mirror of
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[grammar test] Cleaner grammar.
This commit is contained in:
Miguel Lechon
+101
-142
@@ -9,148 +9,20 @@
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* and miscellaneous semantics (@fill, @markup)
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*/
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//// Arbitrarily deep tree, possibly empty
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// file : [@child set]
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// set : '{' [@child set] '}' | set [separator @sibling set]
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// separator : ' ' | '\n' | ',' | ';'
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//// Labeled leaves
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// file : [@child set]
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// set : @fill 'A' | '{' [@child set] '}' | set [separator @sibling set]
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// separator : ' ' | '\n' | ',' | ';'
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//// Labeled internal nodes
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// file : [@child set]
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// set : @fill 'A' | [@fill 'A' ':'] scoped_set | set [separator @sibling set]
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// separator : ' ' | '\n' | ',' | ';'
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// scoped_set : '{' [@child set] '}'
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//// Unscoped tests (feels like there should be an easier way to express this)
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// file : general_set
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// general_set : { [@child set] | [@child uns_set] }
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// set : @fill 'A' | set [sep1 @sibling set] | scoped_set | uns_set sep2 @sibling set
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// uns_set : @fill 'A' [uns_set_tail]
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// uns_set_tail : ':' @child uns_set | ' ' @sibling uns_set | ':' scoped_set | ' ' @sibling scoped_set
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// scoped_set : '{' general_set '}'
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// sep1 : ' ' | '\n' | ',' | ';'
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// sep2 : '\n'| ',' | ';'
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//// Tags
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// file : general_set
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// general_set : { [@child set] | [@child uns_set] }
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// set : {[tag_list] untagged_set}
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// uns_set : {[tag_list] untagged_uns_set}
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// tag_list : '@' @tag tag ' ' [tag_list]
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// tag : @fill 'T'['(' general_set ')']
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// untagged_set : @fill 'A' | set [sep1 @sibling set] | scoped_set | uns_set sep2 @sibling set
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// untagged_uns_set: @fill 'A' [uns_set_tail]
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// uns_set_tail : ':' @child uns_set | ' ' @sibling uns_set | ':' scoped_set | ' ' @sibling scoped_set
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// scoped_set : '{' general_set '}'
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// sep1 : ' ' | '\n' | ',' | ';'
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// sep2 : '\n'| ',' | ';'
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//// Alternative scope markers
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// file : general_set
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// general_set : { [@child set] | [@child uns_set] }
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// set : {[tag_list] untagged_set}
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// uns_set : {[tag_list] untagged_uns_set}
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// tag_list : '@' @tag tag ' ' [tag_list]
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// tag : @fill 'T'['(' general_set ')']
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// untagged_set : @fill 'A' | set [sep1 @sibling set] | scoped_set | uns_set sep2 @sibling set
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// untagged_uns_set: @fill 'A' [uns_set_tail]
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// uns_set_tail : ':' @child uns_set | ' ' @sibling uns_set | ':' scoped_set | ' ' @sibling scoped_set
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// scoped_set : '{' general_set '}' | alt_scope_beg general_set alt_scope_end
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// alt_scope_beg : '(' | '['
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// alt_scope_end : ')' | ']'
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// sep1 : ' ' | '\n' | ',' | ';'
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// sep2 : '\n'| ',' | ';'
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//// Identifiers
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// file : general_set
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// general_set : { [@child set] | [@child uns_set] }
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// set : {[tag_list] untagged_set}
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// uns_set : {[tag_list] untagged_uns_set}
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// tag_list : '@' @tag tag ' ' [tag_list]
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// tag : @fill id['(' general_set ')']
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// untagged_set : @fill 'A' | set [sep1 @sibling set] | scoped_set | uns_set sep2 @sibling set
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// untagged_uns_set: @fill 'A' [uns_set_tail]
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// uns_set_tail : ':' @child uns_set | ' ' @sibling uns_set | ':' scoped_set | ' ' @sibling scoped_set
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// scoped_set : '{' general_set '}' | alt_scope_beg general_set alt_scope_end
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// alt_scope_beg : '(' | '['
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// alt_scope_end : ')' | ']'
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// sep1 : ' ' | '\n' | ',' | ';'
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// sep2 : '\n'| ',' | ';'
