52 wiersze
1.7 KiB
Rust
52 wiersze
1.7 KiB
Rust
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//-- #########################
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//-- Task: To create a sample nested_mod module
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//-- Author: Vigneshwer.D
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//-- Version: 1.0.0
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//-- Date: 4 March 17
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//-- #########################
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// Sample module which has struct item
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mod sample_struct {
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// A public struct with a public field of generic type `T`
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pub struct WhiteBox<T> {
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pub information: T,
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}
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// A public struct with a private field of generic type `T`
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#[allow(dead_code)]
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pub struct BlackBox<T> {
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information: T,
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}
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impl<T> BlackBox<T> {
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// A public constructor method
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pub fn const_new(information: T) -> BlackBox<T> {
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BlackBox {
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information: information,
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}
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}
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}
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}
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// Execution starts here
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fn main() {
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// Public structs with public fields can be constructed as usual
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let white_box = sample_struct::WhiteBox { information: "public information \n" };
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// and their fields can be normally accessed.
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println!("The white box contains: {} \n", white_box.information);
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// Public structs with private fields cannot be constructed using field names.
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// Error! `BlackBox` has private fields
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//let black_box = sample_struct::BlackBox { information: "classified information" };
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// TODO ^ Try uncommenting this line
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// However, structs with private fields can be created using
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// public constructors
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let _black_box = sample_struct::BlackBox::const_new("classified information \n");
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// and the private fields of a public struct cannot be accessed.
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// Error! The `information` field is private
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//println!("The black box contains: {}", _black_box.information);
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// TODO ^ Try uncommenting this line
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}
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