From 87bf378b69e28d1c8350a3dd7ec49f0c4622e704 Mon Sep 17 00:00:00 2001
From: Andrew Golovashevich <landgrafhomyak@gmail.com>
Date: Sat, 15 Nov 2025 22:51:39 +0300
Subject: [PATCH] builder_trait_decl

---
 src/macros/builder_trait_decl.rs | 37 ++++++++++++++++++++++++++++++++
 src/macros/mod.rs                |  3 ++-
 2 files changed, 39 insertions(+), 1 deletion(-)
 create mode 100644 src/macros/builder_trait_decl.rs

diff --git a/src/macros/builder_trait_decl.rs b/src/macros/builder_trait_decl.rs
new file mode 100644
index 0000000..209a84f
--- /dev/null
+++ b/src/macros/builder_trait_decl.rs
@@ -0,0 +1,37 @@
+#[macro_export]
+macro_rules! builder_trait_decl {
+    (
+        $name:ident
+        $(<
+            $generic0Name:ident : $generic0Bound:path $(, $genericNName:ident : $genericNBound:path)*
+        >)?
+        $(: $base0:path $(, $baseN:path)*)?
+        { $($body:tt)* }
+    ) => {
+        trait $name
+        <
+            'source, 'pos, 'builder, C, P:Pos<'pos>, CS:CollectedSubstring<'source, C>
+            $(, $generic0Name : $generic0Bound $(, $genericNName : $genericNBound)* )?
+        >
+        $(: $base0 $(, $baseN)*)?
+        { $($body)* }
+    };
+    (
+        $name:ident
+        <
+            $lifetime0Name:lifetime $(, $lifetimeNName:lifetime)*
+            $(, $genericNName:ident : $genericNBound:path)*
+        >
+        $(: $base0:path $(, $baseN:path)*)?
+        { $($body:tt)* }
+    ) => {
+        fn $name
+        <
+            'source, 'pos, 'builder, $lifetime0Name $(, $lifetimeNName)*,
+            C, P: Pos<'pos>, CS: CollectedSubstring<'source, C>
+            $(, $genericNName : $genericNBound)*
+        >
+       $(: $base0 $(, $baseN)*)?
+        { $($body)* }
+    };
+}
\ No newline at end of file
diff --git a/src/macros/mod.rs b/src/macros/mod.rs
index 9adc1b6..c69c43d 100644
--- a/src/macros/mod.rs
+++ b/src/macros/mod.rs
@@ -1,2 +1,3 @@
 mod builder_type_t;
-mod parser_func;
\ No newline at end of file
+mod parser_func;
+mod builder_trait_decl;
\ No newline at end of file