From 30112b7202358710becc8ea77f4261dd3e7459f3 Mon Sep 17 00:00:00 2001
From: Philipp Burckhardt <pburckhardt@outlook.com>
Date: Tue, 27 Feb 2024 20:12:29 -0500
Subject: [PATCH] fix: replace use of type guards with boolean return type

The type narrowing behavior of type guards makes only sense when the
runtime checks match the type guards. For example `value is string`
should be used with `typeof value === 'string'` and not with a function
that checks for whether a value is a snakecase string. In the latter
case, the type guard would incorrectly narrow the type of the value to
`never` for a string that is not snakecase.
---
 .../assert/is-absolute-http-uri/docs/types/index.d.ts       | 2 +-
 .../@stdlib/assert/is-absolute-path/docs/types/index.d.ts   | 6 +++---
 .../@stdlib/assert/is-absolute-uri/docs/types/index.d.ts    | 2 +-
 .../@stdlib/assert/is-alphagram/docs/types/index.d.ts       | 2 +-
 .../@stdlib/assert/is-alphanumeric/docs/types/index.d.ts    | 2 +-
 .../@stdlib/assert/is-ascii/docs/types/index.d.ts           | 2 +-
 .../@stdlib/assert/is-binary-string/docs/types/index.d.ts   | 2 +-
 .../@stdlib/assert/is-blank-string/docs/types/index.d.ts    | 2 +-
 .../@stdlib/assert/is-camelcase/docs/types/index.d.ts       | 2 +-
 .../@stdlib/assert/is-capitalized/docs/types/index.d.ts     | 2 +-
 .../@stdlib/assert/is-constantcase/docs/types/index.d.ts    | 2 +-
 .../@stdlib/assert/is-digit-string/docs/types/index.d.ts    | 2 +-
 .../@stdlib/assert/is-domain-name/docs/types/index.d.ts     | 2 +-
 .../@stdlib/assert/is-duration-string/docs/types/index.d.ts | 2 +-
 .../@stdlib/assert/is-email-address/docs/types/index.d.ts   | 2 +-
 .../@stdlib/assert/is-empty-string/docs/types/index.d.ts    | 6 +++---
 .../@stdlib/assert/is-hex-string/docs/types/index.d.ts      | 2 +-
 .../@stdlib/assert/is-json/docs/types/index.d.ts            | 2 +-
 .../@stdlib/assert/is-kebabcase/docs/types/index.d.ts       | 2 +-
 .../@stdlib/assert/is-localhost/docs/types/index.d.ts       | 2 +-
 .../@stdlib/assert/is-lowercase/docs/types/index.d.ts       | 2 +-
 .../@stdlib/assert/is-pascalcase/docs/types/index.d.ts      | 2 +-
 .../@stdlib/assert/is-regexp-string/docs/types/index.d.ts   | 2 +-
 .../@stdlib/assert/is-relative-path/docs/types/index.d.ts   | 6 +++---
 .../@stdlib/assert/is-relative-uri/docs/types/index.d.ts    | 2 +-
 .../@stdlib/assert/is-semver/docs/types/index.d.ts          | 2 +-
 .../@stdlib/assert/is-snakecase/docs/types/index.d.ts       | 2 +-
 .../@stdlib/assert/is-startcase/docs/types/index.d.ts       | 2 +-
 .../@stdlib/assert/is-unc-path/docs/types/index.d.ts        | 2 +-
 .../@stdlib/assert/is-uppercase/docs/types/index.d.ts       | 2 +-
 .../@stdlib/assert/is-uri/docs/types/index.d.ts             | 2 +-
 .../assert/is-well-formed-string/docs/types/index.d.ts      | 6 +++---
 .../@stdlib/assert/is-whitespace/docs/types/index.d.ts      | 2 +-
 33 files changed, 41 insertions(+), 41 deletions(-)

