From 8cdb2b58d5764a59db85b3f76b1820f966c8423b Mon Sep 17 00:00:00 2001
From: koushiro <koushiro.cqx@gmail.com>
Date: Mon, 14 Feb 2022 17:00:15 +0800
Subject: [PATCH] sp-core: use paste macro to reduce boilerplate code

Signed-off-by: koushiro <koushiro.cqx@gmail.com>
---
 Cargo.lock                       |   1 +
 primitives/core/Cargo.toml       |   1 +
 primitives/core/src/u32_trait.rs | 566 ++-----------------------------
 3 files changed, 24 insertions(+), 544 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index feb721e6092cf..09bd0e17e7bbe 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -9647,6 +9647,7 @@ dependencies = [
  "parity-scale-codec",
  "parity-util-mem",
  "parking_lot 0.11.2",
+ "paste 1.0.6",
  "primitive-types",
  "rand 0.7.3",
  "regex",
diff --git a/primitives/core/Cargo.toml b/primitives/core/Cargo.toml
index bd41635a1d7a1..9dfe3ea355b1a 100644
--- a/primitives/core/Cargo.toml
+++ b/primitives/core/Cargo.toml
@@ -45,6 +45,7 @@ futures = { version = "0.3.1", optional = true }
 dyn-clonable = { version = "0.9.0", optional = true }
 thiserror = { version = "1.0.30", optional = true }
 bitflags = "1.3"
+paste = "1.0.6"
 
 # full crypto
 ed25519-dalek = { version = "1.0.1", default-features = false, features = ["u64_backend", "alloc"], optional = true }
diff --git a/primitives/core/src/u32_trait.rs b/primitives/core/src/u32_trait.rs
index ff15080400340..1397d672f0f28 100644
--- a/primitives/core/src/u32_trait.rs
+++ b/primitives/core/src/u32_trait.rs
@@ -23,548 +23,26 @@ pub trait Value {
 	const VALUE: u32;
 }
 
-/// Type representing the value 0 for the `Value` trait.
-pub struct _0;
-impl Value for _0 {
-	const VALUE: u32 = 0;
-}
-/// Type representing the value 1 for the `Value` trait.
-pub struct _1;
-impl Value for _1 {
-	const VALUE: u32 = 1;
-}
-/// Type representing the value 2 for the `Value` trait.
-pub struct _2;
-impl Value for _2 {
-	const VALUE: u32 = 2;
-}
-/// Type representing the value 3 for the `Value` trait.
-pub struct _3;
-impl Value for _3 {
-	const VALUE: u32 = 3;
-}
-/// Type representing the value 4 for the `Value` trait.
-pub struct _4;
-impl Value for _4 {
-	const VALUE: u32 = 4;
-}
-/// Type representing the value 5 for the `Value` trait.
-pub struct _5;
-impl Value for _5 {
-	const VALUE: u32 = 5;
-}
-/// Type representing the value 6 for the `Value` trait.
-pub struct _6;
-impl Value for _6 {
-	const VALUE: u32 = 6;
-}
-/// Type representing the value 7 for the `Value` trait.
-pub struct _7;
-impl Value for _7 {
-	const VALUE: u32 = 7;
-}
-/// Type representing the value 8 for the `Value` trait.
-pub struct _8;
-impl Value for _8 {
-	const VALUE: u32 = 8;
-}
-/// Type representing the value 9 for the `Value` trait.
-pub struct _9;
-impl Value for _9 {
-	const VALUE: u32 = 9;
-}
-/// Type representing the value 10 for the `Value` trait.
-pub struct _10;
-impl Value for _10 {
-	const VALUE: u32 = 10;
-}
-/// Type representing the value 11 for the `Value` trait.
-pub struct _11;
-impl Value for _11 {
-	const VALUE: u32 = 11;
-}
-/// Type representing the value 12 for the `Value` trait.
-pub struct _12;
-impl Value for _12 {
-	const VALUE: u32 = 12;
-}
-/// Type representing the value 13 for the `Value` trait.
-pub struct _13;
-impl Value for _13 {
-	const VALUE: u32 = 13;
-}
-/// Type representing the value 14 for the `Value` trait.
-pub struct _14;
-impl Value for _14 {
-	const VALUE: u32 = 14;
-}
-/// Type representing the value 15 for the `Value` trait.
-pub struct _15;
-impl Value for _15 {
-	const VALUE: u32 = 15;
-}
-/// Type representing the value 16 for the `Value` trait.
-pub struct _16;
-impl Value for _16 {
-	const VALUE: u32 = 16;
-}
-/// Type representing the value 17 for the `Value` trait.
-pub struct _17;
-impl Value for _17 {
-	const VALUE: u32 = 17;
-}
-/// Type representing the value 18 for the `Value` trait.
