Cargo.lock

@@ -66,12 +66,22 @@ dependencies = [
  "eval",
  "ir",
  "owo-colors",
+ "prowocessing",
  "ron",
  "serde",
  "serde_json",
  "time",
 ]
 
+[[package]]
+name = "approx"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cab112f0a86d568ea0e627cc1d6be74a1e9cd55214684db5561995f6dad897c6"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "ariadne"
 version = "0.4.0"
@@ -293,6 +303,12 @@ dependencies = [
  "zune-inflate",
 ]
 
+[[package]]
+name = "fast-srgb8"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd2e7510819d6fbf51a5545c8f922716ecfb14df168a3242f7d33e0239efe6a1"
+
 [[package]]
 name = "fdeflate"
 version = "0.3.3"
@@ -359,9 +375,9 @@ checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
 [[package]]
 name = "image"
-version = "0.24.7"
+version = "0.24.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f3dfdbdd72063086ff443e297b61695500514b1e41095b6fb9a5ab48a70a711"
+checksum = "034bbe799d1909622a74d1193aa50147769440040ff36cb2baa947609b0a4e23"
 dependencies = [
  "bytemuck",
  "byteorder",
@@ -369,7 +385,6 @@ dependencies = [
  "exr",
  "gif",
  "jpeg-decoder",
- "num-rational",
  "num-traits",
  "png",
  "qoi",
@@ -443,27 +458,6 @@ dependencies = [
  "simd-adler32",
 ]
 
-[[package]]
-name = "num-integer"
-version = "0.1.45"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "225d3389fb3509a24c93f5c29eb6bde2586b98d9f016636dff58d7c6f7569cd9"
-dependencies = [
- "autocfg",
- "num-traits",
-]
-
-[[package]]
-name = "num-rational"
-version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0638a1c9d0a3c0914158145bc76cff373a75a627e6ecbfb71cbe6f453a5a19b0"
-dependencies = [
- "autocfg",
- "num-integer",
- "num-traits",
-]
-
 [[package]]
 name = "num-traits"
 version = "0.2.17"
@@ -494,6 +488,71 @@ version = "4.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "caff54706df99d2a78a5a4e3455ff45448d81ef1bb63c22cd14052ca0e993a3f"
 
+[[package]]
+name = "palette"
+version = "0.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d38e6e5ca1612e2081cc31188f08c3cba630ce4ba44709a153f1a0f38d678f2"
+dependencies = [
+ "approx",
+ "fast-srgb8",
+ "palette_derive",
+ "phf",
+]
+
+[[package]]
+name = "palette_derive"
+version = "0.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e05d1c929301fee6830dafa764341118829b2535c216b0571e3821ecac5c885b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "phf"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ade2d8b8f33c7333b51bcf0428d37e217e9f32192ae4772156f65063b8ce03dc"
+dependencies = [
+ "phf_macros",
+ "phf_shared",
+]
+
+[[package]]
+name = "phf_generator"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "48e4cc64c2ad9ebe670cb8fd69dd50ae301650392e81c05f9bfcb2d5bdbc24b0"
+dependencies = [
+ "phf_shared",
+ "rand",
+]
+
+[[package]]
+name = "phf_macros"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3444646e286606587e49f3bcf1679b8cef1dc2c5ecc29ddacaffc305180d464b"
+dependencies = [
+ "phf_generator",
+ "phf_shared",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "phf_shared"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "90fcb95eef784c2ac79119d1dd819e162b5da872ce6f3c3abe1e8ca1c082f72b"
+dependencies = [
+ "siphasher",
+]
+
 [[package]]
 name = "png"
 version = "0.17.10"
@@ -522,6 +581,14 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "prowocessing"
+version = "0.1.0"
+dependencies = [
+ "image",
+ "palette",
+]
+
 [[package]]
 name = "qoi"
 version = "0.4.1"
@@ -540,6 +607,21 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "rand"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
+dependencies = [
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+
 [[package]]
 name = "rayon"
 version = "1.8.0"
@@ -641,6 +723,12 @@ version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d66dc143e6b11c1eddc06d5c423cfc97062865baf299914ab64caa38182078fe"
 
