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Support for trailing commas.

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This commit is contained in:
Stephen Chung
2020-06-16 22:14:46 +08:00
parent dc540755e7
commit 1adf3cc39a
11 changed files with 173 additions and 128 deletions
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10
src/token.rs
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@@ -294,7 +294,7 @@ impl Token {
Export => "export",
As => "as",
EOF => "{EOF}",
_ => panic!("operator should be match in outer scope"),
_ => unreachable!("operator should be match in outer scope"),
})
.into(),
}
@@ -548,7 +548,7 @@ impl<'a> TokenIterator<'a> {
'x' => 2,
'u' => 4,
'U' => 8,
_ => panic!("should be 'x', 'u' or 'U'"),
_ => unreachable!(),
};
for _ in 0..len {
@@ -667,14 +667,14 @@ impl<'a> TokenIterator<'a> {
'0', '1', '_', '_', '_', '_', '_', '_', '_', '_', '_', '_',
'_', '_', '_', '_', '_', '_', '_', '_', '_', '_', '_',
],
_ => panic!("unexpected character {}", ch),
_ => unreachable!(),
};
radix_base = Some(match ch {
'x' | 'X' => 16,
'o' | 'O' => 8,
'b' | 'B' => 2,
_ => panic!("unexpected character {}", ch),
_ => unreachable!(),
});
while let Some(next_char_in_hex) = self.peek_next() {
@@ -1077,7 +1077,7 @@ impl<'a> TokenIterator<'a> {
}
('~', _) => return Some((Token::PowerOf, pos)),
('\0', _) => panic!("should not be EOF"),
('\0', _) => unreachable!(),
(ch, _) if ch.is_whitespace() => (),
(ch, _) => return Some((Token::LexError(Box::new(LERR::UnexpectedChar(ch))), pos)),