/*

Derived from Processing preprocessor code by Jakub Valtar and Florian Jenett.

Copyright (c) 2021 Gagik Amaryan

*/

lexer grammar ProcessingLexer;

import JavaLexer;

// // add color literal notations for

// // #ff5522

// HEX_COLOR_LITERAL

// : '#' HEX_COLOR_VALUE

// ;

HEX_COLOR_VALUE: HEX_DIGIT HEX_DIGIT HEX_DIGIT HEX_DIGIT HEX_DIGIT HEX_DIGIT;

HEX_START: '#';

CIRCLE: 'circle';

ELLIPSE: 'ellipse';

RECT: 'rect';

LINE: 'line';

// catch floating point numbers in a parser rule

DECIMAL_LITERAL: ('0' | [1-9] (Digits? | '_'+ Digits)) [lL]?;

SIZE: 'size';

ABS_FUNC: 'abs';

SUBTRACT: '-';

ADD: '+';

SIN: 'sin';

COS: 'cos';

// special variables

FRAMECOUNT: 'frameCount';

// color-related

COLOR: 'color';

FILL: 'fill';

BACKGROUND: 'background';

STROKE: 'stroke';

HEX_DIGIT: [0-9a-fA-F];

// copy from Java.g4 where is is just a fragment

HEX_FLOAT_LITERAL: '0' [xX] (HexDigits '.'? | HexDigits? '.' HexDigits) [pP] [+-]? Digits [fFdD]?;