80fecc615a
Implement the syntax and behavor necessary to support array literals such as [...[1, 2, 3]]. A type error is thrown if the target of the spread operator does not evaluate to an array (though it should eventually just check for an iterable). Note that the spread token's name is TripleDot, since the '...' token is used for two features: spread and rest. Calling it anything involving 'spread' or 'rest' would be a bit confusing.
176 lines
7.8 KiB
C++
176 lines
7.8 KiB
C++
/*
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* Copyright (c) 2020, Stephan Unverwerth <s.unverwerth@gmx.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/String.h>
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#include <AK/StringView.h>
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namespace JS {
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#define ENUMERATE_JS_TOKENS \
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__ENUMERATE_JS_TOKEN(Ampersand) \
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__ENUMERATE_JS_TOKEN(AmpersandEquals) \
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__ENUMERATE_JS_TOKEN(Arrow) \
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__ENUMERATE_JS_TOKEN(Asterisk) \
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__ENUMERATE_JS_TOKEN(AsteriskAsteriskEquals) \
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__ENUMERATE_JS_TOKEN(AsteriskEquals) \
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__ENUMERATE_JS_TOKEN(Await) \
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__ENUMERATE_JS_TOKEN(BoolLiteral) \
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__ENUMERATE_JS_TOKEN(BracketClose) \
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__ENUMERATE_JS_TOKEN(BracketOpen) \
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__ENUMERATE_JS_TOKEN(Break) \
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__ENUMERATE_JS_TOKEN(Caret) \
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__ENUMERATE_JS_TOKEN(Case) \
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__ENUMERATE_JS_TOKEN(Catch) \
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__ENUMERATE_JS_TOKEN(Class) \
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__ENUMERATE_JS_TOKEN(Colon) \
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__ENUMERATE_JS_TOKEN(Comma) \
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__ENUMERATE_JS_TOKEN(Const) \
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__ENUMERATE_JS_TOKEN(Continue) \
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__ENUMERATE_JS_TOKEN(CurlyClose) \
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__ENUMERATE_JS_TOKEN(CurlyOpen) \
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__ENUMERATE_JS_TOKEN(Default) \
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__ENUMERATE_JS_TOKEN(Delete) \
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__ENUMERATE_JS_TOKEN(Do) \
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__ENUMERATE_JS_TOKEN(DoubleAmpersand) \
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__ENUMERATE_JS_TOKEN(DoubleAsterisk) \
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__ENUMERATE_JS_TOKEN(DoublePipe) \
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__ENUMERATE_JS_TOKEN(DoubleQuestionMark) \
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__ENUMERATE_JS_TOKEN(Else) \
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__ENUMERATE_JS_TOKEN(Eof) \
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__ENUMERATE_JS_TOKEN(Equals) \
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__ENUMERATE_JS_TOKEN(EqualsEquals) \
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__ENUMERATE_JS_TOKEN(EqualsEqualsEquals) \
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__ENUMERATE_JS_TOKEN(ExclamationMark) \
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__ENUMERATE_JS_TOKEN(ExclamationMarkEquals) \
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__ENUMERATE_JS_TOKEN(ExclamationMarkEqualsEquals) \
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__ENUMERATE_JS_TOKEN(Finally) \
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__ENUMERATE_JS_TOKEN(For) \
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__ENUMERATE_JS_TOKEN(Function) \
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__ENUMERATE_JS_TOKEN(GreaterThan) \
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__ENUMERATE_JS_TOKEN(GreaterThanEquals) \
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__ENUMERATE_JS_TOKEN(Identifier) \
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__ENUMERATE_JS_TOKEN(If) \
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__ENUMERATE_JS_TOKEN(In) \
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__ENUMERATE_JS_TOKEN(Instanceof) \
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__ENUMERATE_JS_TOKEN(Interface) \
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__ENUMERATE_JS_TOKEN(Invalid) \
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__ENUMERATE_JS_TOKEN(LessThan) \
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__ENUMERATE_JS_TOKEN(LessThanEquals) \
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__ENUMERATE_JS_TOKEN(Let) \
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__ENUMERATE_JS_TOKEN(Minus) \
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__ENUMERATE_JS_TOKEN(MinusEquals) \
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__ENUMERATE_JS_TOKEN(MinusMinus) \
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__ENUMERATE_JS_TOKEN(New) \
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__ENUMERATE_JS_TOKEN(NullLiteral) \
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__ENUMERATE_JS_TOKEN(NumericLiteral) \
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__ENUMERATE_JS_TOKEN(ParenClose) \
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__ENUMERATE_JS_TOKEN(ParenOpen) \
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__ENUMERATE_JS_TOKEN(Percent) \
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__ENUMERATE_JS_TOKEN(PercentEquals) \
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__ENUMERATE_JS_TOKEN(Period) \
