From cf9d2b10b8fe0670e9b3b47b2326c4d587401985 Mon Sep 17 00:00:00 2001
From: Kamen Mladenov <kamen@syndamia.com>
Date: Tue, 21 Jan 2025 16:14:04 +0200
Subject: feat(guests/graph_coloring): Support no_std conditionally

For use in Nexus
---
 guests/graph_coloring/Cargo.toml | 3 +++
 guests/graph_coloring/src/lib.rs | 7 +++++++
 2 files changed, 10 insertions(+)

diff --git a/guests/graph_coloring/Cargo.toml b/guests/graph_coloring/Cargo.toml
index 180ec35..a0cbd83 100644
--- a/guests/graph_coloring/Cargo.toml
+++ b/guests/graph_coloring/Cargo.toml
@@ -5,3 +5,6 @@ edition = "2021"
 
 [dependencies]
 guests_macro = { version = "0.1.0", path = "../../guests_macro" }
+
+[features]
+no_std = []
diff --git a/guests/graph_coloring/src/lib.rs b/guests/graph_coloring/src/lib.rs
index 691a127..6dc1cf3 100644
--- a/guests/graph_coloring/src/lib.rs
+++ b/guests/graph_coloring/src/lib.rs
@@ -1,3 +1,10 @@
+#![cfg_attr(feature = "no_std", no_std)]
+
+#[cfg(feature = "no_std")]
+extern crate alloc;
+#[cfg(feature = "no_std")]
+use alloc::vec::Vec;
+
 #[guests_macro::proving_entrypoint]
 pub fn main(
     graph: Vec<Vec<bool>>,
-- 
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