core/low: add trim type
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parent
d036fd2d90
commit
4a74324ff2
6 changed files with 98 additions and 6 deletions
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@ -26,6 +26,7 @@ number = []
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bool = []
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vec = []
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tuple = []
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low-level = []
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[dependencies]
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@ -38,4 +39,4 @@ required-features = ["vec", "number"]
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[[example]]
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name = "dotenv"
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required-features = ["vec", "tuple"]
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required-features = ["vec", "tuple", "low-level"]
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@ -1,12 +1,13 @@
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use estring::{EString, Pair, SepVec};
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use estring::{EString, Pair, SepVec, Trim};
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const DOTENV_CONTENT: &str = "\
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const DOTENV_CONTENT: &str = "
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DATABASE_URL=postgres://user:password@localhost:5432/recipes
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APP_HOST=http://localhost:3000";
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APP_HOST=http://localhost:3000
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";
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fn main() -> Result<(), estring::ParseError> {
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EString::from(DOTENV_CONTENT)
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.parse::<SepVec<Pair<&str, '=', &str>, '\n'>>()?
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.parse::<Trim<SepVec<Pair<&str, '=', &str>, '\n'>>>()?
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.iter()
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.for_each(|p @ Pair(key, value)| {
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println!("pair: {}", p);
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@ -16,6 +16,11 @@ pub mod tuple;
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#[cfg(feature = "tuple")]
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pub use tuple::*;
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#[cfg(feature = "low-level")]
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pub mod low;
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#[cfg(feature = "low-level")]
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pub use low::*;
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use crate::ParseError;
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use std::convert::{Infallible, TryFrom};
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7
src/core/low.rs
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7
src/core/low.rs
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@ -0,0 +1,7 @@
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//! Contains the low-level api parse string more accurate!
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//!
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//! **NOTE**: Require the enabling the `low-level` feature.
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//!
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mod trim;
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pub use trim::*;
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78
src/core/low/trim.rs
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78
src/core/low/trim.rs
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@ -0,0 +1,78 @@
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use crate::core::EString;
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use std::convert::TryFrom;
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//===========================================================================//
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// TRIM //
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//===========================================================================//
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/// Wrapper that allow to trim substring before continue
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///
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/// **NOTE**: Required the enabling of the `low-level` feature.
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///
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/// # Examples
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///
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/// ```rust
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/// use estring::{EString, Trim};
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///
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/// fn main() -> Result<(), estring::ParseError> {
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/// let res = EString::from(" 99 ").parse::<Trim<i32>>()?;
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/// assert_eq!(res, Trim(99));
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/// Ok(())
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/// }
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/// ```
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///
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#[derive(Debug, PartialEq, Eq)]
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pub struct Trim<T>(pub T);
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impl<T> std::ops::Deref for Trim<T> {
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type Target = T;
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fn deref(&self) -> &Self::Target {
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&self.0
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}
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}
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impl<T: std::fmt::Display> std::fmt::Display for Trim<T> {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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write!(f, "{}", self.0)
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}
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}
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impl<T> TryFrom<EString> for Trim<T>
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where
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T: TryFrom<EString>,
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{
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type Error = ();
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fn try_from(value: EString) -> Result<Self, Self::Error> {
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T::try_from(EString::from(value.trim()))
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.map(Trim)
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.map_err(|_| ())
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}
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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 should_trim_string() {
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let estr = EString::from(" 999 ");
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match estr.parse::<Trim<&str>>() {
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Ok(res) => assert_eq!(*res, "999"),
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_ => unreachable!(),
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}
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}
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#[cfg(feature = "number")]
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#[test]
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fn should_trim_and_convert_to_number() {
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let estr = EString::from(" 999 ");
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match estr.parse::<Trim<i32>>() {
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Ok(res) => assert_eq!(*res, 999),
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_ => unreachable!(),
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}
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}
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}
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@ -29,7 +29,7 @@
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//!
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#![deny(clippy::pedantic)]
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#![allow(clippy::module_name_repetitions)]
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#![deny(missing_docs)]
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#![warn(missing_docs)]
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pub mod core;
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mod error;
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