Add schema_for macro

schemars/src/lib.rs

@@ -2,6 +2,9 @@ pub mod gen;
 pub mod make_schema;
 pub mod schema;
 
+#[macro_use]
+mod macros;
+
 pub use make_schema::MakeSchema;
 
 pub use schemars_derive::*;

schemars/src/macros.rs

@@ -0,0 +1,6 @@
+#[macro_export()]
+macro_rules! schema_for {
+    ($($type:tt)+) => {
+        $crate::gen::SchemaGenerator::new().into_root_schema_for::<$($type)+>()
+    };
+}

schemars/src/main.rs

@@ -1,9 +1,9 @@
-use schemars::*;
+use schemars::schema_for;
+use schemars::schema::Schema;
 use serde_json::Result;
 
 fn main() -> Result<()> {
-    let gen = gen::SchemaGenerator::new();
-    let schema = gen.into_root_schema_for::<schema::Schema>();
+    let schema = schema_for!(Schema);
     let json = serde_json::to_string_pretty(&schema)?;
     println!("{}", json);
 

schemars/tests/test.rs

@@ -1,5 +1,5 @@
-use schemars::gen::SchemaGenerator;
 use schemars::schema::*;
+use schemars::schema_for;
 use serde_json::{from_str, to_string_pretty};
 use std::fs;
 
@@ -12,8 +12,7 @@ mod tests {
         let expected_json = fs::read_to_string("tests/schema.json")?;
         let expected: Schema = from_str(&expected_json)?;
 
-        let gen = SchemaGenerator::new();
-        let actual = gen.into_root_schema_for::<Schema>();
+        let actual = schema_for!(Schema);
         fs::write("tests/schema.actual.json", to_string_pretty(&actual)?)?;
 
         assert_eq!(actual, expected, "\n\nGenerated schema did not match saved schema - generated schema has been written to \"tests/schema.actual.json\".");