From 3f2f932a557358b3d5cf05e174ca34c24413b0a3 Mon Sep 17 00:00:00 2001
From: Robbert van der Helm <mail@robbertvanderhelm.nl>
Date: Tue, 25 Jan 2022 19:54:27 +0100
Subject: [PATCH] Add a function for getting pointers from params

So we don't need to implement this ad-hoc. That would even be impossible
to do correctly inside of the proc macro.
---
 nih_plug/src/params.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/nih_plug/src/params.rs b/nih_plug/src/params.rs
index ea9d224d..237af635 100644
--- a/nih_plug/src/params.rs
+++ b/nih_plug/src/params.rs
@@ -144,7 +144,7 @@ impl ParamPtr {
 }
 
 macro_rules! impl_plainparam {
-    ($ty:ty) => {
+    ($ty:ident) => {
         impl $ty {
             /// Set this parameter based on a string. Returns whether the updating succeeded. That
             /// can fail if the string cannot be parsed.
@@ -176,6 +176,11 @@ macro_rules! impl_plainparam {
             pub fn set_normalized_value(&mut self, normalized: f32) {
                 self.value = self.range.unnormalize(normalized);
             }
+
+            /// Implementation detail for implementing [Params]. This should not be used directly.
+            pub fn as_ptr(&self) -> ParamPtr {
+                ParamPtr::$ty(self as *const $ty as *mut $ty)
+            }
         }
     };
 }