diff --git a/lib/node_modules/@stdlib/assert/is-absolute-http-uri/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-absolute-http-uri/docs/types/index.d.ts
index 91d834de415c..c03a699b8bcb 100644
--- a/lib/node_modules/@stdlib/assert/is-absolute-http-uri/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-absolute-http-uri/docs/types/index.d.ts
@@ -48,7 +48,7 @@
 * var bool = isAbsoluteHttpURI( null );
 * // returns false
 */
-declare function isAbsoluteHttpURI( value: any ): value is string;
+declare function isAbsoluteHttpURI( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-absolute-path/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-absolute-path/docs/types/index.d.ts
index d56f1f609ebe..4e9d45a7c59e 100644
--- a/lib/node_modules/@stdlib/assert/is-absolute-path/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-absolute-path/docs/types/index.d.ts
@@ -39,7 +39,7 @@ interface IsAbsolutePath {
 	*     // returns true
 	* }
 	*/
-	( value: any ): value is string;
+	( value: any ): boolean;
 
 	/**
 	* Tests if a value is a POSIX absolute path.
@@ -55,7 +55,7 @@ interface IsAbsolutePath {
 	* var bool = isAbsolutePath.posix( 'foo/bar/baz' );
 	* // returns false
 	*/
-	posix( value: any ): value is string;
+	posix( value: any ): boolean;
 
 	/**
 	* Tests if a value is a Windows absolute path.
@@ -71,7 +71,7 @@ interface IsAbsolutePath {
 	* var bool = isAbsolutePath.win32( 'foo\\bar\\baz' );
 	* // returns false
 	*/
-	win32( value: any ): value is string;
+	win32( value: any ): boolean;
 }
 
