Parsers/source-stream-0.rs
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Simplified _Keyword impls

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This commit is contained in:
Andrew Golovashevich 2025-11-09 13:29:58 +03:00
parent dd86157e7e
commit 525ba5d370
2 changed files with 30 additions and 28 deletions
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50
src/_keyword_impls.rs
View File

@ -1,63 +1,65 @@
use std::slice::Iter;
use std::str::Chars;
struct _StringIteratorImpl<'a> {
orig: Chars<'a>,
}
impl crate::_KeywordComparatorIterator<char> for _StringIteratorImpl<'_> {
fn consume(&mut self, e: &char) -> bool {
return self.orig.next().is_some_and(|a| a.eq(e));
impl crate::_KeywordComparatorIterator<char> for Chars<'_> {
fn consume(&mut self, e: char) -> bool {
return self.next().is_some_and(|a| a == e);
}
}
impl crate::_Keyword<char> for &str {
fn startComparation(&self, expectedLen: usize) -> Option<impl crate::_KeywordComparatorIterator<char>> {
fn startComparation(
&self,
expectedLen: usize,
) -> Option<impl crate::_KeywordComparatorIterator<char>> {
if (self.len() != expectedLen) {
return Option::None;
}
return Option::Some(_StringIteratorImpl { orig: self.chars() });
return Option::Some(self.chars());
}
}
impl crate::_Keyword<char> for &String {
fn startComparation(&self, expectedLen: usize) -> Option<impl crate::_KeywordComparatorIterator<char>> {
fn startComparation(
&self,
expectedLen: usize,
) -> Option<impl crate::_KeywordComparatorIterator<char>> {
if (self.len() != expectedLen) {
return Option::None;
}
return Option::Some(_StringIteratorImpl { orig: self.chars() });
return Option::Some(self.chars());
}
}
struct _ArrayIteratorImpl<'a, T> {
orig: Iter<'a, T>,
}
impl<T: PartialEq> crate::_KeywordComparatorIterator<T> for _ArrayIteratorImpl<'_, T> {
fn consume(&mut self, e: &T) -> bool {
return self.orig.next().is_some_and(|a| a == e);
impl<T: PartialEq> crate::_KeywordComparatorIterator<T> for Iter<'_, T> {
fn consume(&mut self, e: T) -> bool {
return self.next().is_some_and(|a| a.eq(&e));
}
}
impl<T: PartialEq> crate::_Keyword<T> for &[T] {
fn startComparation(&self, expectedLen: usize) -> Option<impl crate::_KeywordComparatorIterator<T>> {
fn startComparation(
&self,
expectedLen: usize,
) -> Option<impl crate::_KeywordComparatorIterator<T>> {
if (self.len() != expectedLen) {
return Option::None;
}
return Option::Some(_ArrayIteratorImpl { orig: self.iter() });
return Option::Some(self.iter());
}
}
impl<T: PartialEq, const SZ: usize> crate::_Keyword<T> for &[T; SZ] {
fn startComparation(&self, expectedLen: usize) -> Option<impl crate::_KeywordComparatorIterator<T>> {
fn startComparation(
&self,
expectedLen: usize,
) -> Option<impl crate::_KeywordComparatorIterator<T>> {
if (self.len() != expectedLen) {
return Option::None;
}
return Option::Some(_ArrayIteratorImpl { orig: self.iter() });
return Option::Some(self.iter());
}
}

8
src/lib.rs
View File

@ -1,11 +1,11 @@
mod _keyword_impls;
pub trait Predicate<C> {
fn check(&mut self, chr: &C) -> bool;
fn check(&mut self, chr: C) -> bool;
}
impl<C> Predicate<C> for fn(&C) -> bool {
fn check(&mut self, chr: &C) -> bool {
impl<C> Predicate<C> for fn(C) -> bool {
fn check(&mut self, chr: C) -> bool {
return self(chr);
}
}
@ -13,7 +13,7 @@ impl<C> Predicate<C> for fn(&C) -> bool {
pub trait Pos {}
pub trait _KeywordComparatorIterator<C> {
fn consume(&mut self, c: &C) -> bool;
fn consume(&mut self, c: C) -> bool;
}
pub trait _Keyword<C> {