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LibJS: Lex single quote strings, escaped chars and unterminated strings

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This commit is contained in:
Stephan Unverwerth
2020-03-14 11:45:25 +01:00
committed by Andreas Kling
parent d439013903
commit c0e6234219
5 changed files with 33 additions and 4 deletions
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23
Libraries/LibJS/Lexer.cpp
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@@ -169,6 +169,12 @@ bool Lexer::is_block_comment_end() const
return m_current_char == '*' && m_position < m_source.length() && m_source[m_position] == '/';
}
void Lexer::syntax_error(const char* msg)
{
m_has_errors = true;
fprintf(stderr, "Syntax Error: %s\n", msg);
}
Token Lexer::next()
{
size_t trivia_start = m_position;
@@ -218,13 +224,22 @@ Token Lexer::next()
consume();
}
token_type = TokenType::NumericLiteral;
} else if (m_current_char == '"') {
} else if (m_current_char == '"' || m_current_char == '\'') {
char stop_char = m_current_char;
consume();
while (m_current_char != '"' && !is_eof()) {
while (m_current_char != stop_char && m_current_char != '\n' && !is_eof()) {
if (m_current_char == '\\') {
consume();
}
consume();
}
consume();
token_type = TokenType::StringLiteral;
if (m_current_char != stop_char) {
syntax_error("unterminated string literal");
token_type = TokenType::UnterminatedStringLiteral;
} else {
consume();
token_type = TokenType::StringLiteral;
}
} else if (m_current_char == EOF) {
token_type = TokenType::Eof;
} else {