PEG.js Mode /* * Classic example grammar, which recognizes simple arithmetic expressions like * "2*(3+4)". The parser generated from this grammar then computes their value. */ start = additive additive = left:multiplicative "+" right:additive { return left + right; } / multiplicative multiplicative = left:primary "*" right:multiplicative { return left * right; } / primary primary = integer / "(" additive:additive ")" { return additive; } integer "integer" = digits:[0-9]+ { return parseInt(digits.join(""), 10); } letter = [a-z]+1/*2 * Classic example grammar, which recognizes simple arithmetic expressions like3 * "2*(3+4)". The parser generated from this grammar then computes their value.4 */5 6start7 = additive8 9additive10 = left:multiplicative "+" right:additive { return left + right; }11 / multiplicative12 13multiplicative14 = left:primary "*" right:multiplicative { return left * right; }15 / primary16 17primary18 = integer19 / "(" additive:additive ")" { return additive; }20 21integer "integer"22 = digits:[0-9]+ { return parseInt(digits.join(""), 10); }23 24letter = [a-z]+ The PEG.js Mode Created by Forbes Lindesay.
