asya/toml-rs
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Adjust spans for more complex types

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This commit is contained in:
John-John Tedro 2018-05-07 04:05:05 +02:00
parent 6b919f8833
commit 09c8957ae7
3 changed files with 67 additions and 27 deletions
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52
src/de.rs
View file

@ -821,16 +821,20 @@ impl<'a> Deserializer<'a> {
Value { e: E::Boolean(false), start: start, end: end }
}
Some((span, Token::Keylike(key))) => self.number_or_date(span, key)?,
Some((_, Token::Plus)) => self.number_leading_plus()?,
Some((Span { start, end }, Token::LeftBrace)) => {
self.inline_table().map(|table| Value {
Some((span, Token::Plus)) => self.number_leading_plus(span)?,
Some((Span { start, .. }, Token::LeftBrace)) => {
self.inline_table().map(|(Span { end, .. }, table)| Value {
e: E::InlineTable(table),
start: start,
end: end
})?
}
Some((Span { start, end }, Token::LeftBracket)) => {
self.array().map(|array| Value { e: E::Array(array), start: start, end: end })?
Some((Span { start, .. }, Token::LeftBracket)) => {
self.array().map(|(Span { end, .. }, array)| Value {
e: E::Array(array),
start: start,
end: end
})?
}
Some(token) => {
return Err(self.error(at, ErrorKind::Wanted {
@ -882,11 +886,13 @@ impl<'a> Deserializer<'a> {
}
}
fn number_leading_plus(&mut self) -> Result<Value<'a>, Error> {
let start = self.tokens.current();
fn number_leading_plus(&mut self, Span { start, .. }: Span) -> Result<Value<'a>, Error> {
let start_token = self.tokens.current();
match self.next()? {
Some((span, Token::Keylike(s))) => self.number(span, s),
_ => Err(self.error(start, ErrorKind::NumberInvalid)),
Some((Span { end, .. }, Token::Keylike(s))) => {
self.number(Span { start: start, end: end }, s)
},
_ => Err(self.error(start_token, ErrorKind::NumberInvalid)),
}
}
@ -1042,11 +1048,11 @@ impl<'a> Deserializer<'a> {
// TODO(#140): shouldn't buffer up this entire table in memory, it'd be
// great to defer parsing everything until later.
fn inline_table(&mut self) -> Result<Vec<(Cow<'a, str>, Value<'a>)>, Error> {
fn inline_table(&mut self) -> Result<(Span, Vec<(Cow<'a, str>, Value<'a>)>), Error> {
let mut ret = Vec::new();
self.eat_whitespace()?;
if self.eat(Token::RightBrace)? {
return Ok(ret)
if let Some(span) = self.eat_spanned(Token::RightBrace)? {
return Ok((span, ret))
}
loop {
let key = self.table_key()?;
@ -1056,8 +1062,8 @@ impl<'a> Deserializer<'a> {
ret.push((key, self.value()?));
self.eat_whitespace()?;
if self.eat(Token::RightBrace)? {
return Ok(ret)
if let Some(span) = self.eat_spanned(Token::RightBrace)? {
return Ok((span, ret))
}
self.expect(Token::Comma)?;
self.eat_whitespace()?;
@ -1066,7 +1072,7 @@ impl<'a> Deserializer<'a> {
// TODO(#140): shouldn't buffer up this entire array in memory, it'd be
// great to defer parsing everything until later.
fn array(&mut self) -> Result<Vec<Value<'a>>, Error> {
fn array(&mut self) -> Result<(Span, Vec<Value<'a>>), Error> {
let mut ret = Vec::new();
let intermediate = |me: &mut Deserializer| {
@ -1081,8 +1087,8 @@ impl<'a> Deserializer<'a> {
loop {
intermediate(self)?;
if self.eat(Token::RightBracket)? {
return Ok(ret)
if let Some(span) = self.eat_spanned(Token::RightBracket)? {
return Ok((span, ret))
}
let at = self.tokens.current();
let value = self.value()?;
@ -1098,8 +1104,8 @@ impl<'a> Deserializer<'a> {
}
}
intermediate(self)?;
self.expect(Token::RightBracket)?;
Ok(ret)
let span = self.expect_spanned(Token::RightBracket)?;
Ok((span, ret))
}
fn table_key(&mut self) -> Result<Cow<'a, str>, Error> {
@ -1122,10 +1128,18 @@ impl<'a> Deserializer<'a> {
self.tokens.eat(expected).map_err(|e| self.token_error(e))
}
fn eat_spanned(&mut self, expected: Token<'a>) -> Result<Option<Span>, Error> {
self.tokens.eat_spanned(expected).map_err(|e| self.token_error(e))
}
fn expect(&mut self, expected: Token<'a>) -> Result<(), Error> {
self.tokens.expect(expected).map_err(|e| self.token_error(e))
}
fn expect_spanned(&mut self, expected: Token<'a>) -> Result<Span, Error> {
self.tokens.expect_spanned(expected).map_err(|e| self.token_error(e))
}
fn next(&mut self) -> Result<Option<(Span, Token<'a>)>, Error> {
self.tokens.next().map_err(|e| self.token_error(e))
}

29
src/tokens.rs
View file

@ -118,21 +118,34 @@ impl<'a> Tokenizer<'a> {
}
pub fn eat(&mut self, expected: Token<'a>) -> Result<bool, Error> {
match self.peek()? {
Some((_, ref found)) if expected == *found => {}
Some(_) => return Ok(false),
None => return Ok(false),
}
self.eat_spanned(expected).map(|s| s.is_some())
}
/// Eat a value, returning it's span if it was consumed.
pub fn eat_spanned(&mut self, expected: Token<'a>) -> Result<Option<Span>, Error> {
let span = match self.peek()? {
Some((span, ref found)) if expected == *found => span,
Some(_) => return Ok(None),
None => return Ok(None),
};
drop(self.next());
Ok(true)
Ok(Some(span))
}
pub fn expect(&mut self, expected: Token<'a>) -> Result<(), Error> {
// ignore span
let _ = self.expect_spanned(expected)?;
Ok(())
}
/// Expect the given token returning its span.
pub fn expect_spanned(&mut self, expected: Token<'a>) -> Result<Span, Error> {
let current = self.current();
match self.next()? {
Some((_, found)) => {
Some((span, found)) => {
if expected == found {
Ok(())
Ok(span)
} else {
Err(Error::Wanted {
at: current,

13
test-suite/tests/spanned.rs
View file

@ -23,8 +23,21 @@ fn test_spanned_field() {
good::<String>("foo = \"foo\"", "\"foo\"");
good::<u32>("foo = 42", "42");
// leading plus
good::<u32>("foo = +42", "+42");
// table
good::<HashMap<String, u32>>(
"foo = {\"foo\" = 42, \"bar\" = 42}",
"{\"foo\" = 42, \"bar\" = 42}"
);
// array
good::<Vec<u32>>(
"foo = [0, 1, 2, 3, 4]",
"[0, 1, 2, 3, 4]"
);
// datetime
good::<String>(
"foo = \"1997-09-09T09:09:09Z\"",
"\"1997-09-09T09:09:09Z\""
);
}