[Nasm-bugs] [Bug 3392837] New: expand any %expr used in %warning/%error/%fatal

[noreply-nasm at dev.nasm.us]

https://bugzilla.nasm.us/show_bug.cgi?id=3392837

            Bug ID: 3392837
           Summary: expand any %expr used in %warning/%error/%fatal
           Product: NASM
           Version: new feature request
          Hardware: PC
                OS: Linux
            Status: OPEN
          Severity: normal
          Priority: Medium
         Component: Assembler
          Assignee: nobody at nasm.us
          Reporter: mikar_gibbros at yahoo.com
                CC: chang.seok.bae at intel.com, gorcunov at gmail.com,
                    hpa at zytor.com, nasm-bugs at nasm.us
     Obtained from: From OS distribution

; expand any %expr used in %warning/%error/%fatal

%define expr(=expr1) expr1

dd 0 ; $ - $$ = 4
%ixdefine _size $ - $$ ; preproccesor is able to turn the difference of two
labels into a constant expression
%warning size: _size
%warning size: expr(_size)  ; my workaround macro
%warning size: %expr(_size) ; new feature request
; %warning pointer: expr($) ; error: non-constant expression in parameter 0 of
macro `expr'

; As of version 2.16.01 outputs:

; size: $ - $$
; size: 4
; %expr($ - $$)

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