add `explain` subcommand and explanations to all lints

1 files changed, 15 insertions, 0 deletions

diff --git a/bin/src/explain.rs b/bin/src/explain.rs
new file mode 100644
index 0000000..6aefa7e
--- /dev/null
+++ b/bin/src/explain.rs
@@ -0,0 +1,15 @@
+use crate::err::ExplainErr;
+
+use lib::LINTS;
+
+pub fn explain(code: u32) -> Result<&'static str, ExplainErr> {
+    match code {
+        0 => Ok("syntax error"),
+        _ => LINTS
+            .values()
+            .flatten()
+            .find(|l| l.code() == code)
+            .map(|l| l.explanation())
+            .ok_or(ExplainErr::LintNotFound(code)),
+    }
+}