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core: parseExactChar

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Nathan McCarty 2025-01-24 22:36:08 -05:00
parent 40dd87a4f3
commit 7dba492535
1 changed files with 13 additions and 0 deletions
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13
src/Parser/Interface.md
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@ -185,6 +185,19 @@ parseString' : Parser (List1 Char) -> Parser String
parseString' x = parseString $ map forget x
```
Attempt to parse a specified character
```idris
export
parseExactChar : Char -> Parser Char
parseExactChar c = do
result <- parseChar (== c) id
case result of
GotChar char => pure char
GotError err => throwParseError "Got \{show err} Expected \{show c}"
EndOfInput => throwParseError "End of input"
```
### Composition of boolean functions
```idris