TinoDidriksen	{ double x = 4294967296.0; cout << fixed << x; }
geordi	4294967296.000000
TinoDidriksen	Ah, it can hold that precisely.
Baughn	Naturally. It's a power of two.
tomalak	lul.
Baughn	Which also turns the division into a simple subtraction. I wonder if the FPU takes advantage?
armence	So is there any reason the constant won't work if I do it in hex?
TinoDidriksen	armence, hex constants are not double, and C++ doesn't support long long yet.
Baughn	Yeah, laziness on part of the C++ standard writers. :P
armence	TinoDidriksen, OK, I get it
Baughn	It would be nice to have a way of specifying floating-point values directly
Baughn	..hex would pretty much do that
Cecen	Specifying floating-point values directly? :<
Baughn	Or at least making it easier to see how they're translated
Baughn	Base-ten stuff is just awful. :/
Cecen	That seems really unsafe
tomalak	<< ETYPE(0x1.0p0)
geordi	rvalue double
tomalak	<< ETYPE(0x100000000.0p0)
geordi	rvalue double
Baughn	Cecen: Floating-point is standardized. C++ may not require that standard, but it's there anyway.
tomalak	{ double x = 0x100000000.0p0; cout << x; }
tomalak	:)
geordi	4.29497e+09
Eelis	<< numeric_limits<double>::is_iec559
geordi	true
Baughn	..p0?
TinoDidriksen	0th power
tomalak	hexadecimal floating constant exponent suffix
Baughn	Ah
Baughn	That's what I wanted. Guess we /do/ have it. ^^;
Baughn	{ double x = 1p1; cout << x; }
geordi	error: invalid suffix "p1" on integer constant
Baughn	{ double x = 0x1p1; cout << x; }
Eelis	no idea if it's C++1x or just C99
geordi	2
tomalak	Baughn: test in #geordi please
Baughn	Roger.
tomalak	no, tomalak
Action: Baughn punts tomalak over to a barrel of phun
MikeMc68	What is the best way to put a delay into the code? I am looking at 100ms
Baughn	MikeMc68: Platform?
MikeMc68	osx
tomalak	no standard way
tomalak	there are various sleep mechanisms in OS APIs
tomalak	e.g. posix usleep, windows Sleep
tm604	probably one of usleep, microsleep, or nanosleep.
tomalak	ask in the relevant channel for specifics
Baughn	Calling select with no FDs and your timeout is about as portable as it gets
Baughn	..if you want it to work on really ancient stuff
Action: Baughn thinks even windows manages that one
Baughn	MikeMc68: Besides that, usleep.
MikeMc68	ok i'll try usleep - thanks
coldpizza72i	hey
coldpizza72i	http://cimg.sourceforge.net/reference/group__cimg__overview.html ....on the bottom of this page it says you need a quite modern compiler; does this mean code:blocks is not sufficient enough
gparent	code::blocks isn't a compiler.
gparent	problem solved
Cecen	How long until we get uint128_t
coldpizza72i	gparent i mean the compilers that are in code:blocks
gparent	I don't know what compiler is in code::blocks
gparent	it depends on your computer
TinoDidriksen	C::B on Windows uses ooooold MinGW with g++ 3.4.5
coldpizza72i	linux
TinoDidriksen	Then it uses whatever g++ you have
coldpizza72i	o
MikeMc68	ok microsleeo and nanosleep don't work
MikeMc68	usleep does but any number i put in the brackets makes no difference
Action: Cecen reminds everyone that MSVS is the only IDE that should be used on Windows.
coldpizza72i	see im trying to run cimg's helloworld but i get a bunch of build messeges
TinoDidriksen	Cecen, Qt Creator will also do.
Cecen	If you need to sleep, grab Boost.Thread
coldpizza72i	that apear to be problems with the header
gparent	Cecen: I suggest a bed myself.
Cecen	Beds are okay too
Action: Cecen builds Boost.Bed
gparent	rof
gparent	l
alpha	hi
alpha	has anyone tried miniLZO compression lib? i cant find any examples..
TinoDidriksen	alpha, so use a more widely used library.
alpha	TinoDidriksen: for example?
TinoDidriksen	zlib, 7zip
proton23	Hi! sprintf is C, right?
FauxFaux	Yes.
proton23	what is the C++-function for this?
FauxFaux	!give proton23 converting
nolyc	proton23: converting is done with std::stringstream http://www.parashift.com/c++-faq-lite/misc-technical-issues.html#faq-39.1 http://www.parashift.com/c++-faq-lite/misc-technical-issues.html#faq-39.2 or with boost::lexical_cast http://www.boost.org/libs/conversion/lexical_cast.htm
Xorlev	You can use sprintf if you include cstdio.
proton23	ahhh maybe that's the problem
TinoDidriksen	boost::format is also good.
proton23	but shouldn't I get a compiler error without the headerfile?
proton23	Hi Tino! :)
sobber	proton23, In c++ you would usually use std::cout though, instead of printf.
proton23	including cstdio did it
proton23	thanks
deathanatos	If I have template<int I> -- can I restrict that I to < something ?
coppro	deathanatos: you can with enable_if
yuriks	Is there any way to do named constructors with non-copyable objects
yuriks	?
dhrosa	are there such things as unnamed constructors?
yuriks	dhrosa: named constructor idiom =P
chris_	I am trying to learn c++ coming from java, and one place where I am getting hung up is with the stack vs heap
ville	didn't someone already answered this last night
chris_	I am a little confused on how to make an array of objects on the stack
ville	chris_: you can only do it if the number of elements is known at compile time
chris_	ahh... ok
ville	chris_: any C++ book ought to show this.
ville	!give chris_ ac++
nolyc	chris_: Accelerated C++: Practical Programming by Example", Andrew Koenig, Barbara Moo, Addison-Wesley, 2000. ISBN 0-201-70353-X. http://www.acceleratedcpp.com/
chris_	thanks
yuriks	geordi: { Foo init = Foo::makeMe(); } class Foo : noncopyable { Foo& makeMe() { return Foo(); } private: Foo() { } };
geordi	error: expected class-name before '{' token
yuriks	geordi: replace noncopyable by boost::noncopyable
geordi	error: invalid initialization of non-const reference of type 'Foo&' from an rvalue of type 'Foo'
yuriks	ok, this
yuriks	geordi: remove : boost::noncopyable
geordi	Same error.
yuriks	erm, what
TinoDidriksen	geordi: add & after first Foo
geordi	Same error.
