diff --git a/src/ble_error.rs b/src/ble_error.rs
index 59aab37..5abcd28 100644
--- a/src/ble_error.rs
+++ b/src/ble_error.rs
@@ -1,5 +1,5 @@
 use core::num::NonZeroI32;
-use esp_idf_svc::sys as esp_idf_sys;
+use esp_idf_svc::sys;
 
 #[derive(Copy, Clone, Eq, PartialEq, Hash)]
 pub struct BLEError(NonZeroI32);
@@ -15,14 +15,14 @@ impl BLEError {
 
   pub fn check_and_return<T>(error: u32, value: T) -> Result<T, Self> {
     match error {
-      0 | esp_idf_sys::BLE_HS_EALREADY | esp_idf_sys::BLE_HS_EDONE => Ok(value),
+      0 | sys::BLE_HS_EALREADY | sys::BLE_HS_EDONE => Ok(value),
       error => Err(Self(unsafe { NonZeroI32::new_unchecked(error as _) })),
     }
   }
 
   pub const fn convert(error: u32) -> Result<(), Self> {
     match error {
-      0 | esp_idf_sys::BLE_HS_EALREADY | esp_idf_sys::BLE_HS_EDONE => Ok(()),
+      0 | sys::BLE_HS_EALREADY | sys::BLE_HS_EDONE => Ok(()),
       error => Err(Self(unsafe { NonZeroI32::new_unchecked(error as _) })),
     }
   }
@@ -57,140 +57,128 @@ impl core::fmt::Debug for BLEError {
 #[cfg(feature = "std")]
 impl std::error::Error for BLEError {}
 
+/// ATT errors (BLE_HS_ERR_ATT_BASE : 0x100)
+macro_rules! ATT_ERR {
+  ($x:expr) => {
+    const { sys::BLE_HS_ERR_ATT_BASE + $x }
+  };
+}
+
+/// HCI errors (BLE_HS_ERR_HCI_BASE : 0x200)
+macro_rules! HCI_ERR {
+  ($x:expr) => {
+    const { sys::BLE_HS_ERR_HCI_BASE + $x }
+  };
+}
+
+/// L2CAP errors (BLE_HS_ERR_L2C_BASE : 0x300)
+macro_rules! L2C_ERR {
+  ($x:expr) => {
+    const { sys::BLE_HS_ERR_L2C_BASE + $x }
+  };
+}
+
+/// local Security Manager errors (BLE_HS_ERR_SM_US_BASE : 0x400)
+macro_rules! SM_US_ERR {
+  ($x:expr) => {
+    const { sys::BLE_HS_ERR_SM_US_BASE + $x }
+  };
+}
+
+/// Error base for remote (peer) Security Manager errors (BLE_HS_ERR_SM_PEER_BASE : 0x500)
+macro_rules! SM_PEER_ERR {
+  ($x:expr) => {
+    const { sys::BLE_HS_ERR_SM_PEER_BASE + $x }
+  };
+}
+
+/// hardware errors (BLE_HS_ERR_HW_BASE : 0x600)
+macro_rules! HW_ERR {
+  ($x:expr) => {
+    const { sys::BLE_HS_ERR_HW_BASE + $x }
+  };
+}
+
 pub fn return_code_to_string(rc: i32) -> Option<&'static str> {
-  let rc = rc as u32;
-  if rc < 0x100 {
-    match rc {
-      esp_idf_sys::BLE_HS_EALREADY => Some("Operation already in progress or completed."),
-      esp_idf_sys::BLE_HS_EINVAL => Some("One or more arguments are invalid."),
-      esp_idf_sys::BLE_HS_EMSGSIZE => Some("The provided buffer is too small."),
-      esp_idf_sys::BLE_HS_ENOENT => Some("No entry matching the specified criteria."),
-      esp_idf_sys::BLE_HS_ENOMEM => Some("Operation failed due to resource exhaustion."),
-      esp_idf_sys::BLE_HS_ENOTCONN => Some("No open connection with the specified handle."),
-      esp_idf_sys::BLE_HS_ENOTSUP => Some("Operation disabled at compile time."),
-      esp_idf_sys::BLE_HS_EAPP => Some("Application callback behaved unexpectedly."),
-      esp_idf_sys::BLE_HS_EBADDATA => Some("Command from peer is invalid."),
-      esp_idf_sys::BLE_HS_EOS => Some("Mynewt OS error."),
-      esp_idf_sys::BLE_HS_ECONTROLLER => Some("Event from controller is invalid."),
-      esp_idf_sys::BLE_HS_ETIMEOUT => Some("Operation timed out."),
-      esp_idf_sys::BLE_HS_EDONE => Some("Operation completed successfully."),
-      esp_idf_sys::BLE_HS_EBUSY => Some("Operation cannot be performed until procedure completes."),
-      esp_idf_sys::BLE_HS_EREJECT => Some("Peer rejected a connection parameter update request."),
-      esp_idf_sys::BLE_HS_EUNKNOWN => Some("Unexpected failure; catch all."),
-      esp_idf_sys::BLE_HS_EROLE => {
-        Some("Operation requires different role (e.g., central vs. peripheral).")
