On 05/31/2011 09:38 AM, wu liang wrote: > Sir, > In the chapter 5, there is example as: > －－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－ > define(`foo’, `This is macro `foo’.’) > The ‘foo’ in the expansion text is not expanded, since it is a quoted > string, and not a name. > －－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－ > However, according to my test, this will cause infinite loop of > printing. I think that each 'foo' will be expanded and whether it is > quoted only affects when it is expanded.
Thanks for the report. However, I think the manual is correct as is, given my simple test (not to mention that 'make check' runs all the examples in the manual, and has not detected any problems with this example): $ m4 <<\EOF > define(`foo',`This is macro `foo'.') > foo > EOF This is macro foo. $ Please show your particular test to back up your claim; most likely, the bug is in your test setup and not in m4 or in the manual. Did you perhaps use changequote to some other quote characters before trying the define? Does using 'm4 -deaqt' give any more insight into the infinite loop (warning, that can produce a lot of output on anything larger than a trivial test)? -- Eric Blake ebl...@redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org
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