PEG.js Mode

AخA
 
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 /* * 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
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                    left + right; } / multiplicative multiplicative = left:primary "*" right:multiplicative { return left * right; } / primary primary = integer / "(" additive:additive ")" { return additive; } integer "integer" = digits:[0-9]+ { return
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                    parseInt(digits.join(""), 10); } letter = [a-z]+

The PEG.js Mode

Created by Forbes Lindesay.