• sclytrack (6/6) Apr 15 2012 this( const size_t step) const
• Trass3r (2/8) Apr 15 2012 Yep.
• Simon (25/38) Apr 15 2012 No it's not:
• sclytrack (6/43) Apr 16 2012 Thanks. That was helpful (no irony). Compiler message was a bit fuzzy.

sclytrack <sclytrack hotmail.com> writes:

	this( const size_t step) const
	{
		this.step = step;
	}


Error: cannot modify const/immutable/inout expression this.step


Is this the expected behavior? Thanks.

Trass3r <un known.com> writes:

Am 15.04.2012, 21:20 Uhr, schrieb sclytrack <sclytrack hotmail.com>:

 	this( const size_t step) const
 	{
 		this.step = step;
 	}


 Error: cannot modify const/immutable/inout expression this.step


 Is this the expected behavior? Thanks.

Yep.

Simon <s.d.hammett gmail.com> writes:

On 15/04/2012 21:07, Trass3r wrote:
 Am 15.04.2012, 21:20 Uhr, schrieb sclytrack <sclytrack hotmail.com>:

 this( const size_t step) const
 {
 this.step = step;
 }


 Error: cannot modify const/immutable/inout expression this.step


 Is this the expected behavior? Thanks.

 Yep.

No it's not:

import std.stdio;

struct foo {
	size_t	_a;

	this(const size_t b) const {
		this._a = b;
	}
}

class bar {
	size_t	_a;

	this(const size_t b) const {
		this._a = b;
	}
}

void main() {
	const a = new foo(42);
	const b = new bar(42);
	writefln("a._a: %d\n", a._a);
	writefln("b._a: %d\n", b._a);
}

works as expected. dmd v2.058

-- 
My enormous talent is exceeded only by my outrageous laziness.
http://www.ssTk.co.uk

sclytrack <sclytrack hotmail.com> writes:

On 04/15/2012 11:04 PM, Simon wrote:
 On 15/04/2012 21:07, Trass3r wrote:
 Am 15.04.2012, 21:20 Uhr, schrieb sclytrack <sclytrack hotmail.com>:

 this( const size_t step) const
 {
 this.step = step;
 }


 Error: cannot modify const/immutable/inout expression this.step


 Is this the expected behavior? Thanks.

 Yep.

 No it's not:

 import std.stdio;

 struct foo {
 size_t _a;

 this(const size_t b) const {
 this._a = b;
 }
 }

 class bar {
 size_t _a;

 this(const size_t b) const {
 this._a = b;
 }
 }

 void main() {
 const a = new foo(42);
 const b = new bar(42);
 writefln("a._a: %d\n", a._a);
 writefln("b._a: %d\n", b._a);
 }

 works as expected. dmd v2.058


Thanks. That was helpful (no irony). Compiler message was a bit fuzzy.

this() const

// Here the const modifies the return type
// While in normal methods it shouldn't.


These "constness baking" seems only to be allowed in constructors.