235 lines
8.5 KiB
JavaScript
235 lines
8.5 KiB
JavaScript
import _defineProperty from "@babel/runtime/helpers/defineProperty";
|
|
import { isNode } from '../../utils/is.js';
|
|
import { keywords } from '../keywords.js';
|
|
import { escape } from '../../utils/string.js';
|
|
import { forEach, join } from '../../utils/array.js';
|
|
import { toSymbol } from '../../utils/latex.js';
|
|
import { getPrecedence } from '../operators.js';
|
|
import { factory } from '../../utils/factory.js';
|
|
var name = 'FunctionAssignmentNode';
|
|
var dependencies = ['typed', 'Node'];
|
|
export var createFunctionAssignmentNode = /* #__PURE__ */factory(name, dependencies, _ref => {
|
|
var {
|
|
typed,
|
|
Node
|
|
} = _ref;
|
|
/**
|
|
* Is parenthesis needed?
|
|
* @param {Node} node
|
|
* @param {Object} parenthesis
|
|
* @param {string} implicit
|
|
* @private
|
|
*/
|
|
function needParenthesis(node, parenthesis, implicit) {
|
|
var precedence = getPrecedence(node, parenthesis, implicit);
|
|
var exprPrecedence = getPrecedence(node.expr, parenthesis, implicit);
|
|
return parenthesis === 'all' || exprPrecedence !== null && exprPrecedence <= precedence;
|
|
}
|
|
class FunctionAssignmentNode extends Node {
|
|
/**
|
|
* @constructor FunctionAssignmentNode
|
|
* @extends {Node}
|
|
* Function assignment
|
|
*
|
|
* @param {string} name Function name
|
|
* @param {string[] | Array.<{name: string, type: string}>} params
|
|
* Array with function parameter names, or an
|
|
* array with objects containing the name
|
|
* and type of the parameter
|
|
* @param {Node} expr The function expression
|
|
*/
|
|
constructor(name, params, expr) {
|
|
super();
|
|
// validate input
|
|
if (typeof name !== 'string') {
|
|
throw new TypeError('String expected for parameter "name"');
|
|
}
|
|
if (!Array.isArray(params)) {
|
|
throw new TypeError('Array containing strings or objects expected for parameter "params"');
|
|
}
|
|
if (!isNode(expr)) {
|
|
throw new TypeError('Node expected for parameter "expr"');
|
|
}
|
|
if (keywords.has(name)) {
|
|
throw new Error('Illegal function name, "' + name + '" is a reserved keyword');
|
|
}
|
|
var paramNames = new Set();
|
|
for (var param of params) {
|
|
var _name = typeof param === 'string' ? param : param.name;
|
|
if (paramNames.has(_name)) {
|
|
throw new Error("Duplicate parameter name \"".concat(_name, "\""));
|
|
} else {
|
|
paramNames.add(_name);
|
|
}
|
|
}
|
|
this.name = name;
|
|
this.params = params.map(function (param) {
|
|
return param && param.name || param;
|
|
});
|
|
this.types = params.map(function (param) {
|
|
return param && param.type || 'any';
|
|
});
|
|
this.expr = expr;
|
|
}
|
|
get type() {
|
|
return name;
|
|
}
|
|
get isFunctionAssignmentNode() {
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Compile a node into a JavaScript function.
|
|
* This basically pre-calculates as much as possible and only leaves open
|
|
* calculations which depend on a dynamic scope with variables.
|
|
* @param {Object} math Math.js namespace with functions and constants.
|
|
* @param {Object} argNames An object with argument names as key and `true`
|
|
* as value. Used in the SymbolNode to optimize
|
|
* for arguments from user assigned functions
|
|
* (see FunctionAssignmentNode) or special symbols
|
|
* like `end` (see IndexNode).
|
|
* @return {function} Returns a function which can be called like:
|
|
* evalNode(scope: Object, args: Object, context: *)
|
|
*/
|
|
_compile(math, argNames) {
|
|
var childArgNames = Object.create(argNames);
|
|
forEach(this.params, function (param) {
|
|
childArgNames[param] = true;
|
|
});
|
|
|
|
// compile the function expression with the child args
|
|
var evalExpr = this.expr._compile(math, childArgNames);
|
|
var name = this.name;
|
|
var params = this.params;
|
|
var signature = join(this.types, ',');
|
|
var syntax = name + '(' + join(this.params, ', ') + ')';
|
|
return function evalFunctionAssignmentNode(scope, args, context) {
|
|
var signatures = {};
|
|
signatures[signature] = function () {
|
|
var childArgs = Object.create(args);
|
|
for (var i = 0; i < params.length; i++) {
|
|
childArgs[params[i]] = arguments[i];
|
|
}
|
|
return evalExpr(scope, childArgs, context);
|
|
};
|
|
var fn = typed(name, signatures);
|
|
fn.syntax = syntax;
|
|
scope.set(name, fn);
|
|
return fn;
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Execute a callback for each of the child nodes of this node
|
|
* @param {function(child: Node, path: string, parent: Node)} callback
|
|
*/
|
|
forEach(callback) {
|
|
callback(this.expr, 'expr', this);
|
|
}
|
|
|
|
/**
|
|
* Create a new FunctionAssignmentNode whose children are the results of
|
|
* calling the provided callback function for each child of the original
|
|
* node.