 /**
diff --git a/lib/node_modules/@stdlib/assert/is-absolute-uri/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-absolute-uri/docs/types/index.d.ts
index ed140dc93ac8..99e504633ed2 100644
--- a/lib/node_modules/@stdlib/assert/is-absolute-uri/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-absolute-uri/docs/types/index.d.ts
@@ -44,7 +44,7 @@
 * var bool = isAbsoluteURI( null );
 * // returns false
 */
-declare function isAbsoluteURI( value: any ): value is string;
+declare function isAbsoluteURI( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-alphagram/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-alphagram/docs/types/index.d.ts
index 9b180ec79a4a..90a829085caf 100644
--- a/lib/node_modules/@stdlib/assert/is-alphagram/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-alphagram/docs/types/index.d.ts
@@ -48,7 +48,7 @@
 * var out = isAlphagram( 123 );
 * // returns false
 */
-declare function isAlphagram( value: any ): value is string;
+declare function isAlphagram( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-alphanumeric/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-alphanumeric/docs/types/index.d.ts
index 3cd6a5c7cb85..01d8092cbe0c 100644
--- a/lib/node_modules/@stdlib/assert/is-alphanumeric/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-alphanumeric/docs/types/index.d.ts
@@ -44,7 +44,7 @@
 * var out = isAlphaNumeric( 123 );
 * // returns false
 */
-declare function isAlphaNumeric( value: any ): value is string;
+declare function isAlphaNumeric( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-ascii/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-ascii/docs/types/index.d.ts
index 11e690232bf8..cadf413e6635 100644
--- a/lib/node_modules/@stdlib/assert/is-ascii/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-ascii/docs/types/index.d.ts
@@ -40,7 +40,7 @@
 * var out = isASCII( 123 );
 * // returns false
 */
-declare function isASCII( value: any ): value is string;
+declare function isASCII( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-binary-string/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-binary-string/docs/types/index.d.ts
index 36ad59064c39..34e626a86198 100644
--- a/lib/node_modules/@stdlib/assert/is-binary-string/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-binary-string/docs/types/index.d.ts
@@ -36,7 +36,7 @@
 * var bool = isBinaryString( '' );
 * // returns false
 */
-declare function isBinaryString( value: any ): value is string;
+declare function isBinaryString( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-blank-string/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-blank-string/docs/types/index.d.ts
index 2c1afd53265d..51a07a2d1ada 100644
--- a/lib/node_modules/@stdlib/assert/is-blank-string/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-blank-string/docs/types/index.d.ts
@@ -44,7 +44,7 @@
 * var bool = isBlankString( 'beep' );
 * // returns false
 */
-declare function isBlankString( value: any ): value is string;
+declare function isBlankString( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-camelcase/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-camelcase/docs/types/index.d.ts
index 6db7541fa32f..17f241b39843 100644
--- a/lib/node_modules/@stdlib/assert/is-camelcase/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-camelcase/docs/types/index.d.ts
@@ -40,7 +40,7 @@
 * var bool = isCamelcase( 'hello world' );
 * // returns false
 */
-declare function isCamelcase( value: any ): value is string;
+declare function isCamelcase( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-capitalized/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-capitalized/docs/types/index.d.ts
index 999453716d0e..9175a2690123 100644
--- a/lib/node_modules/@stdlib/assert/is-capitalized/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-capitalized/docs/types/index.d.ts
@@ -40,7 +40,7 @@
 * var bool = isCapitalized( 'salt and light' );
 * // returns false
 */
-declare function isCapitalized( value: any ): value is string;
+declare function isCapitalized( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-constantcase/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-constantcase/docs/types/index.d.ts
index dab26b4f28e4..de574c92d4c7 100644
--- a/lib/node_modules/@stdlib/assert/is-constantcase/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-constantcase/docs/types/index.d.ts
@@ -46,7 +46,7 @@
 * bool = isConstantcase( null );
 * // returns false
 */
-declare function isConstantcase( value: any ): value is string;
+declare function isConstantcase( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-digit-string/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-digit-string/docs/types/index.d.ts
index 42c933b30c60..dc3fed76f62f 100644
--- a/lib/node_modules/@stdlib/assert/is-digit-string/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-digit-string/docs/types/index.d.ts
@@ -40,7 +40,7 @@
 * var out = isDigitString( 123 );
 * // returns false
 */
-declare function isDigitString( value: any ): value is string;
+declare function isDigitString( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-domain-name/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-domain-name/docs/types/index.d.ts
index 13d1a98ac1a9..e1968412a117 100644
--- a/lib/node_modules/@stdlib/assert/is-domain-name/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-domain-name/docs/types/index.d.ts
@@ -32,7 +32,7 @@
 * var bool = isDomainName( 'foo@bar.com' );
 * // returns false
 */
-declare function isDomainName( value: any ): value is string;
+declare function isDomainName( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-duration-string/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-duration-string/docs/types/index.d.ts
index 8f07fc72031e..0ac9bd4149b1 100644
--- a/lib/node_modules/@stdlib/assert/is-duration-string/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-duration-string/docs/types/index.d.ts
@@ -48,7 +48,7 @@
 * var bool = isDurationString( '1d2h' );
 * // returns true
 */
-declare function isDurationString( value: any ): value is string;
+declare function isDurationString( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-email-address/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-email-address/docs/types/index.d.ts
index 2a2a703cc304..7d8db97715e7 100644
--- a/lib/node_modules/@stdlib/assert/is-email-address/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-email-address/docs/types/index.d.ts
@@ -40,7 +40,7 @@
 * var bool = isEmail( null );
 * // returns false
 */
-declare function isEmail( value: any ): value is string;
+declare function isEmail( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-empty-string/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-empty-string/docs/types/index.d.ts
index cb724030ec91..2c08e5712729 100644
--- a/lib/node_modules/@stdlib/assert/is-empty-string/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-empty-string/docs/types/index.d.ts
@@ -40,7 +40,7 @@ interface IsEmptyString {
 	* var bool = isEmptyString( [] );
 	* // returns false
 	*/
-	( value: any ): value is string | String;
+	( value: any ): boolean;
 
 	/**
 	* Tests if a value is an empty string primitive.
@@ -60,7 +60,7 @@ interface IsEmptyString {
 	* var bool = isEmptyString.isPrimitive( [] );
 	* // returns false
 	*/
-	isPrimitive( value: any ): value is string;
+	isPrimitive( value: any ): boolean;
 
