mirror of
https://github.com/RGBCube/serenity
synced 2025-05-31 02:58:12 +00:00
LibJS: Add operator precedence parsing
Obey precedence and associativity rules when parsing expressions with chained operators.
This commit is contained in:
Stephan Unverwerth
Andreas Kling
parent
f347dd5c5e
commit
15d5b2d29e
8 changed files with 281 additions and 53 deletions
2
Base/home/anon/js/operator-precedence.js
Normal file
2
Base/home/anon/js/operator-precedence.js
Normal file
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@ -0,0 +1,2 @@
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var foo = 1 + 2 * 3 - 4 / 5;
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foo.bar();
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@ -54,7 +54,7 @@ Value ExpressionStatement::execute(Interpreter& interpreter) const
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Value CallExpression::execute(Interpreter& interpreter) const
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{
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auto callee = interpreter.get_variable(name());
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auto callee = m_callee->execute(interpreter);
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ASSERT(callee.is_object());
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ASSERT(callee.as_object()->is_function());
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auto* function = static_cast<Function*>(callee.as_object());
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@ -304,9 +304,8 @@ void UnaryExpression::dump(int indent) const
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void CallExpression::dump(int indent) const
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{
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print_indent(indent);
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printf("%s '%s'\n", class_name(), name().characters());
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ASTNode::dump(indent);
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m_callee->dump(indent + 1);
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for (auto& argument : m_arguments)
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argument.dump(indent + 1);
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}
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@ -398,8 +398,8 @@ private:
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class CallExpression : public Expression {
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public:
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explicit CallExpression(String name, NonnullOwnPtrVector<Expression> arguments = {})
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: m_name(move(name))
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explicit CallExpression(NonnullOwnPtr<Expression> callee, NonnullOwnPtrVector<Expression> arguments = {})
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: m_callee(move(callee))
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, m_arguments(move(arguments))
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{
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}
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@ -407,12 +407,10 @@ public:
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virtual Value execute(Interpreter&) const override;
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virtual void dump(int indent) const override;
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const String& name() const { return m_name; }
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private:
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virtual const char* class_name() const override { return "CallExpression"; }
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String m_name;
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NonnullOwnPtr<Expression> m_callee;
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const NonnullOwnPtrVector<Expression> m_arguments;
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};
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@ -42,31 +42,41 @@ Lexer::Lexer(StringView source)
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, m_current_token(TokenType::Eof, StringView(nullptr), StringView(nullptr))
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{
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if (s_keywords.is_empty()) {
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s_keywords.set("true", TokenType::BoolLiteral);
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s_keywords.set("false", TokenType::BoolLiteral);
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s_keywords.set("await", TokenType::Await);
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s_keywords.set("catch", TokenType::Catch);
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s_keywords.set("class", TokenType::Class);
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s_keywords.set("const", TokenType::Const);
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s_keywords.set("delete", TokenType::Delete);
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s_keywords.set("do", TokenType::Do);
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s_keywords.set("else", TokenType::Else);
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s_keywords.set("false", TokenType::BoolLiteral);
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s_keywords.set("finally", TokenType::Finally);
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s_keywords.set("for", TokenType::For);
