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Bug Notice DevCpp 4.9.9.0

Started by FrankCashio Nov 8, 2004 at 4:14 PM 5 replies 1k views

Original Post

Nov 8, 2004 at 4:14 PM

IDE: DevCpp 4.9.9.0; Compiler: mingw 3.3.1 I ran across this little bastard while I was working one of my projects


lpProgramMemory = &Memory[(PB*BANK_SIZE) +  PC];
    switch(*lpProgramMemory){  
//////////// ADC Add With Carry  \\\\\\\\\\\\
       case 0x61: // ADC (dp,X)    
	
	 . . // ..

Here


///////////////// Processor Flags  \\\\\\\\\\\\\\\
BOOL bEmulation; // 6502 Emulation mode 8 bit;

And Here


//////////// Internal Registers \\\\\\\\\\\\\\\\\
WORD A;             // the Accumulator

The compiler told me that A, And bEumulation were both undeclared And that case 0x61 was unreachable, all of which were not true The culprit was the \\\ marks in the comments in the code



Won’t Work
//////////// ADC Add With Carry  \\\\\\\\\\\\
       case 0x61: // ADC (dp,X)    

Works 
//////////// ADC Add With Carry 
       case 0x61: // ADC (dp,X)

weird huh? -Frank

SiCrane

Mod

473

SiCrane

Nov 8, 2004 at 4:22 PM

That's not a bug in Dev C++ or MinGW, that's the fault of the programming language. The \ at the end of a line is a line continuation token, which means that if you have a \ at the end of a line, it makes that line part of the line with the \ at the end. That means that if you have a // style comment with a \ at the end of the line, it comments out the next line too.

FrankCashio

Author

FrankCashio

Nov 8, 2004 at 4:28 PM

Wow, That's about the dumbest thing I possible ever heard of.
Why in gods name would anyone ever for any reason think of implementing something like that into a programming language.
It's just asking for trouble.

This world is a sad sad place.

- Frank

SiCrane

Mod

473

SiCrane

Nov 8, 2004 at 4:37 PM

It's one of the things C++ inherited from C, which had only /* */ style comments, so this kind of problem didn't come up. In particular, line continuation characters were designed to support preprocessor macro definitions.

FrankCashio

Author

FrankCashio

Nov 8, 2004 at 4:39 PM

I Know but it's in a comment So it should igonre it. That is in a sane world.

I think it's an over-sight on in the Dev-Cpp IDE a bug.

-Frank

daerid

Nov 8, 2004 at 6:06 PM

Quote:
Original post by FrankCashio
I think it's an over-sight on in the Dev-Cpp IDE a bug.

-Frank

It's not. It's characteristic of the language itself. just don't use those god-awful \\\\\\\\\\\\\\\ comments.

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