39 lines
1.1 KiB
JavaScript
39 lines
1.1 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.compileInlineExpression = compileInlineExpression;
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var _is = require("../../../utils/is.js");
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var _scope = require("../../../utils/scope.js");
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/**
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* Compile an inline expression like "x > 0"
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* @param {Node} expression
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* @param {Object} math
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* @param {Object} scope
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* @return {function} Returns a function with one argument which fills in the
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* undefined variable (like "x") and evaluates the expression
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*/
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function compileInlineExpression(expression, math, scope) {
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// find an undefined symbol
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var symbol = expression.filter(function (node) {
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return (0, _is.isSymbolNode)(node) && !(node.name in math) && !scope.has(node.name);
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})[0];
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if (!symbol) {
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throw new Error('No undefined variable found in inline expression "' + expression + '"');
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} // create a test function for this equation
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var name = symbol.name; // variable name
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var subScope = (0, _scope.createSubScope)(scope);
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var eq = expression.compile();
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return function inlineExpression(x) {
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subScope.set(name, x);
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return eq.evaluate(subScope);
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};
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} |