 	/**
 	* Tests if a value is an empty string object.
@@ -80,7 +80,7 @@ interface IsEmptyString {
 	* var bool = isEmptyString.isObject( [] );
 	* // returns false
 	*/
-	isObject( value: any ): value is String;
+	isObject( value: any ): boolean;
 }
 
 /**
diff --git a/lib/node_modules/@stdlib/assert/is-hex-string/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-hex-string/docs/types/index.d.ts
index 1172e73d3f51..693ef6e8cf1c 100644
--- a/lib/node_modules/@stdlib/assert/is-hex-string/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-hex-string/docs/types/index.d.ts
@@ -40,7 +40,7 @@
 * var out = isHexString( 123 );
 * // returns false
 */
-declare function isHexString( value: any ): value is string;
+declare function isHexString( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-json/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-json/docs/types/index.d.ts
index e960cc470b91..9623b31a5ce9 100644
--- a/lib/node_modules/@stdlib/assert/is-json/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-json/docs/types/index.d.ts
@@ -32,7 +32,7 @@
 * var v = isJSON( '{a":5}' );
 * // returns false
 */
-declare function isJSON( value: any ): value is string;
+declare function isJSON( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-kebabcase/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-kebabcase/docs/types/index.d.ts
index b244b7df3154..92ebd30858df 100644
--- a/lib/node_modules/@stdlib/assert/is-kebabcase/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-kebabcase/docs/types/index.d.ts
@@ -40,7 +40,7 @@
 * var bool = isKebabcase( 1 );
 * // returns false
 */
-declare function isKebabcase( value: any ): value is string;
+declare function isKebabcase( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-localhost/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-localhost/docs/types/index.d.ts
index 15dbb9016036..ca04c780a778 100644
--- a/lib/node_modules/@stdlib/assert/is-localhost/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-localhost/docs/types/index.d.ts
@@ -50,7 +50,7 @@
 * var bool = isLocalhost( null );
 * // returns false
 */
-declare function isLocalhost( value: any ): value is string;
+declare function isLocalhost( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-lowercase/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-lowercase/docs/types/index.d.ts
index b6f29ca51526..afc801d2526f 100644
--- a/lib/node_modules/@stdlib/assert/is-lowercase/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-lowercase/docs/types/index.d.ts
@@ -40,7 +40,7 @@
 * var bool = isLowercase( '!' );
 * // returns false
 */
-declare function isLowercase( value: any ): value is string;
+declare function isLowercase( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-pascalcase/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-pascalcase/docs/types/index.d.ts
index 0b36e41966c7..5cf98c368bd1 100644
--- a/lib/node_modules/@stdlib/assert/is-pascalcase/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-pascalcase/docs/types/index.d.ts
@@ -40,7 +40,7 @@
 * var bool = isPascalcase( null );
 * // returns false
 */
-declare function isPascalcase( value: any ): value is string;
+declare function isPascalcase( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-regexp-string/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-regexp-string/docs/types/index.d.ts
index 04bca465f698..783edbec7c6a 100644
--- a/lib/node_modules/@stdlib/assert/is-regexp-string/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-regexp-string/docs/types/index.d.ts
@@ -44,7 +44,7 @@
 * var bool = isRegExpString( null );
 * // returns false
 */
-declare function isRegExpString( value: any ): value is string;
+declare function isRegExpString( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-relative-path/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-relative-path/docs/types/index.d.ts
index defb5962cee8..7d20dbbeec90 100644
--- a/lib/node_modules/@stdlib/assert/is-relative-path/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-relative-path/docs/types/index.d.ts
@@ -45,7 +45,7 @@ interface IsRelativePath {
 	*     // returns false
 	* }
 	*/
-	( value: any ): value is string;
+	( value: any ): boolean;
 