+[[package]]
+name = "siphasher"
+version = "0.3.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38b58827f4464d87d377d175e90bf58eb00fd8716ff0a62f80356b5e61555d0d"
+
 [[package]]
 name = "smallvec"
 version = "1.11.2"

Cargo.toml

@@ -2,7 +2,8 @@
 members = [
   "crates/app",
   "crates/eval",
-  "crates/ir",
+  "crates/ir", 
+  "crates/prowocessing",
 ]
 resolver = "2"
 

crates/app/Cargo.toml

@@ -11,6 +11,7 @@ clap = { workspace = true, features = [ "derive", "env" ] }
 dirs = "5"
 eval = { path = "../eval" }
 ir = { path = "../ir" }
+prowocessing = { path = "../prowocessing"}
 owo-colors = "4"
 ron = "0.8"
 serde = { workspace = true, features = [ "derive" ] }

crates/app/src/config.rs

@@ -1,18 +1,11 @@
-use std::path::PathBuf;
+use self::config_file::{find_config_file, Configs};
-
+pub(crate) use cli::CliConfigs;
-use clap::Parser;
-
-use self::{
-    cli::Args,
-    config_file::{find_config_file, Configs},
-};
 
 mod cli;
 mod config_file;
 
 /// this struct may hold all configuration
 pub struct Config {
-    pub source: PathBuf,
     pub evaluator: eval::Available,
 
     pub startup_msg: bool,
@@ -20,13 +13,17 @@ pub struct Config {
 
 impl Config {
     /// Get the configs from all possible places (args, file, env...)
-    pub fn read() -> Self {
+    pub fn read(args: &CliConfigs) -> Self {
-        let args = Args::parse();
+        // let config = if let Some(config) = &args.config_path {
-        let config = if let Some(config) = args.config_path {
+        //     Ok(config.clone())
-            Ok(config)
+        // } else {
-        } else {
+        //     find_config_file()
-            find_config_file()
+        // };
-        };
+        let config = args
+            .config_path
+            .clone()
+            .ok_or(())
+            .or_else(|()| find_config_file());
 
         // try to read a maybe existing config file
         let config = config.ok().and_then(|path| {
@@ -42,7 +39,6 @@ impl Config {
 
         if let Some(file) = config {
             Self {
-                source: args.source,
                 evaluator: args.evaluator.and(file.evaluator).unwrap_or_default(),
                 // this is negated because to an outward api, the negative is more intuitive,
                 // while in the source the other way around is more intuitive
@@ -50,7 +46,6 @@ impl Config {
             }
         } else {
             Self {
-                source: args.source,
                 startup_msg: !args.no_startup_message,
                 evaluator: args.evaluator.unwrap_or_default(),
             }

crates/app/src/config/cli.rs

@@ -1,12 +1,9 @@
 use std::path::PathBuf;
 
-use clap::{builder::BoolishValueParser, ArgAction, Parser};
+use clap::{builder::BoolishValueParser, ArgAction, Args};
-
-#[derive(Parser)]
-pub(crate) struct Args {
-    /// What file contains the pipeline to evaluate.
-    pub source: PathBuf,
 
+#[derive(Args)]
+pub(crate) struct CliConfigs {
     /// How to actually run the pipeline.
     /// Overrides the config file. Defaults to the debug evaluator.
     #[arg(short, long)]

crates/app/src/main.rs

@@ -1,6 +1,8 @@
-use std::fs;
+use std::{fs, path::PathBuf};
 
-use config::Config;
+use clap::{Parser, Subcommand};
+use config::{CliConfigs, Config};
+use dev::DevCommands;
 use welcome_msg::print_startup_msg;
 
 mod config;
@@ -9,19 +11,60 @@ mod config;
 mod error_reporting;
 mod welcome_msg;
 
