ton/tolk-tester/tests/invalid-mutate-9.tolk

fun increment(self: int) {
    self = self + 1;
}

/**
@compilation_should_fail
@stderr modifying `self` (left side of assignment), which is immutable by default
@stderr probably, you want to declare `mutate self`
 */
[Tolk] Get rid of ~tilda with `mutate` and `self` methods This is a very big change. If FunC has `.methods()` and `~methods()`, Tolk has only dot, one and only way to call a `.method()`. A method may mutate an object, or may not. It's a behavioral and semantic difference from FunC. - `cs.loadInt(32)` modifies a slice and returns an integer - `b.storeInt(x, 32)` modifies a builder - `b = b.storeInt()` also works, since it not only modifies, but returns - chained methods also work, they return `self` - everything works exactly as expected, similar to JS - no runtime overhead, exactly same Fift instructions - custom methods are created with ease - tilda `~` does not exist in Tolk at all 2024-10-31 07:18:54 +00:00			`fun increment(self: int) {`
			`self = self + 1;`
			`}`

			`/**`
			`@compilation_should_fail`
			@stderr modifying `self` (left side of assignment), which is immutable by default
			@stderr probably, you want to declare `mutate self`
			`*/`