-      }
-      esp_idf_sys::BLE_HS_ETIMEOUT_HCI => Some("HCI request timed out; controller unresponsive."),
-      esp_idf_sys::BLE_HS_ENOMEM_EVT => Some(
-        "Controller failed to send event due to memory exhaustion (combined host-controller only).",
-      ),
-      esp_idf_sys::BLE_HS_ENOADDR => {
-        Some("Operation requires an identity address but none configured.")
-      }
-      esp_idf_sys::BLE_HS_ENOTSYNCED => {
-        Some("Attempt to use the host before it is synced with controller.")
-      }
-      esp_idf_sys::BLE_HS_EAUTHEN => Some("Insufficient authentication."),
-      esp_idf_sys::BLE_HS_EAUTHOR => Some("Insufficient authorization."),
-      esp_idf_sys::BLE_HS_EENCRYPT => Some("Insufficient encryption level."),
-      esp_idf_sys::BLE_HS_EENCRYPT_KEY_SZ => Some("Insufficient key size"),
-      esp_idf_sys::BLE_HS_ESTORE_CAP => Some("Storage at capacity."),
-      esp_idf_sys::BLE_HS_ESTORE_FAIL => Some("Storage IO error."),
-      _ => None,
-    }
-  } else if rc < (esp_idf_sys::BLE_HS_ERR_ATT_BASE + 0x100) {
-    let rc_ = rc - esp_idf_sys::BLE_HS_ERR_ATT_BASE;
-    match rc_ {
-      esp_idf_sys::BLE_ATT_ERR_INVALID_HANDLE => Some("The attribute handle given was not valid on this server."),
-      esp_idf_sys::BLE_ATT_ERR_READ_NOT_PERMITTED  => Some("The attribute cannot be read."),
-      esp_idf_sys::BLE_ATT_ERR_WRITE_NOT_PERMITTED => Some("The attribute cannot be written."),
-      esp_idf_sys::BLE_ATT_ERR_INVALID_PDU => Some("The attribute PDU was invalid."),
-      esp_idf_sys::BLE_ATT_ERR_INSUFFICIENT_AUTHEN => Some("The attribute requires authentication before it can be read or written."),
-      esp_idf_sys::BLE_ATT_ERR_REQ_NOT_SUPPORTED => Some("Attribute server does not support the request received from the client."),
-      esp_idf_sys::BLE_ATT_ERR_INVALID_OFFSET => Some("Offset specified was past the end of the attribute."),
-      esp_idf_sys::BLE_ATT_ERR_INSUFFICIENT_AUTHOR => Some("The attribute requires authorization before it can be read or written."),
-      esp_idf_sys::BLE_ATT_ERR_PREPARE_QUEUE_FULL => Some("Too many prepare writes have been queued."),
-      esp_idf_sys::BLE_ATT_ERR_ATTR_NOT_FOUND => Some("No attribute found within the given attribute handle range."),
-      esp_idf_sys::BLE_ATT_ERR_ATTR_NOT_LONG => Some("The attribute cannot be read or written using the Read Blob Request."),
-      esp_idf_sys::BLE_ATT_ERR_INSUFFICIENT_KEY_SZ => Some("The Encryption Key Size used for encrypting this link is insufficient."),
-      esp_idf_sys::BLE_ATT_ERR_INVALID_ATTR_VALUE_LEN => Some("The attribute value length is invalid for the operation."),
-      esp_idf_sys::BLE_ATT_ERR_UNLIKELY => Some("The attribute request has encountered an error that was unlikely, could not be completed as requested."),
-      esp_idf_sys::BLE_ATT_ERR_INSUFFICIENT_ENC => Some("The attribute requires encryption before it can be read or written."),
-      esp_idf_sys::BLE_ATT_ERR_UNSUPPORTED_GROUP => Some("The attribute type is not a supported grouping attribute as defined by a higher layer specification."),
-      esp_idf_sys::BLE_ATT_ERR_INSUFFICIENT_RES => Some("Insufficient Resources to complete the request."),
-      _ => None,
-    }
-  } else if rc < (esp_idf_sys::BLE_HS_ERR_HCI_BASE + 0x100) {
-    let rc_ = rc - esp_idf_sys::BLE_HS_ERR_HCI_BASE;
-    match rc_ {
-      esp_idf_sys::BLE_L2CAP_SIG_ERR_CMD_NOT_UNDERSTOOD => {
-        Some("Invalid or unsupported incoming L2CAP sig command.")
