shtola

commit 121a32e8f9e2359a129807b4d6b26f2f907d8fe3
Author: marisa <mokou@posteo.de>
Date:   Wed, 30 Oct 2019 20:54:29 +0100

Initial commit

Diffstat:
A
.editorconfig
 | 
12
++++++++++++
A
.gitignore
 | 
1
+
A
Cargo.lock
 | 
6
++++++
A
Cargo.toml
 | 
2
++
A
ware/Cargo.toml
 | 
7
+++++++
A
ware/src/lib.rs
 | 
79
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

6 files changed, 107 insertions(+), 0 deletions(-)
diff --git a/.editorconfig b/.editorconfig
@@ -0,0 +1,12 @@
+# EditorConfig is awesome: https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+indent_style = tab
+charset = utf-8
+tab_width = 2
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1 @@
+target/
diff --git a/Cargo.lock b/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ware"
+version = "0.1.0"
+
diff --git a/Cargo.toml b/Cargo.toml
@@ -0,0 +1,2 @@
+[workspace]
+members = ["ware"]
diff --git a/ware/Cargo.toml b/ware/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "ware"
+version = "0.1.0"
+authors = ["marisa <mokou@posteo.de>"]
+edition = "2018"
+
+[dependencies]
diff --git a/ware/src/lib.rs b/ware/src/lib.rs
@@ -0,0 +1,79 @@
+pub struct Ware<R> {
+	pub fns: Vec<Box<dyn Fn(R) -> R>>,
+}
+
+impl<R> Ware<R> {
+	pub fn new() -> Ware<R> {
+		let vec: Vec<Box<dyn Fn(R) -> R>> = Vec::new();
+		Ware { fns: vec }
+	}
+
+	pub fn wrap(&mut self, func: Box<dyn Fn(R) -> R>) {
+		self.fns.push(func);
+	}
+
+	pub fn run(&self, arg: R) -> R {
+		self.fns.iter().fold(arg, |acc, func| func(acc))
+	}
+}
+
+pub struct Ware2<R, S> {
+	pub fns: Vec<Box<dyn Fn(R, S) -> (R, S)>>,
+}
+
+impl<R, S> Ware2<R, S> {
+	pub fn new() -> Ware2<R, S> {
+		let vec: Vec<Box<dyn Fn(R, S) -> (R, S)>> = Vec::new();
+		Ware2 { fns: vec }
+	}
+
+	pub fn wrap(&mut self, func: Box<dyn Fn(R, S) -> (R, S)>) {
+		self.fns.push(func);
+	}
+
+	pub fn run (&self, arg1: R, arg2: S) -> (R, S) {
+		self.fns.iter().fold((arg1, arg2), |acc, func| func(acc.0, acc.1))
+	}
+}
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+
+	#[test]
+	fn it_works() {
+		let value = 1;
+		let mut w: Ware<i32> = Ware::new();
+		w.wrap(Box::new(|num| num + 1));
+		assert_eq!(w.run(value), 2);
+	}
+
+	#[test]
+	fn it_is_immutable() {
+		let value = 1;
+		let closure = |num| {
+			let num = num + 1;
+			num
+		};
+		let mut w: Ware<i32> = Ware::new();
+		w.wrap(Box::new(closure));
+		assert_eq!(w.run(value), 2);
+		assert_eq!(value, 1);
+	}
+
+	#[test]
+	fn ware2_works() {
+		let val1 = 2;
+		let val2 = "a".to_string();
+		let closure = |num: i32, st: String| {
+			let num = num - 1;
+			let mut string = String::new();
+			string.push_str(&st);
+			string.push('b');
+			(num, string)
+		};
+		let mut w: Ware2<i32, String> = Ware2::new();
+		w.wrap(Box::new(closure));
+		assert_eq!(w.run(val1, val2), (1, String::from("ab")));
+	}
+}