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__ENUMERATE_JS_TOKEN(Pipe) \
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__ENUMERATE_JS_TOKEN(PipeEquals) \
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__ENUMERATE_JS_TOKEN(Plus) \
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__ENUMERATE_JS_TOKEN(PlusEquals) \
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__ENUMERATE_JS_TOKEN(PlusPlus) \
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__ENUMERATE_JS_TOKEN(QuestionMark) \
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__ENUMERATE_JS_TOKEN(QuestionMarkPeriod) \
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__ENUMERATE_JS_TOKEN(RegexLiteral) \
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__ENUMERATE_JS_TOKEN(Return) \
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__ENUMERATE_JS_TOKEN(Semicolon) \
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__ENUMERATE_JS_TOKEN(ShiftLeft) \
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__ENUMERATE_JS_TOKEN(ShiftLeftEquals) \
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__ENUMERATE_JS_TOKEN(ShiftRight) \
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__ENUMERATE_JS_TOKEN(ShiftRightEquals) \
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__ENUMERATE_JS_TOKEN(Slash) \
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__ENUMERATE_JS_TOKEN(SlashEquals) \
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__ENUMERATE_JS_TOKEN(StringLiteral) \
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__ENUMERATE_JS_TOKEN(Switch) \
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__ENUMERATE_JS_TOKEN(TemplateLiteral) \
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__ENUMERATE_JS_TOKEN(This) \
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__ENUMERATE_JS_TOKEN(Throw) \
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__ENUMERATE_JS_TOKEN(Tilde) \
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__ENUMERATE_JS_TOKEN(TripleDot) \
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__ENUMERATE_JS_TOKEN(Try) \
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__ENUMERATE_JS_TOKEN(Typeof) \
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__ENUMERATE_JS_TOKEN(UnsignedShiftRight) \
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__ENUMERATE_JS_TOKEN(UnsignedShiftRightEquals) \
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__ENUMERATE_JS_TOKEN(UnterminatedStringLiteral) \
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__ENUMERATE_JS_TOKEN(Var) \
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__ENUMERATE_JS_TOKEN(Void) \
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__ENUMERATE_JS_TOKEN(While) \
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__ENUMERATE_JS_TOKEN(Yield)
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enum class TokenType {
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#define __ENUMERATE_JS_TOKEN(x) x,
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ENUMERATE_JS_TOKENS
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#undef __ENUMERATE_JS_TOKEN
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};
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class Token {
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public:
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Token(TokenType type, StringView trivia, StringView value, size_t line_number, size_t line_column)
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: m_type(type)
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, m_trivia(trivia)
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, m_value(value)
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, m_line_number(line_number)
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, m_line_column(line_column)
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{
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}
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TokenType type() const { return m_type; }
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const char* name() const;
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static const char* name(TokenType);
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const StringView& trivia() const { return m_trivia; }
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const StringView& value() const { return m_value; }
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size_t line_number() const { return m_line_number; }
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size_t line_column() const { return m_line_column; }
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double double_value() const;
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String string_value() const;
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bool bool_value() const;
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bool is_identifier_name() const;
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private:
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TokenType m_type;
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StringView m_trivia;
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StringView m_value;
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size_t m_line_number;
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size_t m_line_column;
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};
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}
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namespace AK {
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template<>
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struct Traits<JS::TokenType> : public GenericTraits<JS::TokenType> {
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static constexpr bool is_trivial() { return true; }
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static unsigned hash(JS::TokenType t) { return int_hash((int)t); }
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};
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}
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