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more doc/example tweaks

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Justin Donaldson 2013-08-22 10:58:46 -07:00
parent 078cbd3299
commit cd723d1245
1 changed files with 20 additions and 15 deletions
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@ -650,27 +650,32 @@ class ComplexEnumTest{
class TypedefsAndStructuralTypes { class TypedefsAndStructuralTypes {
public static function example(){ public static function example(){
// Here we're going to use typedef types, instead of base types. /*
Here we're going to use typedef types, instead of base types.
At the top we've declared the type "FooString" to mean a "String" type.
*/
var t1:FooString = "some string"; var t1:FooString = "some string";
/* /*
We can use typedefs for "structural types". These types are defined We can use typedefs for "structural types" as well. These types are
by their field structure, not by class inheritance. Here's an defined by their field structure, not by class inheritance. Here's
anonymous object with a String field named "foo": an anonymous object with a String field named "foo":
*/ */
var fooObj = { foo: 'hi' }; var anon_obj = { foo: 'hi' };
/* /*
Remember back at the top where we declared the FooObj typedef? The anon_obj variable doesn't have a type declared, and is an
Since fooObj matches that structure, we can use it anywhere that anonymous object according to the compiler. However, remember back at
a "FooObject" is expected. the top where we declared the FooObj typedef? Since anon_obj matches
that structure, we can use it anywhere that a "FooObject" type is
expected.
*/ */
var f = function(fo:FooObject){ var f = function(fo:FooObject){
trace('$fo was passed in to this function'); trace('$fo was passed in to this function');
} }
f(fooObj); // call the FooObject signature function with fooObj. f(anon_obj); // call the FooObject signature function with anon_obj.
/* /*
Note that typedefs can have optional fields as well, marked with "?" Note that typedefs can have optional fields as well, marked with "?"