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Index > Macroinstructions > [fasmg, CALM] case insensitive instruction with dot in name

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zhak



Joined: 12 Apr 2005
Posts: 501
Location: Belarus
zhak
How to correctly define a case insensitive instruction which contains a dot in the middle, like A64 "B.<cond> <label>"?
Code:
calminstruction B?.EQ? operands*&
    

gives "Error: illegal instruction" when assembled
Post 29 Apr 2021, 12:31
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Tomasz Grysztar



Joined: 16 Jun 2003
Posts: 7926
Location: Kraków, Poland
Tomasz Grysztar
Dot is the namespace separator, so it is not a definition of instruction called "B.EQ", but a definition of instruction called "EQ" in the "B" namespace. For "B" namespace to be case-insensitive, it needs such symbol to be defined to anchor it:
Code:
define B? ; prepare namespace

calminstruction B.EQ? operands&
end calminstruction    
Note that you also need to avoid having a case-sensitive symbol with the same name, as it would then take precedence:
Code:
B? = 1
B = 2

macro b.EQ?  ; same as: macro B?.EQ?
        display 'I'
end macro

macro B.EQ?  ; this selects the second namespace, because case-sensitive takes precedence
        display 'S'
end macro

B.EQ    ; S
b.eq    ; I
B?.EQ   ; I    
I do not recommend ever having both case-insensitive and case-sensitive variants of the same symbol, but it is worth keeping in mind how it behaves then.
Post 29 Apr 2021, 12:46
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zhak



Joined: 12 Apr 2005
Posts: 501
Location: Belarus
zhak
Ah, I see. I tried wrapping all in "namespace", obviously without success. Thanks a lot!
Post 29 Apr 2021, 13:34
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