TinoDidriksen	geordi: show
geordi	{ Foo& init = Foo::makeMe(); } class Foo  { Foo& makeMe() { return Foo(); } private: Foo() { } };
TinoDidriksen	Oh, it returns a temporary
ville	it would need to be static too or use an instance.
yuriks	oh, right, forgot static
yuriks	geordi: make Foo::makeMe static
geordi	error: Could not find free declaration of Foo::makeMe.
yuriks	bah XD, let's try again
yuriks	geordi: { Foo init = Foo::makeMe(); } class Foo : boost::noncopyable { static Foo& makeMe() { return Foo(); } private: Foo() { } };
geordi	error: invalid initialization of non-const reference of type 'Foo&' from an rvalue of type 'Foo'
yuriks	geordi: remove : boost::noncopyable
geordi	Same error.
yuriks	geordi: show
geordi	{ Foo init = Foo::makeMe(); } class Foo  { static Foo& makeMe() { return Foo(); } private: Foo() { } };
yuriks	so this still isn't working
TinoDidriksen	{ Foo init = Foo::makeMe(); } class Foo  { static Foo makeMe() { return Foo(); } private: Foo() { } };
geordi	error: 'static Foo Foo::makeMe()' is private
TinoDidriksen	{ Foo init = Foo::makeMe(); } struct Foo { static Foo makeMe() { return Foo(); } private: Foo() { } };
geordi	<no output>
jonrafkind	i have 'friend int ::main(int, char**);' inside a class, which itself is inside a namespace, but gcc gives me this error: error: int main(int, char**) should have been declared inside ::
jonrafkind	how am I supposed to declare main as a friend to the class?
TinoDidriksen	jonrafkind, why do you need main to be a friend? That sounds wrong design...
jonrafkind	yea yea I know
jonrafkind	but do you know how to get around it?
jonrafkind	the point is so I can have a singleton where only one instance can be created by main()
TinoDidriksen	...and you want a singleton too!
TinoDidriksen	Double-plus ungood
TinoDidriksen	Anyway, forward declare main()
jonrafkind	ah ok
yuriks	TinoDidriksen: oh, right, I suck at geordi
yuriks	ok, so that works
yuriks	geordi: add `: boost::noncopyable` after `struct Foo`
geordi	error: 'noncopyable_::noncopyable::noncopyable(const noncopyable_::noncopyable&)' is private
yuriks	ok, so yeah, that
yuriks	is there any way to do that?
yuriks	so, is there any way of doing the named constructor idiom with noncopyable objects?
yuriks	(except C++0x move constructors)
fernandes-	geordi: show
geordi	{ Foo init = Foo::makeMe(); } struct Foo: boost::noncopyable { static Foo makeMe() { return Foo(); } private: Foo() { } };
fernandes-	geordi: add & before init
geordi	error: 'noncopyable_::noncopyable::noncopyable(const noncopyable_::noncopyable&)' is private
coppro	yuriks: yes
coppro	use a different type for the named constructor
coppro	oh wait, I see what your issue is :/
coppro	just initialize with (), not =
fernandes-	but it has no def constructor?
yuriks	geordi: { Foo init(Foo::makeMe()); } struct Foo : boost::noncopyable { static Foo makeMe() { return Foo(); } private: Foo() { } };
geordi	Same error.
yuriks	it works in msvc++, atually
fernandes-	it's a copy in either case (= or ()) right?
yuriks	shouldn't it RVO?
ville	the C++ standard requires the thing to be copyable, even if no copy occurs.
yuriks	bah
yuriks	I could return a pointer... but returning a pointer ot a subsystem, meh
yuriks	to*
ville	why do you need to return a pointer? make a facade.
sleepster	is there an easy way to determine whether an ulong to int conversion is going to overflow?
freeone3000	std::numeric_limits<int>::max will give you the maximum value of the int. Compare the current value of the ulong to that.
sleepster	thanks freeone3000
[o	<< std::numeric_limits<int>::max
geordi	0x80486fd
[o	<< std::numeric_limits<int>::max()
geordi	2147483647
[o	<< std::numeric_limits<unsigned>::max()
geordi	4294967295
[o	<< std::numeric_limits<int64_t>::max()
geordi	9223372036854775807
[o	so huge...
d1zzy	and yet so small
Love4Boobies	can anyone explain to me why in http://en.wikipedia.org/wiki/Operator_overloading they define the parameters of the operator with a & at the end?
Terminus	Love4Boobies: because the parameters are references
Love4Boobies	i see. why so?
braden	Love4Boobies: In that case, because it's cheaper than making a copy.
Terminus	Love4Boobies: for objects, it's more efficient to pass a const reference than to make a copy.
Love4Boobies	ah, i didn't know it'd make a copy
Love4Boobies	thanks
Love4Boobies	it's 7:25 AM here btw
braden	Love4Boobies: C passes everything by copy. C++ gives you references.
Love4Boobies	wrong channel
Love4Boobies	yes, i understand now

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