json_tools/
iter_ext.rs

1use super::{FilterTypedKeyValuePairs, Token, TokenReader, TokenType};
2
3/// Applies convenience constructors to all `Iterator<Item=Token>` types
4pub trait IteratorExt: Iterator<Item = Token> {
5    /// Returns an Iterator which filters key=value pairs, if `value.kind` matches
6    /// the given `token_type`.
7    ///
8    /// It is useful, for example, to get rid of `null` values on a lexical level.
9    fn filter_key_value_by_type(self, token_type: TokenType) -> FilterTypedKeyValuePairs<Self>
10    where
11        Self: Sized,
12    {
13        FilterTypedKeyValuePairs::new(self, token_type)
14    }
15
16    /// Returns a `TokenReader` to produce a byte stream from `Token` instances
17    ///
18    /// # Arguments
19    /// * `source` - an optional, original string from which the tokens were
20    ///              generated. This offers the best performance when
21    ///              serializing tokens, as they can refer to their original
22    ///              `&str` slice.
23    fn reader(self, source: Option<&str>) -> TokenReader<Self>
24    where
25        Self: Sized,
26    {
27        TokenReader::new(self, source)
28    }
29}
30
31impl<T: Iterator<Item = Token>> IteratorExt for T {}
json_tools/iter_ext.rs

json_tools/
iter_ext.rs
