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Better nameless parameter implicit any error (#28554)
* Initial version, doesn't work for primitives yet. Need to find out why. * Primitives now work, plus improve error message null and void don't even parse without parameter names so they are not tested. * Codefix: Add names to nameless parameters * Improve error wording * Add detail to error message
1 parent 079f043 commit 6cee7c3

12 files changed

+205
-25
lines changed

‎src/compiler/checker.ts

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@@ -13629,6 +13629,16 @@ namespace ts {
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diagnostic = noImplicitAny ? Diagnostics.Member_0_implicitly_has_an_1_type : Diagnostics.Member_0_implicitly_has_an_1_type_but_a_better_type_may_be_inferred_from_usage;
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break;
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case SyntaxKind.Parameter:
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const param = declaration as ParameterDeclaration;
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if (isIdentifier(param.name) &&
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(isCallSignatureDeclaration(param.parent) || isMethodSignature(param.parent) || isFunctionTypeNode(param.parent)) &&
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param.parent.parameters.indexOf(param) > -1 &&
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(resolveName(param, param.name.escapedText, SymbolFlags.Type, undefined, param.name.escapedText, /*isUse*/ true) ||
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param.name.originalKeywordKind && isTypeNodeKind(param.name.originalKeywordKind))) {
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const newName = "arg" + param.parent.parameters.indexOf(param);
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errorOrSuggestion(noImplicitAny, declaration, Diagnostics.Parameter_has_a_name_but_no_type_Did_you_mean_0_Colon_1, newName, declarationNameToString(param.name));
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return;
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}
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diagnostic = (<ParameterDeclaration>declaration).dotDotDotToken ?
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noImplicitAny ? Diagnostics.Rest_parameter_0_implicitly_has_an_any_type : Diagnostics.Rest_parameter_0_implicitly_has_an_any_type_but_a_better_type_may_be_inferred_from_usage :
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noImplicitAny ? Diagnostics.Parameter_0_implicitly_has_an_1_type : Diagnostics.Parameter_0_implicitly_has_an_1_type_but_a_better_type_may_be_inferred_from_usage;

‎src/compiler/diagnosticMessages.json

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@@ -4125,6 +4125,10 @@
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"category": "Suggestion",
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"code": 7050
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},
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"Parameter has a name but no type. Did you mean '{0}: {1}'?": {
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"category": "Error",
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"code": 7051
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},
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"You cannot rename this element.": {
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"category": "Error",
@@ -4508,6 +4512,10 @@
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"category": "Message",
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"code": 90033
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},
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"Add parameter name": {
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"category": "Message",
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"code": 90034
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},
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"Convert function to an ES2015 class": {
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"category": "Message",
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"code": 95001
@@ -4787,5 +4795,9 @@
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"Add missing 'new' operator to all calls": {
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"category": "Message",
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"code": 95072
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},
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"Add names to all parameters without names": {
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"category": "Message",
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"code": 95073
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}
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}

‎src/compiler/utilities.ts

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@@ -4566,6 +4566,31 @@ namespace ts {
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export function isObjectTypeDeclaration(node: Node): node is ObjectTypeDeclaration {
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return isClassLike(node) || isInterfaceDeclaration(node) || isTypeLiteralNode(node);
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}
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export function isTypeNodeKind(kind: SyntaxKind) {
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return (kind >= SyntaxKind.FirstTypeNode && kind <= SyntaxKind.LastTypeNode)
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|| kind === SyntaxKind.AnyKeyword
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|| kind === SyntaxKind.UnknownKeyword
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|| kind === SyntaxKind.NumberKeyword
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|| kind === SyntaxKind.BigIntKeyword
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|| kind === SyntaxKind.ObjectKeyword
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|| kind === SyntaxKind.BooleanKeyword
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|| kind === SyntaxKind.StringKeyword
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|| kind === SyntaxKind.SymbolKeyword
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|| kind === SyntaxKind.ThisKeyword
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|| kind === SyntaxKind.VoidKeyword
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|| kind === SyntaxKind.UndefinedKeyword
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|| kind === SyntaxKind.NullKeyword
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|| kind === SyntaxKind.NeverKeyword
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|| kind === SyntaxKind.ExpressionWithTypeArguments
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|| kind === SyntaxKind.JSDocAllType
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|| kind === SyntaxKind.JSDocUnknownType
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|| kind === SyntaxKind.JSDocNullableType
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|| kind === SyntaxKind.JSDocNonNullableType
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|| kind === SyntaxKind.JSDocOptionalType
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|| kind === SyntaxKind.JSDocFunctionType
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|| kind === SyntaxKind.JSDocVariadicType;
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}
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}
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namespace ts {
@@ -6289,31 +6314,6 @@ namespace ts {
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// Type
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6292-
function isTypeNodeKind(kind: SyntaxKind) {
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return (kind >= SyntaxKind.FirstTypeNode && kind <= SyntaxKind.LastTypeNode)
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|| kind === SyntaxKind.AnyKeyword
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|| kind === SyntaxKind.UnknownKeyword
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|| kind === SyntaxKind.NumberKeyword
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|| kind === SyntaxKind.BigIntKeyword
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|| kind === SyntaxKind.ObjectKeyword
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|| kind === SyntaxKind.BooleanKeyword
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|| kind === SyntaxKind.StringKeyword
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|| kind === SyntaxKind.SymbolKeyword
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|| kind === SyntaxKind.ThisKeyword
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|| kind === SyntaxKind.VoidKeyword
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|| kind === SyntaxKind.UndefinedKeyword
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|| kind === SyntaxKind.NullKeyword
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|| kind === SyntaxKind.NeverKeyword
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|| kind === SyntaxKind.ExpressionWithTypeArguments
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|| kind === SyntaxKind.JSDocAllType
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|| kind === SyntaxKind.JSDocUnknownType
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|| kind === SyntaxKind.JSDocNullableType
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|| kind === SyntaxKind.JSDocNonNullableType
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|| kind === SyntaxKind.JSDocOptionalType
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|| kind === SyntaxKind.JSDocFunctionType
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|| kind === SyntaxKind.JSDocVariadicType;
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}
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/**
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* Node test that determines whether a node is a valid type node.
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* This differs from the `isPartOfTypeNode` function which determines whether a node is *part*

