introduce variant typing to policy result

codex-rs/execpolicy2/src/main.rs

@@ -4,6 +4,7 @@ use std::path::Path;
 use anyhow::Context;
 use anyhow::Result;
 use anyhow::bail;
+use codex_execpolicy2::Evaluation;
 use codex_execpolicy2::PolicyParser;
 use codex_execpolicy2::load_default_policy;
 
@@ -49,14 +50,14 @@ fn cmd_check(policy_path: Option<String>, args: Vec<String>) -> Result<()> {
     let policy = load_policy(policy_path)?;
 
     match policy.evaluate(&args) {
-        Some(eval) => {
+        eval @ Evaluation::Match { .. } => {
             let json = serde_json::to_string_pretty(&eval)?;
             println!("{json}");
         }
-        None => {
+        Evaluation::NoMatch => {
             println!("no match");
         }
-    }
+    };
     Ok(())
 }