isValidMethodAccess: Instantiate signature this type if necessary#21722
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ghost
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Feb 7, 2018
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| function createInferenceContext(signature: Signature, flags: InferenceFlags, compareTypes?: TypeComparer, baseInferences?: InferenceInfo[]): InferenceContext { | ||
| const inferences = baseInferences ? map(baseInferences, cloneInferenceInfo) : map(signature.typeParameters, createInferenceInfo); | ||
| const inferences = baseInferences ? baseInferences.map(cloneInferenceInfo) : signature.typeParameters.map(createInferenceInfo); |
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Looks like this function should never be called if signature.typeParameters is undefined, since we expect inferences to always be defined elsewhere.
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sandersn
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Mar 6, 2018
| return signatureThisType; | ||
| } | ||
| const context = createInferenceContext(sig.typeParameters, sig, InferenceFlags.None); | ||
| inferTypes(context.inferences, actualThisType, signatureThisType); |
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It's a little weird to do limited inference here, but maybe it makes sense because this is called solely for completions? The inference and instantiation will happen later, and lead to an error, in normal compilation.
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Since the call expression doesn't actually exist (we're just considering adding the completion, all that exists so far is obj.), this won't have a corresponding normal compilation.
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Fixes #21711