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POImplicit Type Conversion for PHP Classes?
 

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  1. POImplicit Type Conversion for PHP Classes?
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    <p>Is there a way to tell the php complier that I want a specific implicit conversion from one type to another?</p> <p>A simple example:</p> <pre><code>class Integer { public $val; } function ExampleFunc(Interger $i){...} ExamFunc(333); // 333 -&gt; Integer object with $val == 333. </code></pre> <p>[edit]... someone asked for an example. Here's an example from c#. This is a boolean type that changes value after it has been accessed once. </p> <pre><code> /// &lt;summary&gt; /// A Heisenberg style boolean that changes after it has been read. Defaults to false. /// &lt;/summary&gt; public class hbool { private bool value; private bool changed = false; public hbool() { value = false; } public hbool(bool value) { this.value = value; } public static implicit operator bool(hbool item) { return item.Value; } public static implicit operator hbool(bool item) { return new hbool(item); } public bool Value { get { if (!changed) { value = !value; changed = true; return !value; } return value; } } public void TouchValue() { bool value1 = Value; } public static hbool False { get { return new hbool(); } } public static hbool True { get { return new hbool(true); } } } [Test] public void hboolShouldChangeAfterRead() { hbool b = false; Assert.IsFalse(b); Assert.IsTrue(b); Assert.IsTrue(b); hbool b1 = false; Assert.IsFalse(b1); Assert.IsTrue(b1); Assert.IsTrue(b1); hbool b2 = true; Assert.IsTrue(b2); Assert.IsFalse(b2); Assert.IsFalse(b2); bool b3 = new hbool(); Assert.IsFalse(b3); Assert.IsFalse(b3); Assert.IsFalse(b3); } </code></pre>
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    1. USWill Shaver
    1. USWill Shaver
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    1. COspecific implicit, wouldn't that be explicit?
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      1. USMalfist
    2. COnot really. Explicit is when you do something like: ExamFunc((Integer) 333) in C# you have the implicit operator: class MyType { public static implicit operator int(MyType m) { // code to convert from MyType to int } } http://msdn.microsoft.com/en-us/library/z5z9kes2(VS.71).aspx
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      1. POImplicit Type Conversion for PHP Classes?
      1. USWill Shaver
    3. COaren't you mixing concepts here? I dont know C# but it seems the code you're refering to creates an operator to convert from one type to another but it is automatic in php, you dont need to create a way to convert, say, from string to int..
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      1. POImplicit Type Conversion for PHP Classes?
      1. USCarlos Lima
 

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