+#[derive(Parser)]
+struct Args {
+    #[command(flatten)]
+    configs: CliConfigs,
+    #[command(subcommand)]
+    command: Commands,
+}
+
+#[derive(Subcommand)]
+enum Commands {
+    Run {
+        /// What file contains the pipeline to evaluate.
+        source: PathBuf,
+    },
+    Dev {
+        #[command(subcommand)]
+        command: DevCommands,
+    },
+}
+
 fn main() {
     // TODO: proper error handling across the whole function
     //       don't forget to also look inside `Config`
-    let cfg = Config::read();
+    let args = Args::parse();
+    let cfg = Config::read(&args.configs);
 
     if cfg.startup_msg {
         print_startup_msg();
     }
 
-    let source = fs::read_to_string(cfg.source).expect("can't find source file");
+    match args.command {
-    let ir = ir::from_ron(&source).expect("failed to parse source to graph ir");
+        Commands::Run { source } => {
+            let source = fs::read_to_string(source).expect("can't find source file");
+            let ir = ir::from_ron(&source).expect("failed to parse source to graph ir");
 
-    let mut machine = cfg.evaluator.pick();
+            let mut machine = cfg.evaluator.pick();
-    machine.feed(ir);
+            machine.feed(ir);
-    machine.eval_full();
+            machine.eval_full();
+        }
+        Commands::Dev {
+            command: dev_command,
+        } => dev_command.run(),
+    }
+}
+
+mod dev {
+    use clap::Subcommand;
+
+    #[derive(Subcommand)]
+    pub(crate) enum DevCommands {}
+
+    impl DevCommands {
+        pub fn run(self) {
+            println!("There are currently no dev commands.");
+        }
+    }
 }

crates/eval/src/lib.rs

@@ -37,7 +37,7 @@ impl Available {
     #[must_use]
     pub fn pick(&self) -> Box<dyn Evaluator> {
         match self {
-            Self::Debug => Box::new(kind::debug::Evaluator::default()),
+            Self::Debug => Box::<kind::debug::Evaluator>::default(),
         }
     }
 }

crates/prowocessing/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "prowocessing"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+image = "0.24.8"
+palette = "0.7.4"
+
+[lints]
+workspace = true

crates/prowocessing/src/experimental.rs

@@ -0,0 +1,2 @@
+pub mod enum_based;
+pub mod trait_based;

crates/prowocessing/src/experimental/enum_based.rs

@@ -0,0 +1,64 @@
+pub enum Instruction {
+    Uppercase,
+    Lowercase,
+}
+
+pub struct Pipeline {
+    pipeline: Vec<fn(String) -> String>,
+}
+
+impl Pipeline {
+    pub fn run(&self, val: String) -> String {
+        let mut current = val;
+
+        for instr in &self.pipeline {
+            current = instr(current);
+        }
+
+        current
+    }
+}
+
+pub struct PipelineBuilder {
+    pipeline: Vec<Instruction>,
+}
+
+impl PipelineBuilder {
+    pub fn new() -> Self {
+        Self {
+            pipeline: Vec::new(),
+        }
+    }
+
+    #[must_use]
+    pub fn insert(mut self, instr: Instruction) -> Self {
+        self.pipeline.push(instr);
+        self
+    }
+
+    pub fn build(&self) -> Pipeline {
+        fn uppercase(v: String) -> String {
+            str::to_uppercase(&v)
+        }
+        fn lowercase(v: String) -> String {
+            str::to_lowercase(&v)
+        }
+
+        let mut res = Vec::new();
+
+        for item in &self.pipeline {
+            res.push(match item {
+                Instruction::Uppercase => uppercase,
+                Instruction::Lowercase => lowercase,
+            });
+        }
+
+        Pipeline { pipeline: res }
+    }
+}
+
+impl Default for PipelineBuilder {
+    fn default() -> Self {
+        Self::new()
+    }
+}

crates/prowocessing/src/experimental/trait_based.rs

@@ -0,0 +1,11 @@
+//! An experiment for a hyper-modular trait-based architecture.
+//!
+//! Patterns defining this (or well, which I reference a lot while writing this):
+//! - [Command pattern using trait objects](https://rust-unofficial.github.io/patterns/patterns/behavioural/command.html)
+//! - [Builder pattern](https://rust-unofficial.github.io/patterns/patterns/creational/builder.html)
+
+pub mod data;
+#[macro_use]
+pub mod element;
+pub mod ops;
+pub mod pipeline;