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s_keywords.set("function", TokenType::Function);
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s_keywords.set("if", TokenType::If);
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s_keywords.set("in", TokenType::In);
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s_keywords.set("instanceof", TokenType::Instanceof);
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s_keywords.set("interface", TokenType::Interface);
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s_keywords.set("let", TokenType::Let);
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s_keywords.set("new", TokenType::New);
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s_keywords.set("null", TokenType::NullLiteral);
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s_keywords.set("return", TokenType::Return);
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s_keywords.set("true", TokenType::BoolLiteral);
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s_keywords.set("try", TokenType::Try);
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s_keywords.set("typeof", TokenType::Typeof);
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s_keywords.set("var", TokenType::Var);
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s_keywords.set("void", TokenType::Void);
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s_keywords.set("while", TokenType::While);
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s_keywords.set("yield", TokenType::Yield);
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}
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if (s_three_char_tokens.is_empty()) {
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s_three_char_tokens.set("===", TokenType::EqualsEqualsEquals);
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s_three_char_tokens.set("!==", TokenType::ExclamationMarkEqualsEquals);
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s_three_char_tokens.set("**=", TokenType::AsteriskAsteriskEquals);
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s_three_char_tokens.set("<<=", TokenType::ShiftLeftEquals);
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s_three_char_tokens.set(">>=", TokenType::ShiftRightEquals);
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s_three_char_tokens.set(">>>", TokenType::UnsignedShiftRight);
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}
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if (s_two_char_tokens.is_empty()) {
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@ -79,12 +89,15 @@ Lexer::Lexer(StringView source)
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s_two_char_tokens.set("|=", TokenType::PipeEquals);
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s_two_char_tokens.set("&&", TokenType::DoubleAmpersand);
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s_two_char_tokens.set("||", TokenType::DoublePipe);
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s_two_char_tokens.set("??", TokenType::DoubleQuestionMark);
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s_two_char_tokens.set("**", TokenType::DoubleAsterisk);
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s_two_char_tokens.set("==", TokenType::EqualsEquals);
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s_two_char_tokens.set("!=", TokenType::ExclamationMarkEquals);
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s_two_char_tokens.set("--", TokenType::MinusMinus);
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s_two_char_tokens.set("++", TokenType::PlusPlus);
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s_two_char_tokens.set("<<", TokenType::ShiftLeft);
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s_two_char_tokens.set(">>", TokenType::ShiftRight);
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s_two_char_tokens.set("?.", TokenType::QuestionMarkPeriod);
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}
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if (s_single_char_tokens.is_empty()) {
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@ -92,6 +105,7 @@ Lexer::Lexer(StringView source)
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s_single_char_tokens.set('*', TokenType::Asterisk);
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s_single_char_tokens.set('[', TokenType::BracketOpen);
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s_single_char_tokens.set(']', TokenType::BracketClose);
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s_single_char_tokens.set('^', TokenType::Caret);
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s_single_char_tokens.set(',', TokenType::Comma);
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s_single_char_tokens.set('{', TokenType::CurlyOpen);
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s_single_char_tokens.set('}', TokenType::CurlyClose);
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@ -107,6 +121,7 @@ Lexer::Lexer(StringView source)
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s_single_char_tokens.set('?', TokenType::QuestionMark);
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s_single_char_tokens.set(';', TokenType::Semicolon);
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s_single_char_tokens.set('/', TokenType::Slash);
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s_single_char_tokens.set('~', TokenType::Tilde);
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s_single_char_tokens.set('<', TokenType::LessThan);
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s_single_char_tokens.set('>', TokenType::GreaterThan);
