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DanielRosenwasserDanielRosenwasser
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Merge pull request #27020 from Kingwl/improve_accidentally_calling_type-assertion_expressions
improve Diagnostics for accidentally calling type-assertion expressions
2 parents e1daa47 + 2cf2bbd commit aa9230f

7 files changed

+179
-6
lines changed

‎src/compiler/checker.ts

Lines changed: 14 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -19672,7 +19672,14 @@ namespace ts {
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error(node, Diagnostics.Value_of_type_0_is_not_callable_Did_you_mean_to_include_new, typeToString(funcType));
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}
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else {
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invocationError(node, apparentType, SignatureKind.Call);
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let relatedInformation: DiagnosticRelatedInformation | undefined;
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if (node.arguments.length === 1 && isTypeAssertion(first(node.arguments))) {
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const text = getSourceFileOfNode(node).text;
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if (isLineBreak(text.charCodeAt(skipTrivia(text, node.expression.end, /* stopAfterLineBreak */ true) - 1))) {
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relatedInformation = createDiagnosticForNode(node.expression, Diagnostics.It_is_highly_likely_that_you_are_missing_a_semicolon);
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}
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}
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invocationError(node, apparentType, SignatureKind.Call, relatedInformation);
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}
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return resolveErrorCall(node);
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}
@@ -19842,11 +19849,12 @@ namespace ts {
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return true;
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}
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19845-
function invocationError(node: Node, apparentType: Type, kind: SignatureKind) {
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invocationErrorRecovery(apparentType, kind, error(node, kind === SignatureKind.Call
19847-
? Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures
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: Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature
19849-
, typeToString(apparentType)));
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function invocationError(node: Node, apparentType: Type, kind: SignatureKind, relatedInformation?: DiagnosticRelatedInformation) {
19853+
const diagnostic = error(node, (kind === SignatureKind.Call ?
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Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures :
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Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature
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), typeToString(apparentType));
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invocationErrorRecovery(apparentType, kind, relatedInformation ? addRelatedInfo(diagnostic, relatedInformation) : diagnostic);
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}
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function invocationErrorRecovery(apparentType: Type, kind: SignatureKind, diagnostic: Diagnostic) {

‎src/compiler/diagnosticMessages.json

Lines changed: 4 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -2457,6 +2457,10 @@
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"category": "Error",
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"code": 2733
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},
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"It is highly likely that you are missing a semicolon.": {
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"category": "Error",
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"code": 2734
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},
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"Import declaration '{0}' is using private name '{1}'.": {
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"category": "Error",

‎tests/baselines/reference/betterErrorForAccidentallyCallingTypeAssertionExpressions.errors.txt

Lines changed: 39 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,39 @@
1+
tests/cases/compiler/betterErrorForAccidentallyCallingTypeAssertionExpressions.ts(3,1): error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'String' has no compatible call signatures.
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tests/cases/compiler/betterErrorForAccidentallyCallingTypeAssertionExpressions.ts(5,1): error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'String' has no compatible call signatures.
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tests/cases/compiler/betterErrorForAccidentallyCallingTypeAssertionExpressions.ts(7,1): error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'String' has no compatible call signatures.
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tests/cases/compiler/betterErrorForAccidentallyCallingTypeAssertionExpressions.ts(10,1): error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'String' has no compatible call signatures.
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tests/cases/compiler/betterErrorForAccidentallyCallingTypeAssertionExpressions.ts(13,1): error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'String' has no compatible call signatures.
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==== tests/cases/compiler/betterErrorForAccidentallyCallingTypeAssertionExpressions.ts (5 errors) ====
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declare function foo(): string;
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foo()(1 as number).toString();
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~~~~~~~~~~~~~~~~~~
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!!! error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'String' has no compatible call signatures.
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foo() (1 as number).toString();
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~~~~~~~~~~~~~~~~~~~~~
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!!! error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'String' has no compatible call signatures.
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foo()
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~~~~~
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(1 as number).toString();
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~~~~~~~~~~~~~
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!!! error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'String' has no compatible call signatures.
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!!! related TS2734 tests/cases/compiler/betterErrorForAccidentallyCallingTypeAssertionExpressions.ts:7:1: It is highly likely that you are missing a semicolon.
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foo()
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~~~~~~~~
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(1 as number).toString();
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~~~~~~~~~~~~~~~~~
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!!! error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'String' has no compatible call signatures.
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!!! related TS2734 tests/cases/compiler/betterErrorForAccidentallyCallingTypeAssertionExpressions.ts:10:1: It is highly likely that you are missing a semicolon.
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foo()
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~~~~~~~~
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(<number>1).toString();
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~~~~~~~~~~~~~~~
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!!! error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'String' has no compatible call signatures.
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!!! related TS2734 tests/cases/compiler/betterErrorForAccidentallyCallingTypeAssertionExpressions.ts:13:1: It is highly likely that you are missing a semicolon.
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‎tests/baselines/reference/betterErrorForAccidentallyCallingTypeAssertionExpressions.js