‎src/services/codefixes/addNameToNamelessParameter.ts

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@@ -0,0 +1,37 @@
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/* @internal */
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namespace ts.codefix {
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const fixId = "addNameToNamelessParameter";
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const errorCodes = [Diagnostics.Parameter_has_a_name_but_no_type_Did_you_mean_0_Colon_1.code];
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registerCodeFix({
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errorCodes,
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getCodeActions: (context) => {
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const changes = textChanges.ChangeTracker.with(context, t => makeChange(t, context.sourceFile, context.span.start));
9+
return [createCodeFixAction(fixId, changes, Diagnostics.Add_parameter_name, fixId, Diagnostics.Add_names_to_all_parameters_without_names)];
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},
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fixIds: [fixId],
12+
getAllCodeActions: context => codeFixAll(context, errorCodes, (changes, diag) => makeChange(changes, diag.file, diag.start)),
13+
});
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15+
function makeChange(changeTracker: textChanges.ChangeTracker, sourceFile: SourceFile, pos: number) {
16+
const token = getTokenAtPosition(sourceFile, pos);
17+
if (!isIdentifier(token)) {
18+
return Debug.fail("add-name-to-nameless-parameter operates on identifiers, but got a " + formatSyntaxKind(token.kind));
19+
}
20+
const param = token.parent;
21+
if (!isParameter(param)) {
22+
return Debug.fail("Tried to add a parameter name to a non-parameter: " + formatSyntaxKind(token.kind));
23+
}
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const i = param.parent.parameters.indexOf(param);
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Debug.assert(!param.type, "Tried to add a parameter name to a parameter that already had one.");
26+
Debug.assert(i > -1, "Parameter not found in parent parameter list.");
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const replacement = createParameter(
28+
/*decorators*/ undefined,
29+
param.modifiers,
30+
param.dotDotDotToken,
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"arg" + i,
32+
param.questionToken,
33+
createTypeReferenceNode(token, /*typeArguments*/ undefined),
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param.initializer);
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changeTracker.replaceNode(sourceFile, token, replacement);
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}
37+
}

‎src/services/tsconfig.json

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@@ -45,6 +45,7 @@
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"refactorProvider.ts",
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"codefixes/addConvertToUnknownForNonOverlappingTypes.ts",
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"codefixes/addMissingInvocationForDecorator.ts",
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"codefixes/addNameToNamelessParameter.ts",
4849
"codefixes/annotateWithTypeFromJSDoc.ts",
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"codefixes/inferFromUsage.ts",
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"codefixes/convertFunctionToEs6Class.ts",