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}
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@ -213,8 +228,25 @@ Token Lexer::next()
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} else if (m_current_char == EOF) {
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token_type = TokenType::Eof;
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} else {
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// There is only one four-char operator: >>>=
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bool found_four_char_token = false;
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if (m_position + 2 < m_source.length()) {
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if (m_current_char == '>'
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&& m_source[m_position] == '>'
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&& m_source[m_position + 1] == '>'
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&& m_source[m_position + 2] == '=') {
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found_four_char_token = true;
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consume();
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consume();
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consume();
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consume();
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token_type = TokenType::UnsignedShiftRightEquals;
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}
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}
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bool found_three_char_token = false;
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if (m_position + 1 < m_source.length()) {
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if (!found_four_char_token && m_position + 1 < m_source.length()) {
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char second_char = m_source[m_position];
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char third_char = m_source[m_position + 1];
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char three_chars[] { (char)m_current_char, second_char, third_char, 0 };
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@ -229,7 +261,7 @@ Token Lexer::next()
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}
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bool found_two_char_token = false;
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if (!found_three_char_token && m_position < m_source.length()) {
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if (!found_four_char_token && !found_three_char_token && m_position < m_source.length()) {
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char second_char = m_source[m_position];
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char two_chars[] { (char)m_current_char, second_char, 0 };
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auto it = s_two_char_tokens.find(two_chars);
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@ -242,7 +274,7 @@ Token Lexer::next()
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}
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bool found_one_char_token = false;
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if (!found_three_char_token && !found_two_char_token) {
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if (!found_four_char_token && !found_three_char_token && !found_two_char_token) {
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auto it = s_single_char_tokens.find(m_current_char);
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if (it != s_single_char_tokens.end()) {
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found_one_char_token = true;
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@ -251,7 +283,7 @@ Token Lexer::next()
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}
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}
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if (!found_three_char_token && !found_two_char_token && !found_one_char_token) {
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if (!found_four_char_token && !found_three_char_token && !found_two_char_token && !found_one_char_token) {
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consume();
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token_type = TokenType::Invalid;
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}
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@ -25,14 +25,142 @@
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*/
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#include "Parser.h"
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#include <AK/HashMap.h>
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#include <AK/StdLibExtras.h>
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#include <stdio.h>
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namespace JS {
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static HashMap<TokenType, int> g_operator_precedence;
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Parser::Parser(Lexer lexer)
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: m_lexer(move(lexer))
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, m_current_token(m_lexer.next())
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{
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if (g_operator_precedence.is_empty()) {
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// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence
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g_operator_precedence.set(TokenType::Period, 20);
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g_operator_precedence.set(TokenType::BracketOpen, 20);
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g_operator_precedence.set(TokenType::ParenOpen, 20);
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g_operator_precedence.set(TokenType::QuestionMarkPeriod, 20);
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g_operator_precedence.set(TokenType::New, 19);
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g_operator_precedence.set(TokenType::PlusPlus, 18);
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g_operator_precedence.set(TokenType::MinusMinus, 18);
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g_operator_precedence.set(TokenType::ExclamationMark, 17);
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g_operator_precedence.set(TokenType::Tilde, 17);
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g_operator_precedence.set(TokenType::Typeof, 17);
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g_operator_precedence.set(TokenType::Void, 17);
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g_operator_precedence.set(TokenType::Delete, 17);
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g_operator_precedence.set(TokenType::Await, 17);
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g_operator_precedence.set(TokenType::DoubleAsterisk, 16);
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g_operator_precedence.set(TokenType::Asterisk, 15);
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g_operator_precedence.set(TokenType::Slash, 15);
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g_operator_precedence.set(TokenType::Percent, 15);
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g_operator_precedence.set(TokenType::Plus, 14);
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g_operator_precedence.set(TokenType::Minus, 14);
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g_operator_precedence.set(TokenType::ShiftLeft, 13);
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g_operator_precedence.set(TokenType::ShiftRight, 13);
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g_operator_precedence.set(TokenType::UnsignedShiftRight, 13);
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g_operator_precedence.set(TokenType::LessThan, 12);
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g_operator_precedence.set(TokenType::LessThanEquals, 12);
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g_operator_precedence.set(TokenType::GreaterThan, 12);
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g_operator_precedence.set(TokenType::GreaterThanEquals, 12);
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g_operator_precedence.set(TokenType::In, 12);
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g_operator_precedence.set(TokenType::Instanceof, 12);
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g_operator_precedence.set(TokenType::EqualsEquals, 11);
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g_operator_precedence.set(TokenType::ExclamationMarkEquals, 11);
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g_operator_precedence.set(TokenType::EqualsEqualsEquals, 11);
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g_operator_precedence.set(TokenType::ExclamationMarkEqualsEquals, 11);
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g_operator_precedence.set(TokenType::Ampersand, 10);
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g_operator_precedence.set(TokenType::Caret, 9);
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g_operator_precedence.set(TokenType::Pipe, 8);
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g_operator_precedence.set(TokenType::DoubleQuestionMark, 7);
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g_operator_precedence.set(TokenType::DoubleAmpersand, 6);
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g_operator_precedence.set(TokenType::DoublePipe, 5);
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g_operator_precedence.set(TokenType::QuestionMark, 4);
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g_operator_precedence.set(TokenType::Equals, 3);
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g_operator_precedence.set(TokenType::PlusEquals, 3);
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g_operator_precedence.set(TokenType::MinusEquals, 3);
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g_operator_precedence.set(TokenType::AsteriskAsteriskEquals, 3);
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g_operator_precedence.set(TokenType::AsteriskEquals, 3);
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g_operator_precedence.set(TokenType::SlashEquals, 3);
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g_operator_precedence.set(TokenType::PercentEquals, 3);
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g_operator_precedence.set(TokenType::ShiftLeftEquals, 3);
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g_operator_precedence.set(TokenType::ShiftRightEquals, 3);
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g_operator_precedence.set(TokenType::UnsignedShiftRightEquals, 3);
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g_operator_precedence.set(TokenType::PipeEquals, 3);
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g_operator_precedence.set(TokenType::Yield, 2);
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g_operator_precedence.set(TokenType::Comma, 1);
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}
