calcium-lang/dist/runtime/environment.js

Calcium language interpreter

import Address from "./address";
import Namespace from "./namespace";
import { None } from "../factory";
/**
 * the runtime environment that has data to control the execution
 */
export default class Environment {
    /**
     *
     * @param code must be a valid JSON array or its stringified representation.
     * @param builtin the namespace for built-in objects
     */
    constructor(code, builtin) {
        /**
         * the current point of the execution
         */
        this.address = new Address(1, 0);
        /**
         * a stack of command blocks
         */
        this.blocks = [];
        /**
         * used when a function call is returned, and the command is restarted
         */
        this.commandsWithCall = [];
        /**
         * used to return a value from a function
         */
        this.returnedValue = None;
        /**
         * a call stack
         */
        this.callStack = [];
        if (typeof code === "string") {
            this.code = JSON.parse(code);
        }
        else {
            this.code = code;
        }
        const global = new Namespace(builtin);
        this.context = global;
    }
    /**
     * get the current line index in the code array
     */
    get currentLineIndex() {
        return this.address.line;
    }
    get exceptionThrown() {
        return this.exception !== undefined;
    }
    /**
     * get the last block that had been entered
     */
    get lastBlock() {
        return this.blocks[this.blocks.length - 1];
    }
}
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