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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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23
haxe.html.markdown
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@ -650,27 +650,32 @@ class ComplexEnumTest{
class TypedefsAndStructuralTypes {
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";
/*
We can use typedefs for "structural types". These types are defined
by their field structure, not by class inheritance. Here's an
anonymous object with a String field named "foo":
We can use typedefs for "structural types" as well. These types are
defined by their field structure, not by class inheritance. Here's
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?
Since fooObj matches that structure, we can use it anywhere that
a "FooObject" is expected.
The anon_obj variable doesn't have a type declared, and is an
anonymous object according to the compiler. However, remember back at
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){
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 "?"