Strings

Vellum has ordinary string literals and interpolated strings.

Ordinary strings

Double-quoted strings are type String:

var greeting = "Hello, World!"

Use the usual escape sequences inside them (for example \", \\).

Interpolated strings

Prefix a string with $ to embed expressions:

import Debug

script Hello : ObjectReference {
    event OnActivate(actor: ObjectReference) {
        for val in [1, 2, 3, 4] {
            Notification($"{val}^2 == {val * val}")
        }
    }
}

Rules:

• Write {expression} for a hole. The expression is any logical-or expression (no assignment).
• Non-String values in holes are cast to String automatically.
• Nested $"..." inside a hole is allowed.
• To put a literal { or } in the text, double it: {{ and }}.
• A lone } in the string text is a compile error.

The whole interpolated string has type String.