Try this here: http://pegjs.org/online
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November 17, 2021 11:25
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PEG.jsによる逆ポ
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| Statement | |
| = a:Expression _ b:Statement _ operator:Operator {return operator(a,b)} | |
| / Expression | |
| Expression | |
| = a:Number _ b:Number _ operator:Operator {return operator(a,b)} | |
| / Number | |
| Operator "operator" | |
| = "*" {return function(a,b){return a*b}} | |
| / "+" {return function(a,b){return a+b}} | |
| / "-" {return function(a,b){return a-b}} | |
| / "/" {return function(a,b){return a/b}} | |
| Number | |
| = Double | |
| /Integer | |
| Double | |
| = a:Integer "." b:Integer {return Number(text())}; | |
| Integer | |
| = [0-9]+ { return Number(text()); } | |
| _ "whitespace" | |
| = [ \t\n\r]* |
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