4 releases
| 0.3.4 | Apr 18, 2020 |
|---|---|
| 0.3.3 | Apr 5, 2020 |
| 0.3.2 | Apr 1, 2020 |
| 0.3.1 | Apr 1, 2020 |
#24 in #latin
80KB
2K
SLoC
parsers
Description
The library of parser combinators. Using rules, you can express a grammar of any language. Here is common rules such as "latin" or "any". Also rule combinators: "or", "cat", "range" and etc.
Common rules
| Type | Match | Constructor |
|---|---|---|
| Dec | 0...9 |
dec() |
| Bin | 0 or 1 |
bin() |
| Oct | 0...7 |
oct() |
| Hex | 0...9 or A...F |
hex() |
| Space | |
space() |
| White | \r\n or or \n or \r or \t |
white() |
| Whites | Applies White multiple times |
whites() |
| Nl | \r\n or \n or \r |
nl() |
| Latin | a...z or A...Z |
latin() |
| Any | Any char | any() |
| End | Checks rest input is empty | end() |
Combinators
| Type | Description | Operator / Constructor |
|---|---|---|
| Fst | Parses x and y then return x | x << y |
| Snd | Parses x and y then return y | x >> y |
| Or | Parses x or y | x | y |
| Cat | Parses x and y then concat result | x.cat(y) |
| AndThen | Parses x and then applies result to f and parses it | x.and_then(f) |
| OrElse | Parses x or else applies error to f and parses it | x.or_else(f) |
| CharRange | Parses char range | char_range(a..=b) |
| Not | Parses x and reverse result | !x |
| Opt | Makes rule x optional and return Option |
x.opt() |
| OrDefault | Makes rule x optional and return default | x.or_default() |
| Pred | Applies predicate p to char and return it if true | x.pred(p) |
| Range | Parses x multiple times | x.range(0..n) |
| Until | Parses x until y | x.until(y) |
| Ret | Always returns value v | ret(v) |
| RetErr | Always returns error e | ret_err(e) |
| Map | Parses x then apply function f to successful result | x.map(f) |
| MapErr | Parses x then apply function f to error result | x.map_err(f) |
| Into | Parses x and convert result to Type |
into::<Type>(x) |