Fix in Predicate trait and build file

.gitignore

@@ -1,2 +1,3 @@
 /.idea
-/target
+/target/*
+/Cargo.lock

Cargo.toml

@@ -1,8 +1,5 @@
 [package]
-name = "untitled"
-version = "0.1.0"
+name = "source_stream_0"
 edition = "2024"
 
-[dependencies]
-
 [lib]

src/lib.rs

@@ -4,7 +4,7 @@ pub trait Predicate<C> {
     fn check(&mut self, chr: C) -> bool;
 }
 
-impl<C> Predicate<C> for fn(C) -> bool {
+impl<C, F: FnMut(C) -> bool> Predicate<C> for F {
     fn check(&mut self, chr: C) -> bool {
         return self(chr);
     }
@@ -30,15 +30,4 @@ pub trait SourceStream<C, P: Pos, CS: CollectedSubstring<C>> {
 
     fn pos(&mut self) -> P;
     fn currentChar(&mut self) -> C;
-}
-
-//
-// fn sandbox<P: Pos, CS: CollectedSubstring<char>>(ctx: &mut impl SourceStream<char, P, CS>) {
-//     let x = "1324";
-//     let y = ['a'];
-//     ctx.collect(|c: &char| -> bool {
-//         return true;
-//     }).compareKeyword(&y);
-//
-//     return;
-// }
+}