Add a JSON Schema implementation for the regex crate (#9)

It's basically just a string anyway.

Merge #8 first.

See also oxc-project/oxc#15978

Resolves oxc-project/oxc#15203

Author: connorshea

Cargo.lock

@@ -40,6 +40,7 @@ bigdecimal04 = { version = "0.4", default-features = false, optional = true, pac
 enumset = { version = "1.0", optional = true }
 smol_str = { version = "0.1.17", optional = true }
 semver = { version = "1.0.9", features = ["serde"], optional = true }
+regex = { version = "1.12", optional = true }
 
 [dev-dependencies]
 pretty_assertions = "1.2.1"
@@ -123,6 +124,10 @@ required-features = ["enumset"]
 name = "smol_str"
 required-features = ["smol_str"]
 
+[[test]]
+name = "regex"
+required-features = ["regex"]
+
 [[test]]
 name = "semver"
 required-features = ["semver"]

schemars/Cargo.toml

@@ -87,3 +87,5 @@ mod uuid08;
 #[cfg(feature = "uuid1")]
 mod uuid1;
 mod wrapper;
+#[cfg(feature = "regex")]
+mod regex;

schemars/src/json_schema_impls/mod.rs

@@ -0,0 +1,6 @@
+use crate::r#gen::SchemaGenerator;
+use crate::schema::*;
+use crate::JsonSchema;
+use regex::Regex;
+
+forward_impl!(Regex => String);

schemars/src/json_schema_impls/regex.rs

@@ -0,0 +1,8 @@
+mod util;
+use regex::Regex;
+use util::*;
+
+#[test]
+fn regex() -> TestResult {
+    test_default_generated_schema::<Regex>("regex")
+}