Print Page - Small error with Types

Title: Small error with Types
Post by: bigsofty on 2011-Mar-16

"sprSheets[]" are an array of advanced types.

using...

Code (glbasic) Select

	LOCAL ss AS TSprSheet
	DIMPUSH self.sprSheets[], ss
	self.sprSheets[-1].create("sprites1.png") // .Create

causes...

Code (glbasic) Select


precompiling:
GPC - GLBasic Precompiler V.7.861 SN:114ddfeb - 3D, NET
"..\LIBS\sprites_lib.gbas"(528) error : call to undefined function : TSprSheet

Changing...

Code (glbasic) Select

self.sprSheets[-1].create("sprites1.png")
to...

Code (glbasic) Select

self.sprSheets[LEN(self.sprSheets[])-1].create("sprites1.png")
produces the same error.

but removing the "-1"(self.sprSheets[LEN(self.sprSheets[])].create("sprites1.png")), it compiles fine but is of no use.

Using...

Code (glbasic) Select

	LOCAL L = LEN(self.sprSheets[])-1
	self.sprSheets[L].create("sprites1.png")

...works, but is not as neat. Oh, and BOUNDS does not work either(When the LEN is swapped for it).

Cheers,

Ian

Full lib, as it is...

Code (glbasic) Select

// Spr Sheet Type

TYPE TSprSheet
	name$	// Filename
	sprnum%	// GLB Sprnum holding texture
	w%		// Width
	h%		// Height
	tw%		// Tile Width
	th%		// Tile Height
	trn%	// Has alpha layer

	FUNCTION create: filename$, tileW%=0, tileH%=0
		LOCAL s% = GENSPRITE()
		LOADSPRITE filename$, s%
		self.name$ = filename$
		self.sprnum% = s%
		GETSPRITESIZE s%, self.w%, self.h%
		ASSERT ((self.w% = 0) OR (self.w% = 0)) // File not open!
		self.tw% = tileW%
		self.th% = tileH%
		ENDFUNCTION
	ENDTYPE



TYPE TSprBank
	sprSheets[] AS TSprSheet

	FUNCTION blah:
		LOCAL ss AS TSprSheet
		DIMPUSH self.sprSheets[], ss
		self.sprSheets[-1].create("sprites1.png") // .Create
		///... stopped coding here.
		ENDFUNCTION

ENDTYPE

Title: Re: Small error with Types
Post by: Kitty Hello on 2011-Mar-16

Poor GPC compiler. Feed with stuff he can't digest. Pre-chew it, please:

Code (glbasic) Select


ALIAS lastsheet AS self.sprSheets[-1]
lastsheet.create("sprites1.png") // .Create

The GPC sometimes has a hard time with complex expressions to find the resulting type. If you ALIAS a part of of, usually it gets the grip and works.

Title: Re: Small error with Types
Post by: bigsofty on 2011-Mar-16

Thanks for that culinary suggestion there Gernot! ;)

I'm not sure I want to use ALIAS as the final Type will have lots of methods within it and it could get a bit messy if I have to ALIAS a lot in the parent code.

I'll have a rethink, thanks any ways.

Ian

Title: Re: Small error with Types
Post by: bigsofty on 2011-Mar-16

This works...

Code (glbasic) Select

	global lastOne% = -1
	...
	self.sprSheets[lastOne].create("sprites1.png") // .Create

Hehe, looks a little weird but feels better.

Cheers,

Ian

Title: Re: Small error with Types
Post by: MrTAToad on 2011-Mar-17

GPC must have taken offense to literal integers:)

Title: Re: Small error with Types
Post by: Kitty Hello on 2011-Mar-17

try constant instead of global. a tad faster.

Title: Re: Small error with Types
Post by: bigsofty on 2011-Mar-17

It is? Nice tip, thanks!

Cheers,

Ian

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Main forum => Bug Reports => Topic started by: bigsofty on 2011-Mar-16