S0020: min/max require an ordered scalar type

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

Explanation

The built-in min and max functions are defined only for Int, Float, and Char in V1. They rely on a total ordering that arrays, records, enums, strings, and function values do not currently provide.

Common causes

• calling min or max with String values
• calling min or max with arrays or records
• expecting lexicographic ordering for strings

Canonical fixes

• compare an ordered projection instead

Before:

best = max(left_name, right_name)

After:

best_len = max(len(left_name), len(right_name))

• write an explicit match or helper for custom comparison

Code example

best = max(left_name, right_name)

Links

• RellC diagnostic overview