String Interpolation

Opt-in with a $ prefix; ${ ... } slots splice evaluated expressions into the string.

§ 1Interpolation

Interpolation is opt-in: prefix the string literal with $. Inside a $"..." (or $<<TAG), ${ ... } slots evaluate any expression and splice the result into the string. Without the prefix ${...} is literal text. All four encodings accept the $ prefix.

wcl

greeting = $"Hello, ${name}! Count: ${count + 1u32}"

block = $<<MSG
You have ${len(items)} items waiting.
The first is ${head(items)}.
MSG