59 wiersze
1.8 KiB
Rust
59 wiersze
1.8 KiB
Rust
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//-- #########################
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//-- Task: To create a sample module to illustrating `self` and `super`
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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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fn sample_function() {
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println!("called `sample_function()`");
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}
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// Defined a module names cool
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mod cool {
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pub fn sample_function() {
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println!("called `cool::sample_function()` \n");
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}
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}
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mod sample_mod {
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fn sample_function() {
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println!("called `sample_mod::sample_function()` \n");
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}
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mod cool {
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pub fn sample_function() {
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println!("called `sample_mod::cool::sample_function()` \n");
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}
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}
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pub fn indirect_call() {
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// Let's access all the sample_functions named `sample_function` from this scope!
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print!("called `sample_mod::indirect_call()`, that\n> ");
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// The `self` keyword refers to the current module scope - in this case `sample_mod`.
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// Calling `self::sample_function()` and calling `sample_function()` directly both give
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// the same result, because they refer to the same sample_function.
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self::sample_function();
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sample_function();
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// We can also use `self` to access another module inside `sample_mod`:
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self::cool::sample_function();
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// The `super` keyword refers to the parent scope (outside the `sample_mod` module).
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super::sample_function();
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// This will bind to the `cool::sample_function` in the *crate* scope.
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// In this case the crate scope is the outermost scope.
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{
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use cool::sample_function as root_sample_function;
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root_sample_function();
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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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// Calling the sample_mod module's item
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sample_mod::indirect_call();
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}
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