Initial commit

src-tauri/bounded_macro/Cargo.lock

@@ -0,0 +1,46 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "bounded_macro"
+version = "0.1.0"
+dependencies = [
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.106"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8fd00f0bb2e90d81d1044c2b32617f68fcb9fa3bb7640c23e9c748e53fb30934"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dfbc457d0c7a0759a614551b11a6409e5951f6c7537be1f1b7682b9ae9230368"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "syn"
+version = "2.0.118"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b9ae57f904213ebb649ce6895b8a66c66f0203b9319718f69a5612a065b1422"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"

src-tauri/bounded_macro/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "bounded_macro"
+version = "0.1.0"
+edition = "2024"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+quote = "1.0.46"
+syn = { version = "2.0.118", features = ["full"] }

src-tauri/bounded_macro/src/lib.rs

@@ -0,0 +1,81 @@
+use proc_macro::TokenStream;
+
+#[proc_macro_attribute]
+pub fn bounded_macro(attr: TokenStream, item: TokenStream) -> TokenStream {
+    let ast: (syn::MetaList, syn::ItemImpl) = (
+        syn::parse(attr).expect("Attr"),
+        syn::parse(item).expect("Item"),
+    );
+    impl_bounded_macro(&ast.0, &ast.1)
+}
+
+fn impl_bounded_macro(attr: &syn::MetaList, item: &syn::ItemImpl) -> TokenStream {
+    let picked_max = item.items.iter()
+        .map_while(|x| {
+            if let syn::ImplItem::Const(x) = x {
+                return Some(x);
+            }
+            None
+        })
+        .find(|x| {
+            x.attrs.iter().any(|x| {
+                x.meta.require_path_only().map_or(false,  |x| {
+                    x.get_ident().map_or(false, |x| {
+                        x == "max"
+                    })
+                })
+            })
+        }).expect("");
+    let picked_min = item.items.iter()
+        .map_while(|x| {
+            if let syn::ImplItem::Const(x) = x {
+                return Some(x);
+            }
+            None
+        })
+        .find(|x| {
+            x.attrs.iter().any(|x| {
+                x.meta.require_path_only().map_or(false,  |x| {
+                    x.get_ident().map_or(false, |x| {
+                        x == "min"
+                    })
+                })
+            })
+        }).expect("");
+
+    let syn::Expr::Lit(max) = &picked_max.expr else {
+        panic!()
+    };
+    let syn::Expr::Lit(min) = &picked_min.expr else {
+        panic!()
+    };
+    let name = match item.self_ty.as_ref() {
+        syn::Type::Path(p) => p,
+        _ => panic!()
+    };
+    quote::quote! {
+        impl Add<Self> for #name {
+            type Output = Self;
+
+            fn add(self, rhs: Self) -> Self {
+                Self {
+                    degree: clip_range(self.degree + rhs.degree, #max, #min),
+                    minute: self.minute + rhs.minute,
+                    second: self.second + rhs.second,
+                }
+            }
+        }
+
+        impl Mul<i64> for #name {
+            type Output = Self;
+
+            fn mul(self, rhs: i64) -> Self {
+                Self {
+                    degree: clip_range(rhs * self.degree, Self::DEGREE_MAX, Self::DEGREE_MIN),
+                    minute: clip_range(rhs * self.minute, Self::MINUTE_MAX, Self::MINUTE_MIN),
+                    second: clip_range(rhs * self.second, Self::SECOND_MAX, Self::SECOND_MIN),
+                }
+            }
+        }
+    }.into()
+}