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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
//! Helper macros for implementing the FFI API for metric types.
/// Get a metric object by ID from the corresponding map.
///
/// # Arguments
///
/// * `$map` - The name of the hash map within `metrics::__glean_metric_maps`
/// as generated by glean_parser.
/// * `$id` - The ID of the metric to get.
macro_rules! metric_get {
($map:ident, $id:ident) => {
match $crate::metrics::__glean_metric_maps::$map.get(&$id.into()) {
Some(metric) => metric,
None => panic!("No metric for id {}", $id),
}
};
}
/// Test whether a value is stored for the metric identified by its ID.
///
/// # Arguments
///
/// * `$map` - The name of the hash map within `metrics::__glean_metric_maps`
/// as generated by glean_parser.
/// * `$id` - The ID of the metric to get.
/// * `$storage` - the storage name to look into.
macro_rules! test_has {
($map:ident, $id:ident, $storage:ident) => {{
let metric = metric_get!($map, $id);
let storage = if $storage.is_empty() {
None
} else {
Some($storage.to_utf8())
};
metric.test_get_value(storage.as_deref()).is_some()
}};
}
/// Get the currently stored value for the metric identified by its ID.
///
/// # Arguments
///
/// * `$map` - The name of the hash map within `metrics::__glean_metric_maps`
/// as generated by glean_parser.
/// * `$id` - The ID of the metric to get.
/// * `$storage` - the storage name to look into.
macro_rules! test_get {
($map:ident, $id:ident, $storage:ident) => {{
let metric = metric_get!($map, $id);
let storage = if $storage.is_empty() {
None
} else {
Some($storage.to_utf8())
};
metric.test_get_value(storage.as_deref()).unwrap()
}};
}
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