-      }
-      esp_idf_sys::BLE_L2CAP_SIG_ERR_MTU_EXCEEDED => Some("Incoming packet too large."),
-      esp_idf_sys::BLE_L2CAP_SIG_ERR_INVALID_CID => Some("No channel with specified ID."),
-      _ => None,
-    }
-  } else if rc < (esp_idf_sys::BLE_HS_ERR_L2C_BASE + 0x100) {
-    let rc_ = rc - esp_idf_sys::BLE_HS_ERR_L2C_BASE;
-    match rc_ {
-      esp_idf_sys::BLE_SM_ERR_PASSKEY => {
-        Some("The user input of passkey failed, for example, the user cancelled the operation.")
-      }
-      esp_idf_sys::BLE_SM_ERR_OOB => Some("The OOB data is not available."),
-      esp_idf_sys::BLE_SM_ERR_AUTHREQ => Some("The pairing procedure cannot be performed as authentication requirements cannot be met due to IO capabilities of one or both devices."),
-      esp_idf_sys::BLE_SM_ERR_CONFIRM_MISMATCH => Some("The confirm value does not match the calculated compare value."),
-      esp_idf_sys::BLE_SM_ERR_PAIR_NOT_SUPP => Some("Pairing is not supported by the device."),
-      esp_idf_sys::BLE_SM_ERR_ENC_KEY_SZ => Some("The resultant encryption key size is insufficient for the security requirements of this device."),
-      esp_idf_sys::BLE_SM_ERR_CMD_NOT_SUPP => Some("The SMP command received is not supported on this device."),
-      esp_idf_sys::BLE_SM_ERR_UNSPECIFIED => Some("Pairing failed due to an unspecified reason."),
-      esp_idf_sys::BLE_SM_ERR_REPEATED => Some("Pairing or authentication procedure is disallowed because too little time has elapsed since last pairing request or security request."),
-      esp_idf_sys::BLE_SM_ERR_INVAL => Some("The Invalid Parameters error code indicates that the command length is invalid or that a parameter is outside of the specified range."),
-      esp_idf_sys::BLE_SM_ERR_DHKEY => Some("Indicates to the remote device that the DHKey Check value received doesn’t match the one calculated by the local device."),
-      esp_idf_sys::BLE_SM_ERR_NUMCMP => Some("Indicates that the confirm values in the numeric comparison protocol do not match."),
-      esp_idf_sys::BLE_SM_ERR_ALREADY => Some("Indicates that the pairing over the LE transport failed due to a Pairing Request sent over the BR/EDR transport in process."),
-      esp_idf_sys::BLE_SM_ERR_CROSS_TRANS => Some("Indicates that the BR/EDR Link Key generated on the BR/EDR transport cannot be used to derive and distribute keys for the LE transport."),
-      _ => None,
-    }
-  } else if rc < (esp_idf_sys::BLE_HS_ERR_SM_US_BASE + 0x100) {
-    let rc_ = rc - esp_idf_sys::BLE_HS_ERR_SM_US_BASE;
-    match rc_ {
-      esp_idf_sys::BLE_SM_ERR_PASSKEY => Some("The user input of passkey failed, for example, the user cancelled the operation."),
-      esp_idf_sys::BLE_SM_ERR_OOB => Some("The OOB data is not available."),
-      esp_idf_sys::BLE_SM_ERR_AUTHREQ => Some("The pairing procedure cannot be performed as authentication requirements cannot be met due to IO capabilities of one or both devices."),
-      esp_idf_sys::BLE_SM_ERR_CONFIRM_MISMATCH => Some("The confirm value does not match the calculated compare value."),
-      esp_idf_sys::BLE_SM_ERR_PAIR_NOT_SUPP => Some("Pairing is not supported by the device."),
-      esp_idf_sys::BLE_SM_ERR_ENC_KEY_SZ => Some("The resultant encryption key size is insufficient for the security requirements of this device."),
-      esp_idf_sys::BLE_SM_ERR_CMD_NOT_SUPP => Some("The SMP command received is not supported on this device."),
-      esp_idf_sys::BLE_SM_ERR_UNSPECIFIED => Some("Pairing failed due to an unspecified reason."),
-      esp_idf_sys::BLE_SM_ERR_REPEATED => Some("Pairing or authentication procedure is disallowed because too little time has elapsed since last pairing request or security request."),
