parseString

    fn parseString(self: *@This(), T: type, node: Zoir.Node.Index) ParseExprInnerError!T {
        const ast_node = node.getAstNode(self.zoir);
        const pointer = @typeInfo(T).pointer;
        var size_hint = ZonGen.strLitSizeHint(self.ast, ast_node);
        if (pointer.sentinel() != null) size_hint += 1;

        var aw: std.Io.Writer.Allocating = .init(self.gpa);
        try aw.ensureUnusedCapacity(size_hint);
        defer aw.deinit();
        const result = ZonGen.parseStrLit(self.ast, ast_node, &aw.writer) catch return error.OutOfMemory;
        switch (result) {
            .success => {},
            .failure => |err| {
                const token = self.ast.nodeMainToken(ast_node);
                const raw_string = self.ast.tokenSlice(token);
                return self.failTokenFmt(token, @intCast(err.offset()), "{f}", .{err.fmt(raw_string)});
            },
        }

        if (pointer.child != u8 or
            pointer.size != .slice or
            !pointer.attrs.@"const" or
            (pointer.sentinel() != null and pointer.sentinel() != 0) or
            (pointer.attrs.@"align" != null and pointer.attrs.@"align" != 1))
        {
            return error.WrongType;
        }

        if (pointer.sentinel() != null) {
            return aw.toOwnedSliceSentinel(0);
        } else {
            return aw.toOwnedSlice();
        }
    }