@typescript-eslint/eslint-plugin
Version:
TypeScript plugin for ESLint
162 lines (161 loc) • 6.14 kB
JavaScript
;
// adapted from https://github.com/eslint/eslint/blob/5bdaae205c3a0089ea338b382df59e21d5b06436/lib/rules/utils/ast-utils.js#L1668-L1787
Object.defineProperty(exports, "__esModule", { value: true });
exports.getFunctionHeadLoc = getFunctionHeadLoc;
const utils_1 = require("@typescript-eslint/utils");
const astUtils_1 = require("./astUtils");
/**
* Gets the `(` token of the given function node.
* @param node The function node to get.
* @param sourceCode The source code object to get tokens.
* @returns `(` token.
*/
function getOpeningParenOfParams(node, sourceCode) {
// If the node is an arrow function and doesn't have parens, this returns the identifier of the first param.
if (node.type === utils_1.AST_NODE_TYPES.ArrowFunctionExpression &&
node.params.length === 1) {
const argToken = utils_1.ESLintUtils.nullThrows(sourceCode.getFirstToken(node.params[0]), utils_1.ESLintUtils.NullThrowsReasons.MissingToken('parameter', 'arrow function'));
const maybeParenToken = sourceCode.getTokenBefore(argToken);
return maybeParenToken && (0, astUtils_1.isOpeningParenToken)(maybeParenToken)
? maybeParenToken
: argToken;
}
// Otherwise, returns paren.
return node.id != null
? utils_1.ESLintUtils.nullThrows(sourceCode.getTokenAfter(node.id, astUtils_1.isOpeningParenToken), utils_1.ESLintUtils.NullThrowsReasons.MissingToken('id', 'function'))
: utils_1.ESLintUtils.nullThrows(sourceCode.getFirstToken(node, astUtils_1.isOpeningParenToken), utils_1.ESLintUtils.NullThrowsReasons.MissingToken('opening parenthesis', 'function'));
}
/**
* Gets the location of the given function node for reporting.
*
* - `function foo() {}`
* ^^^^^^^^^^^^
* - `(function foo() {})`
* ^^^^^^^^^^^^
* - `(function() {})`
* ^^^^^^^^
* - `function* foo() {}`
* ^^^^^^^^^^^^^
* - `(function* foo() {})`
* ^^^^^^^^^^^^^
* - `(function*() {})`
* ^^^^^^^^^
* - `() => {}`
* ^^
* - `async () => {}`
* ^^
* - `({ foo: function foo() {} })`
* ^^^^^^^^^^^^^^^^^
* - `({ foo: function() {} })`
* ^^^^^^^^^^^^^
* - `({ ['foo']: function() {} })`
* ^^^^^^^^^^^^^^^^^
* - `({ [foo]: function() {} })`
* ^^^^^^^^^^^^^^^
* - `({ foo() {} })`
* ^^^
* - `({ foo: function* foo() {} })`
* ^^^^^^^^^^^^^^^^^^
* - `({ foo: function*() {} })`
* ^^^^^^^^^^^^^^
* - `({ ['foo']: function*() {} })`
* ^^^^^^^^^^^^^^^^^^
* - `({ [foo]: function*() {} })`
* ^^^^^^^^^^^^^^^^
* - `({ *foo() {} })`
* ^^^^
* - `({ foo: async function foo() {} })`
* ^^^^^^^^^^^^^^^^^^^^^^^
* - `({ foo: async function() {} })`
* ^^^^^^^^^^^^^^^^^^^
* - `({ ['foo']: async function() {} })`
* ^^^^^^^^^^^^^^^^^^^^^^^
* - `({ [foo]: async function() {} })`
* ^^^^^^^^^^^^^^^^^^^^^
* - `({ async foo() {} })`
* ^^^^^^^^^
* - `({ get foo() {} })`
* ^^^^^^^
* - `({ set foo(a) {} })`
* ^^^^^^^
* - `class A { constructor() {} }`
* ^^^^^^^^^^^
* - `class A { foo() {} }`
* ^^^
* - `class A { *foo() {} }`
* ^^^^
* - `class A { async foo() {} }`
* ^^^^^^^^^
* - `class A { ['foo']() {} }`
* ^^^^^^^
* - `class A { *['foo']() {} }`
* ^^^^^^^^
* - `class A { async ['foo']() {} }`
* ^^^^^^^^^^^^^
* - `class A { [foo]() {} }`
* ^^^^^
* - `class A { *[foo]() {} }`
* ^^^^^^
* - `class A { async [foo]() {} }`
* ^^^^^^^^^^^
* - `class A { get foo() {} }`
* ^^^^^^^
* - `class A { set foo(a) {} }`
* ^^^^^^^
* - `class A { static foo() {} }`
* ^^^^^^^^^^
* - `class A { static *foo() {} }`
* ^^^^^^^^^^^
* - `class A { static async foo() {} }`
* ^^^^^^^^^^^^^^^^
* - `class A { static get foo() {} }`
* ^^^^^^^^^^^^^^
* - `class A { static set foo(a) {} }`
* ^^^^^^^^^^^^^^
* - `class A { foo = function() {} }`
* ^^^^^^^^^^^^^^
* - `class A { static foo = function() {} }`
* ^^^^^^^^^^^^^^^^^^^^^
* - `class A { foo = (a, b) => {} }`
* ^^^^^^
* @param node The function node to get.
* @param sourceCode The source code object to get tokens.
* @returns The location of the function node for reporting.
*/
function getFunctionHeadLoc(node, sourceCode) {
const parent = node.parent;
let start = null;
let end = null;
if (parent.type === utils_1.AST_NODE_TYPES.MethodDefinition ||
parent.type === utils_1.AST_NODE_TYPES.PropertyDefinition) {
// the decorator's range is included within the member
// however it's usually irrelevant to the member itself - so we don't want
// to highlight it ever.
if (parent.decorators.length > 0) {
const lastDecorator = parent.decorators[parent.decorators.length - 1];
const firstTokenAfterDecorator = utils_1.ESLintUtils.nullThrows(sourceCode.getTokenAfter(lastDecorator), utils_1.ESLintUtils.NullThrowsReasons.MissingToken('modifier or member name', 'class member'));
start = firstTokenAfterDecorator.loc.start;
}
else {
start = parent.loc.start;
}
end = getOpeningParenOfParams(node, sourceCode).loc.start;
}
else if (parent.type === utils_1.AST_NODE_TYPES.Property) {
start = parent.loc.start;
end = getOpeningParenOfParams(node, sourceCode).loc.start;
}
else if (node.type === utils_1.AST_NODE_TYPES.ArrowFunctionExpression) {
const arrowToken = utils_1.ESLintUtils.nullThrows(sourceCode.getTokenBefore(node.body, astUtils_1.isArrowToken), utils_1.ESLintUtils.NullThrowsReasons.MissingToken('arrow token', 'arrow function'));
start = arrowToken.loc.start;
end = arrowToken.loc.end;
}
else {
start = node.loc.start;
end = getOpeningParenOfParams(node, sourceCode).loc.start;
}
return {
end: { ...end },
start: { ...start },
};
}