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// id : alpha [alphanumeric] | '_' [alphanumeric]
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// alphanumeric : alpha [alphanumeric] | digit [alphanumeric] | '_' [alphanumeric]
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// alpha : lowercase | uppercase
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// lowercase : 'a'|'b'|'c'|'d'|'e'|'f'|'g'|'h'|'i'|'j'|'k'|'l'|'m'|'n'|'o'|'p'|'q'|'r'|'s'|'t'|'u'|'v'|'w'|'z'|'y'|'z'
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// uppercase : 'A'|'B'|'C'|'D'|'E'|'F'|'G'|'H'|'I'|'J'|'K'|'L'|'M'|'N'|'O'|'P'|'Q'|'R'|'S'|'T'|'U'|'V'|'W'|'Z'|'Y'|'Z'
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// digit : '0'|'1'|'2'|'3'|'4'|'5'|'6'|'7'|'8'|'9'
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//// General labels
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//file : general_set
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//general_set : { [@child set] | [@child uns_set] }
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//set : {[tag_list] untagged_set}
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//uns_set : {[tag_list] untagged_uns_set}
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//tag_list : '@' @tag tag ' ' [tag_list]
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//tag : @fill id['(' general_set ')']
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//untagged_set : @fill label | untagged_set [sep1 @sibling set] | scoped_set | untagged_uns_set sep2 @sibling set
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//untagged_uns_set: @fill label [uns_set_tail]
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//uns_set_tail : ':' @child uns_set | ' ' @sibling uns_set | ':' scoped_set | ' ' @sibling scoped_set
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//scoped_set : '{' general_set '}' | alt_scope_beg general_set alt_scope_end
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//alt_scope_beg : '(' | '['
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//alt_scope_end : ')' | ']'
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//sep1 : ' ' | '\n' | ',' | ';'
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//sep2 : '\n'| ',' | ';'
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//id : alpha [alphanumeric] | '_' [alphanumeric]
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//alphanumeric : alpha [alphanumeric] | digit [alphanumeric] | '_' [alphanumeric]
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//alpha : lowercase | uppercase
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//lowercase : 'a'|'b'|'c'|'d'|'e'|'f'|'g'|'h'|'i'|'j'|'k'|'l'|'m'|'n'|'o'|'p'|'q'|'r'|'s'|'t'|'u'|'v'|'w'|'z'|'y'|'z'
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//uppercase : 'A'|'B'|'C'|'D'|'E'|'F'|'G'|'H'|'I'|'J'|'K'|'L'|'M'|'N'|'O'|'P'|'Q'|'R'|'S'|'T'|'U'|'V'|'W'|'Z'|'Y'|'Z'
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//digit : '0'|'1'|'2'|'3'|'4'|'5'|'6'|'7'|'8'|'9'
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//label : id | integer_literal | char_literal | string_literal | symbol_label
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//integer_literal : { ['-'] natural_literal }
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//natural_literal : digit [natural_literal]
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//char_literal : @markup '\'' [char_literal_items] @markup '\''
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//char_literal_items : char_literal_item [char_literal_items]
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//char_literal_item : ascii_no_backslash_no_quotes | '"' | '\\' ascii
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//ascii : ascii_no_backslash_no_quotes | '\'' | '"' | '`' | '\\'
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//ascii_no_backslash_no_quotes : digit | alpha | symbol_no_backslash_no_quotes | ' '
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//symbol_no_backslash_no_quotes : symbol_no_backslash_no_quotes_1 | symbol_no_backslash_no_quotes_2
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//symbol_no_backslash_no_quotes_1 : '!'|'#'|'$'|'%'|'&'|'('|')'|'*'|'+'|','|'-'|'.'|'/'|':'
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//symbol_no_backslash_no_quotes_2 : ';'|'<'|'='|'>'|'?'|'@'|'['|']'|'^'|'_'|'{'|'|'|'}'|'~'
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//string_literal : @markup '"' [string_literal_items] @markup '"' | @markup '`' [string_literal_items] @markup '`'
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//string_literal_items : string_literal_item [string_literal_items]
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//string_literal_item : ascii_no_backslash_no_quotes | '\'' | '\\' ascii
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//symbol_label : '~'|'!'|'%'|'^'|'&'|'*'|'+'|'-'|'/'|'|'|'<'|'>'|'$'|'='|'.'|'?'|'$'
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//// Comments before
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file : general_set
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general_set : { [@child set] | [@child uns_set] }
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set : {[tag_list] ['\n' @pre_comment pre_comment] untagged_set}
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pre_comment : '/' '/' [' '] [@fill c_code_content] '\n' | '/' '*' [@fill c_code_content] '*' '/'
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c_code_content : 'c''o''m''m''e''n''t' // TODO: Arbitrary strings, including C-style comments, as long as /* */ pairs are balanced
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cpp_code_content: 'c''o''m''m''e''n''t' // TODO: Arbitrary strings that don't start with space
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uns_set : {[tag_list] untagged_uns_set}
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tag_list : '@' @tag tag ' ' [tag_list]
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tag : @fill id['(' general_set ')']
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untagged_set : @fill label | untagged_set [sep1 @sibling set] | scoped_set | untagged_uns_set sep2 @sibling set
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untagged_uns_set: @fill label [uns_set_tail]
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uns_set_tail : ':' @child uns_set | ' ' @sibling uns_set | ':' scoped_set | ' ' @sibling scoped_set
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scoped_set : '{' general_set '}' | alt_scope_beg general_set alt_scope_end
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alt_scope_beg : '(' | '['
