Sha256: 28c2d16e0c8d441447df7342bbe5e920df3340b26f1d773240b2d54b7b6c38ab
Contents?: true
Size: 1.25 KB
Versions: 10
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Stored size: 1.25 KB
Contents
export { default as isReference } from 'is-reference';
export function flatten(node) {
const parts = [];
while (node.type === 'MemberExpression') {
if (node.computed) return null;
parts.unshift(node.property.name);
node = node.object;
}
if (node.type !== 'Identifier') return null;
const name = node.name;
parts.unshift(name);
return { name, keypath: parts.join('.') };
}
export function isTruthy(node) {
if (node.type === 'Literal') return !!node.value;
if (node.type === 'ParenthesizedExpression') return isTruthy(node.expression);
if (node.operator in operators) return operators[node.operator](node);
}
export function isFalsy(node) {
return not(isTruthy(node));
}
function not(value) {
return value === undefined ? value : !value;
}
function equals(a, b, strict) {
if (a.type !== b.type) return undefined;
if (a.type === 'Literal') return strict ? a.value === b.value : a.value == b.value;
}
const operators = {
'==': x => {
return equals(x.left, x.right, false);
},
'!=': x => not(operators['=='](x)),
'===': x => {
return equals(x.left, x.right, true);
},
'!==': x => not(operators['==='](x)),
'!': x => isFalsy(x.argument),
'&&': x => isTruthy(x.left) && isTruthy(x.right),
'||': x => isTruthy(x.left) || isTruthy(x.right)
};
Version data entries
10 entries across 10 versions & 1 rubygems