js-slang/dist/parser/source/rules/noImplicitDeclareUndefined.js

Javascript-based implementations of Source, written in Typescript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.NoImplicitDeclareUndefinedError = void 0;
const formatters_1 = require("../../../utils/formatters");
const errors_1 = require("../../errors");
const misc_1 = require("../../../utils/misc");
class NoImplicitDeclareUndefinedError extends errors_1.RuleError {
    explain() {
        return 'Missing value in variable declaration.';
    }
    elaborate() {
        return (0, formatters_1.stripIndent) `
      A variable declaration assigns a value to a name.
      For instance, to assign 20 to ${this.node.name}, you can write:

        let ${this.node.name} = 20;

        ${this.node.name} + ${this.node.name}; // 40
    `;
    }
}
exports.NoImplicitDeclareUndefinedError = NoImplicitDeclareUndefinedError;
const noImplicitDeclareUndefined = {
    name: 'no-implicit-declare-undefined',
    checkers: {
        VariableDeclaration(node, ancestors) {
            if (ancestors.length > 1) {
                switch (ancestors[ancestors.length - 2].type) {
                    case 'ForOfStatement':
                    case 'ForInStatement':
                        return [];
                }
            }
            return (0, misc_1.mapAndFilter)(node.declarations, decl => decl.init ? undefined : new NoImplicitDeclareUndefinedError(decl.id));
        }
    }
};
exports.default = noImplicitDeclareUndefined;
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