std/string

String owns its storage. StringView borrows a range from a string. The automatic prelude already provides StringView, len, at, slice, eq, view, startsWith, and indexOf.

import "std/string" as string;

var source = "hello";
var tail: StringView = slice(source, 1, 4);
println(string.owned(tail));

Import the module for the remaining helpers:

import "std/string" as string;

Functions

Function	Result
stringLen(s: String) Int	Length of an owned string
fromChar(c: Char) String	One-character owned string
pushChar(s: String, c: Char) String	A new string with c appended
owned(v: StringView) String	Copies a view into an owned string
trim(v: StringView) String	Copies the view without surrounding ASCII whitespace
splitOnce(v: StringView, delim: Char) SplitPair	Splits at the first delimiter

SplitPair contains left, right, and found fields.

TextBuf

TextBuf collects text and returns self from push and pushChar:

import "std/string" as string;

fun greeting(name: String) String {
    var buffer = new string.TextBuf();
    buffer.push("Hello, ").push(name).pushChar('!');
    return buffer.build();
}

Methods: clear(), len(), isEmpty(), push(text), pushChar(c), build(), and view().