crates/prowocessing/src/experimental/trait_based/data.rs

@@ -0,0 +1,5 @@
+//! Definitions of the data transfer and storage types.
+
+pub mod io;
+
+pub mod raw;

crates/prowocessing/src/experimental/trait_based/data/io.rs

@@ -0,0 +1,53 @@
+//! Types for element and pipeline IO
+
+use std::{borrow::ToOwned, convert::Into};
+
+use super::raw::Data;
+
+/// Newtype struct with borrowed types for pipeline/element inputs, so that doesn't force a move or clone
+#[derive(PartialEq, Eq, Debug)]
+pub struct Inputs<'a>(pub Vec<&'a Data>);
+
+impl<'a> From<Vec<&'a Data>> for Inputs<'a> {
+    fn from(value: Vec<&'a Data>) -> Self {
+        Self(value)
+    }
+}
+
+impl<'a, T: Into<&'a Data>> From<T> for Inputs<'a> {
+    fn from(value: T) -> Self {
+        Self(vec![value.into()])
+    }
+}
+
+impl<'a> From<&'a Outputs> for Inputs<'a> {
+    fn from(value: &'a Outputs) -> Self {
+        Self(value.0.iter().map(Into::into).collect())
+    }
+}
+
+/// Used for pipeline/element outputs
+#[derive(PartialEq, Eq, Debug)]
+pub struct Outputs(pub Vec<Data>);
+
+impl Outputs {
+    /// consume self and return inner value(s)
+    pub fn into_inner(self) -> Vec<Data> {
+        self.0
+    }
+}
+impl From<Vec<Data>> for Outputs {
+    fn from(value: Vec<Data>) -> Self {
+        Self(value)
+    }
+}
+impl<T: Into<Data>> From<T> for Outputs {
+    fn from(value: T) -> Self {
+        Self(vec![value.into()])
+    }
+}
+impl From<Inputs<'_>> for Outputs {
+    fn from(value: Inputs) -> Self {
+        Self(value.0.into_iter().map(ToOwned::to_owned).collect())
+    }
+}

crates/prowocessing/src/experimental/trait_based/data/raw.rs

@@ -0,0 +1,20 @@
+//! Dynamic data storage and transfer types for use in [`io`]
+
+// Dynamic data type
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum Data {
+    String(String),
+    Int(i32),
+}
+
+impl From<String> for Data {
+    fn from(value: String) -> Self {
+        Self::String(value)
+    }
+}
+
+impl From<i32> for Data {
+    fn from(value: i32) -> Self {
+        Self::Int(value)
+    }
+}

crates/prowocessing/src/experimental/trait_based/element.rs

@@ -0,0 +1,29 @@
+//! The trait and type representations
+
+use std::any::TypeId;
+
+use crate::experimental::trait_based::data::io::Inputs;
+
+use super::data::io::Outputs;
+
+pub(crate) trait PipelineElement {
+    /// return a static runner function pointer to avoid dynamic dispatch during pipeline execution - Types MUST match the signature
+    fn runner(&self) -> fn(&Inputs) -> Outputs;
+    /// return the signature of the element
+    fn signature(&self) -> ElementSignature;
+}
+
+/// Type signature for an element used for static checking
+pub(crate) struct ElementSignature {
+    pub inputs: Vec<TypeId>,
+    pub outputs: Vec<TypeId>,
+}
+
+macro_rules! signature {
+    ($($inputs:ty),+ => $($outputs:ty),+) => (
+        ElementSignature {
+            inputs: vec![$(std::any::TypeId::of::<$inputs>(), )+],
+            outputs: vec![$(std::any::TypeId::of::<$outputs>(), )+]
+        }
+    )
+}

crates/prowocessing/src/experimental/trait_based/ops.rs

@@ -0,0 +1,7 @@
+mod num;
+mod str;
+
+pub mod prelude {
+    pub(crate) use super::num::*;
+    pub(crate) use super::str::*;
+}

