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Allow non-custom reserved symbols in custom syntax.

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This commit is contained in:
Stephen Chung
2021-12-16 18:01:49 +08:00
parent f92cbe1f6d
commit fbc2b1f13d
8 changed files with 77 additions and 60 deletions
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11
src/tokenizer.rs
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@@ -2213,14 +2213,9 @@ impl<'a> Iterator for TokenIterator<'a> {
)),
// Reserved keyword/operator that is custom.
(_, true) => Token::Custom(s),
// Reserved operator that is not custom.
(token, false) if !is_valid_identifier(token.chars()) => {
let msg = format!("'{}' is a reserved symbol", token);
Token::LexError(LERR::ImproperSymbol(s.to_string(), msg))
},
// Reserved keyword that is not custom and disabled.
(token, false) if self.engine.disabled_symbols.contains(token) => {
let msg = format!("reserved symbol '{}' is disabled", token);
let msg = format!("reserved {} '{}' is disabled", if is_valid_identifier(token.chars()) { "keyword"} else {"symbol"}, token);
Token::LexError(LERR::ImproperSymbol(s.to_string(), msg))
},
// Reserved keyword/operator that is not custom.
@@ -2230,14 +2225,14 @@ impl<'a> Iterator for TokenIterator<'a> {
Some((Token::Identifier(s), pos)) if self.engine.custom_keywords.contains_key(&*s) => {
(Token::Custom(s), pos)
}
// Custom standard keyword/symbol - must be disabled
// Custom keyword/symbol - must be disabled
Some((token, pos)) if self.engine.custom_keywords.contains_key(&*token.syntax()) => {
if self.engine.disabled_symbols.contains(&*token.syntax()) {
// Disabled standard keyword/symbol
(Token::Custom(token.syntax().into()), pos)
} else {
// Active standard keyword - should never be a custom keyword!
unreachable!("{:?} is an active keyword", token)
unreachable!("`{:?}` is an active keyword", token)
}
}
// Disabled symbol