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experimental grammar

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Jonathan Shook 2020-11-19 16:32:40 -06:00
parent 3f65a05463
commit 7e880b9192
1 changed files with 60 additions and 0 deletions
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virtdata-lang/src/main/java/io/nosqlbench/virtdata/lang/oldgrammars/Config.g4 Normal file
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grammar Config;
// https://www.youtube.com/watch?v=eW4WFgRtFeY
config : OPEN_BRACE? assignments CLOSE_BRACE?;
scope : OPEN_BRACE assignments CLOSE_BRACE;
assignments : assignment? ( COMMA assignment )* ;
assignment :
(ID OPEN_BRACE cval CLOSE_BRACE)
| (ID ASSIGN cval)
| ( ID ASSIGN? scope );
ASSIGN : '=' | ':' ;
OPEN_BRACE : '{';
CLOSE_BRACE : '}';
COMMA : ',';
ID: IDPART ('.' IDPART)* ;
IDPART: ( ( [a-zA-Z] [0-9a-zA-Z_]* )
| ( [a-zA-Z] [0-9a-zA-Z_]* '-' [0-9a-zA-Z_]) )
;
NEWLINE : '\r' '\n' | '\n' | '\r';
cval : ( realNumber | wholeNumber | booleanValue | stringValue | hexValue);
realNumber: FLOAT;
wholeNumber: INTEGER;
booleanValue: BOOLEAN;
stringValue : SSTRING_LITERAL | DSTRING_LITERAL | RAW_SCOPE_LITERAL;
hexValue : HEX_LITERAL;
LONG : '-'? INT ('l'|'L') ;
DOUBLE : ('-'? INT '.' '0'* INT EXP? | '-'? INT EXP | '-'? INT ) ('d'|'D') ;
INTEGER : '-'? INT ;
FLOAT
: '-'? INT '.' INT EXP? // 1.35, 1.35E-9, 0.3, -4.5
| '-'? INT EXP // 1e10 -3e4
| '-'? INT // -3, 45
;
BOOLEAN : 'true' | 'false';
HEX_LITERAL: '0' ('x'|'X') HEX_CHAR+ ;
fragment HEX_CHAR: [0123456789ABCDEFabcdef_];
fragment INT : '0' | [1-9] [0-9]* ; // no leading zeros
fragment ZINT : [0-9]* ; // leading zeroes
fragment EXP : [Ee] [+\-]? INT ;
SSTRING_LITERAL : '\'' (~('\'' | '\\' | '\r' | '\n') | '\\' ('\'' | '\\' | . ))* '\'';
DSTRING_LITERAL :
'"'
(
~('"' | '\\' | '\r' | '\n')
| '\\' ('"' | '\\' | .)
)*
'"';
fragment RAW_SCOPE_LITERAL: ~('}' | '\r' | '\n')+;
fragment RAW_BASIC_LITERAL : ~('"' | '\\' | '\r' | '\n')+;
WS : [\u000C \t\n]+ -> channel(HIDDEN);