common.lark

// Basic terminals for common use


//
// Numbers
//

DIGIT: "0".."9"
HEXDIGIT: "a".."f"|"A".."F"|DIGIT

INT: DIGIT+
SIGNED_INT: ["+"|"-"] INT
DECIMAL: INT "." INT? | "." INT

// float = /-?\d+(\.\d+)?([eE][+-]?\d+)?/
_EXP: ("e"|"E") SIGNED_INT
FLOAT: INT _EXP | DECIMAL _EXP?
SIGNED_FLOAT: ["+"|"-"] FLOAT

NUMBER: FLOAT | INT
SIGNED_NUMBER: ["+"|"-"] NUMBER

//
// Strings
//
_STRING_INNER: /.*?/
_STRING_ESC_INNER: _STRING_INNER /(?<!\\)(\\\\)*?/

ESCAPED_STRING : "\"" _STRING_ESC_INNER "\""


//
// Names (Variables)
//
LCASE_LETTER: "a".."z"
UCASE_LETTER: "A".."Z"

LETTER: UCASE_LETTER | LCASE_LETTER
WORD: LETTER+

CNAME: ("_"|LETTER) ("_"|LETTER|DIGIT)*


//
// Whitespace
//
WS_INLINE: (" "|/\t/)+
WS: /[ \t\f\r\n]/+

CR : /\r/
LF : /\n/
NEWLINE: (CR? LF)+


// Comments
SH_COMMENT: /#[^\n]*/
CPP_COMMENT: /\/\/[^\n]*/
C_COMMENT: "/*" /(.|\n)*?/ "*/"
SQL_COMMENT: /--[^\n]*/