-pub struct _18;
-impl Value for _18 {
-	const VALUE: u32 = 18;
-}
-/// Type representing the value 19 for the `Value` trait.
-pub struct _19;
-impl Value for _19 {
-	const VALUE: u32 = 19;
-}
-/// Type representing the value 20 for the `Value` trait.
-pub struct _20;
-impl Value for _20 {
-	const VALUE: u32 = 20;
-}
-/// Type representing the value 21 for the `Value` trait.
-pub struct _21;
-impl Value for _21 {
-	const VALUE: u32 = 21;
-}
-/// Type representing the value 22 for the `Value` trait.
-pub struct _22;
-impl Value for _22 {
-	const VALUE: u32 = 22;
-}
-/// Type representing the value 23 for the `Value` trait.
-pub struct _23;
-impl Value for _23 {
-	const VALUE: u32 = 23;
-}
-/// Type representing the value 24 for the `Value` trait.
-pub struct _24;
-impl Value for _24 {
-	const VALUE: u32 = 24;
-}
-/// Type representing the value 25 for the `Value` trait.
-pub struct _25;
-impl Value for _25 {
-	const VALUE: u32 = 25;
-}
-/// Type representing the value 26 for the `Value` trait.
-pub struct _26;
-impl Value for _26 {
-	const VALUE: u32 = 26;
-}
-/// Type representing the value 27 for the `Value` trait.
-pub struct _27;
-impl Value for _27 {
-	const VALUE: u32 = 27;
-}
-/// Type representing the value 28 for the `Value` trait.
-pub struct _28;
-impl Value for _28 {
-	const VALUE: u32 = 28;
-}
-/// Type representing the value 29 for the `Value` trait.
-pub struct _29;
-impl Value for _29 {
-	const VALUE: u32 = 29;
-}
-/// Type representing the value 30 for the `Value` trait.
-pub struct _30;
-impl Value for _30 {
-	const VALUE: u32 = 30;
-}
-/// Type representing the value 31 for the `Value` trait.
-pub struct _31;
-impl Value for _31 {
-	const VALUE: u32 = 31;
-}
-/// Type representing the value 32 for the `Value` trait.
-pub struct _32;
-impl Value for _32 {
-	const VALUE: u32 = 32;
-}
-/// Type representing the value 33 for the `Value` trait.
-pub struct _33;
-impl Value for _33 {
-	const VALUE: u32 = 33;
-}
-/// Type representing the value 34 for the `Value` trait.
-pub struct _34;
-impl Value for _34 {
-	const VALUE: u32 = 34;
-}
-/// Type representing the value 35 for the `Value` trait.
-pub struct _35;
-impl Value for _35 {
-	const VALUE: u32 = 35;
-}
-/// Type representing the value 36 for the `Value` trait.
-pub struct _36;
-impl Value for _36 {
-	const VALUE: u32 = 36;
-}
-/// Type representing the value 37 for the `Value` trait.
-pub struct _37;
-impl Value for _37 {
-	const VALUE: u32 = 37;
-}
-/// Type representing the value 38 for the `Value` trait.
-pub struct _38;
-impl Value for _38 {
-	const VALUE: u32 = 38;
-}
-/// Type representing the value 39 for the `Value` trait.
-pub struct _39;
-impl Value for _39 {
-	const VALUE: u32 = 39;
-}
-/// Type representing the value 40 for the `Value` trait.
-pub struct _40;
-impl Value for _40 {
-	const VALUE: u32 = 40;
-}
-/// Type representing the value 41 for the `Value` trait.
-pub struct _41;
-impl Value for _41 {
-	const VALUE: u32 = 41;
-}
-/// Type representing the value 42 for the `Value` trait.
-pub struct _42;
-impl Value for _42 {
-	const VALUE: u32 = 42;
-}
-/// Type representing the value 43 for the `Value` trait.
-pub struct _43;
-impl Value for _43 {
-	const VALUE: u32 = 43;
-}
-/// Type representing the value 44 for the `Value` trait.
-pub struct _44;
-impl Value for _44 {
-	const VALUE: u32 = 44;
-}
-/// Type representing the value 45 for the `Value` trait.
-pub struct _45;
-impl Value for _45 {
-	const VALUE: u32 = 45;
-}
-/// Type representing the value 46 for the `Value` trait.
-pub struct _46;
-impl Value for _46 {
-	const VALUE: u32 = 46;
-}
-/// Type representing the value 47 for the `Value` trait.
-pub struct _47;
-impl Value for _47 {
-	const VALUE: u32 = 47;
-}
-/// Type representing the value 48 for the `Value` trait.
-pub struct _48;
-impl Value for _48 {
-	const VALUE: u32 = 48;
-}
-/// Type representing the value 49 for the `Value` trait.
-pub struct _49;
-impl Value for _49 {
-	const VALUE: u32 = 49;
-}
-/// Type representing the value 50 for the `Value` trait.
