation) \ __ENUMERATE_JS_TOKEN(Break, Keyword) \ __ENUMERATE_JS_TOKEN(Caret, Operator) \ __ENUMERATE_JS_TOKEN(CaretEquals, Operator) \ __ENUMERATE_JS_TOKEN(Case, ControlKeyword) \ __ENUMERATE_JS_TOKEN(Catch, ControlKeyword) \ __ENUMERATE_JS_TOKEN(Class, Keyword) \ __ENUMERATE_JS_TOKEN(Colon, Punctuation) \ __ENUMERATE_JS_TOKEN(Comma, Punctuation) \ __ENUMERATE_JS_TOKEN(Const, Keyword) \ __ENUMERATE_JS_TOKEN(Continue, ControlKeyword) \ __ENUMERATE_JS_TOKEN(CurlyClose, Punctuation) \ __ENUMERATE_JS_TOKEN(CurlyOpen, Punctuation) \ __ENUMERATE_JS_TOKEN(Debugger, Keyword) \ __ENUMERATE_JS_TOKEN(Default, ControlKeyword) \ __ENUMERATE_JS_TOKEN(Delete, Keyword) \ __ENUMERATE_JS_TOKEN(Do, ControlKeyword) \ __ENUMERATE_JS_TOKEN(DoubleAmpersand, Operator) \ __ENUMERATE_JS_TOKEN(DoubleAmpersandEquals, Operator) \ __ENUMERATE_JS_TOKEN(DoubleAsterisk, Operator) \ __ENUMERATE_JS_TOKEN(DoubleAsteriskEquals, Operator) \ __ENUMERATE_JS_TOKEN(DoublePipe, Operator) \ __ENUMERATE_JS_TOKEN(DoublePipeEquals, Operator) \ __ENUMERATE_JS_TOKEN(DoubleQuestionMark, Operator) \ __ENUMERATE_JS_TOKEN(DoubleQuestionMarkEquals, Operator) \ __ENUMERATE_JS_TOKEN(Else, ControlKeyword) \ __ENUMERATE_JS_TOKEN(Enum, Keyword) \ __ENUMERATE_JS_TOKEN(Eof, Invalid) \ __ENUMERATE_JS_TOKEN(Equals, Operator) \ __ENUMERATE_JS_TOKEN(EqualsEquals, Operator) \ __ENUMERATE_JS_TOKEN(EqualsEqualsEquals, Operator) \ __ENUMERATE_JS_TOKEN(EscapedKeyword, Identifier) \ __ENUMERATE_JS_TOKEN(ExclamationMark, Operator) \ __ENUMERATE_JS_TOKEN(ExclamationMarkEquals, Operator) \ __ENUMERATE_JS_TOKEN(ExclamationMarkEqualsEquals, Operator) \ __ENUMERATE_JS_TOKEN(Export, Keyword) \ __ENUMERATE_JS_TOKEN(Extends, Keyword) \ __ENUMERATE_JS_TOKEN(Finally, ControlKeyword) \ __ENUMERATE_JS_TOKEN(For, ControlKeyword) \ __ENUMERATE_JS_TOKEN(Function, Keyword) \ __ENUMERATE_JS_TOKEN(GreaterThan, Operator) \ __ENUMERATE_JS_TOKEN(GreaterThanEquals, Operator) \ __ENUMERATE_JS_TOKEN(Identifier, Identifier) \ __ENUMERATE_JS_TOKEN(If, ControlKeyword) \ __ENUMERATE_JS_TOKEN(Implements, Keyword) \ __ENUMERATE_JS_TOKEN(Import, Keyword) \ __ENUMERATE_JS_TOKEN(In, Keyword) \ __ENUMERATE_JS_TOKEN(Instanceof, Keyword) \ __ENUMERATE_JS_TOKEN(Interface, Keyword) \ __ENUMERATE_JS_TOKEN(Invalid, Invalid) \ __ENUMERATE_JS_TOKEN(LessThan, Operator) \ __ENUMERATE_JS_TOKEN(LessThanEquals, Operator) \ __ENUMERATE_JS_TOKEN(Let, Keyword) \ __ENUMERATE_JS_TOKEN(Minus, Operator) \ __ENUMERATE_JS_TOKEN(MinusEquals, Operator) \ __ENUMERATE_JS_TOKEN(MinusMinus, Operator) \ __ENUMERATE_JS_TOKEN(New, Keyword) \ __ENUMERATE_JS_TOKEN(NullLiteral, Keyword) \ __ENUMERATE_JS_TOKEN(NumericLiteral, Number) \ __ENUMERATE_JS_TOKEN(Package, Keyword) \ __ENUMERATE_JS_TOKEN(ParenClose, Punctuation) \ __ENUMERATE_JS_TOKEN(ParenOpen, Punctuation) \ __ENUMERATE_JS_TOKEN(Percent, Operator) \ __ENUMERATE_JS_TOKEN(PercentEquals, Operator) \ __ENUMERATE_JS_TOKEN(Period, Operator) \ __ENUMERATE_JS_TOKEN(Pipe, Operator) \ __ENUMERATE_JS_TOKEN(PipeEquals, Operator) \ __ENUMERATE_JS_TOKEN(Plus, Operator) \ __ENUMERATE_JS_TOKEN(PlusEquals, Operator) \ __ENUMERATE_JS_TOKEN(PlusPlus, Operator) \ __ENUMERATE_JS_TOKEN(Private, Keyword) \ __ENUMERATE_JS_TOKEN(PrivateIdentifier, Identifier) \ __ENUMERATE_JS_TOKEN(Protected, Keyword) \ __ENUMERATE_JS_TOKEN(Public, Keyword) \ __ENUMERATE_JS_TOKEN(QuestionMark, Operator) \ __ENUMERATE_JS_TOKEN(QuestionMarkPeriod, Operator) \ __ENUMERATE_JS_TOKEN(RegexFlags, String) \ __ENUMERATE_JS_TOKEN(RegexLiteral, String) \ __ENUMERATE_JS_TOKEN(Return, ControlKeyword) \ __ENUMERATE_JS_TOKEN(Semicolon, Punctuation) \ __ENUMERATE_JS_TOKEN(ShiftLeft, Operator) \ __ENUMERATE_JS_TOKEN(ShiftLeftEquals, Operator) \ __ENUMERATE_JS_TOKEN(ShiftRight, Operator) \ __ENUMERATE_JS_TOKEN(ShiftRightEquals, Operator) \ __ENUMERATE_JS_TOKEN(Slash, Operator) \ __ENUMERATE_JS_TOKEN(SlashEquals, Operator) \ __ENUMERATE_JS_TOKEN(Static, Keyword) \ __ENUMERATE_JS_TOKEN(StringLiteral, String) \ __ENUMERATE_JS_TOKEN(Super, Keyword) \ __ENUMERATE_JS_TOKEN(Switch, ControlKeyword) \ __ENUMERATE_JS_TOKEN(TemplateLiteralEnd, String) \ __ENUMERATE_JS_TOKEN(TemplateLiteralExprEnd, Punctuation) \ __ENUMERATE_JS_TOKEN(TemplateLiteralExprStart, Punctuation) \ __ENUMERATE_JS_TOKEN(TemplateLiteralStart, String) \ __ENUMERATE_JS_TOKEN(TemplateLiteralString, String) \ __ENUMERATE_JS_TOKEN(This, Keyword) \ __ENUMERATE_JS_TOKEN(Throw, ControlKeyword) \ __ENUMERATE_JS_TOKEN(Tilde, Operator) \ __ENUMERATE_JS_TOKEN(TripleDot, Operator) \ __ENUMERATE_JS_TOKEN(Try, ControlKeyword) \ __ENUMERATE_JS_TOKEN(Typeof, Keyword) \ __ENUMERATE_JS_TOKEN(UnsignedShiftRight, Operator) \ __ENUMERATE_JS_TOKEN(UnsignedShiftRightEquals, Operator) \ __ENUMERATE_JS_TOKEN(UnterminatedRegexLiteral, String) \ __ENUMERATE_JS_TOKEN(UnterminatedStringLiteral, String) \ __ENUMERATE_JS_TOKEN(UnterminatedTemplateLiteral, String) \ __ENUMERATE_JS_TOKEN(Var, Keyword) \ __ENUMERATE_JS_TOKEN(Void, Keyword) \ __ENUMERATE_JS_TOKEN(While, ControlKeyword) \ __ENUMERATE_JS_TOKEN(With, ControlKeyword) \ __ENUMERATE_JS_TOKEN(Yield, ControlKeyword) enum class TokenType { #define __ENUMERATE_JS_TOKEN(type, category) type, ENUMERATE_JS_TOKENS #undef __ENUMERATE_JS_TOKEN _COUNT_OF_TOKENS }; constexpr size_t cs_num_of_js_tokens = static_cast(TokenType::_COUNT_OF_TOKENS); enum class TokenCategory { Invalid, Number, String, Punctuation, Operator, Keyword, ControlKeyword, Identifier }; class Token { public: Token() = default; Token(TokenType type, String message, StringView trivia, StringView value, StringView filename, size_t line_number, size_t line_column, size_t offset) : m_type(type) , m_message(move(message)) , m_trivia(trivia) , m_original_value(value) , m_value(value) , m_filename(filename) , m_line_number(line_number) , m_line_column(line_column) , m_offset(offset) { } TokenType type() const { return m_type; } TokenCategory category() const; static TokenCategory category(TokenType); char const* name() const; static char const* name(TokenType); String const& message() const { return m_message; } StringView trivia() const { return m_trivia; } StringView original_value() const { return m_original_value; } StringView value() const { return m_value.visit( [](StringView view) { return view; }, [](DeprecatedFlyString const& identifier) { return identifier.view(); }, [](Empty) -> StringView { VERIFY_NOT_REACHED(); }); } DeprecatedFlyString DeprecatedFlyString_value() const { return m_value.visit( [](StringView view) -> DeprecatedFlyString { return view; }, [](DeprecatedFlyString const& identifier) -> DeprecatedFlyString { return identifier; }, [](Empty) -> DeprecatedFlyString { VERIFY_NOT_REACHED(); }); } StringView filename() const { return m_filename; } size_t line_number() const { return m_line_number; } size_t line_column() const { return m_line_column; } size_t offset() const { return m_offset; } double double_value() const; bool bool_value() const; enum class StringValueStatus { Ok, MalformedHexEscape, MalformedUnicodeEscape, UnicodeEscapeOverflow, LegacyOctalEscapeSequence, }; ByteString string_value(StringValueStatus& status) const; ByteString raw_template_value() const; void set_identifier_value(DeprecatedFlyString value) { m_value = move(value); } bool is_identifier_name() const; bool trivia_contains_line_terminator() const; private: TokenType m_type { TokenType::Invalid }; String m_message; StringView m_trivia; StringView m_original_value; Variant m_value {}; StringView m_filename; size_t m_line_number { 0 }; size_t m_line_column { 0 }; size_t m_offset { 0 }; }; }