Flat directory/module structure

src/export/json.rs

@@ -0,0 +1,27 @@
+use super::Exporter;
+use crate::benchmark_result::BenchmarkResult;
+use crate::units::Unit;
+
+use std::io::{Error, ErrorKind, Result};
+
+use serde::*;
+use serde_json::to_vec_pretty;
+
+#[derive(Serialize, Debug)]
+struct HyperfineSummary<'a> {
+    results: &'a [BenchmarkResult],
+}
+
+#[derive(Default)]
+pub struct JsonExporter {}
+
+impl Exporter for JsonExporter {
+    fn serialize(&self, results: &[BenchmarkResult], _unit: Option<Unit>) -> Result<Vec<u8>> {
+        let mut output = to_vec_pretty(&HyperfineSummary { results });
+        for content in output.iter_mut() {
+            content.push(b'\n');
+        }
+
+        output.map_err(|e| Error::new(ErrorKind::Other, e))
+    }
+}