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alt_scope_end : ')' | ']'
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sep1 : ' ' | '\n' | ',' | ';'
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sep2 : '\n'| ',' | ';'
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id : alpha [alphanumeric] | '_' [alphanumeric]
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alphanumeric : alpha [alphanumeric] | digit [alphanumeric] | '_' [alphanumeric]
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alpha : lowercase | uppercase
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lowercase : 'a'|'b'|'c'|'d'|'e'|'f'|'g'|'h'|'i'|'j'|'k'|'l'|'m'|'n'|'o'|'p'|'q'|'r'|'s'|'t'|'u'|'v'|'w'|'z'|'y'|'z'
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uppercase : 'A'|'B'|'C'|'D'|'E'|'F'|'G'|'H'|'I'|'J'|'K'|'L'|'M'|'N'|'O'|'P'|'Q'|'R'|'S'|'T'|'U'|'V'|'W'|'Z'|'Y'|'Z'
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digit : '0'|'1'|'2'|'3'|'4'|'5'|'6'|'7'|'8'|'9'
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label : id | integer_literal | char_literal | string_literal | symbol_label
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integer_literal : { ['-'] natural_literal }
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natural_literal : digit [natural_literal]
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//// A bunch of common definitions
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separator : ' ' | unscoped_separator
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unscoped_separator : '\n'| ',' | ';'
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alt_scope_beg : '(' | '['
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alt_scope_end : ')' | ']'
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id : alpha [alphanumeric] | '_' [alphanumeric]
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alphanumeric : alpha [alphanumeric] | digit [alphanumeric] | '_' [alphanumeric]
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alpha : lowercase | uppercase
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lowercase : 'a'|'b'|'c'|'d'|'e'|'f'|'g'|'h'|'i'|'j'|'k'|'l'|'m'|'n'|'o'|'p'|'q'|'r'|'s'|'t'|'u'|'v'|'w'|'z'|'y'|'z'
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uppercase : 'A'|'B'|'C'|'D'|'E'|'F'|'G'|'H'|'I'|'J'|'K'|'L'|'M'|'N'|'O'|'P'|'Q'|'R'|'S'|'T'|'U'|'V'|'W'|'Z'|'Y'|'Z'
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digit : '0'|'1'|'2'|'3'|'4'|'5'|'6'|'7'|'8'|'9'
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label : id | integer_literal | char_literal | string_literal | symbol_label
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integer_literal : { ['-'] natural_literal }
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natural_literal : digit [natural_literal]
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char_literal : @markup '\'' [char_literal_items] @markup '\''
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char_literal_items : char_literal_item [char_literal_items]
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char_literal_item : ascii_no_backslash_no_quotes | '"' | '\\' ascii
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@@ -163,3 +35,90 @@ string_literal : @markup '"' [string_literal_items] @markup '"'
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string_literal_items : string_literal_item [string_literal_items]
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string_literal_item : ascii_no_backslash_no_quotes | '\'' | '\\' ascii
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symbol_label : '~'|'!'|'%'|'^'|'&'|'*'|'+'|'-'|'/'|'|'|'<'|'>'|'$'|'='|'.'|'?'|'$'
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//// Arbitrarily deep tree, possibly empty
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// file : [@child set_list]
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// set_list : '{' [@child set_list] '}' [separator @sibling set_list]
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//// Labeled leaves
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// file : [@child set_list]
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// set_list : set [separator @sibling set_list]
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// set : @fill 'A' | '{' [@child set_list] '}'
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//// Labeled internal nodes
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// file : [@child set_list]
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// set_list : set [separator @sibling set_list]
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// set : @fill 'A' | [@fill 'A' ':'] '{' [@child set_list] '}'
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//// Unscoped sets
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// file : [@child set_list]
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// set_list : scoped_set [separator @sibling set_list] | unscoped_set [unscoped_separator @sibling set_list]
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// scoped_set : '{' [@child set_list] '}'
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// unscoped_set : @fill 'A' [unscoped_set_tail]
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// unscoped_set_tail : ':' @child unscoped_set | ' ' @sibling unscoped_set | ':' scoped_set |' ' @sibling scoped_set
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//// Tags
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// file : [@child set_list]
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// set_list : scoped_set [separator @sibling set_list] | unscoped_set [unscoped_separator @sibling set_list]
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// scoped_set : {[tag_list] '{' [@child set_list] '}'}
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// unscoped_set : {[tag_list] @fill 'A' [unscoped_set_tail]}
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// tag_list : '@' @tag tag ' ' [tag_list]
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// tag : @fill 'T'['(' [@child set_list] ')']
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// // unscoped_set_tail : ':' @child unscoped_set | ' ' @sibling unscoped_set | ':' @child scoped_set | ' ' @sibling scoped_set
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// unscoped_set_tail : {':' @child unscoped_set | ' ' @sibling unscoped_set | set_tail_hack | ' ' @sibling scoped_set}
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// // NOTE(mal): Ideally the set_tail_hack should be captured by the simpler
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// // ':' @child scoped_set
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// // but there's a quirk in the grammar.
