1 files changed, 38 insertions, 0 deletions
diff --git a/cli/npm/semver/errors.rs b/cli/npm/semver/errors.rs
new file mode 100644
index 000000000..530d73c55
--- /dev/null
+++ b/cli/npm/semver/errors.rs
@@ -0,0 +1,38 @@
+// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
+
+use deno_core::anyhow::bail;
+use deno_core::error::AnyError;
+use monch::ParseError;
+use monch::ParseErrorFailure;
+use monch::ParseResult;
+
+pub fn with_failure_handling<'a, T>(
+  combinator: impl Fn(&'a str) -> ParseResult<T>,
+) -> impl Fn(&'a str) -> Result<T, AnyError> {
+  move |input| match combinator(input) {
+    Ok((input, result)) => {
+      if !input.is_empty() {
+        error_for_failure(fail_for_trailing_input(input))
+      } else {
+        Ok(result)
+      }
+    }
+    Err(ParseError::Backtrace) => {
+      error_for_failure(fail_for_trailing_input(input))
+    }
+    Err(ParseError::Failure(e)) => error_for_failure(e),
+  }
+}
+
+fn error_for_failure<T>(e: ParseErrorFailure) -> Result<T, AnyError> {
+  bail!(
+    "{}\n  {}\n  ~",
+    e.message,
+    // truncate the output to prevent wrapping in the console
+    e.input.chars().take(60).collect::<String>()
+  )
+}
+
+fn fail_for_trailing_input(input: &str) -> ParseErrorFailure {
+  ParseErrorFailure::new(input, "Unexpected character.")
+}