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}
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int Parser::operator_precedence(TokenType type) const
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{
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auto it = g_operator_precedence.find(type);
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if (it == g_operator_precedence.end()) {
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fprintf(stderr, "No precedence for operator %s\n", Token::name(type));
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ASSERT_NOT_REACHED();
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return -1;
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}
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return it->value;
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}
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Associativity Parser::operator_associativity(TokenType type) const
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{
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switch (type) {
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case TokenType::Period:
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case TokenType::BracketOpen:
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case TokenType::ParenOpen:
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case TokenType::QuestionMarkPeriod:
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case TokenType::Asterisk:
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case TokenType::Slash:
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case TokenType::Percent:
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case TokenType::Plus:
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case TokenType::Minus:
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case TokenType::ShiftLeft:
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case TokenType::ShiftRight:
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case TokenType::UnsignedShiftRight:
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case TokenType::LessThan:
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case TokenType::LessThanEquals:
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case TokenType::GreaterThan:
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case TokenType::GreaterThanEquals:
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case TokenType::In:
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case TokenType::Instanceof:
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case TokenType::EqualsEquals:
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case TokenType::ExclamationMarkEquals:
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case TokenType::EqualsEqualsEquals:
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case TokenType::ExclamationMarkEqualsEquals:
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case TokenType::Ampersand:
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case TokenType::Caret:
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case TokenType::Pipe:
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case TokenType::DoubleQuestionMark:
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case TokenType::DoubleAmpersand:
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case TokenType::DoublePipe:
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case TokenType::Comma:
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return Associativity::Left;
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default:
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return Associativity::Right;
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}
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}
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NonnullOwnPtr<Program> Parser::parse_program()
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@ -54,7 +182,7 @@ NonnullOwnPtr<Program> Parser::parse_program()
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NonnullOwnPtr<Statement> Parser::parse_statement()
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{
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if (match_expression()) {
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return make<JS::ExpressionStatement>(parse_expression());
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return make<JS::ExpressionStatement>(parse_expression(0));
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}
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switch (m_current_token.type()) {
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@ -83,7 +211,7 @@ NonnullOwnPtr<Expression> Parser::parse_primary_expression()
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switch (m_current_token.type()) {
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case TokenType::ParenOpen: {
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consume(TokenType::ParenOpen);
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auto expression = parse_expression();
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auto expression = parse_expression(0);
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consume(TokenType::ParenClose);
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return expression;
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}
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@ -113,68 +241,75 @@ NonnullOwnPtr<ObjectExpression> Parser::parse_object_expression()
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return make<ObjectExpression>();
