///|
pub impl TokenRecognizer for RdfLexer with fn recognize_next_token(
self : RdfLexer,
data : ArrayView[Byte],
is_ending : Bool,
options : LexerOptions?,
location_ctx : SourcePos,
) -> (Int, Result[LocatedTokenOrLineJump, TokenRecognizerError])? {
let base_iri_opt = match options {
Some(options) =>
match options.base_iri {
Some(iri_str) => {
let iri_ref = iri_str.as_ref()
if self.lenient {
// 宽松模式：使用 unchecked 解析，即使格式不完美也尝试使用
Some(IriRef::parse_unchecked(iri_ref))
} else {
// 严格模式：必须通过标准解析验证
match IriRef::parse(iri_ref) {
Ok(parsed_iri) => Some(parsed_iri)
Err(_) => None
}
}
}
None => None
}
None => None
}
let options = LexerOptions::default(base_iri_opt)
if data.is_empty() {
return None
}
// 辅助函数：构建基于 location_ctx 的 Range
let make_range = fn(start_offset : Int, length : Int) -> Range {
Range(start_offset, start_offset + length)
}
match data[0] {
b'<' =>
match data.get(1) {
Some(b'<') =>
if data.get(2) == Some(b'(') {
Some(
(
3,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("<<("),
make_range(location_ctx.offset, 3),
),
),
),
),
)
} else {
Some(
(
2,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("<<"),
make_range(location_ctx.offset, 2),
),
),
),
),
)
}
Some(b'=') if self.mode == RdfLexerMode::N3 =>
if self.recognize_iri(data, options, location_ctx)
is Some((consumed, result)) {
Some(
if result is Ok(result) {
(consumed, Ok(result))
} else {
(
2,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("<="),
make_range(location_ctx.offset, 2),
),
),
),
)
},
)
} else if is_ending {
Some(
(
2,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("<="),
make_range(location_ctx.offset, 2),
),
),
),
),
)
} else {
None
}
Some(b'-') if self.mode == RdfLexerMode::N3 =>
if self.recognize_iri(data, options, location_ctx)
is Some((consumed, result)) {
Some(
if result is Ok(result) {
(consumed, Ok(result))
} else {
(
2,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("<-"),
make_range(location_ctx.offset, 2),
),
),
),
)
},
)
} else if is_ending {
Some(
(
2,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("<-"),
make_range(location_ctx.offset, 2),
),
),
),
),
)
} else {
None
}
_ => self.recognize_iri(data, options, location_ctx)
}
b'>' =>
if data.get(1) == Some(b'>') {
Some(
(
2,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation(">>"),
make_range(location_ctx.offset, 2),
),
),
),
),
)
} else {
Some(
(
1,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation(">"),
make_range(location_ctx.offset, 1),
),
),
),
),
)
}
b'_' =>
match data.get(1) {
Some(b':') =>
RdfLexer::recognize_blank_node_label(data, is_ending, location_ctx)
Some(c) =>
Some(
(
1,
Err(
TokenRecognizerError::InvalidToken(
[c],
make_range(location_ctx.offset + 1, 1),
),
),
),
)
None =>
Some(
(
1,
Err(
TokenRecognizerError::UnexpectedEndOfInput(
data[0:1],
make_range(location_ctx.offset, 1),
),
),
),
)
}
b'"' =>
if self.mode != RdfLexerMode::NTriples &&
data.get(1) == Some(b'"') &&
data.get(2) == Some(b'"') {
self.recognize_long_string(data, b'"', is_ending, location_ctx)
} else {
self.recognize_string(data, b'"', is_ending, location_ctx)
}
b'\'' if self.mode != RdfLexerMode::NTriples =>
if data.get(1) == Some(b'\'') && data.get(2) == Some(b'\'') {
self.recognize_long_string(data, b'\'', is_ending, location_ctx)
} else {
self.recognize_string(data, b'\'', is_ending, location_ctx)
}
b'@' => self.recognize_lang_tag(data, location_ctx)
b'.' =>
match data.get(1) {
Some(b'0'..=b'9') =>
RdfLexer::recognize_number(data, is_ending, location_ctx)
Some(_) =>
Some(
(
1,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("."),
make_range(location_ctx.offset, 1),
),
),
),
),
)
None =>
if is_ending {
Some(
(
1,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("."),
make_range(location_ctx.offset, 1),
),
),
),
),
)
} else {
None
}
}
b'^' =>
if data.get(1) == Some(b'^') {
Some(
(
2,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("^^"),
make_range(location_ctx.offset, 2),
),
),
),
),
)
} else {
Some(
(
1,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("^"),
make_range(location_ctx.offset, 1),
),
),
),
),
)
}
b'(' =>
Some(
(
1,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("("),
make_range(location_ctx.offset, 1),
),
),
),
),
)
b')' =>
if data.get(1) == Some(b'>') && data.get(2) == Some(b'>') {
Some(
(
3,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation(")>>"),
make_range(location_ctx.offset, 3),
),
),
),
),
)
} else {
Some(
(
1,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation(")"),
make_range(location_ctx.offset, 1),
),
),
),
),
)
}
b'[' =>
Some(
(
1,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("["),
make_range(location_ctx.offset, 1),
),
),
),
),
)
b']' =>
Some(
(
1,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("]"),
make_range(location_ctx.offset, 1),
),
),
),
),
)
b'{' =>
if data.get(1) == Some(b'|') {
Some(
(
2,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("{|"),
make_range(location_ctx.offset, 2),
),
),
),
),
)
} else {
Some(
(
1,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("{"),
make_range(location_ctx.offset, 1),
),
),
),
),
)
}
b'}' =>
Some(
(
1,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("}"),
make_range(location_ctx.offset, 1),
),
),
),
),
)
b',' =>
Some(
(
1,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation(","),
make_range(location_ctx.offset, 1),
),
),
),
),
)
b';' =>
Some(
(
1,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation(";"),
make_range(location_ctx.offset, 1),
),
),
),
),
)
b'!' =>
Some(
(
1,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("!"),
make_range(location_ctx.offset, 1),
),
),
),
),
)
b'|' =>
if data.get(1) == Some(b'}') {
Some(
(
2,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("|}"),
make_range(location_ctx.offset, 2),
),
),
),
),
)
} else {
Some(
(
1,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("|"),
make_range(location_ctx.offset, 1),
),
),
),
),
)
}
b'=' =>
if data.get(1) == Some(b'>') {
Some(
(
2,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("=>"),
make_range(location_ctx.offset, 2),
),
),
),
),
)
} else {
Some(
(
1,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("="),
make_range(location_ctx.offset, 1),
),
),
),
),
)
}
b'~' =>
Some(
(
1,
Ok(
LocatedTokenOrLineJump::LocatedN3Token(
LocatedN3Token(
N3Token::Punctuation("~"),
make_range(location_ctx.offset, 1),
),
),
),
),
)
b'0'..=b'9' | b'+' | b'-' =>
RdfLexer::recognize_number(data, is_ending, location_ctx)
b'?' => self.recognize_variable(data, is_ending, location_ctx)
_ => self.recognize_pname_or_keyword(data, is_ending, location_ctx)
}
}