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| linux:rust [2021/02/14 12:20] – kurt.smolderen@empuly.net | linux:rust [2021/02/14 13:05] (current) – kurt.smolderen@empuly.net |
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| * Scalar types: | * Scalar types: |
| * Integer: Internally represented in 2-components notation when signed (-(2<sup>n</sup> ) → 2<sup>n</sup> -1) | * Integer: Internally represented in 2-components notation when signed (-(2<sup>n</sup> ) -> 2<sup>n</sup> -1) |
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| ^Length^Signed^Unsigned| | ^Length^Signed^Unsigned| |
| |arch|isize|usize| | |arch|isize|usize| |
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| * Floating point: ''f32'', ''f64'' | * Floating point: ''f32'', ''f64'' |
| * Boolean: ''bool'' | * Boolean: ''bool'' |
| * Character: ''char'' | * Character: ''char'' |
| * Compound types | * Compound types |
| * Tuple: Fixed size (defined at declaration), elements may differ in type | * Tuple: Fixed size (defined at declaration), elements may differ in type |
| * ''let tup: (i32, f64, u8) = (500, 6.4, 1);'' | * ''let tup: (i32, f64, u8) = (500, 6.4, 1);'' |
| * Values can be retrieved by either pattern matching: ''let (x, y, z) = tup; // x, y and z are now accessible as variables'' or by using a period ''let x = tup.0;'' | * Values can be retrieved by either pattern matching: ''let (x, y, z) = tup; %%//%% x, y and z are now accessible as variables'' or by using a period ''let x = tup.0;'' |
| * Array: Fixed size, elements should be of the same type | * Array: Fixed size, elements should be of the same type |
| * ''let a = [1, 2, 3];'' | * ''let a = [1, 2, 3];'' |
| * ''let a: [f64; 3] = [1.0, 2.0, 3.0];'' | * ''let a: [f64; 3] = [1.0, 2.0, 3.0];'' |
| * ''let a = [0; 5];'': Creates an array of size 5 with all elements initialized to 0 | * ''let a = [0; 5];'': Creates an array of size 5 with all elements initialized to 0 |
| * ''let first = a[0];'': Accessing elements of array | * ''let first = a[0];'': Accessing elements of array |
| * ''for element in a.iter() { ... }'': Iterates over elements in array | * ''for element in a.iter() { … }'': Iterates over elements in array |
| * Rust panics on index out of bounds situations | * Rust panics on index out of bounds situations |
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| ===== Variables ===== | ===== Variables ===== |
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| * ''let foo = bar;'': Creates immutable variable ''foo'' and assigns it value ''bar''. | * ''let foo = bar;'': Creates immutable variable ''foo'' and assigns it value ''bar''. |
| * ''let mut foo = bar;'': Creates mutable varibale ''foo'' and assigns it value ''bar''. | * ''let mut foo = bar;'': Creates mutable variable ''foo'' and assigns it value ''bar''. |
| * ''let foo: type = false;'': Creates immutable variable ''foo'' with expicit type definition. | * ''let foo: type = false;'': Creates immutable variable ''foo%'' with explicit type definition. |
| ===== Functions ===== | ===== Functions ===== |
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| * ''fn function_name() { ... }'' | * ''fn function_name() { … }'' |
| * ''fn function_name(x: i32, y: char) { ... }'': Parameterized function | * ''fn function_name(x: i32, y: char) { … }'': Parameterized function |
| * ''fn function_name(x: i32) -> i32 { ... }'': Function with return value. Returned value is last evaluated expression of the function body. | * ''fn function_name(x: i32) → i32 { … }'': Function with return value. Returned value is last evaluated expression of the function body. |
| ===== Terminology ===== | ===== Terminology ===== |
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| * Associated function: functione implemented on a type rather than on a particular instance of the type. Similar as a //static method// in Java. | * Associated function: function implemented on a type rather than on a particular instance of the type. Similar as a //static method// in Java. |
| * Destructing: splitting a tuple in individual parts by pattern matching | * Destructing: splitting a tuple in individual parts by pattern matching |
| * Expression: instrictions that evaluate to a resulting value. No semicolon at end of line! | * Expression: instructions that evaluate to a resulting value. No semicolon at end of line! |
| * Macro: | * Macro: |
| * Prelude: | * Prelude: |
kurt.smolderen@empuly.net