-pub struct _50;
-impl Value for _50 {
-	const VALUE: u32 = 50;
-}
-/// Type representing the value 51 for the `Value` trait.
-pub struct _51;
-impl Value for _51 {
-	const VALUE: u32 = 51;
-}
-/// Type representing the value 52 for the `Value` trait.
-pub struct _52;
-impl Value for _52 {
-	const VALUE: u32 = 52;
-}
-/// Type representing the value 53 for the `Value` trait.
-pub struct _53;
-impl Value for _53 {
-	const VALUE: u32 = 53;
-}
-/// Type representing the value 54 for the `Value` trait.
-pub struct _54;
-impl Value for _54 {
-	const VALUE: u32 = 54;
-}
-/// Type representing the value 55 for the `Value` trait.
-pub struct _55;
-impl Value for _55 {
-	const VALUE: u32 = 55;
-}
-/// Type representing the value 56 for the `Value` trait.
-pub struct _56;
-impl Value for _56 {
-	const VALUE: u32 = 56;
-}
-/// Type representing the value 57 for the `Value` trait.
-pub struct _57;
-impl Value for _57 {
-	const VALUE: u32 = 57;
-}
-/// Type representing the value 58 for the `Value` trait.
-pub struct _58;
-impl Value for _58 {
-	const VALUE: u32 = 58;
-}
-/// Type representing the value 59 for the `Value` trait.
-pub struct _59;
-impl Value for _59 {
-	const VALUE: u32 = 59;
-}
-/// Type representing the value 60 for the `Value` trait.
-pub struct _60;
-impl Value for _60 {
-	const VALUE: u32 = 60;
-}
-/// Type representing the value 61 for the `Value` trait.
-pub struct _61;
-impl Value for _61 {
-	const VALUE: u32 = 61;
-}
-/// Type representing the value 62 for the `Value` trait.
-pub struct _62;
-impl Value for _62 {
-	const VALUE: u32 = 62;
-}
-/// Type representing the value 63 for the `Value` trait.
-pub struct _63;
-impl Value for _63 {
-	const VALUE: u32 = 63;
-}
-/// Type representing the value 64 for the `Value` trait.
-pub struct _64;
-impl Value for _64 {
-	const VALUE: u32 = 64;
-}
-/// Type representing the value 65 for the `Value` trait.
-pub struct _65;
-impl Value for _65 {
-	const VALUE: u32 = 65;
-}
-/// Type representing the value 66 for the `Value` trait.
-pub struct _66;
-impl Value for _66 {
-	const VALUE: u32 = 66;
-}
-/// Type representing the value 67 for the `Value` trait.
-pub struct _67;
-impl Value for _67 {
-	const VALUE: u32 = 67;
-}
-/// Type representing the value 68 for the `Value` trait.
-pub struct _68;
-impl Value for _68 {
-	const VALUE: u32 = 68;
-}
-/// Type representing the value 69 for the `Value` trait.
-pub struct _69;
-impl Value for _69 {
-	const VALUE: u32 = 69;
-}
-/// Type representing the value 70 for the `Value` trait.
-pub struct _70;
-impl Value for _70 {
-	const VALUE: u32 = 70;
-}
-/// Type representing the value 71 for the `Value` trait.
-pub struct _71;
-impl Value for _71 {
-	const VALUE: u32 = 71;
-}
-/// Type representing the value 72 for the `Value` trait.
-pub struct _72;
-impl Value for _72 {
-	const VALUE: u32 = 72;
-}
-/// Type representing the value 73 for the `Value` trait.
-pub struct _73;
-impl Value for _73 {
-	const VALUE: u32 = 73;
-}
-/// Type representing the value 74 for the `Value` trait.
-pub struct _74;
-impl Value for _74 {
-	const VALUE: u32 = 74;
-}
-/// Type representing the value 75 for the `Value` trait.
-pub struct _75;
-impl Value for _75 {
-	const VALUE: u32 = 75;
-}
-/// Type representing the value 76 for the `Value` trait.
-pub struct _76;
-impl Value for _76 {
-	const VALUE: u32 = 76;
-}
-/// Type representing the value 77 for the `Value` trait.
-pub struct _77;
-impl Value for _77 {
-	const VALUE: u32 = 77;
-}
-/// Type representing the value 78 for the `Value` trait.
-pub struct _78;
-impl Value for _78 {
-	const VALUE: u32 = 78;
-}
-/// Type representing the value 79 for the `Value` trait.
-pub struct _79;
-impl Value for _79 {
-	const VALUE: u32 = 79;
-}
-/// Type representing the value 80 for the `Value` trait.
-pub struct _80;
-impl Value for _80 {
-	const VALUE: u32 = 80;
-}
-/// Type representing the value 81 for the `Value` trait.