‎tests/baselines/reference/noImplicitAnyNamelessParameter.errors.txt

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tests/cases/compiler/noImplicitAnyNamelessParameter.ts(2,17): error TS7051: Parameter has a name but no type. Did you mean 'arg0: string'?
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tests/cases/compiler/noImplicitAnyNamelessParameter.ts(2,25): error TS7051: Parameter has a name but no type. Did you mean 'arg1: C'?
3+
tests/cases/compiler/noImplicitAnyNamelessParameter.ts(3,19): error TS7051: Parameter has a name but no type. Did you mean 'arg0: C'?
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tests/cases/compiler/noImplicitAnyNamelessParameter.ts(3,22): error TS7051: Parameter has a name but no type. Did you mean 'arg1: number'?
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tests/cases/compiler/noImplicitAnyNamelessParameter.ts(4,20): error TS7051: Parameter has a name but no type. Did you mean 'arg0: boolean'?
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tests/cases/compiler/noImplicitAnyNamelessParameter.ts(4,29): error TS7051: Parameter has a name but no type. Did you mean 'arg1: C'?
7+
tests/cases/compiler/noImplicitAnyNamelessParameter.ts(4,32): error TS7051: Parameter has a name but no type. Did you mean 'arg2: object'?
8+
tests/cases/compiler/noImplicitAnyNamelessParameter.ts(4,40): error TS7051: Parameter has a name but no type. Did you mean 'arg3: undefined'?
9+
10+
11+
==== tests/cases/compiler/noImplicitAnyNamelessParameter.ts (8 errors) ====
12+
class C { }
13+
declare var x: (string, C) => void;
14+
~~~~~~
15+
!!! error TS7051: Parameter has a name but no type. Did you mean 'arg0: string'?
16+
~
17+
!!! error TS7051: Parameter has a name but no type. Did you mean 'arg1: C'?
18+
declare var y: { (C, number): void };
19+
~
20+
!!! error TS7051: Parameter has a name but no type. Did you mean 'arg0: C'?
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~~~~~~
22+
!!! error TS7051: Parameter has a name but no type. Did you mean 'arg1: number'?
23+
declare var z: { m(boolean, C, object, undefined): void }
24+
~~~~~~~
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!!! error TS7051: Parameter has a name but no type. Did you mean 'arg0: boolean'?
26+
~
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!!! error TS7051: Parameter has a name but no type. Did you mean 'arg1: C'?
28+
~~~~~~
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!!! error TS7051: Parameter has a name but no type. Did you mean 'arg2: object'?
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~~~~~~~~~
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!!! error TS7051: Parameter has a name but no type. Did you mean 'arg3: undefined'?
32+
// note: null and void do not parse correctly without a preceding parameter name
33+

‎tests/baselines/reference/noImplicitAnyNamelessParameter.js

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//// [noImplicitAnyNamelessParameter.ts]
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class C { }
3+
declare var x: (string, C) => void;
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declare var y: { (C, number): void };
5+
declare var z: { m(boolean, C, object, undefined): void }
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// note: null and void do not parse correctly without a preceding parameter name
7+
8+
9+
//// [noImplicitAnyNamelessParameter.js]
10+
var C = /** @class */ (function () {
11+
function C() {
12+
}
13+
return C;
14+
}());
15+
// note: null and void do not parse correctly without a preceding parameter name

‎tests/baselines/reference/noImplicitAnyNamelessParameter.symbols

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=== tests/cases/compiler/noImplicitAnyNamelessParameter.ts ===
2+
class C { }
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>C : Symbol(C, Decl(noImplicitAnyNamelessParameter.ts, 0, 0))
4+
5+
declare var x: (string, C) => void;
6+
>x : Symbol(x, Decl(noImplicitAnyNamelessParameter.ts, 1, 11))
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>string : Symbol(string, Decl(noImplicitAnyNamelessParameter.ts, 1, 16))
8+
>C : Symbol(C, Decl(noImplicitAnyNamelessParameter.ts, 1, 23))
9+
10+
declare var y: { (C, number): void };
11+
>y : Symbol(y, Decl(noImplicitAnyNamelessParameter.ts, 2, 11))
12+
>C : Symbol(C, Decl(noImplicitAnyNamelessParameter.ts, 2, 18))
13+
>number : Symbol(number, Decl(noImplicitAnyNamelessParameter.ts, 2, 20))
14+
15+
declare var z: { m(boolean, C, object, undefined): void }
16+
>z : Symbol(z, Decl(noImplicitAnyNamelessParameter.ts, 3, 11))
17+
>m : Symbol(m, Decl(noImplicitAnyNamelessParameter.ts, 3, 16))
18+
>boolean : Symbol(boolean, Decl(noImplicitAnyNamelessParameter.ts, 3, 19))
19+
>C : Symbol(C, Decl(noImplicitAnyNamelessParameter.ts, 3, 27))
20+
>object : Symbol(object, Decl(noImplicitAnyNamelessParameter.ts, 3, 30))
21+
>undefined : Symbol(undefined, Decl(noImplicitAnyNamelessParameter.ts, 3, 38))
22+
23+
// note: null and void do not parse correctly without a preceding parameter name
24+

‎tests/baselines/reference/noImplicitAnyNamelessParameter.types

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=== tests/cases/compiler/noImplicitAnyNamelessParameter.ts ===
2+
class C { }
3+
>C : C
4+
5+
declare var x: (string, C) => void;
6+
>x : (string: any, C: any) => void
7+
>string : any
8+
>C : any
9+
10+
declare var y: { (C, number): void };
11+
>y : (C: any, number: any) => void
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>C : any
13+
>number : any
14+
15+
declare var z: { m(boolean, C, object, undefined): void }
16+
>z : { m(boolean: any, C: any, object: any, undefined: any): void; }
17+
>m : (boolean: any, C: any, object: any, undefined: any) => void
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>boolean : any
19+
>C : any
20+
>object : any
21+
>undefined : any
22+
23+
// note: null and void do not parse correctly without a preceding parameter name
24+

‎tests/cases/compiler/noImplicitAnyNamelessParameter.ts

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1+
// @noImplicitAny: true
2+
class C { }
3+
declare var x: (string, C) => void;
4+
declare var y: { (C, number): void };
5+
declare var z: { m(boolean, C, object, undefined): void }
6+
// note: null and void do not parse correctly without a preceding parameter name

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