-      esp_idf_sys::BLE_SM_ERR_INVAL => Some("The Invalid Parameters error code indicates that the command length is invalid or that a parameter is outside of the specified range."),
-      esp_idf_sys::BLE_SM_ERR_DHKEY => Some("Indicates to the remote device that the DHKey Check value received doesn’t match the one calculated by the local device."),
-      esp_idf_sys::BLE_SM_ERR_NUMCMP => Some("Indicates that the confirm values in the numeric comparison protocol do not match."),
-      esp_idf_sys::BLE_SM_ERR_ALREADY => Some("Indicates that the pairing over the LE transport failed due to a Pairing Request sent over the BR/EDR transport in process."),
-      esp_idf_sys::BLE_SM_ERR_CROSS_TRANS => Some("Indicates that the BR/EDR Link Key generated on the BR/EDR transport cannot be used to derive and distribute keys for the LE transport."),
-      _ => None,
-    }
-  } else {
-    //TODO: esp_idf_sys::BLE_HS_ERR_HW_BASE
-    let rc_ = rc - esp_idf_sys::BLE_HS_ERR_SM_PEER_BASE;
-    match rc_ {
-      esp_idf_sys::ble_error_codes_BLE_ERR_UNKNOWN_HCI_CMD => Some("Unknown HCI Command"),
-      esp_idf_sys::ble_error_codes_BLE_ERR_UNK_CONN_ID => Some("Unknown Connection Identifier"),
-      esp_idf_sys::ble_error_codes_BLE_ERR_AUTH_FAIL => Some("Authentication Failure"),
-      esp_idf_sys::ble_error_codes_BLE_ERR_INV_HCI_CMD_PARMS => {
-        Some("Invalid HCI Command Parameters")
-      }
-      esp_idf_sys::ble_error_codes_BLE_ERR_REM_USER_CONN_TERM => {
-        Some("Remote User Terminated Connection")
-      }
-      esp_idf_sys::ble_error_codes_BLE_ERR_CONN_TERM_LOCAL => {
-        Some("Connection Terminated By Local Host")
-      }
-      esp_idf_sys::ble_error_codes_BLE_ERR_CONN_ESTABLISHMENT => {
-        Some("Connection Failed to be Established.")
-      }
-      _ => None,
+  match rc as u32 {
+    sys::BLE_HS_EALREADY => Some("Operation already in progress or completed."),
+    sys::BLE_HS_EINVAL => Some("One or more arguments are invalid."),
+    sys::BLE_HS_EMSGSIZE => Some("The provided buffer is too small."),
+    sys::BLE_HS_ENOENT => Some("No entry matching the specified criteria."),
+    sys::BLE_HS_ENOMEM => Some("Operation failed due to resource exhaustion."),
+    sys::BLE_HS_ENOTCONN => Some("No open connection with the specified handle."),
+    sys::BLE_HS_ENOTSUP => Some("Operation disabled at compile time."),
+    sys::BLE_HS_EAPP => Some("Application callback behaved unexpectedly."),
+    sys::BLE_HS_EBADDATA => Some("Command from peer is invalid."),
+    sys::BLE_HS_EOS => Some("Mynewt OS error."),
+    sys::BLE_HS_ECONTROLLER => Some("Event from controller is invalid."),
+    sys::BLE_HS_ETIMEOUT => Some("Operation timed out."),
+    sys::BLE_HS_EDONE => Some("Operation completed successfully."),
+    sys::BLE_HS_EBUSY => Some("Operation cannot be performed until procedure completes."),
+    sys::BLE_HS_EREJECT => Some("Peer rejected a connection parameter update request."),
+    sys::BLE_HS_EUNKNOWN => Some("Unexpected failure; catch all."),
+    sys::BLE_HS_EROLE => Some("Operation requires different role (e.g., central vs. peripheral)."),
+    sys::BLE_HS_ETIMEOUT_HCI => Some("HCI request timed out; controller unresponsive."),
+    sys::BLE_HS_ENOMEM_EVT => Some(
+      "Controller failed to send event due to memory exhaustion (combined host-controller only).",
+    ),
+    sys::BLE_HS_ENOADDR => Some("Operation requires an identity address but none configured."),
+    sys::BLE_HS_ENOTSYNCED => {
+      Some("Attempt to use the host before it is synced with controller.")