-pub struct _81;
-impl Value for _81 {
-	const VALUE: u32 = 81;
-}
-/// Type representing the value 82 for the `Value` trait.
-pub struct _82;
-impl Value for _82 {
-	const VALUE: u32 = 82;
-}
-/// Type representing the value 83 for the `Value` trait.
-pub struct _83;
-impl Value for _83 {
-	const VALUE: u32 = 83;
-}
-/// Type representing the value 84 for the `Value` trait.
-pub struct _84;
-impl Value for _84 {
-	const VALUE: u32 = 84;
-}
-/// Type representing the value 85 for the `Value` trait.
-pub struct _85;
-impl Value for _85 {
-	const VALUE: u32 = 85;
-}
-/// Type representing the value 86 for the `Value` trait.
-pub struct _86;
-impl Value for _86 {
-	const VALUE: u32 = 86;
-}
-/// Type representing the value 87 for the `Value` trait.
-pub struct _87;
-impl Value for _87 {
-	const VALUE: u32 = 87;
-}
-/// Type representing the value 88 for the `Value` trait.
-pub struct _88;
-impl Value for _88 {
-	const VALUE: u32 = 88;
-}
-/// Type representing the value 89 for the `Value` trait.
-pub struct _89;
-impl Value for _89 {
-	const VALUE: u32 = 89;
-}
-/// Type representing the value 90 for the `Value` trait.
-pub struct _90;
-impl Value for _90 {
-	const VALUE: u32 = 90;
-}
-/// Type representing the value 91 for the `Value` trait.
-pub struct _91;
-impl Value for _91 {
-	const VALUE: u32 = 91;
-}
-/// Type representing the value 92 for the `Value` trait.
-pub struct _92;
-impl Value for _92 {
-	const VALUE: u32 = 92;
-}
-/// Type representing the value 93 for the `Value` trait.
-pub struct _93;
-impl Value for _93 {
-	const VALUE: u32 = 93;
-}
-/// Type representing the value 94 for the `Value` trait.
-pub struct _94;
-impl Value for _94 {
-	const VALUE: u32 = 94;
-}
-/// Type representing the value 95 for the `Value` trait.
-pub struct _95;
-impl Value for _95 {
-	const VALUE: u32 = 95;
-}
-/// Type representing the value 96 for the `Value` trait.
-pub struct _96;
-impl Value for _96 {
-	const VALUE: u32 = 96;
-}
-/// Type representing the value 97 for the `Value` trait.
-pub struct _97;
-impl Value for _97 {
-	const VALUE: u32 = 97;
-}
-/// Type representing the value 98 for the `Value` trait.
-pub struct _98;
-impl Value for _98 {
-	const VALUE: u32 = 98;
-}
-/// Type representing the value 99 for the `Value` trait.
-pub struct _99;
-impl Value for _99 {
-	const VALUE: u32 = 99;
-}
-/// Type representing the value 100 for the `Value` trait.
-pub struct _100;
-impl Value for _100 {
-	const VALUE: u32 = 100;
-}
-/// Type representing the value 112 for the `Value` trait.
-pub struct _112;
-impl Value for _112 {
-	const VALUE: u32 = 112;
-}
-/// Type representing the value 128 for the `Value` trait.
-pub struct _128;
-impl Value for _128 {
-	const VALUE: u32 = 128;
-}
-/// Type representing the value 160 for the `Value` trait.
-pub struct _160;
-impl Value for _160 {
-	const VALUE: u32 = 160;
-}
-/// Type representing the value 192 for the `Value` trait.
-pub struct _192;
-impl Value for _192 {
-	const VALUE: u32 = 192;
-}
-/// Type representing the value 224 for the `Value` trait.
-pub struct _224;
-impl Value for _224 {
-	const VALUE: u32 = 224;
-}
-/// Type representing the value 256 for the `Value` trait.
-pub struct _256;
-impl Value for _256 {
-	const VALUE: u32 = 256;
-}
-/// Type representing the value 384 for the `Value` trait.
-pub struct _384;
-impl Value for _384 {
-	const VALUE: u32 = 384;
-}
-/// Type representing the value 512 for the `Value` trait.
-pub struct _512;
-impl Value for _512 {
-	const VALUE: u32 = 512;
+macro_rules! decl_value {
+    ( $( $value:expr ),* ) => {
+        $(
+            paste::paste! {
+                #[doc = "Type representing the value " $value " for the `Value` trait."]
+                pub struct [< _ $value >];
+                impl Value for [< _ $value >] {
+                    const VALUE: u32 = $value;
+                }
+            }
+        )*
+    };
 }
+
+#[rustfmt::skip]
+decl_value!(
+	0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
+    21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
+    41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60,
+    61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80,
+    81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100,
+    112, 128, 160, 192, 224, 256, 384, 512
+);