34 lines
1.8 KiB
Plaintext
34 lines
1.8 KiB
Plaintext
#!/usr/bin/env janet
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(def to-ast
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"A custom markdown flavored grammar"
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~{
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:end-of-line (* (? "\r") "\n")
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:single-line-comment (cmt (<- (* (+ "//" "#") (some (if-not :end-of-line 1)))),|[:single-line-comment (string/join $&)])
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:multi-line-comment (cmt (<- (* "/*" (some (if-not "*/" 1)) "*/")),|[:multi-line-comment (string/join $&)])
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:comment (+ :single-line-comment :multi-line-comment)
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:string (cmt (<- (* "\"" (some (if-not "\"" 1)) "\"")),|[:string (string/join $&)])
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:name-non-digit (+ :a "_")
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:name (some (+ :name-non-digit (range "\x80\xFF")))
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:variable (cmt (<- (* "$" :name)),|[:variable (string/join $&)])
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:scalar-type (+ "bool" "float" "int" "string")
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:base-type (+ "array" "callable" "iterable" :scalar-type)
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:return-type (cmt (<- (+ :base-type "void")),|[:return-type $0])
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:keyword (cmt (<- (+ "abstract" "and" "array" "as" "break" "callable" "case" "catch" "class" "clone"
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"const" "continue" "declare" "default" "die" "do" "echo" "else" "elseif" "empty"
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"enddeclare" "endfor" "endforeach" "endif" "endswitch" "endwhile" "eval" "exit"
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"extends" "final" "finally" "for" "foreach" "function" "fn" "global"
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"goto" "if" "implements" "include" "include_once" "instanceof"
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"insteadof" "interface" "isset" "list" "namespace" "new" "or" "print" "private"
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"protected" "public" "require" "require_once" "return" "static" "switch"
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"throw" "trait" "try" "unset" "use" "var" "while" "xor" "yield" "yield from")),|[:keyword $0])
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:other (cmt (<- (if-not :comment 1)),|[:other (string/join $&)])
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:main (some (+ :comment :string :variable :return-type :keyword :other))})
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