52 lines
1.4 KiB
Plaintext
52 lines
1.4 KiB
Plaintext
==== tests/cases/compiler/assignmentCompatability_checking-call-member-off-of-function-interface.ts (8 errors) ====
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// 3.8.4 Assignment Compatibility
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interface Callable {
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call(blah: any); // also works for 'apply'
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}
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var x: Callable;
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// Should fail
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x = '';
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~
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!!! Type 'string' is not assignable to type 'Callable':
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!!! Property 'call' is missing in type 'String'.
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x = [''];
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~
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!!! Type 'string[]' is not assignable to type 'Callable':
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!!! Property 'call' is missing in type 'string[]'.
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x = 4;
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~
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!!! Type 'number' is not assignable to type 'Callable':
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!!! Property 'call' is missing in type 'Number'.
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x = {};
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~
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!!! Type '{}' is not assignable to type 'Callable':
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!!! Property 'call' is missing in type '{}'.
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// Should work
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function f() { };
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x = f;
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function fn(c: Callable) { }
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// Should Fail
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fn('');
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~~
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!!! Argument of type 'string' is not assignable to parameter of type 'Callable'.
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fn(['']);
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~~~~
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!!! Argument of type 'string[]' is not assignable to parameter of type 'Callable'.
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fn(4);
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~
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!!! Argument of type 'number' is not assignable to parameter of type 'Callable'.
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fn({});
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~~
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!!! Argument of type '{}' is not assignable to parameter of type 'Callable'.
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!!! Property 'call' is missing in type '{}'.
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// Should work
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fn(a => { });
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