asherman@dino.ulowell.edu (Aaron Sherman) (09/28/90)
I've heard that Ansi supports cpp directives that are NOT at the beginning of a line. How prevelant is this? Do most implimentations these support this ANSIism? Thanks. -AJS -- asherman@dino.ulowell.edu or asherman%cpe@swan.ulowell.edu Note that as of 7/18/90 that's asherman@dino.cpe.ulowell.edu "That that is is that that is not is not is that it it is."
paul@u02.svl.cdc.com (Paul Kohlmiller) (09/29/90)
asherman@dino.ulowell.edu (Aaron Sherman) writes: >I've heard that Ansi supports cpp directives that are NOT at the beginning >of a line. How prevelant is this? Do most implimentations these support this >ANSIism? I think you refer to the ANSI C requirement that whitespace can be used in front of a preprocessor directive. I know of at least one non-ANSI C compiler (mine) that supports this. Paul Kohlmiller
roger@everexn.com (Roger House) (10/02/90)
In <ASHERMAN.90Sep27131220@dino.ulowell.edu> asherman@dino.ulowell.edu (Aaron Sherman) writes: >I've heard that Ansi supports cpp directives that are NOT at the beginning >of a line. How prevelant is this? Do most implimentations these support this >ANSIism? Microsoft C allows whitespace before "#" on preprocessor lines. I find this quite useful for for indenting nested #if, #else, etc. Roger House
jeffb@aquifer.las.uiuc.edu (Jeffrey Biesiadecki) (10/07/90)
asherman@dino.ulowell.edu (Aaron Sherman) writes: >I've heard that Ansi supports cpp directives that are NOT at the beginning >of a line. How prevelant is this? Do most implimentations these support this >ANSIism? I've seen compilers on mainframes that will not accept white space before the #... A safer way to indent cpp directives is to have white space after the #, like: #ifdef TOPLEVEL # define EXTERN /* nothing */ #else # define EXTERN extern #endif Jeff Biesiadecki (jeffb@aquifer.las.uiuc.edu)
amoss@SHUM.HUJI.AC.IL (Amos Shapira) (10/08/90)
rexn.com> Organization: The Hebrew University of Jerusalem, Israel Lines: 19 Apparently-To: post-usenet@ucbvax.berkeley.edu roger@everexn.com (Roger House) writes: >Microsoft C allows whitespace before "#" on preprocessor lines. I find this >quite useful for for indenting nested #if, #else, etc. > Roger House In case you want to do this on a "traditional" pre-processor, it is possible to put white-space between the '#' sign (which stays in the first column) and the rest of the directive, it has the same effect as far as the readability is concerned. Cheers, Amos Shapira, MOSIX System Group, Hebrew University, Jerusalem, Israel #include <std_disclaimer.h>