@typescript-eslint/eslint-plugin
Version:
TypeScript plugin for ESLint
183 lines • 8.84 kB
JavaScript
;
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}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
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return result;
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
const utils_1 = require("@typescript-eslint/utils");
const tsutils = __importStar(require("ts-api-utils"));
const ts = __importStar(require("typescript"));
const util_1 = require("../util");
exports.default = (0, util_1.createRule)({
name: 'no-unsafe-argument',
meta: {
type: 'problem',
docs: {
description: 'Disallow calling a function with a value with type `any`',
recommended: 'recommended',
requiresTypeChecking: true,
},
messages: {
unsafeArgument: 'Unsafe argument of type {{sender}} assigned to a parameter of type {{receiver}}.',
unsafeArraySpread: 'Unsafe spread of an {{sender}} array type.',
unsafeSpread: 'Unsafe spread of an {{sender}} type.',
unsafeTupleSpread: 'Unsafe spread of a tuple type. The argument is {{sender}} and is assigned to a parameter of type {{receiver}}.',
},
schema: [],
},
defaultOptions: [],
create(context) {
const services = (0, util_1.getParserServices)(context);
const checker = services.program.getTypeChecker();
function describeType(type) {
if (tsutils.isIntrinsicErrorType(type)) {
return 'error typed';
}
return `\`${checker.typeToString(type)}\``;
}
function describeTypeForSpread(type) {
if (checker.isArrayType(type) &&
tsutils.isIntrinsicErrorType(checker.getTypeArguments(type)[0])) {
return 'error';
}
return describeType(type);
}
function describeTypeForTuple(type) {
if (tsutils.isIntrinsicErrorType(type)) {
return 'error typed';
}
return `of type \`${checker.typeToString(type)}\``;
}
function checkUnsafeArguments(args, callee, node) {
if (args.length === 0) {
return;
}
// ignore any-typed calls as these are caught by no-unsafe-call
if ((0, util_1.isTypeAnyType)(services.getTypeAtLocation(callee))) {
return;
}
const tsNode = services.esTreeNodeToTSNodeMap.get(node);
const signature = util_1.FunctionSignature.create(checker, tsNode);
if (node.type === utils_1.AST_NODE_TYPES.TaggedTemplateExpression) {
// Consumes the first parameter (TemplateStringsArray) of the function called with TaggedTemplateExpression.
signature.getNextParameterType();
}
for (const argument of args) {
switch (argument.type) {
// spreads consume
case utils_1.AST_NODE_TYPES.SpreadElement: {
const spreadArgType = services.getTypeAtLocation(argument.argument);
if ((0, util_1.isTypeAnyType)(spreadArgType)) {
// foo(...any)
context.report({
node: argument,
messageId: 'unsafeSpread',
data: { sender: describeType(spreadArgType) },
});
}
else if ((0, util_1.isTypeAnyArrayType)(spreadArgType, checker)) {
// foo(...any[])
// TODO - we could break down the spread and compare the array type against each argument
context.report({
node: argument,
messageId: 'unsafeArraySpread',
data: { sender: describeTypeForSpread(spreadArgType) },
});
}
else if (checker.isTupleType(spreadArgType)) {
// foo(...[tuple1, tuple2])
const spreadTypeArguments = checker.getTypeArguments(spreadArgType);
for (const tupleType of spreadTypeArguments) {
const parameterType = signature.getNextParameterType();
if (parameterType == null) {
continue;
}
const result = (0, util_1.isUnsafeAssignment)(tupleType, parameterType, checker,
// we can't pass the individual tuple members in here as this will most likely be a spread variable
// not a spread array
null);
if (result) {
context.report({
node: argument,
messageId: 'unsafeTupleSpread',
data: {
receiver: describeType(parameterType),
sender: describeTypeForTuple(tupleType),
},
});
}
}
if (spreadArgType.target.combinedFlags & ts.ElementFlags.Variable) {
// the last element was a rest - so all remaining defined arguments can be considered "consumed"
// all remaining arguments should be compared against the rest type (if one exists)
signature.consumeRemainingArguments();
}
}
else {
// something that's iterable
// handling this will be pretty complex - so we ignore it for now
// TODO - handle generic iterable case
}
break;
}
default: {
const parameterType = signature.getNextParameterType();
if (parameterType == null) {
continue;
}
const argumentType = services.getTypeAtLocation(argument);
const result = (0, util_1.isUnsafeAssignment)(argumentType, parameterType, checker, argument);
if (result) {
context.report({
node: argument,
messageId: 'unsafeArgument',
data: {
receiver: describeType(parameterType),
sender: describeType(argumentType),
},
});
}
}
}
}
}
return {
'CallExpression, NewExpression'(node) {
checkUnsafeArguments(node.arguments, node.callee, node);
},
TaggedTemplateExpression(node) {
checkUnsafeArguments(node.quasi.expressions, node.tag, node);
},
};
},
});
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