crates/prowocessing/src/experimental/trait_based/ops/num.rs

@@ -0,0 +1,62 @@
+//! Operations on numeric data
+use core::panic;
+use std::any::TypeId;
+
+use crate::experimental::trait_based::{
+    data::{
+        io::{Inputs, Outputs},
+        raw::Data,
+    },
+    element::{ElementSignature, PipelineElement},
+};
+
+/// Addition
+pub struct Add(pub i32);
+impl PipelineElement for Add {
+    fn runner(&self) -> fn(&Inputs) -> Outputs {
+        |input| {
+            let [Data::Int(i0), Data::Int(i1), ..] = input.0[..] else {
+                panic!("Invalid data passed")
+            };
+            (i0 + i1).into()
+        }
+    }
+
+    fn signature(&self) -> ElementSignature {
+        signature!(i32, i32 => i32)
+    }
+}
+
+/// Subtraction
+pub struct Subtract(pub i32);
+impl PipelineElement for Subtract {
+    fn runner(&self) -> fn(&Inputs) -> Outputs {
+        |input| {
+            let [Data::Int(i0), Data::Int(i1), ..] = input.0[..] else {
+                panic!("Invalid data passed")
+            };
+            (i0 + i1).into()
+        }
+    }
+
+    fn signature(&self) -> ElementSignature {
+        signature!(i32, i32 => i32)
+    }
+}
+
+/// Turn input to string
+pub struct Stringify;
+impl PipelineElement for Stringify {
+    fn runner(&self) -> fn(&Inputs) -> Outputs {
+        |input| {
+            let [Data::Int(int), ..] = input.0[..] else {
+                panic!("Invalid data passed")
+            };
+            int.to_string().into()
+        }
+    }
+
+    fn signature(&self) -> ElementSignature {
+        signature!(i32 => String)
+    }
+}

crates/prowocessing/src/experimental/trait_based/ops/str.rs

@@ -0,0 +1,59 @@
+//! Operation on String/text data
+use crate::experimental::trait_based::{
+    data::{
+        io::{Inputs, Outputs},
+        raw::Data,
+    },
+    element::{ElementSignature, PipelineElement},
+};
+
+/// Concatenate the inputs
+pub struct Concatenate(pub String);
+impl PipelineElement for Concatenate {
+    fn runner(&self) -> fn(&Inputs) -> Outputs {
+        |input| {
+            let [Data::String(s0), Data::String(s1), ..] = input.0[..] else {
+                panic!("Invalid data passed")
+            };
+            format!("{s0}{s1}").into()
+        }
+    }
+
+    fn signature(&self) -> ElementSignature {
+        signature!(String, String => String)
+    }
+}
+
+/// Turn input text to uppercase
+pub struct Upper;
+impl PipelineElement for Upper {
+    fn runner(&self) -> fn(&Inputs) -> Outputs {
+        |input| {
+            let [Data::String(s), ..] = input.0[..] else {
+                panic!("Invalid data passed")
+            };
+            s.to_uppercase().into()
+        }
+    }
+
+    fn signature(&self) -> ElementSignature {
+        signature!(String => String)
+    }
+}
+
+/// Turn input text to lowercase
+pub struct Lower;
+impl PipelineElement for Lower {
+    fn runner(&self) -> fn(&Inputs) -> Outputs {
+        |input| {
+            let [Data::String(s), ..] = input.0[..] else {
+                panic!("Invalid data passed")
+            };
+            s.to_lowercase().into()
+        }
+    }
+
+    fn signature(&self) -> ElementSignature {
+        signature!(String => String)
+    }
+}

