fullAssignDestructureComponents

fn fullAssignDestructureComponents(tree: Ast, info: full.AssignDestructure.Components) full.AssignDestructure {
    var result: full.AssignDestructure = .{
        .comptime_token = null,
        .ast = info,
    };
    const first_variable_token = tree.firstToken(info.variables[0]);
    const maybe_comptime_token = switch (tree.nodeTag(info.variables[0])) {
        .global_var_decl,
        .local_var_decl,
        .aligned_var_decl,
        .simple_var_decl,
        => first_variable_token,
        else => first_variable_token - 1,
    };
    if (tree.tokenTag(maybe_comptime_token) == .keyword_comptime) {
        result.comptime_token = maybe_comptime_token;
    }
    return result;
}