39 lines
1.2 KiB
Text
39 lines
1.2 KiB
Text
# LLgen: LL(1) parser generator
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# variables: LLGEN, LLFLAGS
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# tool definition for the new version of LLgen that allows for more than
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# one parser in one program. Unfortunately, for historical reasons there
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# is no proper default prefix for LLgen-generated files (LL.output versus
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# Lpars.[ch]). If LLgen would generate LLpars.[ch] instead of Lpars.[ch],
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# we could have a default value for prefix of 'LL', which would make
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# things a bit more simple.
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%instance deftypesuffix(LLgen-src, '%.g') ;
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%include ack-defs.amk;
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%if (%not defined(LLGEN), {
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LLGEN = $EMHOME/bin/LLgen;
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});
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%if (%not defined(LLFLAGS), {
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LLFLAGS = {};
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});
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%tool LLgen (
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verbose: %boolean => %false;
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flags: %string %list => $LLFLAGS;
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prefix: %string => '';
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src: %in %list [type = LLgen-src];
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parser: %out %list [type = C-src]
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=> match($src) + if($prefix == '', Lpars.c, $prefix'pars.c');
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tokens: %out [type = C-incl, compare]
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=> if($prefix == '', Lpars.h, $prefix'pars.h');
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diagn: %out [type = text]
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=> if($prefix == '', LL.output, $prefix.output) %conform $verbose;
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cmd: %in [type = command] => $LLGEN;
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)
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{
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exec($cmd, args => if($verbose, {'-vvv'}, {}) + $flags + $src);
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echo({'LLgen ', $src, ' done'});
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};
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