12345678910111213141516171819202122232425 |
- const AST = require('./ast')
- const OsloError = require('./osloError')
-
- module.exports = {
- '+': (a, b) => new AST.Number({ value: a.value + b.value }),
- '-': (a, b) => new AST.Number({ value: a.value - b.value }),
- '*': (a, b) => new AST.Number({ value: a.value * b.value }),
- '/': (a, b) => new AST.Number({ value: a.value / b.value }),
- '=': (a, b) => new AST.Boolean({ value: a.value === b.value }),
- '>': (a, b) => new AST.Boolean({ value: a.value > b.value }),
- '<': (a, b) => new AST.Boolean({ value: a.value < b.value }),
- '>=': (a, b) => new AST.Boolean({ value: a.value >= b.value }),
- '<=': (a, b) => new AST.Boolean({ value: a.value <= b.value }),
- 'list': (...args) => { return new AST.List({ elements: args }) },
- 'length': xs => {
- if (xs.constructor == AST.List) {
- return new AST.Number({ value: xs.elements.length })
- }
-
- return new OsloError({
- line: xs.line,
- message: 'length: argument is not a list'
- })
- }
- }
|