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const P = require('./src/parser.js')
const D = require('./src/dice.js')
const interpret = tree => {
switch(tree.type) {
case 'constant':
return D.constant(tree.value)
case 'd':
return D.d(interpret(tree.left), interpret(tree.right))
case 'E':
return D.explode(interpret(tree.left), interpret(tree.right))
case 'K':
return D.keepHigh(interpret(tree.left), interpret(tree.right))
case 'k':
return D.keepLow(interpret(tree.left), interpret(tree.right))
case 'A':
return D.again(interpret(tree.left), interpret(tree.right))
case 'add':
return D.add(interpret(tree.left), interpret(tree.right))
case 'subtract':
return D.subtract(interpret(tree.left), interpret(tree.right))
case 'negative':
return D.negative(interpret(tree.value))
case 'bonusAdd':
return D.bonusAdd(interpret(tree.left), interpret(tree.right))
case 'bonusSubtract':
return D.bonusSubtract(interpret(tree.left), interpret(tree.right))
}
}
const parse = expressionString => {
const tree = P.parse(expressionString)
return interpret(tree)
}
exports.parse = parse
exports.roll = D.roll
exports.pool = D.pool
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