Utility Types
The teleparse::tp module provides utility types for language constructs that are hard to or not
directly representable in a grammar. For example, a list of items separated by a delimiter,
Examples of Common Utility Types
| Type | Description |
|---|---|
tp::Option<T> | An optional syntax tree T |
tp::Exists<T> | A boolean value to test if an optional syntax tree T is present |
tp::String<T> | Source of the syntax tree T stored in a String |
tp::Vec<T> | A list of syntax trees T stored in a Vec |
tp::VecDeque<T> | A list of syntax trees T stored in a VecDeque |
tp::Nev<T> | A non-empty vector of syntax trees T stored in a Vec |
tp::NevDeque<T> | A non-empty vector of syntax trees T stored in a VecDeque |
tp::Loop<T> | A loop that tries to parse T until the end of input |
tp::Split<T, P> | A list of syntax trees T separated by a delimiter P |
tp::Punct<T, P> | A list of syntax trees T separated by a delimiter P, with optional trailing delimiter |
tp::Recover<T, R> | A recover boundary. If T fails to be parsed, the parser will skip until R is found |
There are other utility types that are used less often.
Blanket Types
Besides the utility types above, teleparse also provide syntax tree implementation for some types in the Rust standard library:
Box<T>for any syntax treeT- Tuples up to 5 elements (e.g.
(T1, T2, T3, T4, T5))