     }
+    sys::BLE_HS_EAUTHEN => Some("Insufficient authentication."),
+    sys::BLE_HS_EAUTHOR => Some("Insufficient authorization."),
+    sys::BLE_HS_EENCRYPT => Some("Insufficient encryption level."),
+    sys::BLE_HS_EENCRYPT_KEY_SZ => Some("Insufficient key size"),
+    sys::BLE_HS_ESTORE_CAP => Some("Storage at capacity."),
+    sys::BLE_HS_ESTORE_FAIL => Some("Storage IO error."),
+
+    ATT_ERR!(sys::BLE_ATT_ERR_INVALID_HANDLE) => Some("The attribute handle given was not valid on this server."),
+    ATT_ERR!(sys::BLE_ATT_ERR_READ_NOT_PERMITTED) => Some("The attribute cannot be read."),
+    ATT_ERR!(sys::BLE_ATT_ERR_WRITE_NOT_PERMITTED) => Some("The attribute cannot be written."),
+    ATT_ERR!(sys::BLE_ATT_ERR_INVALID_PDU) => Some("The attribute PDU was invalid."),
+    ATT_ERR!(sys::BLE_ATT_ERR_INSUFFICIENT_AUTHEN) => Some("The attribute requires authentication before it can be read or written."),
+    ATT_ERR!(sys::BLE_ATT_ERR_REQ_NOT_SUPPORTED) => Some("Attribute server does not support the request received from the client."),
+    ATT_ERR!(sys::BLE_ATT_ERR_INVALID_OFFSET) => Some("Offset specified was past the end of the attribute."),
+    ATT_ERR!(sys::BLE_ATT_ERR_INSUFFICIENT_AUTHOR) => Some("The attribute requires authorization before it can be read or written."),
+    ATT_ERR!(sys::BLE_ATT_ERR_PREPARE_QUEUE_FULL) => Some("Too many prepare writes have been queued."),
+    ATT_ERR!(sys::BLE_ATT_ERR_ATTR_NOT_FOUND) => Some("No attribute found within the given attribute handle range."),
+    ATT_ERR!(sys::BLE_ATT_ERR_ATTR_NOT_LONG) => Some("The attribute cannot be read or written using the Read Blob Request."),
+    ATT_ERR!(sys::BLE_ATT_ERR_INSUFFICIENT_KEY_SZ) => Some("The Encryption Key Size used for encrypting this link is insufficient."),
+    ATT_ERR!(sys::BLE_ATT_ERR_INVALID_ATTR_VALUE_LEN) => Some("The attribute value length is invalid for the operation."),
+    ATT_ERR!(sys::BLE_ATT_ERR_UNLIKELY) => Some("The attribute request has encountered an error that was unlikely, could not be completed as requested."),
+    ATT_ERR!(sys::BLE_ATT_ERR_INSUFFICIENT_ENC) => Some("The attribute requires encryption before it can be read or written."),
+    ATT_ERR!(sys::BLE_ATT_ERR_UNSUPPORTED_GROUP) => Some("The attribute type is not a supported grouping attribute as defined by a higher layer specification."),
+    ATT_ERR!(sys::BLE_ATT_ERR_INSUFFICIENT_RES) => Some("Insufficient Resources to complete the request."),
+
+    HCI_ERR!(sys::ble_error_codes_BLE_ERR_UNKNOWN_HCI_CMD) => Some("Unknown HCI Command"),
+    HCI_ERR!(sys::ble_error_codes_BLE_ERR_UNK_CONN_ID) => Some("Unknown Connection Identifier"),
+    HCI_ERR!(sys::ble_error_codes_BLE_ERR_AUTH_FAIL) => Some("Authentication Failure"),
+    HCI_ERR!(sys::ble_error_codes_BLE_ERR_INV_HCI_CMD_PARMS) => Some("Invalid HCI Command Parameters"),
+    HCI_ERR!(sys::ble_error_codes_BLE_ERR_REM_USER_CONN_TERM) => Some("Remote User Terminated Connection"),
