propositional/lib/truthtable/getIntermediate.js

Propositional logic symbolic computation library

"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.getSubExpressions = exports.getVariables = void 0;
const AST = __importStar(require("../syntax/ast"));
const token_1 = require("../syntax/token");
function getVariables(expression) {
    let variables = new Set();
    switch (true) {
        case expression instanceof AST.Literal:
            if (expression.value.type == token_1.TokenType.VARIABLE)
                variables.add(expression.value.lexeme);
            break;
        case expression instanceof AST.UnaryExpression:
            variables = new Set([...variables, ...getVariables(expression.inner)]);
            break;
        case expression instanceof AST.BinaryExpression:
            variables = new Set([...variables, ...getVariables(expression.left), ...getVariables(expression.right)]);
            break;
    }
    return variables;
}
exports.getVariables = getVariables;
function getSubExpressions(expression) {
    switch (true) {
        case expression instanceof AST.Literal:
            return [];
        case expression instanceof AST.UnaryExpression:
            return [expression, ...getSubExpressions(expression.inner)];
        case expression instanceof AST.BinaryExpression:
            return [expression, ...getSubExpressions(expression.right), ...getSubExpressions(expression.left)];
    }
}
exports.getSubExpressions = getSubExpressions;