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slider/node_modules/eslint/lib/rules/semi-style.js

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+/**
+ * @fileoverview Rule to enforce location of semicolons.
+ * @author Toru Nagashima
+ * @deprecated in ESLint v8.53.0
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const astUtils = require("./utils/ast-utils");
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+const SELECTOR = [
+	"BreakStatement",
+	"ContinueStatement",
+	"DebuggerStatement",
+	"DoWhileStatement",
+	"ExportAllDeclaration",
+	"ExportDefaultDeclaration",
+	"ExportNamedDeclaration",
+	"ExpressionStatement",
+	"ImportDeclaration",
+	"ReturnStatement",
+	"ThrowStatement",
+	"VariableDeclaration",
+	"PropertyDefinition",
+].join(",");
+
+/**
+ * Get the child node list of a given node.
+ * This returns `BlockStatement#body`, `StaticBlock#body`, `Program#body`,
+ * `ClassBody#body`, or `SwitchCase#consequent`.
+ * This is used to check whether a node is the first/last child.
+ * @param {Node} node A node to get child node list.
+ * @returns {Node[]|null} The child node list.
+ */
+function getChildren(node) {
+	const t = node.type;
+
+	if (
+		t === "BlockStatement" ||
+		t === "StaticBlock" ||
+		t === "Program" ||
+		t === "ClassBody"
+	) {
+		return node.body;
+	}
+	if (t === "SwitchCase") {
+		return node.consequent;
+	}
+	return null;
+}
+
+/**
+ * Check whether a given node is the last statement in the parent block.
+ * @param {Node} node A node to check.
+ * @returns {boolean} `true` if the node is the last statement in the parent block.
+ */
+function isLastChild(node) {
+	const t = node.parent.type;
+
+	if (
+		t === "IfStatement" &&
+		node.parent.consequent === node &&
+		node.parent.alternate
+	) {
+		// before `else` keyword.
+		return true;
+	}
+	if (t === "DoWhileStatement") {
+		// before `while` keyword.
+		return true;
+	}
+	const nodeList = getChildren(node.parent);
+
+	return nodeList !== null && nodeList.at(-1) === node; // before `}` or etc.
+}
+
+/** @type {import('../types').Rule.RuleModule} */
+module.exports = {
+	meta: {
+		deprecated: {
+			message: "Formatting rules are being moved out of ESLint core.",
+			url: "https://eslint.org/blog/2023/10/deprecating-formatting-rules/",
+			deprecatedSince: "8.53.0",
+			availableUntil: "10.0.0",
+			replacedBy: [
+				{
+					message:
+						"ESLint Stylistic now maintains deprecated stylistic core rules.",
+					url: "https://eslint.style/guide/migration",
+					plugin: {
+						name: "@stylistic/eslint-plugin",
+						url: "https://eslint.style",
+					},
+					rule: {
+						name: "semi-style",
+						url: "https://eslint.style/rules/semi-style",
+					},
+				},
+			],
+		},
+		type: "layout",
+
+		docs: {
+			description: "Enforce location of semicolons",
+			recommended: false,
+			url: "https://eslint.org/docs/latest/rules/semi-style",
+		},
+
+		schema: [{ enum: ["last", "first"] }],
+		fixable: "whitespace",
+
+		messages: {
+			expectedSemiColon: "Expected this semicolon to be at {{pos}}.",
+		},
+	},
+
+	create(context) {
+		const sourceCode = context.sourceCode;
+		const option = context.options[0] || "last";
+
+		/**
+		 * Check the given semicolon token.
+		 * @param {Token} semiToken The semicolon token to check.
+		 * @param {"first"|"last"} expected The expected location to check.
+		 * @returns {void}
+		 */
+		function check(semiToken, expected) {
+			const prevToken = sourceCode.getTokenBefore(semiToken);
+			const nextToken = sourceCode.getTokenAfter(semiToken);
+			const prevIsSameLine =
+				!prevToken || astUtils.isTokenOnSameLine(prevToken, semiToken);
+			const nextIsSameLine =
+				!nextToken || astUtils.isTokenOnSameLine(semiToken, nextToken);
+
+			if (
+				(expected === "last" && !prevIsSameLine) ||
+				(expected === "first" && !nextIsSameLine)
+			) {
+				context.report({
+					loc: semiToken.loc,
+					messageId: "expectedSemiColon",
+					data: {
+						pos:
+							expected === "last"
+								? "the end of the previous line"
+								: "the beginning of the next line",
+					},
+					fix(fixer) {
+						if (
+							prevToken &&
+							nextToken &&
+							sourceCode.commentsExistBetween(
+								prevToken,
+								nextToken,
+							)
+						) {
+							return null;
+						}
+
+						const start = prevToken
+							? prevToken.range[1]
+							: semiToken.range[0];
+						const end = nextToken
+							? nextToken.range[0]
+							: semiToken.range[1];
+						const text = expected === "last" ? ";\n" : "\n;";
+
+						return fixer.replaceTextRange([start, end], text);
+					},
+				});
+			}
+		}
+
+		return {
+			[SELECTOR](node) {
+				if (option === "first" && isLastChild(node)) {
+					return;
+				}
+
+				const lastToken = sourceCode.getLastToken(node);
+
+				if (astUtils.isSemicolonToken(lastToken)) {
+					check(lastToken, option);
+				}
+			},
+
+			ForStatement(node) {
+				const firstSemi =
+					node.init &&
+					sourceCode.getTokenAfter(
+						node.init,
+						astUtils.isSemicolonToken,
+					);
+				const secondSemi =
+					node.test &&
+					sourceCode.getTokenAfter(
+						node.test,
+						astUtils.isSemicolonToken,
+					);
+
+				if (firstSemi) {
+					check(firstSemi, "last");
+				}
+				if (secondSemi) {
+					check(secondSemi, "last");
+				}
+			},
+		};
+	},
+};