Add rule no-unused-expressions

Author: Shinigami92

src/rules/eslint/index.d.ts

@@ -7,6 +7,7 @@ import type { MaxLenRule } from './max-len';
 import type { NoCaseDeclarationsRule } from './no-case-declarations';
 import type { NoConstantConditionRule } from './no-constant-condition';
 import type { NoDebuggerRule } from './no-debugger';
+import type { NoUnusedExpressionsRule } from './no-unused-expressions';
 import type { QuotesRule } from './quotes';
 import type { SemiRule } from './semi';
 
@@ -22,5 +23,6 @@ export type EslintRules = CommaDangleRule &
   NoCaseDeclarationsRule &
   NoConstantConditionRule &
   NoDebuggerRule &
+  NoUnusedExpressionsRule &
   QuotesRule &
   SemiRule;

src/rules/eslint/no-unused-expressions.d.ts

@@ -0,0 +1,65 @@
+import type { RuleConfig } from '../rule-config';
+
+/**
+ * Option.
+ */
+export type NoUnusedExpressionsOption = {
+  /**
+   * Set to `true` will allow you to use short circuit evaluations in your expressions.
+   *
+   * @default false
+   *
+   * @see [allowShortCircuit](https://eslint.org/docs/rules/no-unused-expressions#allowshortcircuit)
+   */
+  allowShortCircuit?: boolean;
+  /**
+   * Set to `true` will enable you to use ternary operators in your expressions similarly to short circuit evaluations.
+   *
+   * @default false
+   *
+   * @see [allowTernary](https://eslint.org/docs/rules/no-unused-expressions#allowternary)
+   */
+  allowTernary?: boolean;
+  /**
+   * Set to `true` will enable you to use tagged template literals in your expressions.
+   *
+   * @default false
+   *
+   * @see [allowTaggedTemplates](https://eslint.org/docs/rules/no-unused-expressions#allowtaggedtemplates)
+   */
+  allowTaggedTemplates?: boolean;
+  /**
+   * Set to `true` will flag unused JSX element expressions.
+   *
+   * @default false
+   *
+   * @see [enforceForJSX](https://eslint.org/docs/rules/no-unused-expressions#enforceforjsx)
+   */
+  enforceForJSX?: boolean;
+};
+
+/**
+ * Options.
+ */
+export type NoUnusedExpressionsOptions = [NoUnusedExpressionsOption?];
+
+/**
+ * Disallow unused expressions.
+ *
+ * @see [no-unused-expressions](https://eslint.org/docs/rules/no-unused-expressions)
+ */
+export type NoUnusedExpressionsRuleConfig = RuleConfig<NoUnusedExpressionsOptions>;
+
+/**
+ * Disallow unused expressions.
+ *
+ * @see [no-unused-expressions](https://eslint.org/docs/rules/no-unused-expressions)
+ */
+export interface NoUnusedExpressionsRule {
+  /**
+   * Disallow unused expressions.
+   *
+   * @see [no-unused-expressions](https://eslint.org/docs/rules/no-unused-expressions)
+   */
+  'no-unused-expressions': NoUnusedExpressionsRuleConfig;
+}