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Index > Main > error: symbol 'size?0' out of scope

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jiangfasm



Joined: 08 Mar 2015
Posts: 60
jiangfasm
;tst.asm
macro tst {
local size
if size
display 'size '
end if
size = 1
; size = 2
if size
display 'size '
end if
}
db 9,9,9
tst

$ fasm hello.asm
flat assembler version 1.71.39 (1048576 kilobytes memory)
size size
2 passes, 3 bytes.

;tst.asm
macro tst {
local size
if size
display 'size '
end if
size = 1
size = 2
if size
display 'size '
end if
}
db 9,9,9
tst

$ fasm hello.asm
flat assembler version 1.71.39 (1048576 kilobytes memory)
size
hello.asm [28]:
tst
hello.asm [18] tst [2]:
if size
error: symbol 'size?0' out of scope.

Who will tell me what is the reason?
Post 12 Jul 2015, 11:50
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17669
Location: In your JS exploiting you and your system
revolution
For a single variable declaration you can forward reference it.

For multiple variable declarations you can only post-reference them.

BTW this is not a macro thing. It is the same when used outside of macros also.
Post 12 Jul 2015, 12:41
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jiangfasm



Joined: 08 Mar 2015
Posts: 60
jiangfasm
revolution wrote:
For a single variable declaration you can forward reference it.

For multiple variable declarations you can only post-reference them.

BTW this is not a macro thing. It is the same when used outside of macros also.




;tst.asm

if size
display 'size '
end if
size = 1
size = 2 ;<---- here

if size
display 'size '
end if

db 9,9,9


$ fasm hello.asm
flat assembler version 1.71.39 (1048576 kilobytes memory)
size
hello.asm [3]:
if size
error: symbol 'size' out of scope.

You are very right! Well I suggest improvements to macros FASM.and always feel with illogical places.
thank revolution!
Post 12 Jul 2015, 13:41
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jiangfasm



Joined: 08 Mar 2015
Posts: 60
jiangfasm
$ fasm hello.asm
flat assembler version 1.71.39 (1048576 kilobytes memory)
size
hello.asm [3]:
if size
error: symbol 'size' out of scope.

I say is improved if statement problem.
Post 12 Jul 2015, 13:47
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jiangfasm



Joined: 08 Mar 2015
Posts: 60
jiangfasm
You are very right! But I suggest improving FASM, and always feel is unreasonable.
Post 12 Jul 2015, 13:57
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17669
Location: In your JS exploiting you and your system
revolution
What is your suggestion for the new message?
Post 12 Jul 2015, 14:31
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jiangfasm



Joined: 08 Mar 2015
Posts: 60
jiangfasm
1. improving the if statement, the following compile:

if size
display 'size '
end if
size = 1
size = 2 ;<---- always feel is unreasonable

if size
display 'size '
end if

db 9,9,9

2. Add a new warning, put the following into other, easy to understand meaning.
error: symbol 'size' out of scope.


have something new in mind, I have news to tell you.
Post 12 Jul 2015, 14:49
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17669
Location: In your JS exploiting you and your system
revolution
This is not an issue with "if". It affects anything that uses the variable before it is defined.
Code:
display size   ;<--- okay
size = '0'    
Compare to:
Code:
display size   ;<--- what value to display?
size = '0'
size = '1'   ;<--- redefined    
Post 12 Jul 2015, 15:23
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jiangfasm



Joined: 08 Mar 2015
Posts: 60
jiangfasm
hank you revolution! I use FASM levels but also improve some!

display size ;<--- what value to display?
size = '0'
size = '1' ;<--- redefined

$ fasm hello.asm
flat assembler version 1.71.39 (1048576 kilobytes memory)

hello.asm [1]:
display size ;<--- what value to display?
error: symbol 'size' out of scope.

thank you so much for your help!
Post 12 Jul 2015, 21:48
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