crystal.sample in Code Block Pro – Beautiful Syntax Highlighting 1.13.0, at build/shiki/samples/crystal.sample
| 1 | struct Foo(T) |
| 2 | end |
| 3 | |
| 4 | Foo(Int32) |
| 5 | |
| 6 | # --- |
| 7 | struct Foo |
| 8 | end |
| 9 | |
| 10 | # struct Bar < Foo |
| 11 | # end |
| 12 | # Error in ./struct/struct.cr:10: can't extend non-abstract struct Foo |
| 13 | |
| 14 | abstract struct AbstractFoo |
| 15 | end |
| 16 | |
| 17 | struct Bar < AbstractFoo |
| 18 | end |
| 19 | |
| 20 | # --- |
| 21 | struct Test |
| 22 | def initialize(@test : String) |
| 23 | end |
| 24 | end |
| 25 | |
| 26 | Test.new("foo") |
| 27 | |
| 28 | # --- |
| 29 | struct User |
| 30 | property name, age |
| 31 | |
| 32 | def initialize(@name : String, @age : Int32) |
| 33 | end |
| 34 | |
| 35 | def print |
| 36 | puts "#{age} - #{name}" |
| 37 | end |
| 38 | end |
| 39 | |
| 40 | puts User.new("osman", 3).name |
| 41 | User.new("ali", 9).print |
| 42 | |
| 43 | # From https://github.com/askn/crystal-by-example/blob/master/struct/struct.cr |