initial

.gitignore

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+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "gust"
+version = "0.1.0"

Cargo.toml

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+[package]
+name = "gust"
+version = "0.1.0"
+authors = ["Michael Zhang <mail@mzhang.io>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

src/ast.rs

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+use std::collections::HashMap;
+
+#[derive(Debug, Hash, PartialEq, Eq)]
+pub struct Id(pub u32);
+
+#[derive(Debug)]
+pub enum Decl {
+    Iface(Iface),
+    Impl(Impl),
+    Struct(Struct),
+    Enum(Enum),
+    Func(Func),
+}
+
+#[derive(Debug)]
+pub struct Iface {
+
+}
+
+#[derive(Debug)]
+pub struct Impl {
+
+}
+
+#[derive(Debug)]
+pub struct Struct {
+
+}
+
+#[derive(Debug)]
+pub struct Enum {
+
+}
+
+#[derive(Debug)]
+pub struct Func {
+
+}
+
+#[derive(Debug)]
+pub enum Expr {
+
+}
+
+#[derive(Default, Debug)]
+pub struct TypeChecker<'a> {
+    gen: u32,
+    enums: HashMap<u32, &'a Enum>,
+    funcs: HashMap<u32, &'a Func>,
+}
+
+impl<'a> TypeChecker<'a> {
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    fn new_id(&mut self) -> u32 {
+        let id = self.gen;
+        self.gen += 1;
+        id
+    }
+
+    pub fn process(&mut self, decls: &'a [Decl]) {
+        for decl in decls.iter() {
+            match decl {
+                Decl::Enum(v) => {
+                    let id = self.new_id();
+                    self.enums.insert(id, v);
+                }
+                Decl::Func(v) => {
+                    let id = self.new_id();
+                    self.funcs.insert(id, v);
+                }
+                _ => {}
+            }
+        }
+
+        println!("self: {:?}", self);
+    }
+}

src/hir.rs

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+

src/main.rs

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+mod ast;
+mod hir;
+
+fn main() {
+    let ast = vec![
+        ast::Decl::Enum(ast::Enum {  }),
+    ];
+
+    let mut tc = ast::TypeChecker::new();
+    tc.process(&ast);
+
+    println!("Hello, world!");
+}