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// // In "A:{}", A has no children but in "A:@T{}", it has one tagged children,
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// // which means that *the presence of tags* introduces the child
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// set_tail_hack : ':' [@child tag_list] '{' '}' | ':' @child [tag_list] '{' @child set_list '}'
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//// Alternative scope markers
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// file : [@child set_list]
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// set_list : scoped_set [separator @sibling set_list] | unscoped_set [unscoped_separator @sibling set_list]
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// scoped_set : {[tag_list] untagged_scoped_set}
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// untagged_scoped_set : '{' [@child set_list] '}' | alt_scope_beg [@child set_list] alt_scope_end
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// unscoped_set : {[tag_list] @fill 'A' [unscoped_set_tail]}
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// tag_list : '@' @tag tag ' ' [tag_list]
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// tag : @fill 'T'['(' [@child set_list] ')']
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// unscoped_set_tail : {':' @child unscoped_set | ' ' @sibling unscoped_set | set_tail_hack | ' ' @sibling scoped_set}
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// set_tail_hack : {':' [@child tag_list] '{' '}' |
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// ':' @child [tag_list] '{' @child set_list '}' |
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// ':' [@child tag_list] alt_scope_beg alt_scope_end |
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// ':' @child [tag_list] alt_scope_beg @child set_list alt_scope_end
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// }
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//// General tags and labels
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file : [@child set_list]
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set_list : scoped_set [separator @sibling set_list] | unscoped_set [unscoped_separator @sibling set_list]
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scoped_set : {[tag_list] untagged_scoped_set}
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untagged_scoped_set : '{' [@child set_list] '}' | alt_scope_beg [@child set_list] alt_scope_end
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unscoped_set : {[tag_list] @fill label [unscoped_set_tail]}
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tag_list : '@' @tag tag ' ' [tag_list]
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tag : @fill id['(' [@child set_list] ')']
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unscoped_set_tail : {':' @child unscoped_set | ' ' @sibling unscoped_set | set_tail_hack | ' ' @sibling scoped_set}
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set_tail_hack : {':' [@child tag_list] '{' '}' |
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':' @child [tag_list] '{' @child set_list '}' |
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':' [@child tag_list] alt_scope_beg alt_scope_end |
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':' @child [tag_list] alt_scope_beg @child set_list alt_scope_end
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}
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//// Comments before
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//// TODO: This needs some work to make sure that "a /* comment_before_b */ b" can't be generated
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//// but that "a /* comment_after_a */ b" can
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// file : [@child set_list]
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// set_list : scoped_set [separator @sibling set_list] | unscoped_set [unscoped_separator @sibling set_list]
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// scoped_set : {[tag_list] [@pre_comment pre_comment] untagged_scoped_set}
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// pre_comment : '/' '/' [' '] [@fill c_code_content] '\n' | '/' '*' [@fill cpp_code_content] '*' '/'
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// c_code_content : 'c''o''m''m''e''n''t' // TODO: Arbitrary strings, including C-style comments, as long as /* */ pairs are balanced
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// cpp_code_content : 'c''o''m''m''e''n''t' // TODO: Arbitrary strings that don't start with space
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// untagged_scoped_set : '{' [@child set_list] '}' | alt_scope_beg [@child set_list] alt_scope_end
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// unscoped_set : {[tag_list] @fill label [unscoped_set_tail]}
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// tag_list : '@' @tag tag ' ' [tag_list]
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// tag : @fill id['(' [@child set_list] ')']
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// unscoped_set_tail : {':' @child unscoped_set | ' ' @sibling unscoped_set | set_tail_hack | ' ' @sibling scoped_set}
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// set_tail_hack : {':' [@child tag_list] '{' '}' |
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// ':' @child [tag_list] '{' @child set_list '}' |
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// ':' [@child tag_list] alt_scope_beg alt_scope_end |
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// ':' @child [tag_list] alt_scope_beg @child set_list alt_scope_end
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// }
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