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326e5c640d
Estimated hours taken: 1 Corrected a bug in moose whereby it failed to return a non-zero exit code when a critical error occured. Converted moose to modern syntax with regard to DCGs and State Variables and module delimters such as '__' vs '.'. Converted some indentation to four spaces. extras/moose/check.m: extras/moose/grammar.m: extras/moose/lalr.m: extras/moose/mercury_syntax.m: extras/moose/misc.m: extras/moose/moose.m: extras/moose/options.m: extras/moose/tables.m: As above. extras/moose/BUGS Noted a new bug. extras/moose/TODO Corrected a spelling mistake.
39 lines
1.5 KiB
Plaintext
39 lines
1.5 KiB
Plaintext
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Copyright (C) 2009 The University of Melbourne
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Doesn't handle epsilon productions properly -- throws an exception
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when computing the action table:
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Uncaught Mercury exception:
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Software Error: map__lookup: key not found
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Key Type: grammar.symbol
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Key Functor: terminal/1
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Value Type: list.list(lalr.item)
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Stack dump follows:
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0 pred exception.throw/1-0 (erroneous) (exception.m:304)
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1 pred require.error/1-0 (erroneous) (require.m:101)
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2 pred require.report_lookup_error/3-0 (erroneous) (require.m:89)
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3 pred map.lookup/3-0 (det) (map.m:469)
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4 pred tables.IntroducedFrom__pred__actions2__119__6/8-0 (det) (tables.m:121)
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5 2* pred list.foldl2/6-0 (det) (list.m:1356 and others)
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7 pred tables.actions2/12-0 (det) (tables.m:119)
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8 pred tables.actions1/10-0 (det) (tables.m:91)
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9 pred tables.actions/8-0 (det) (tables.m:72)
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10 pred moose.process_2/8-0 (det) (moose.m:200)
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11 pred moose.process/3-0 (det) (moose.m:133)
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12 pred moose.main2/4-0 (det) (moose.m:59)
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13 pred moose.main/2-0 (det) (moose.m:36)
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Doesn't give good error messages if :- action is used but the rule
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doesn't exist.
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Doesn't give good error messages for misplaced semicolons.
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:- rule init_declarator(init_declarator).
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init_declarator(init_declarator(D, Init)) --->
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declarator(D) ; { Init = no }.
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If there is some error in the grammar moose will write an empty or broken .m
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file. This may be a problem in some cases.
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