diff options
| author | c | 2023-12-05 13:14:50 -0500 |
|---|---|---|
| committer | c | 2023-12-05 13:14:50 -0500 |
| commit | 4d41b1186f3dc721102cd1d9e47dde233f7b1e40 (patch) | |
| tree | e7a715570d3c13ba041cb08f722ed65d009ede5f /examples/preprocessor.halk | |
| parent | a75b474bf153388e39c31b072a4bf0d49190cc5b (diff) | |
Updated examples.
Diffstat (limited to 'examples/preprocessor.halk')
| -rw-r--r-- | examples/preprocessor.halk | 38 |
1 files changed, 21 insertions, 17 deletions
diff --git a/examples/preprocessor.halk b/examples/preprocessor.halk index 9e3f6b5..e755ca2 100644 --- a/examples/preprocessor.halk +++ b/examples/preprocessor.halk @@ -1,29 +1,33 @@ ` - #def# #ID# [#VALUE#] set a macro - #fed# #ID# unset a macro + Preprocessor directive types: + + #FOO# Call a macro or function. + #=BAR# A string that can be stored by a macro. - #cde# #VALUE# leave code as is + #def# #ID# [#=VALUE#] Set a macro. + #fed# #ID# Unset a macro. - #ddo# #ID?# #DIR# if defined, do #DIR# (Defined DO) - #udo# #ID?# #DIR# if undefined, do #DIR# (UnDefined Do) + #dex# #ID?# ... #xed# If macro ID is defined, expand to ... (Defined EXpand). + #uex# #ID?# ... #xeu# If macro ID is undefined, expand to ... (Undefined EXpand). - #inc# #FPATH# include a file + #inc# #FILE# Include a file; first searches cwd, then some kind of $HALKPATH. - #ID# call a macro + #ID# Call a macro. ` -` example usage: ` +` Example usage: ` -#def# #VERSION# #"31.4.1"# +` Simple header guard. ` +#uex# #TEST# +#def# #TEST# -#ddo# #BSD# #inc# #bsd_support.halk# +#inc# #io# +#inc# #packet.hlk# -#udo# #OS# # - some_error_func."os not specified"; -# +#def# #VERSION# #= 3.14.1 # +#def# #ERR# #= {io!print."Error D:"; die;} # -#def# #OSTYPE# # - os/shell."sysctl kernel.ostype" -# +:packet_t:p = packet!get; +?.(~=.p!version,#VERSION#),#ERR#; ` Throw error if versions do not match. ` -stdio/pln.#OSTYPE# +#xeu# |