Initial implementation of the Graph type in rust, construction functions only

rust/.envrc

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+use flake

rust/.gitignore

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+target/

rust/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "bitmaps"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "031043d04099746d8db04daf1fa424b2bc8bd69d92b25962dcde24da39ab64a2"
+dependencies = [
+ "typenum",
+]
+
+[[package]]
+name = "ginger"
+version = "0.1.0"
+dependencies = [
+ "im-rc",
+]
+
+[[package]]
+name = "im-rc"
+version = "15.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "af1955a75fa080c677d3972822ec4bad316169ab1cfc6c257a942c2265dbe5fe"
+dependencies = [
+ "bitmaps",
+ "rand_core",
+ "rand_xoshiro",
+ "sized-chunks",
+ "typenum",
+ "version_check",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+
+[[package]]
+name = "rand_xoshiro"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f97cdb2a36ed4183de61b2f824cc45c9f1037f28afe0a322e9fff4c108b5aaa"
+dependencies = [
+ "rand_core",
+]
+
+[[package]]
+name = "sized-chunks"
+version = "0.6.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "16d69225bde7a69b235da73377861095455d298f2b970996eec25ddbb42b3d1e"
+dependencies = [
+ "bitmaps",
+ "typenum",
+]
+
+[[package]]
+name = "typenum"
+version = "1.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "497961ef93d974e23eb6f433eb5fe1b7930b659f06d12dec6fc44a8f554c0bba"
+
+[[package]]
+name = "version_check"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"

rust/Cargo.toml

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+[package]
+name = "ginger"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+im-rc = "15.1.0"

rust/flake.lock

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+{
+  "nodes": {
+    "naersk": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1671096816,
+        "narHash": "sha256-ezQCsNgmpUHdZANDCILm3RvtO1xH8uujk/+EqNvzIOg=",
+        "owner": "nix-community",
+        "repo": "naersk",
+        "rev": "d998160d6a076cfe8f9741e56aeec7e267e3e114",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "ref": "master",
+        "repo": "naersk",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1671788672,
+        "narHash": "sha256-tLkPxJuos3jki2f/TZdHn+NuMQAzN9s2E4QudylQLg0=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "2c74fcd6c5fc14a61de158fb796243543f46b217",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1671788672,
+        "narHash": "sha256-tLkPxJuos3jki2f/TZdHn+NuMQAzN9s2E4QudylQLg0=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "2c74fcd6c5fc14a61de158fb796243543f46b217",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "naersk": "naersk",
+        "nixpkgs": "nixpkgs_2",
+        "utils": "utils"
+      }
+    },
+    "utils": {
+      "locked": {
+        "lastModified": 1667395993,
+        "narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

rust/flake.nix

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+{
+  inputs = {
+    naersk.url = "github:nix-community/naersk/master";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, utils, naersk }:
+    utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+        naersk-lib = pkgs.callPackage naersk { };
+      in
+      {
+        defaultPackage = naersk-lib.buildPackage ./.;
+        devShell = with pkgs; mkShell {
+          buildInputs = [ cargo rustc rustfmt pre-commit rustPackages.clippy ];
+          RUST_SRC_PATH = rustPlatform.rustLibSrc;
+        };
+      });
+}

rust/src/graph.rs

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+use std::hash::Hash;
+use im_rc::{HashMap,HashSet};
+
+#[derive(Clone, Eq, Hash, PartialEq, Debug)]
+pub enum OpenEdgeSource<E, V>{
+    Value(V),
+    Tuple(Vec<OpenEdge<E, V>>),
+}
+
+#[derive(Clone, Eq, Hash, PartialEq, Debug)]
+pub struct OpenEdge<E, V>{
+    value: E,
+    source: OpenEdgeSource<E, V>,
+}
+
+#[derive(Clone, Eq, Hash, PartialEq, Debug)]
+pub struct Graph<E, V>
+where
+    E: Hash + Eq + Clone,
+    V: Hash + Eq + Clone,
+{
+    roots: HashMap<V, HashSet<OpenEdge<E, V>>>,
+}
+
+impl<E, V> Graph<E, V>
+where
+    E: Hash + Eq + Clone,
+    V: Hash + Eq + Clone,
+{
+
+    pub fn new() -> Graph<E, V> {
+        Graph{roots: HashMap::new()}
+    }
+
+    pub fn from_value(edge_value: E, source_value: V) -> OpenEdge<E, V> {
+        OpenEdge{
+            value: edge_value,
+            source: OpenEdgeSource::Value(source_value),
+        }
+    }
+
+    pub fn from_tuple(edge_value: E, source_tuple: Vec<OpenEdge<E, V>>) -> OpenEdge<E, V> {
+        OpenEdge{
+            value: edge_value,
+            source: OpenEdgeSource::Tuple(source_tuple),
+        }
+    }
+
+    pub fn with(&self, root_value: V, open_edge: OpenEdge<E, V>) -> Self {
+
+        let new_roots = self.roots.alter(
+            |set_option: Option<HashSet<OpenEdge<E, V>>>| -> Option<HashSet<OpenEdge<E, V>>> {
+                match set_option {
+                    None => Some(HashSet::unit(open_edge)),
+                    Some(set) => Some(set.update(open_edge)),
+                }
+            },
+            root_value,
+        );
+
+        Graph{
+            roots: new_roots,
+        }
+    }
+}
+

rust/src/lib.rs

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+mod graph;
+
+pub use graph::Graph;

rust/src/main.rs

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+use ginger::Graph;
+
+fn main() {
+
+    let g = Graph::new().
+        with("foo", Graph::from_value(1, "bar"));
+
+    let g1 = g.
+        with("foo", Graph::from_value(1, "bar")).
+        with("foo", Graph::from_value(2, "baz"));
+
+    let g2 = g.
+        with("bar", Graph::from_tuple(100, vec![
+            Graph::from_value(20, "a"),
+            Graph::from_value(40, "b"),
+            Graph::from_value(60, "c"),
+        ]));
+
+    dbg!(g1 == g2);
+    dbg!(&g1);
+    dbg!(&g2);
+}