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}
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NonnullOwnPtr<Expression> Parser::parse_expression()
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NonnullOwnPtr<Expression> Parser::parse_expression(int min_precedence, Associativity associativity)
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{
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auto expression = parse_primary_expression();
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while (match_secondary_expression()) {
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expression = parse_secondary_expression(move(expression));
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int new_precedence = operator_precedence(m_current_token.type());
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if (new_precedence < min_precedence)
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break;
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if (new_precedence == min_precedence && associativity == Associativity::Left)
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break;
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Associativity new_associativity = operator_associativity(m_current_token.type());
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expression = parse_secondary_expression(move(expression), new_precedence, new_associativity);
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}
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return expression;
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}
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NonnullOwnPtr<Expression> Parser::parse_secondary_expression(NonnullOwnPtr<Expression> lhs)
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NonnullOwnPtr<Expression> Parser::parse_secondary_expression(NonnullOwnPtr<Expression> lhs, int min_precedence, Associativity associativity)
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{
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switch (m_current_token.type()) {
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case TokenType::Plus:
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consume();
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return make<BinaryExpression>(BinaryOp::Plus, move(lhs), parse_expression());
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return make<BinaryExpression>(BinaryOp::Plus, move(lhs), parse_expression(min_precedence, associativity));
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case TokenType::PlusEquals:
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consume();
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return make<AssignmentExpression>(AssignmentOp::AdditionAssignment, move(lhs), parse_expression());
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return make<AssignmentExpression>(AssignmentOp::AdditionAssignment, move(lhs), parse_expression(min_precedence, associativity));
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case TokenType::Minus:
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consume();
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return make<BinaryExpression>(BinaryOp::Minus, move(lhs), parse_expression());
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return make<BinaryExpression>(BinaryOp::Minus, move(lhs), parse_expression(min_precedence, associativity));
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case TokenType::MinusEquals:
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consume();
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return make<AssignmentExpression>(AssignmentOp::SubtractionAssignment, move(lhs), parse_expression());
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return make<AssignmentExpression>(AssignmentOp::SubtractionAssignment, move(lhs), parse_expression(min_precedence, associativity));
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case TokenType::Asterisk:
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consume();
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return make<BinaryExpression>(BinaryOp::Asterisk, move(lhs), parse_expression());
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return make<BinaryExpression>(BinaryOp::Asterisk, move(lhs), parse_expression(min_precedence, associativity));
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case TokenType::AsteriskEquals:
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consume();
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return make<AssignmentExpression>(AssignmentOp::MultiplicationAssignment, move(lhs), parse_expression());
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return make<AssignmentExpression>(AssignmentOp::MultiplicationAssignment, move(lhs), parse_expression(min_precedence, associativity));
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case TokenType::Slash:
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||||
consume();
|
||||
return make<BinaryExpression>(BinaryOp::Slash, move(lhs), parse_expression());
|
||||
return make<BinaryExpression>(BinaryOp::Slash, move(lhs), parse_expression(min_precedence, associativity));
|
||||
case TokenType::SlashEquals:
|
||||
consume();
|
||||
return make<AssignmentExpression>(AssignmentOp::DivisionAssignment, move(lhs), parse_expression());
|
||||
return make<AssignmentExpression>(AssignmentOp::DivisionAssignment, move(lhs), parse_expression(min_precedence, associativity));
|
||||
case TokenType::GreaterThan:
|
||||
consume();
|
||||
return make<BinaryExpression>(BinaryOp::GreaterThan, move(lhs), parse_expression());
