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https://github.com/netwide-assembler/nasm.git
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e91f5cc132
Macro aliases can legitimately point to nonexistent macros. Furthermore, %undef should remove the pointed-at macro, not the alias. This led to an infinite loop in the existing code; fix that. Add an %ifdefalias directive to test for the existence of an alias. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
53 lines
941 B
NASM
53 lines
941 B
NASM
%defalias foo bar
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%ifdef foo
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%error "foo should not be defined here!"
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%endif
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%define foo 33
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%ifndef foo
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%error "foo should be defined here!"
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%endif
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%ifndef bar
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%error "bar should be defined here!"
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%endif
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%if bar != 33
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%error "bar should have the value 33 here"
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%endif
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%define bar 34
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%if foo != 34
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%error "foo should have the value 34 here"
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%endif
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%undef foo
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%ifdef foo
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%error "foo should not be defined here!"
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%endif
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%ifdef bar
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%error "bar should not be defined here!"
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%endif
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%ifndefalias foo
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%error "foo was removed as an alias!"
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%endif
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%define bar 35
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%if foo != 35
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%error "foo should have the value 35 here"
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%endif
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%define foo 36
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%if bar != 36
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%error "bar should have the value 36 here"
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%endif
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%undefalias foo
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%ifdef foo
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%error "foo is still defined after %undefalias"
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%elifdefalias foo
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%error "foo is undefined, but still an alias"
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%endif
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%ifndef bar
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%error "bar disappeared after %undefalias foo"
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%endif
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