string.ts

import "allocator/arena";

// preliminary

var str: string = "hi, I'm a string";
var nullStr: string;

// exactly once in static memory
assert(changetype<usize>(str) == changetype<usize>("hi, I'm a string"));

assert(str.length == 16);
assert(str.charCodeAt(0) == 0x68);
assert(str.startsWith("hi"));
assert(str.endsWith("string"));
assert(str.includes("I'm"));
assert(str.indexOf(",") == 2);
assert(str.indexOf("x") == -1);

export function getString(): string {
  return str;
}

assert(parseInt("0") == 0);
assert(parseInt("1") == 1);
assert(parseInt("0b101") == 0b101);
assert(parseInt("0o707") == 0o707);
assert(parseInt("0xf0f") == 0xf0f);
assert(parseInt("0xF0F") == 0xf0f);
assert(parseInt("011") == 11); // not octal
assert(parseInt("0x1g") == 1); // not valid

assert(parseFloat("0") == 0);
assert(parseFloat("1") == 1);
assert(parseFloat("0.1") == 0.1);
assert(parseFloat(".25") == 0.25);
assert(parseFloat(".1foobar") == 0.1);

var c = "a" + "b";
assert(c == "ab");
assert(c != "a");
assert("" == "");
assert("" != nullStr);

assert("b" > "a");
assert("ba" > "a");
assert("ba" >= "aa");
assert("ba" > "ab");
assert(!("ba" < "ab"));

assert(!("b" < nullStr));
assert(!(nullStr < "b"));

assert("abc" > "");
assert("" < "abc");
assert("abc" >= "");
assert("" <= "abc");
assert(!("abc" < ""));
assert(!("" > "abc"));
assert(!("" < ""));
assert(!("" > ""));
assert("" >= "");
assert("" <= "");

assert("123".length == 3);

assert("".repeat(100) == "");
assert("a".repeat() == "");
assert("a".repeat(1) == "a");
assert("a".repeat(2) == "aa");
assert("a".repeat(3) == "aaa");
assert("ab".repeat(4) == "abababab");
assert("a".repeat(5) == "aaaaa");
assert("a".repeat(6) == "aaaaaa");
assert("a".repeat(7) == "aaaaaaa");