fix: update examples

Author: josh-tracey

examples/custom_tool.rs

@@ -56,14 +56,19 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     function_handlers.insert(
         "get_current_weather".to_string(),
-        Box::new(|args: &mut serde_json::Value| {
-            if let Some(_location) = args.get("location").and_then(|v| v.as_str()) {
-                // This is a dummy implementation, would normally call an external API, etc.
-                Ok(serde_json::json!({ "temperature": 15, "condition": "Cloudy" }))
-            } else {
-                Err("Missing 'location' argument".to_string())
-            }
-        }),
+        FunctionHandler::Sync(Box::new(|args: &mut serde_json::Value| {
+            let location = args
+                .get("location")
+                .and_then(|v| v.as_str())
+                .unwrap_or("London, UK");
+            let weather_info = format!(
+                "The current weather in {} is sunny with a temperature of 20°C.",
+                location
+            );
+            Ok(serde_json::json!({
+                "weather": weather_info
+            }))
+        })),
     );
 
     let response = client

examples/tool_param_types.rs

@@ -46,7 +46,7 @@ use gemini_client_rs::{
         ParameterPropertyArray, ParameterPropertyBoolean, ParameterPropertyInteger,
         ParameterPropertyString, Role, Tool, ToolConfig, ToolConfigFunctionDeclaration,
     },
-    GeminiClient,
+    FunctionHandler, GeminiClient,
 };
 
 use dotenvy::dotenv;
@@ -333,14 +333,11 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
             std::env::var("GEMINI_MODEL_NAME").unwrap_or_else(|_| "gemini-2.5-flash".to_string());
 
         // Set up function handler
-        let mut function_handlers: HashMap<
-            String,
-            Box<dyn Fn(&mut serde_json::Value) -> Result<serde_json::Value, String> + Send + Sync>,
-        > = HashMap::new();
+        let mut function_handlers: HashMap<String, FunctionHandler> = HashMap::new();
 
         function_handlers.insert(
             "schedule_meeting".to_string(),
-            Box::new(|args: &mut serde_json::Value| {
+            FunctionHandler::Sync(Box::new(|args: &mut serde_json::Value| {
                 // Deserialize the arguments using the MeetingRequest struct
                 let meeting_request: MeetingRequest = serde_json::from_value(args.clone())
                     .map_err(|e| format!("Failed to deserialize meeting request: {}", e))?;
@@ -375,7 +372,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
                 // Serialize the response back to JSON
                 serde_json::to_value(response)
                     .map_err(|e| format!("Failed to serialize meeting response: {}", e))
-            }),
+            })),
         );
 
         // Make the request