Michael Schnell schrieb:
IMHO the reason is reusing the variable name, which in C can be
essential with complex macro declarations. You can reintroduce any
variable name in a {-} block without harming the variable with the same
name declared outside and used before and after the block .
ACK.
As the downside a macro can use variables without declarations, so that
the coder is responsible for providing according declarations for every
such macro expansion. That's also a frequently used feature, that can
make C code even more unreadable.
As a midway variables can be passed to C macros, by name, what increases
the compile time considerably. FPC macros don't have parameters, for
this and other reasons. That's not a hard restriction, because inline
procedures can be used instead, in many cases.
DoDi
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