|
||||
return make<BinaryExpression>(BinaryOp::GreaterThan, move(lhs), parse_expression(min_precedence, associativity));
|
||||
case TokenType::GreaterThanEquals:
|
||||
consume();
|
||||
return make<BinaryExpression>(BinaryOp::GreaterThanEquals, move(lhs), parse_expression());
|
||||
return make<BinaryExpression>(BinaryOp::GreaterThanEquals, move(lhs), parse_expression(min_precedence, associativity));
|
||||
case TokenType::LessThan:
|
||||
consume();
|
||||
return make<BinaryExpression>(BinaryOp::LessThan, move(lhs), parse_expression());
|
||||
return make<BinaryExpression>(BinaryOp::LessThan, move(lhs), parse_expression(min_precedence, associativity));
|
||||
case TokenType::LessThanEquals:
|
||||
consume();
|
||||
return make<BinaryExpression>(BinaryOp::LessThanEquals, move(lhs), parse_expression());
|
||||
return make<BinaryExpression>(BinaryOp::LessThanEquals, move(lhs), parse_expression(min_precedence, associativity));
|
||||
case TokenType::EqualsEqualsEquals:
|
||||
consume();
|
||||
return make<BinaryExpression>(BinaryOp::TypedEquals, move(lhs), parse_expression());
|
||||
return make<BinaryExpression>(BinaryOp::TypedEquals, move(lhs), parse_expression(min_precedence, associativity));
|
||||
case TokenType::ExclamationMarkEqualsEquals:
|
||||
consume();
|
||||
return make<BinaryExpression>(BinaryOp::TypedInequals, move(lhs), parse_expression());
|
||||
return make<BinaryExpression>(BinaryOp::TypedInequals, move(lhs), parse_expression(min_precedence, associativity));
|
||||
case TokenType::ParenOpen:
|
||||
return parse_call_expression(move(lhs));
|
||||
case TokenType::Equals:
|
||||
consume();
|
||||
return make<AssignmentExpression>(AssignmentOp::Assignment, move(lhs), parse_expression());
|
||||
return make<AssignmentExpression>(AssignmentOp::Assignment, move(lhs), parse_expression(min_precedence, associativity));
|
||||
case TokenType::Period:
|
||||
consume();
|
||||
return make<MemberExpression>(move(lhs), parse_expression());
|
||||
return make<MemberExpression>(move(lhs), parse_expression(min_precedence, associativity));
|
||||
case TokenType::PlusPlus:
|
||||
consume();
|
||||
return make<UpdateExpression>(UpdateOp::Increment, move(lhs));
|
||||
|
|
@ -196,7 +331,7 @@ NonnullOwnPtr<CallExpression> Parser::parse_call_expression(NonnullOwnPtr<Expres
|
|||
NonnullOwnPtrVector<Expression> arguments;
|
||||
|
||||
while (match_expression()) {
|
||||
arguments.append(parse_expression());
|
||||
arguments.append(parse_expression(0));
|
||||
if (!match(TokenType::Comma))
|
||||
break;
|
||||
consume();
|
||||
|
|
@ -204,20 +339,14 @@ NonnullOwnPtr<CallExpression> Parser::parse_call_expression(NonnullOwnPtr<Expres
|
|||
|
||||
consume(TokenType::ParenClose);
|
||||
|
||||
// FIXME: Allow lhs expression instead of just a string
|
||||
if (lhs->is_identifier()) {
|
||||
return make<CallExpression>(static_cast<Identifier*>(lhs.ptr())->string(), move(arguments));
|
||||
}
|
||||
|
||||
m_has_errors = true;
|
||||
return make<CallExpression>("***ERROR***");
|
||||
return make<CallExpression>(move(lhs), move(arguments));
|
||||
}
|
||||
|
||||
NonnullOwnPtr<ReturnStatement> Parser::parse_return_statement()
|
||||
{
|
||||
consume(TokenType::Return);
|
||||
if (match_expression()) {
|
||||
return make<ReturnStatement>(parse_expression());
|
||||
return make<ReturnStatement>(parse_expression(0));
|
||||
}
|
||||
return make<ReturnStatement>(nullptr);
|
||||
}
|
||||
|
|
@ -283,7 +412,7 @@ NonnullOwnPtr<VariableDeclaration> Parser::parse_variable_declaration()
|
|||
OwnPtr<Expression> initializer;
|
||||
if (match(TokenType::Equals)) {
|
||||
consume();
|
||||
initializer = parse_expression();
|
||||
initializer = parse_expression(0);
|
||||
}
|
||||
return make<VariableDeclaration>(make<Identifier>(name), move(initializer), declaration_type);
|
||||
}
|
||||
|
|
@ -313,7 +442,7 @@ NonnullOwnPtr<ForStatement> Parser::parse_for_statement()
|
|||
case TokenType::Semicolon:
|
||||
break;
|
||||
default:
|
||||
test = parse_expression();
|
||||
test = parse_expression(0);
|
||||
break;
|
||||
}
|
||||
|
||||
|
|
@ -324,7 +453,7 @@ NonnullOwnPtr<ForStatement> Parser::parse_for_statement()
|
|||
case TokenType::Semicolon:
|
||||
break;
|
||||
default:
|
||||
update = parse_expression();
|
||||
update = parse_expression(0);
|
||||
break;
|
||||
}
|
||||
|
||||
|
|
@ -405,9 +534,9 @@ bool Parser::done() const
|
|||
|
||||
Token Parser::consume()
|
||||
{
|
||||
auto oldToken = m_current_token;
|
||||
auto old_token = m_current_token;
|
||||
m_current_token = m_lexer.next();
|
||||
return oldToken;
|
||||
return old_token;
|
||||
}
|
||||
|
||||
Token Parser::consume(TokenType type)
|
||||
|
|
|
|||
|
|
@ -31,6 +31,12 @@
|
|||
#include <AK/NonnullOwnPtr.h>
|
||||
|
||||
namespace JS {
|
||||
|
||||
enum class Associativity {
|
||||
Left,
|
||||
Right
|
||||
};
|
||||
|
||||
class Parser {
|
||||
public:
|
||||
explicit Parser(Lexer lexer);
|
||||
|
|
@ -44,15 +50,17 @@ public:
|
|||
NonnullOwnPtr<VariableDeclaration> parse_variable_declaration();
|
||||
NonnullOwnPtr<ForStatement> parse_for_statement();
|
||||
|
||||
NonnullOwnPtr<Expression> parse_expression();
|
||||
NonnullOwnPtr<Expression> parse_expression(int min_precedence, Associativity associate = Associativity::Right);
|
||||
NonnullOwnPtr<Expression> parse_primary_expression();
|
||||
NonnullOwnPtr<ObjectExpression> parse_object_expression();
|
||||
NonnullOwnPtr<Expression> parse_secondary_expression(NonnullOwnPtr<Expression>);
|
||||
NonnullOwnPtr<Expression> parse_secondary_expression(NonnullOwnPtr<Expression>, int min_precedence, Associativity associate = Associativity::Right);
