53 lines
1.3 KiB
Rust
53 lines
1.3 KiB
Rust
use nom::{
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bytes::complete::tag,
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character::complete::space0,
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error::ErrorKind,
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sequence::{delimited, tuple},
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IResult, InputTakeAtPosition, Parser,
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};
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pub fn account(input: &str) -> IResult<&str, &str> {
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input.split_at_position1_complete(|item| item == ' ' || item == '\t', ErrorKind::AlphaNumeric)
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}
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pub fn metadatum(input: &str) -> IResult<&str, (&str, &str)> {
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tuple((
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delimited(tag("-"), delimited(space0, key, space0), tag(":")),
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value,
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))
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.map(|v| (v.0, v.1.trim()))
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.parse(input)
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}
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pub fn key(input: &str) -> IResult<&str, &str> {
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input.split_at_position1_complete(|item| item == ':', ErrorKind::AlphaNumeric)
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}
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pub fn value(input: &str) -> IResult<&str, &str> {
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input.split_at_position1_complete(|_| false, ErrorKind::AlphaNumeric)
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn parse_metadatum() {
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assert_eq!(
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metadatum("- key: value").unwrap().1,
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("key".into(), "value".into())
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);
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assert_eq!(
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metadatum("- key space: value space").unwrap().1,
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("key space".into(), "value space".into())
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);
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}
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#[test]
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fn parse_metadatum_invalid() {
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assert!(metadatum("- key:").is_err());
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assert!(metadatum("- : value").is_err());
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assert!(metadatum("- : ").is_err());
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}
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}
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