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LibJS: Add TokenType::TemplateLiteral

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This is required for template literals - we're not quite there yet, but at
least the parser can now tell us when this token is encountered -
currently this yields "Unexpected token Invalid". Not really helpful.

The character is a "backtick", but as we already have
TokenType::{StringLiteral,RegexLiteral} this seemed like a fitting name.

This also enables syntax highlighting for template literals in the js
REPL and LibGUI's JSSyntaxHighlighter.
This commit is contained in:
Linus Groh
2020-04-24 00:20:02 +01:00
committed by Andreas Kling
parent 57caca3171
commit 95b51e857d
6 changed files with 13 additions and 3 deletions
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7
Libraries/LibJS/Lexer.cpp
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@@ -337,7 +337,7 @@ Token Lexer::next()
}
}
token_type = TokenType::NumericLiteral;
} else if (m_current_char == '"' || m_current_char == '\'') {
} else if (m_current_char == '"' || m_current_char == '\'' || m_current_char == '`') {
char stop_char = m_current_char;
consume();
while (m_current_char != stop_char && m_current_char != '\n' && !is_eof()) {
@@ -351,7 +351,10 @@ Token Lexer::next()
token_type = TokenType::UnterminatedStringLiteral;
} else {
consume();
token_type = TokenType::StringLiteral;
if (stop_char == '`')
token_type = TokenType::TemplateLiteral;
else
token_type = TokenType::StringLiteral;
}
} else if (m_current_char == EOF) {
token_type = TokenType::Eof;