E1006: expected pattern

Generated from rellum-diagnostics/src/db.rs.

Explanation

Match arms that destructure values must start with a supported pattern form, such as _, none, some(...), ok(...), err(...), a literal, a record pattern, or an enum variant pattern.

Common causes

• leaving a match arm head empty
• using expression syntax where a pattern is required
• starting a pattern with an unsupported token

Canonical fixes

• write a valid pattern before =>

Before:

match value
    => value

After:

match value
    _ => value

• use a guard arm when the condition is an expression

Code example

match value
    => value

Links

• RellC diagnostic overview