|
|
* @param {function(child: Node, path: string, parent: Node): Node} callback
|
|
* @returns {FunctionAssignmentNode} Returns a transformed copy of the node
|
|
*/
|
|
map(callback) {
|
|
var expr = this._ifNode(callback(this.expr, 'expr', this));
|
|
return new FunctionAssignmentNode(this.name, this.params.slice(0), expr);
|
|
}
|
|
|
|
/**
|
|
* Create a clone of this node, a shallow copy
|
|
* @return {FunctionAssignmentNode}
|
|
*/
|
|
clone() {
|
|
return new FunctionAssignmentNode(this.name, this.params.slice(0), this.expr);
|
|
}
|
|
|
|
/**
|
|
* get string representation
|
|
* @param {Object} options
|
|
* @return {string} str
|
|
*/
|
|
_toString(options) {
|
|
var parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
|
|
var expr = this.expr.toString(options);
|
|
if (needParenthesis(this, parenthesis, options && options.implicit)) {
|
|
expr = '(' + expr + ')';
|
|
}
|
|
return this.name + '(' + this.params.join(', ') + ') = ' + expr;
|
|
}
|
|
|
|
/**
|
|
* Get a JSON representation of the node
|
|
* @returns {Object}
|
|
*/
|
|
toJSON() {
|
|
var types = this.types;
|
|
return {
|
|
mathjs: name,
|
|
name: this.name,
|
|
params: this.params.map(function (param, index) {
|
|
return {
|
|
name: param,
|
|
type: types[index]
|
|
};
|
|
}),
|
|
expr: this.expr
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Instantiate an FunctionAssignmentNode from its JSON representation
|
|
* @param {Object} json
|
|
* An object structured like
|
|
* ```
|
|
* {"mathjs": "FunctionAssignmentNode",
|
|
* name: ..., params: ..., expr: ...}
|
|
* ```
|
|
* where mathjs is optional
|
|
* @returns {FunctionAssignmentNode}
|
|
*/
|
|
static fromJSON(json) {
|
|
return new FunctionAssignmentNode(json.name, json.params, json.expr);
|
|
}
|
|
|
|
/**
|
|
* get HTML representation
|
|
* @param {Object} options
|
|
* @return {string} str
|
|
*/
|
|
_toHTML(options) {
|
|
var parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
|
|
var params = [];
|
|
for (var i = 0; i < this.params.length; i++) {
|
|
params.push('<span class="math-symbol math-parameter">' + escape(this.params[i]) + '</span>');
|
|
}
|
|
var expr = this.expr.toHTML(options);
|
|
if (needParenthesis(this, parenthesis, options && options.implicit)) {
|
|
expr = '<span class="math-parenthesis math-round-parenthesis">(</span>' + expr + '<span class="math-parenthesis math-round-parenthesis">)</span>';
|
|
}
|
|
return '<span class="math-function">' + escape(this.name) + '</span>' + '<span class="math-parenthesis math-round-parenthesis">(</span>' + params.join('<span class="math-separator">,</span>') + '<span class="math-parenthesis math-round-parenthesis">)</span>' + '<span class="math-operator math-assignment-operator ' + 'math-variable-assignment-operator math-binary-operator">=</span>' + expr;
|
|
}
|
|
|
|
/**
|
|
* get LaTeX representation
|
|
* @param {Object} options
|
|
* @return {string} str
|
|
*/
|
|
_toTex(options) {
|
|
var parenthesis = options && options.parenthesis ? options.parenthesis : 'keep';
|
|
var expr = this.expr.toTex(options);
|
|
if (needParenthesis(this, parenthesis, options && options.implicit)) {
|
|
expr = "\\left(".concat(expr, "\\right)");
|
|
}
|
|
return '\\mathrm{' + this.name + '}\\left(' + this.params.map(toSymbol).join(',') + '\\right)=' + expr;
|
|
}
|
|
}
|
|
_defineProperty(FunctionAssignmentNode, "name", name);
|
|
return FunctionAssignmentNode;
|
|
}, {
|
|
isClass: true,
|
|
isNode: true
|
|
}); |