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@@ -0,0 +1,23 @@
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//// [betterErrorForAccidentallyCallingTypeAssertionExpressions.ts]
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declare function foo(): string;
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foo()(1 as number).toString();
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foo() (1 as number).toString();
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foo()
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(1 as number).toString();
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foo()
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(1 as number).toString();
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foo()
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(<number>1).toString();
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17+
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//// [betterErrorForAccidentallyCallingTypeAssertionExpressions.js]
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foo()(1).toString();
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foo()(1).toString();
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foo()(1).toString();
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foo()(1).toString();
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foo()(1).toString();

‎tests/baselines/reference/betterErrorForAccidentallyCallingTypeAssertionExpressions.symbols

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@@ -0,0 +1,25 @@
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=== tests/cases/compiler/betterErrorForAccidentallyCallingTypeAssertionExpressions.ts ===
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declare function foo(): string;
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>foo : Symbol(foo, Decl(betterErrorForAccidentallyCallingTypeAssertionExpressions.ts, 0, 0))
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foo()(1 as number).toString();
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>foo : Symbol(foo, Decl(betterErrorForAccidentallyCallingTypeAssertionExpressions.ts, 0, 0))
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foo() (1 as number).toString();
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>foo : Symbol(foo, Decl(betterErrorForAccidentallyCallingTypeAssertionExpressions.ts, 0, 0))
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foo()
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>foo : Symbol(foo, Decl(betterErrorForAccidentallyCallingTypeAssertionExpressions.ts, 0, 0))
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(1 as number).toString();
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foo()
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>foo : Symbol(foo, Decl(betterErrorForAccidentallyCallingTypeAssertionExpressions.ts, 0, 0))
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(1 as number).toString();
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foo()
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>foo : Symbol(foo, Decl(betterErrorForAccidentallyCallingTypeAssertionExpressions.ts, 0, 0))
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(<number>1).toString();
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‎tests/baselines/reference/betterErrorForAccidentallyCallingTypeAssertionExpressions.types

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@@ -0,0 +1,60 @@
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=== tests/cases/compiler/betterErrorForAccidentallyCallingTypeAssertionExpressions.ts ===
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declare function foo(): string;
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>foo : () => string
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foo()(1 as number).toString();
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>foo()(1 as number).toString() : any
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>foo()(1 as number).toString : any
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>foo()(1 as number) : any
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>foo() : string
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>foo : () => string
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>1 as number : number
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>1 : 1
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>toString : any
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foo() (1 as number).toString();
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>foo() (1 as number).toString() : any
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>foo() (1 as number).toString : any
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>foo() (1 as number) : any
19+
>foo() : string
20+
>foo : () => string
21+
>1 as number : number
22+
>1 : 1
23+
>toString : any
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foo()
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>foo()(1 as number).toString() : any
27+
>foo()(1 as number).toString : any
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>foo()(1 as number) : any
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>foo() : string
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>foo : () => string
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(1 as number).toString();
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>1 as number : number
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>1 : 1
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>toString : any
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foo()
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>foo() (1 as number).toString() : any
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>foo() (1 as number).toString : any
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>foo() (1 as number) : any
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>foo() : string
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>foo : () => string
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(1 as number).toString();
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>1 as number : number
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>1 : 1
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>toString : any
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49+
foo()
50+
>foo() (<number>1).toString() : any
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>foo() (<number>1).toString : any
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>foo() (<number>1) : any
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>foo() : string
54+
>foo : () => string
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56+
(<number>1).toString();
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><number>1 : number
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>1 : 1
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>toString : any
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‎tests/cases/compiler/betterErrorForAccidentallyCallingTypeAssertionExpressions.ts

Lines changed: 14 additions & 0 deletions
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@@ -0,0 +1,14 @@
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declare function foo(): string;
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foo()(1 as number).toString();
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foo() (1 as number).toString();
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foo()
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(1 as number).toString();
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foo()
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(1 as number).toString();
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foo()
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(<number>1).toString();

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