From 94686565dc145122fbb7b4132ac89fb79bbe3fde Mon Sep 17 00:00:00 2001
From: Nikita Strygin <dcnick3@users.noreply.github.com>
Date: Mon, 11 Mar 2024 15:27:08 +0300
Subject: [PATCH] [refactor] #3682: remove direct dependency on syn 1

Signed-off-by: Nikita Strygin <dcnick3@users.noreply.github.com>
---
 Cargo.lock               |  2 --
 Cargo.toml               |  1 -
 macro/utils/Cargo.toml   |  1 -
 macro/utils/src/lib.rs   | 66 ----------------------------------------
 schema/derive/Cargo.toml |  2 +-
 5 files changed, 1 insertion(+), 71 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index a5373aded67..0d83e78f461 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3064,7 +3064,6 @@ dependencies = [
  "manyhow",
  "proc-macro2",
  "quote",
- "syn 1.0.109",
  "syn 2.0.41",
 ]
 
@@ -3675,7 +3674,6 @@ dependencies = [
  "manyhow-macros",
  "proc-macro2",
  "quote",
- "syn 1.0.109",
  "syn 2.0.41",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index c7277102586..b44da28f4f0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -60,7 +60,6 @@ test_network = { version = "=2.0.0-pre-rc.20", path = "core/test_network" }
 
 proc-macro-error = "1.0.4"
 proc-macro2 = "1.0.69"
-syn = { package = "syn", version = "1.0.109", default-features = false }
 syn2 = { package = "syn", version = "2.0.38", default-features = false }
 quote = "1.0.33"
 manyhow = { version = "0.8.1", features = ["darling"] }
diff --git a/macro/utils/Cargo.toml b/macro/utils/Cargo.toml
index 6ee6c66a572..7167dafe639 100644
--- a/macro/utils/Cargo.toml
+++ b/macro/utils/Cargo.toml
@@ -13,7 +13,6 @@ is-it-maintained-open-issues = { repository = "https://github.com/hyperledger/ir
 maintenance = { status = "actively-developed" }
 
 [dependencies]
-syn = { workspace = true, features = ["default", "parsing", "printing"] }
 syn2 = { workspace = true, features = ["default", "parsing", "printing"] }
 darling = { workspace = true }
 quote = { workspace = true }
diff --git a/macro/utils/src/lib.rs b/macro/utils/src/lib.rs
index 1e069d1bfd8..77127e73c02 100644
--- a/macro/utils/src/lib.rs
+++ b/macro/utils/src/lib.rs
@@ -4,72 +4,6 @@ mod emitter;
 
 pub use emitter::Emitter;
 
-/// Trait for attribute parsing generalization
-pub trait AttrParser<Inner: syn::parse::Parse> {
-    /// Attribute identifier `#[IDENT...]`
-    const IDENT: &'static str;
-
-    /// Parse `Inner` content of attribute
-    ///
-    /// # Errors
-    /// - If `Inner` parsing failed
-    /// - If `IDENT` doesn't match
-    fn parse(attr: &syn::Attribute) -> syn::Result<Inner> {
-        attr.path
-            .is_ident(&<Self as AttrParser<_>>::IDENT)
-            .then(|| attr.parse_args::<Inner>())
-            .map_or_else(
-                || {
-                    Err(syn::parse::Error::new_spanned(
-                        attr,
-                        format!(
-                            "Attribute must be in form #[{}...]",
-                            <Self as AttrParser<_>>::IDENT
-                        ),
-                    ))
-                },
-                |inner| inner,
-            )
-    }
-}
-
-/// Macro for automatic [`syn::parse::Parse`] impl generation for keyword
-/// attribute structs in derive macros.
-#[macro_export]
-macro_rules! attr_struct {
-    // Matching struct with named fields
-    (
-        $( #[$meta:meta] )*
-    //  ^~~~attributes~~~~^
-        $vis:vis struct $name:ident {
-            $(
-                $( #[$field_meta:meta] )*
-    //          ^~~~field attributes~~~!^
-                $field_vis:vis $field_name:ident : $field_ty:ty
-    //          ^~~~~~~~~~~~~~~~~a single field~~~~~~~~~~~~~~~^
-            ),*
-        $(,)? }
-    ) => {
-        $( #[$meta] )*
-        $vis struct $name {
-            $(
-                $( #[$field_meta] )*
-                $field_vis $field_name : $field_ty
-            ),*
-        }
-
-        impl syn::parse::Parse for $name {
-            fn parse(input: syn::parse::ParseStream) -> syn::Result<Self> {
-                Ok(Self {
-                    $(
-                        $field_name: input.parse()?,
-                    )*
-                })
-            }
-        }
-    };
-}
-
 /// Extension trait for [`darling::Error`].
 ///
 /// Currently exists to add `with_spans` method.
diff --git a/schema/derive/Cargo.toml b/schema/derive/Cargo.toml
index d17a56721ee..d7d8e10527f 100644
--- a/schema/derive/Cargo.toml
+++ b/schema/derive/Cargo.toml
@@ -17,7 +17,7 @@ proc-macro = true
 syn2 = { workspace = true, features = ["default", "full"] }
 proc-macro2 = { workspace = true }
 quote = { workspace = true }
-manyhow = { workspace = true, features = ["syn1", "darling"] }
+manyhow = { workspace = true, features = ["darling"] }
 darling = { workspace = true }
 
 [dev-dependencies]