37 lines
885 B
Plaintext
37 lines
885 B
Plaintext
WHITESPACE = _{ " " }
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Rew = ! { ( ASCII_DIGIT | ASCII_ALPHA_UPPER | "_" | "-" ) + }
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Lit = ! { ( ASCII_ALPHANUMERIC | "_" | "-" ) + }
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Word = _ { Rew | Lit }
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WordGroup = _ { Word ~ ( " " ~ Word ) * }
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// Argument groups are nonatomic;
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// "<whitespace |between|the|bar|or|braces |is | OK>"
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ArgOptChoiceGroup = { ( "[" ~ Word + ~
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( "|" ~ ( Word
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| ArgChoiceGroup ) + ) * ~
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"]" ) + }
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ArgReqChoiceGroup = { ( "<" ~ Word + ~
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( "|" ~ ( Word
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| ArgChoiceGroup ) + ) * ~
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">" ) + }
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ArgChoiceGroup = _ { ArgOptChoiceGroup
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| ArgReqChoiceGroup }
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Command = {
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( WordGroup ) ~
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( ArgChoiceGroup ) *
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}
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HelpMenu = {
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SOI ~
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(
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Command ~
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NEWLINE
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) * ~
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EOI
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}
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