+    HCI_ERR!(sys::ble_error_codes_BLE_ERR_CONN_TERM_LOCAL) => Some("Connection Terminated By Local Host"),
+    HCI_ERR!(sys::ble_error_codes_BLE_ERR_CONN_ESTABLISHMENT) => Some("Connection Failed to be Established."),
+
+    L2C_ERR!(sys::BLE_L2CAP_SIG_ERR_CMD_NOT_UNDERSTOOD) => Some("Invalid or unsupported incoming L2CAP sig command."),
+    L2C_ERR!(sys::BLE_L2CAP_SIG_ERR_MTU_EXCEEDED) => Some("Incoming packet too large."),
+    L2C_ERR!(sys::BLE_L2CAP_SIG_ERR_INVALID_CID) => Some("No channel with specified ID."),
+
+    SM_US_ERR!(sys::BLE_SM_ERR_PASSKEY) => Some("The user input of passkey failed, for example, the user cancelled the operation."),
+    SM_US_ERR!(sys::BLE_SM_ERR_OOB)=> Some("The OOB data is not available."),
+    SM_US_ERR!(sys::BLE_SM_ERR_AUTHREQ) => Some("The pairing procedure cannot be performed as authentication requirements cannot be met due to IO capabilities of one or both devices."),
+    SM_US_ERR!(sys::BLE_SM_ERR_CONFIRM_MISMATCH) => Some("The confirm value does not match the calculated compare value."),
+    SM_US_ERR!(sys::BLE_SM_ERR_PAIR_NOT_SUPP) => Some("Pairing is not supported by the device."),
+    SM_US_ERR!(sys::BLE_SM_ERR_ENC_KEY_SZ) => Some("The resultant encryption key size is insufficient for the security requirements of this device."),
+    SM_US_ERR!(sys::BLE_SM_ERR_CMD_NOT_SUPP) => Some("The SMP command received is not supported on this device."),
+    SM_US_ERR!(sys::BLE_SM_ERR_UNSPECIFIED) => Some("Pairing failed due to an unspecified reason."),
+    SM_US_ERR!(sys::BLE_SM_ERR_REPEATED) => Some("Pairing or authentication procedure is disallowed because too little time has elapsed since last pairing request or security request."),
+    SM_US_ERR!(sys::BLE_SM_ERR_INVAL) => Some("The Invalid Parameters error code indicates that the command length is invalid or that a parameter is outside of the specified range."),
+    SM_US_ERR!(sys::BLE_SM_ERR_DHKEY) => Some("Indicates to the remote device that the DHKey Check value received doesn’t match the one calculated by the local device."),
+    SM_US_ERR!(sys::BLE_SM_ERR_NUMCMP) => Some("Indicates that the confirm values in the numeric comparison protocol do not match."),
+    SM_US_ERR!(sys::BLE_SM_ERR_ALREADY) => Some("Indicates that the pairing over the LE transport failed due to a Pairing Request sent over the BR/EDR transport in process."),
+    SM_US_ERR!(sys::BLE_SM_ERR_CROSS_TRANS) => Some("Indicates that the BR/EDR Link Key generated on the BR/EDR transport cannot be used to derive and distribute keys for the LE transport."),
+
+    _ => None,
   }
 }
 
diff --git a/src/lib.rs b/src/lib.rs
index f44cede..6417e98 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -4,6 +4,7 @@
 #![allow(static_mut_refs)]
 #![feature(decl_macro)]
 #![feature(get_mut_unchecked)]
+#![feature(inline_const_pat)]
 #![doc = include_str!("../README.md")]
 
 #[cfg(feature = "std")]