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Diffstat (limited to 'doc/nasmdoc.src')
| -rw-r--r-- | doc/nasmdoc.src | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/nasmdoc.src b/doc/nasmdoc.src index e5d54881..722f0991 100644 --- a/doc/nasmdoc.src +++ b/doc/nasmdoc.src @@ -3149,6 +3149,15 @@ any tokens at all, whitespace excepted. The usual \i\c{%elifempty}, \i\c\{%ifnempty}, and \i\c{%elifnempty} variants are also provided. +\S{ifenv} \i\c{%ifenv}: Test If Environment Variable Exists + +The conditional assembly construct \c{%ifenv} assembles the +subsequent code if and only if the environment variable referenced by +the \c{%!<env>} directive exists. + +The usual \i\c{%elifenv}, \i\c\{%ifnenv}, and \i\c{%elifnenv} +variants are also provided. + \H{rep} \i{Preprocessor Loops}\I{repeating code}: \i\c{%rep} NASM's \c{TIMES} prefix, though useful, cannot be used to invoke a |