136 lines
5.3 KiB
Plaintext
136 lines
5.3 KiB
Plaintext
file:
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shebang?
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(ignored_line %nl)*
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(block / action / expression)?
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(%nl ignored_line)*
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(!. / (({} (.* -> "Parse error")) => error))
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shebang: "#!" [^%nl]* (!. / %nl)
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statement: (action / expression) (eol / (({} ([^%nl]* -> "Error while parsing line")) => error))
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inline_statement: inline_action / inline_expression
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inline_block (Block):
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inline_statement (%ws* ";" %ws* inline_statement)+
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block (Block):
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statement (nodent (statement / (({} ([^%nl]* -> "Error while parsing block line")) => error)))+
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inline_nomsu (EscapedNomsu): "\" noindex_inline_expression
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indented_nomsu (EscapedNomsu):
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"\" (noindex_inline_expression / (":" %ws* (inline_block / inline_action / inline_expression) eol) / indented_expression)
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index_chain (IndexChain):
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noindex_inline_expression ("." (text_word / noindex_inline_expression))+
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noindex_inline_expression:
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number / variable / inline_text / inline_list / inline_dict / inline_nomsu
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/ ( "("
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%ws* (inline_block / inline_action / inline_expression) %ws*
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(")"
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/ (({} ((!. / &%nl) -> 'Expected to find a ) before the end of the line')) => error)
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/ (({} ([^%nl]* -> 'Error while parsing subexpression')) => error)
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)
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)
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inline_expression:
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index_chain / noindex_inline_expression
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indented_expression:
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indented_text / indented_nomsu / indented_list / indented_dict
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/ ("(..)"? indent
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(block / action / expression)
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(dedent / (({} (non_dedent_error -> "Error while parsing indented expression")) => error))
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)
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expression:
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inline_expression / (":" %ws* (inline_block / inline_action / inline_expression) eol) / indented_expression
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-- Function calls need at least one word in them
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inline_action (Action):
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(inline_expression %ws*)* word (%ws* (inline_expression / word))*
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(%ws* ":" %ws* (inline_block / inline_action / inline_expression))?
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action (Action):
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(expression (dotdot? %ws*))* word ((dotdot? %ws*) (expression / word))*
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word (Word): { %operator / (!number plain_word) }
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text_word (Text): {%operator / (!number plain_word)}
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inline_text (Text):
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!('".."' eol)
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'"' (
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({~ (('\"' -> '"') / ('\\' -> '\') / %escaped_char / [^%nl\"])+ ~}
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/ inline_text_interpolation)*
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) ('"' / (({} ([^%nl]*->'Failed to find a closing " mark on the same line')) => error))
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-- Have to use "%indent" instead of "indent" etc. to avoid messing up text lines that start with "#"
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indented_text (Text):
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'".."' eol %nl (
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{~ (%nl*) (%indent -> "") ~}
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({~
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(("\\" -> "\") / (("\" nodent "..") -> "")/ (%nl+ {~ %nodent -> "" ~}) / [^%nl\] / (!text_interpolation "\"))+
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~} / text_interpolation)*
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) (((!.) &%dedent) / (&(%nl %dedent)) / (({} (non_dedent_error -> "Error while parsing Text")) => error))
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inline_text_interpolation:
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"\" (
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variable / inline_list / inline_dict / inline_text
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/ ("("
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%ws* (inline_block / inline_action / inline_expression) %ws*
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(")"
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/ (({} (&%nl -> 'Expected to find a ")" before the end of the line')) => error)
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/ (({} ([^%nl]* -> 'Error while parsing text interpolation')) => error))
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)
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)
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text_interpolation:
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inline_text_interpolation /
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("\" indented_expression nodent "..")
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number (Number): (("-"? (([0-9]+ "." [0-9]+) / ("." [0-9]+) / ([0-9]+)))-> tonumber)
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-- Variables can be nameless (i.e. just %) and can't contain operators like apostrophe
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-- which is a hack to allow %'s to parse as "%" and "' s" separately
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variable (Var): "%" { ((!"'" %operator) / plain_word)* }
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inline_list (List):
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!('[..]')
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"[" %ws* (inline_list_item (comma inline_list_item)* comma?)? %ws*
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("]" / (({} ([^%nl]*->"Failed to find a closing ] on the same line")) => error))
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indented_list (List):
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"[..]" indent
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list_line (nodent list_line)*
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(dedent / (({} (non_dedent_error -> "Error while parsing list")) => error))
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list_line:
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((action / expression) !comma)
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/ (inline_list_item (comma list_line?)?)
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inline_list_item: inline_block / inline_action / inline_expression
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inline_dict (Dict):
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!('{..}')
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"{" %ws* (inline_dict_entry (comma inline_dict_entry)*)? %ws*
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("}"
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/ (({} (%ws* comma? (!. / &%nl)->"Failed to find a closing } on the same line")) => error)
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/ (({} ([^%nl]*->"Error while parsing dictionary")) => error))
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indented_dict (Dict):
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"{..}" indent
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dict_line (nodent dict_line)*
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(dedent / (({} (non_dedent_error -> "Error while parsing dict")) => error))
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dict_line:
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(dict_entry !comma) / (inline_dict_entry (comma dict_line?)?)
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dict_entry(DictEntry):
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dict_key %ws* ":" %ws* (action / expression)
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inline_dict_entry(DictEntry):
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dict_key %ws* (":" %ws* (inline_block / inline_action / inline_expression)?)
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dict_key:
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text_word / inline_expression
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comment: "#" [^%nl]* (%nl+ %indent [^%nl]* (%nl+ %nodent [^%nl]*)* %dedent)?
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eol_comment: "#" [^%nl]*
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eol: %ws* eol_comment? (!. / &%nl)
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ignored_line: (%nodent comment) / (%ws* (!. / &%nl))
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indent: eol (%nl ignored_line)* %nl %indent (comment (%nl ignored_line)* nodent)?
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nodent: eol (%nl ignored_line)* %nl %nodent
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dedent: eol (%nl ignored_line)* (((!.) &%dedent) / (&(%nl %dedent)))
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non_dedent_error: (!dedent .)* eol (%nl ignored_line)* (!. / &%nl)
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comma: %ws* "," %ws*
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dotdot: nodent ".."
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plain_word: ([a-zA-Z0-9_-] / %utf8_char)+
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