mirror of
https://github.com/kanaka/mal.git
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a05c086f05
- Use Vector class derived from Array - Use Array/Vector.from for initializing/cloning of Array/Vector - Remove most semi-colon line endings - More use of arrow functions - Use Object.assign to copy properties in _malfunc and function cloning. - Remove or inline a bunch of types.js functions that don't really need to be separate functions: _obj_type, _sequential_Q, _symbol, _symbol_Q, _vector, _vector_Q, _hash_map, _hash_map_Q - Simplify dependency list in Makefile - Remove some separate core.js functions by moving them into the core_ns declaration: _nth, keys, vals, with_meta. With node 7, babel is mostly just used for translating imports into CommonJS requires for node.
69 lines
2.2 KiB
JavaScript
69 lines
2.2 KiB
JavaScript
// General functions
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export function _equal_Q (a, b) {
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if (Array.isArray(a) && Array.isArray(b)) {
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if (a.length !== b.length) { return false }
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for (let i=0; i<a.length; i++) {
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if (! _equal_Q(a[i], b[i])) { return false }
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}
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return true
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} else if (a instanceof Map && b instanceof Map) {
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if (a.size !== b.size) { return false }
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for (let k of a.keys()) {
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if (! _equal_Q(a.get(k), b.get(k))) { return false }
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}
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return true
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} else {
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return a === b
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}
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}
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export function _clone(obj, new_meta) {
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let new_obj = null
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if (_list_Q(obj)) { new_obj = obj.slice(0) }
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else if (obj instanceof Vector) { new_obj = Vector.from(obj.slice(0)) }
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else if (obj instanceof Map) { new_obj = new Map(obj.entries()) }
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else if (obj instanceof Function) { new_obj = obj.clone() }
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else { throw Error("Invalid clone") }
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if (new_meta !== undefined) { new_obj.meta = new_meta }
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return new_obj
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}
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// Functions
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export function _malfunc(f, ast, env, params, meta=null, ismacro=false) {
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return Object.assign(f, {ast, env, params, meta, ismacro})
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}
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export const _malfunc_Q = f => f.ast ? true : false
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Function.prototype.clone = function() {
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let f = (...a) => this.apply(f, a) // new function instance
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return Object.assign(f, this) // copy original properties
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}
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// Keywords
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export const _keyword = obj => _keyword_Q(obj) ? obj : '\u029e' + obj
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export const _keyword_Q = obj => typeof obj === 'string' && obj[0] === '\u029e'
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// Sequence collections
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export const _list_Q = obj => Array.isArray(obj) && !(obj instanceof Vector)
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export class Vector extends Array {}
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export function _assoc_BANG(hm, ...args) {
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if (args.length % 2 === 1) {
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throw new Error('Odd number of assoc arguments')
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}
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// Use iterator/Array.from when it works
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for (let i=0; i<args.length; i+=2) { hm.set(args[i], args[i+1]) }
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return hm
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}
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export function _dissoc_BANG(hm, ...args) {
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for (let i=0; i<args.length; i++) { hm.delete(args[i]) }
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return hm
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}
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// Atoms
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export class Atom {
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constructor(val) { this.val = val }
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}
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