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fix(experimental-utils): fix eslint-utils' negative predicates' return types #3462

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merged 1 commit into from Jun 17, 2021
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fix(experimental-utils): fix eslint-utils' negative predicates' return types #3462

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11 changes: 9 additions & 2 deletions packages/experimental-utils/src/ast-utils/predicates.ts
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Expand Up @@ -5,7 +5,12 @@ function isOptionalChainPunctuator(
): token is TSESTree.PunctuatorToken & { value: '?.' } {
return token.type === AST_TOKEN_TYPES.Punctuator && token.value === '?.';
}
function isNotOptionalChainPunctuator(token: TSESTree.Token): boolean {
function isNotOptionalChainPunctuator(
token: TSESTree.Token,
): token is Exclude<
TSESTree.Token,
TSESTree.PunctuatorToken & { value: '?.' }
> {
return !isOptionalChainPunctuator(token);
}

Expand All @@ -14,7 +19,9 @@ function isNonNullAssertionPunctuator(
): token is TSESTree.PunctuatorToken & { value: '!' } {
return token.type === AST_TOKEN_TYPES.Punctuator && token.value === '!';
}
function isNotNonNullAssertionPunctuator(token: TSESTree.Token): boolean {
function isNotNonNullAssertionPunctuator(
token: TSESTree.Token,
): token is Exclude<TSESTree.Token, TSESTree.PunctuatorToken & { value: '!' }> {
return !isNonNullAssertionPunctuator(token);
}

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