crates/prowocessing/src/experimental/trait_based/pipeline.rs

@@ -0,0 +1,107 @@
+use super::data::io::{Inputs, Outputs};
+use super::element::PipelineElement;
+use super::ops::prelude::*;
+
+/// Builder for the pipelines that are actually run
+///
+/// TODO:
+/// - Bind additional inputs if instruction has more then one and is passd without any additional
+/// - allow binding to pointers to other pipelines?
+/// - allow referencing earlier data
+pub struct PipelineBuilder {
+    elements: Vec<Box<dyn PipelineElement>>,
+}
+
+impl PipelineBuilder {
+    /// Create new, empty builder
+    pub fn new() -> Self {
+        Self {
+            elements: Vec::new(),
+        }
+    }
+
+    /// Insert element into pipeline
+    fn insert<T: PipelineElement + 'static>(mut self, el: T) -> Self {
+        if let Some(previous_item) = self.elements.last() {
+            assert_eq!(
+                previous_item.signature().outputs[0],
+                el.signature().inputs[0]
+            );
+        }
+        self.elements.push(Box::new(el));
+        self
+    }
+
+    /// insert string concatenattion element
+    #[must_use]
+    pub fn concatenate(self, sec: String) -> Self {
+        self.insert(Concatenate(sec))
+    }
+
+    /// insert string uppercase element
+    #[must_use]
+    pub fn upper(self) -> Self {
+        self.insert(Upper)
+    }
+
+    /// insert string lowercase element
+    #[must_use]
+    pub fn lower(self) -> Self {
+        self.insert(Lower)
+    }
+
+    /// insert numeric addition element
+    #[must_use]
+    #[allow(
+        clippy::should_implement_trait,
+        reason = "is not equivalent to addition"
+    )]
+    pub fn add(self, sec: i32) -> Self {
+        self.insert(Add(sec))
+    }
+
+    /// insert numeric subtraction element
+    #[must_use]
+    pub fn subtract(self, sec: i32) -> Self {
+        self.insert(Subtract(sec))
+    }
+
+    /// insert stringify element
+    #[must_use]
+    pub fn stringify(self) -> Self {
+        self.insert(Stringify)
+    }
+
+    /// Build the pipeline. Doesn't check again - `insert` should verify correctness.
+    pub fn build(&self) -> Pipeline {
+        let mut r = Vec::new();
+
+        self.elements.iter().for_each(|el| r.push(el.runner()));
+
+        Pipeline { runners: r }
+    }
+}
+
+impl Default for PipelineBuilder {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+/// Runnable pipeline - at the core of this library
+pub struct Pipeline {
+    runners: Vec<fn(&Inputs) -> Outputs>,
+}
+
+impl Pipeline {
+    /// run the pipeline
+    pub fn run(&self, inputs: Inputs) -> Outputs {
+        let mut out: Outputs = inputs.into();
+
+        for runner in &self.runners {
+            out = runner(&(&out).into());
+        }
+
+        out
+    }
+}

crates/prowocessing/src/lib.rs

@@ -0,0 +1,40 @@
+//! # This is the image processing library for iOwO
+//!
+//! One of the design goals for this library is, however, to be a simple, generic image processing library.
+//! For now, it's just indev... lets see what comes of it!
+#![feature(lint_reasons)]
+
+/// just some experiments, to test whether the architecture i want is even possible (or how to do it). probably temporary.
+/// Gonna first try string processing...
+pub mod experimental;
+
+#[cfg(test)]
+mod tests {
+    use crate::experimental::{
+        enum_based,
+        trait_based::{self, data::io::Outputs},
+    };
+
+    #[test]
+    fn test_enums() {
+        let builder = enum_based::PipelineBuilder::new().insert(enum_based::Instruction::Uppercase);
+        let upr = builder.build();
+        let upr_lowr = builder.insert(enum_based::Instruction::Lowercase).build();
+
+        assert_eq!(upr.run(String::from("Test")), String::from("TEST"));
+        assert_eq!(upr_lowr.run(String::from("Test")), String::from("test"));
+    }
+
+    #[test]
+    fn add() {
+        let pipe = trait_based::pipeline::PipelineBuilder::new()
+            .add(0)
+            .stringify()
+            .build();
+
+        assert_eq!(
+            pipe.run(vec![&2.into(), &3.into()].into()),
+            Outputs(vec![String::from("5").into()])
+        );
+    }
+}