|
||||
NonnullOwnPtr<CallExpression> parse_call_expression(NonnullOwnPtr<Expression>);
|
||||
|
||||
bool has_errors() const { return m_has_errors; }
|
||||
|
||||
private:
|
||||
int operator_precedence(TokenType) const;
|
||||
Associativity operator_associativity(TokenType) const;
|
||||
bool match_expression() const;
|
||||
bool match_secondary_expression() const;
|
||||
bool match_statement() const;
|
||||
|
|
|
|||
|
|
@ -25,6 +25,7 @@
|
|||
*/
|
||||
|
||||
#include "Token.h"
|
||||
#include <AK/Assertions.h>
|
||||
|
||||
namespace JS {
|
||||
|
||||
|
|
@ -37,14 +38,20 @@ const char* Token::name(TokenType type)
|
|||
return "AmpersandEquals";
|
||||
case TokenType::Asterisk:
|
||||
return "Asterisk";
|
||||
case TokenType::AsteriskAsteriskEquals:
|
||||
return "AsteriskAsteriskEquals";
|
||||
case TokenType::AsteriskEquals:
|
||||
return "AsteriskEquals";
|
||||
case TokenType::Await:
|
||||
return "Await";
|
||||
case TokenType::BoolLiteral:
|
||||
return "BoolLiteral";
|
||||
case TokenType::BracketOpen:
|
||||
return "BracketOpen";
|
||||
case TokenType::BracketClose:
|
||||
return "BracketClose";
|
||||
case TokenType::Caret:
|
||||
return "Caret";
|
||||
case TokenType::Catch:
|
||||
return "Catch";
|
||||
case TokenType::Class:
|
||||
|
|
@ -63,8 +70,12 @@ const char* Token::name(TokenType type)
|
|||
return "Do";
|
||||
case TokenType::DoubleAmpersand:
|
||||
return "DoubleAmpersand";
|
||||
case TokenType::DoubleAsterisk:
|
||||
return "DoubleAsterisk";
|
||||
case TokenType::DoublePipe:
|
||||
return "DoublePipe";
|
||||
case TokenType::DoubleQuestionMark:
|
||||
return "DoubleQuestionMark";
|
||||
case TokenType::Else:
|
||||
return "Else";
|
||||
case TokenType::Eof:
|
||||
|
|
@ -77,6 +88,8 @@ const char* Token::name(TokenType type)
|
|||
return "ExclamationMark";
|
||||
case TokenType::ExclamationMarkEquals:
|
||||
return "ExclamationMarkEquals";
|
||||
case TokenType::ExclamationMarkEqualsEquals:
|
||||
return "ExclamationMarkEqualsEquals";
|
||||
case TokenType::Finally:
|
||||
return "Finally";
|
||||
case TokenType::Function:
|
||||
|
|
@ -87,6 +100,10 @@ const char* Token::name(TokenType type)
|
|||
return "Identifier";
|
||||
case TokenType::If:
|
||||
return "If";
|
||||
case TokenType::In:
|
||||
return "In";
|
||||
case TokenType::Instanceof:
|
||||
return "Instanceof";
|
||||
case TokenType::Interface:
|
||||
return "Interface";
|
||||
case TokenType::Invalid:
|
||||
|
|
@ -129,6 +146,8 @@ const char* Token::name(TokenType type)
|
|||
return "PlusPlus";
|
||||
case TokenType::QuestionMark:
|
||||
return "QuestionMark";
|
||||
case TokenType::QuestionMarkPeriod:
|
||||
return "QuestionMarkPeriod";
|
||||
case TokenType::RegexLiteral:
|
||||
return "RegexLiteral";
|
||||
case TokenType::Return:
|
||||
|
|
@ -137,21 +156,38 @@ const char* Token::name(TokenType type)
|
|||
return "Semicolon";
|
||||
case TokenType::ShiftLeft:
|
||||
return "ShiftLeft";
|
||||
case TokenType::ShiftLeftEquals:
|
||||
return "ShiftLeftEquals";
|
||||
case TokenType::ShiftRight:
|
||||
return "ShiftRight";
|
||||
case TokenType::ShiftRightEquals:
|
||||
return "ShiftRightEquals";
|
||||
case TokenType::Slash:
|
||||
return "Slash";
|
||||
case TokenType::SlashEquals:
|
||||
return "SlashEquals";
|
||||
case TokenType::StringLiteral:
|
||||
return "StringLiteral";
|
||||
case TokenType::Tilde:
|
||||
return "Tilde";
|
||||
case TokenType::Try:
|
||||
return "Try";
|
||||
case TokenType::Typeof:
|
||||
return "Typeof";
|
||||
case TokenType::UnsignedShiftRight:
|
||||
return "UnsignedShiftRight";
|
||||
case TokenType::UnsignedShiftRightEquals:
|
||||
return "UnsignedShiftRightEquals";
|
||||
case TokenType::Var:
|
||||
return "Var";
|
||||
case TokenType::Void:
|
||||
return "Void";
|
||||
case TokenType::While:
|
||||
return "While";
|
||||
case TokenType::Yield:
|
||||
return "Yield";
|
||||
default:
|
||||
ASSERT_NOT_REACHED();
|
||||
return "<Unknown>";
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -35,10 +35,13 @@ enum class TokenType {
|
|||
Ampersand,
|
||||
AmpersandEquals,
|
||||
Asterisk,
|
||||
AsteriskAsteriskEquals,
|
||||
AsteriskEquals,
|
||||
Await,
|
||||
BoolLiteral,
|
||||
BracketClose,
|
||||
BracketOpen,
|
||||
Caret,
|
||||
Catch,
|
||||
Class,
|
||||
Comma,
|
||||
|
|
@ -48,7 +51,9 @@ enum class TokenType {
|
|||
Delete,
|
||||
Do,
|
||||
DoubleAmpersand,
|
||||
DoubleAsterisk,
|
||||
DoublePipe,
|
||||
DoubleQuestionMark,
|
||||
Else,
|
||||
Eof,
|
||||
Equals,
|
||||
|
|
@ -64,6 +69,8 @@ enum class TokenType {
|
|||
GreaterThanEquals,
|
||||
Identifier,
|
||||
If,
|
||||
In,
|
||||
Instanceof,
|
||||
Interface,
|
||||
Invalid,
|
||||
LessThan,
|
||||
|
|
@ -86,17 +93,26 @@ enum class TokenType {
|
|||
PlusEquals,
|
||||
PlusPlus,
|
||||
QuestionMark,
|
||||
QuestionMarkPeriod,
|
||||
RegexLiteral,
|
||||
Return,
|
||||
Semicolon,
|
||||
ShiftLeft,
|
||||
ShiftLeftEquals,
|
||||
ShiftRight,
|
||||
ShiftRightEquals,
|
||||
Slash,
|
||||
SlashEquals,
|
||||
StringLiteral,
|
||||
Tilde,
|
||||
Try,
|
||||
Typeof,
|
||||
UnsignedShiftRight,
|
||||
UnsignedShiftRightEquals,
|
||||
Var,
|
||||
While
|
||||
Void,
|
||||
While,
|
||||
Yield,
|
||||
};
|
||||
|
||||
class Token {
|
||||
|
|
@ -125,3 +141,11 @@ private:
|
|||
};
|
||||
|
||||
}
|
||||
|
||||
namespace AK {
|
||||
template<>
|
||||
struct Traits<JS::TokenType> : public GenericTraits<JS::TokenType> {
|
||||
static constexpr bool is_trivial() { return true; }
|
||||
static unsigned hash(JS::TokenType t) { return int_hash((int)t); }
|
||||
};
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue