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module.exports = function(hljs) {
var GCODE_IDENT_RE = '[A-Z_][A-Z0-9_.]*';
var GCODE_CLOSE_RE = '\\%';
var GCODE_KEYWORDS =
'IF DO WHILE ENDWHILE CALL ENDIF SUB ENDSUB GOTO REPEAT ENDREPEAT ' +
'EQ LT GT NE GE LE OR XOR';
var GCODE_START = {
className: 'meta',
begin: '([O])([0-9]+)'
};
var GCODE_CODE = [
hljs.C_LINE_COMMENT_MODE,
hljs.C_BLOCK_COMMENT_MODE,
hljs.COMMENT(/\(/, /\)/),
hljs.inherit(hljs.C_NUMBER_MODE, {begin: '([-+]?([0-9]*\\.?[0-9]+\\.?))|' + hljs.C_NUMBER_RE}),
hljs.inherit(hljs.APOS_STRING_MODE, {illegal: null}),
hljs.inherit(hljs.QUOTE_STRING_MODE, {illegal: null}),
{
className: 'name',
begin: '([G])([0-9]+\\.?[0-9]?)'
},
{
className: 'name',
begin: '([M])([0-9]+\\.?[0-9]?)'
},
{
className: 'attr',
begin: '(VC|VS|#)',
end: '(\\d+)'
},
{
className: 'attr',
begin: '(VZOFX|VZOFY|VZOFZ)'
},
{
className: 'built_in',
begin: '(ATAN|ABS|ACOS|ASIN|SIN|COS|EXP|FIX|FUP|ROUND|LN|TAN)(\\[)',
end: '([-+]?([0-9]*\\.?[0-9]+\\.?))(\\])'
},
{
className: 'symbol',
variants: [
{
begin: 'N', end: '\\d+',
illegal: '\\W'
}
]
}
];
return {
aliases: ['nc'],
// Some implementations (CNC controls) of G-code are interoperable with uppercase and lowercase letters seamlessly.
// However, most prefer all uppercase and uppercase is customary.
case_insensitive: true,
lexemes: GCODE_IDENT_RE,
keywords: GCODE_KEYWORDS,
contains: [
{
className: 'meta',
begin: GCODE_CLOSE_RE
},
GCODE_START
].concat(GCODE_CODE)
};
};