Std.Test.each

fn

This is a callable function.

What it does

The same check over a table of cases.

Each case answers its own name and its own check, so a table of twenty

inputs is twenty named checks rather than one check that stops at the first

input it dislikes. A failure names the case, which is what makes a table

worth having: the reader is told which row broke.

The name comes from a function rather than a template with holes in it.

A template would be a small unchecked language inside a string — the same

thing [[Std Fmt]] refuses — and a function is checked, can say anything about

the case, and cannot disagree with the case's type.

Read the signature

• The text after the name is the type checked by Pudu.
• Read arrows from left to right: inputs come first, and the final type is returned.
• & borrows a value for this call instead of moving or copying it.
• Names inside [ ] are type arguments, such as the item type held by a collection.