Compiler/Simple file inclusion pre processor: Difference between revisions
Compiler/Simple file inclusion pre processor (view source)
Revision as of 16:05, 22 July 2022
, 1 year agoJ
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} # includeFile</lang>
=={{header|J}}==
Preprocessing is a task which, if used at all, would more likely be tackled in J through monkey-patching (wrapping library definitions for names, overriding their prior definition).
Instead, here, we handle literal statements of the form <code>load'script references'</code> where 'load' appears at the beginning of the line (not indented) and 'script references' is a literal string, and nothing else appears on the line, and replace those lines with the content of the referenced script(s).
This approach is not recursive (and while it seems to offer little advantage over the native implementation of 'load', it does support 'load' inside multi-line string constants, as long as the reference(s) to the content being loaded would be supportable as a J script reference).
<lang J>preproc=: {{
lines=. <;.2 LF,~CR-.~fread y
for_ndx. |.I.'load'-:"1 (4&{.@>) lines do.
line=. ndx{::lines
try. parse=. ;:line catch. continue. end.
if. 3~:#parse do. continue. end.
if. (<'load')~:{.parse do. continue. end.
if. ''''~:(1;0){::parse do. continue. end.
lines=. lines ndx}~ <;fread each getscripts_j_ ".1{::parse
end.
0!:0;lines
}}</lang>
=={{header|Julia}}==
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