feat: Add impls for the time crate.

schemars/Cargo.toml

@@ -33,6 +33,7 @@ smallvec1 = { version = "1.0", default-features = false, optional = true, packag
 smol_str02 = { version = "0.2.1", default-features = false, optional = true, package = "smol_str" }
 url2 = { version = "2.0", default-features = false, optional = true, package = "url" }
 uuid1 = { version = "1.0", default-features = false, optional = true, package = "uuid" }
+time = { version = "0.3", default-features = false, optional = true }
 
 [dev-dependencies]
 pretty_assertions = "1.2.1"
@@ -120,6 +121,10 @@ required-features = ["semver1"]
 name = "decimal"
 required-features = ["rust_decimal1", "bigdecimal04"]
 
+[[test]]
+name = "time"
+required-features = ["time"]
+
 [package.metadata.docs.rs]
 all-features = true
 rustdoc-args = ["--extend-css", "docs-rs-custom.css"]

schemars/src/json_schema_impls/mod.rs

@@ -48,6 +48,7 @@ mod primitives;
 mod sequences;
 mod serdejson;
 mod std_time;
+#[cfg(feature = "time")]
 mod time;
 mod tuple;
 mod wrapper;

schemars/src/json_schema_impls/time.rs

@@ -0,0 +1,35 @@
+use crate::SchemaGenerator;
+use crate::{json_schema, JsonSchema, Schema};
+use alloc::borrow::Cow;
+use time::{Date, OffsetDateTime, PrimitiveDateTime, Time};
+
+macro_rules! formatted_string_impl {
+    ($ty:ident, $format:literal) => {
+        formatted_string_impl!($ty, $format, JsonSchema for $ty);
+    };
+    ($ty:ident, $format:literal, $($desc:tt)+) => {
+        impl $($desc)+ {
+            always_inline!();
+
+            fn schema_name() -> Cow<'static, str> {
+                stringify!($ty).into()
+            }
+
+            fn schema_id() -> Cow<'static, str>  {
+                stringify!(time::$ty).into()
+            }
+
+            fn json_schema(_: &mut SchemaGenerator) -> Schema {
+                json_schema!({
+                    "type": "string",
+                    "format": $format
+                })
+            }
+        }
+    };
+}
+
+formatted_string_impl!(Date, "date");
+formatted_string_impl!(PrimitiveDateTime, "partial-date-time");
+formatted_string_impl!(Time, "time");
+formatted_string_impl!(OffsetDateTime, "date-time");

schemars/tests/expected/time-types.json

@@ -0,0 +1,29 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "TimeTypes",
+  "type": "object",
+  "properties": {
+    "date": {
+      "type": "string",
+      "format": "date"
+    },
+    "offset_date_time": {
+      "type": "string",
+      "format": "date-time"
+    },
+    "primitive_date_time": {
+      "type": "string",
+      "format": "partial-date-time"
+    },
+    "time": {
+      "type": "string",
+      "format": "time"
+    }
+  },
+  "required": [
+    "date",
+    "offset_date_time",
+    "primitive_date_time",
+    "time"
+  ]
+}

schemars/tests/time.rs

@@ -0,0 +1,18 @@
+mod util;
+use schemars::JsonSchema;
+use time::{Date, OffsetDateTime, PrimitiveDateTime, Time};
+use util::*;
+
+#[allow(dead_code)]
+#[derive(JsonSchema)]
+struct TimeTypes {
+    date: Date,
+    offset_date_time: OffsetDateTime,
+    primitive_date_time: PrimitiveDateTime,
+    time: Time,
+}
+
+#[test]
+fn time_types() -> TestResult {
+    test_default_generated_schema::<TimeTypes>("time-types")
+}