feat(ops): V8 Fast Calls (#15291)

ops/tests/compile_fail/unsupported.rs

@@ -0,0 +1,27 @@
+// Copyright 2019-2020 the Deno authors. All rights reserved. MIT license.
+
+use deno_ops::op;
+
+#[op(fast)]
+fn op_result_return(a: i32, b: i32) -> Result<(), ()> {
+  a + b
+}
+
+#[op(fast)]
+fn op_u8_arg(a: u8, b: u8) {
+  //
+}
+
+#[op(fast)]
+fn op_u16_arg(a: u16, b: u16) {
+  //
+}
+
+#[op(fast)]
+async fn op_async_fn(a: i32, b: i32) -> i32 {
+  a + b
+}
+
+fn main() {
+  // pass
+}

ops/tests/compile_fail/unsupported.stderr

@@ -0,0 +1,31 @@
+error: custom attribute panicked
+ --> tests/compile_fail/unsupported.rs:5:1
+  |
+5 | #[op(fast)]
+  | ^^^^^^^^^^^
+  |
+  = help: message: op cannot be a fast api. enforced by #[op(fast)]
+
+error: custom attribute panicked
+  --> tests/compile_fail/unsupported.rs:10:1
+   |
+10 | #[op(fast)]
+   | ^^^^^^^^^^^
+   |
+   = help: message: op cannot be a fast api. enforced by #[op(fast)]
+
+error: custom attribute panicked
+  --> tests/compile_fail/unsupported.rs:15:1
+   |
+15 | #[op(fast)]
+   | ^^^^^^^^^^^
+   |
+   = help: message: op cannot be a fast api. enforced by #[op(fast)]
+
+error: custom attribute panicked
+  --> tests/compile_fail/unsupported.rs:20:1
+   |
+20 | #[op(fast)]
+   | ^^^^^^^^^^^
+   |
+   = help: message: async op cannot be a fast api. enforced by #[op(fast)]

ops/tests/mod.rs

@@ -0,0 +1,5 @@
+#[test]
+fn op_macro() {
+  let t = trybuild::TestCases::new();
+  t.compile_fail("tests/compile_fail/*.rs");
+}