 	/**
 	* Tests if a value is a POSIX relative path.
@@ -61,7 +61,7 @@ interface IsRelativePath {
 	* var bool = isRelativePath.posix( '/foo/../bar/baz' );
 	* // returns false
 	*/
-	posix( value: any ): value is string;
+	posix( value: any ): boolean;
 
 	/**
 	* Tests if a value is a Windows relative path.
@@ -77,7 +77,7 @@ interface IsRelativePath {
 	* var bool = isRelativePath.win32( 'C:\\foo\\..\\bar\\baz' );
 	* // returns false
 	*/
-	win32( value: any ): value is string;
+	win32( value: any ): boolean;
 }
 
 /**
diff --git a/lib/node_modules/@stdlib/assert/is-relative-uri/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-relative-uri/docs/types/index.d.ts
index bec5db2e3638..d6404c9534c2 100644
--- a/lib/node_modules/@stdlib/assert/is-relative-uri/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-relative-uri/docs/types/index.d.ts
@@ -40,7 +40,7 @@
 * var bool = isRelativeURI( null );
 * // returns false
 */
-declare function isRelativeURI( value: any ): value is string;
+declare function isRelativeURI( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-semver/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-semver/docs/types/index.d.ts
index c1f2e9bff6b0..ddde4c019711 100644
--- a/lib/node_modules/@stdlib/assert/is-semver/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-semver/docs/types/index.d.ts
@@ -40,7 +40,7 @@
 * var bool = isSemVer( null );
 * // returns false
 */
-declare function isSemVer( value: any ): value is string;
+declare function isSemVer( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-snakecase/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-snakecase/docs/types/index.d.ts
index e2f81856047a..8a339f945426 100644
--- a/lib/node_modules/@stdlib/assert/is-snakecase/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-snakecase/docs/types/index.d.ts
@@ -44,7 +44,7 @@
 * var bool = isSnakecase( null );
 * // returns false
 */
-declare function isSnakecase( value: any ): value is string;
+declare function isSnakecase( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-startcase/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-startcase/docs/types/index.d.ts
index 7e5774b023bd..1458782c163e 100644
--- a/lib/node_modules/@stdlib/assert/is-startcase/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-startcase/docs/types/index.d.ts
@@ -34,7 +34,7 @@
 * bool = isStartcase( 'Beep and Boop' );
 * // returns false
 */
-declare function isStartcase( value: any ): value is string;
+declare function isStartcase( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-unc-path/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-unc-path/docs/types/index.d.ts
index 43f25ce539dc..f47414e781f7 100644
--- a/lib/node_modules/@stdlib/assert/is-unc-path/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-unc-path/docs/types/index.d.ts
@@ -32,7 +32,7 @@
 * var bool = isUNCPath( '/foo/bar/baz' );
 * // returns false
 */
-declare function isUNCPath( value: any ): value is string;
+declare function isUNCPath( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-uppercase/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-uppercase/docs/types/index.d.ts
index 2fc3a54fb7c6..aee6bc79ec7a 100644
--- a/lib/node_modules/@stdlib/assert/is-uppercase/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-uppercase/docs/types/index.d.ts
@@ -40,7 +40,7 @@
 * var bool = isUppercase( 'salt and light' );
 * // returns false
 */
-declare function isUppercase( value: any ): value is string;
+declare function isUppercase( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-uri/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-uri/docs/types/index.d.ts
index de263e43aae3..12366ab19f09 100644
--- a/lib/node_modules/@stdlib/assert/is-uri/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-uri/docs/types/index.d.ts
@@ -119,7 +119,7 @@
 * var bool = isURI( 'http://example.w3.org/%at' );
 * // returns false
 */
-declare function isURI( value: any ): value is string;
+declare function isURI( value: any ): boolean;
 
 
 // EXPORTS //
diff --git a/lib/node_modules/@stdlib/assert/is-well-formed-string/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-well-formed-string/docs/types/index.d.ts
index 734f8ae06eef..3d0a7a9b5091 100644
--- a/lib/node_modules/@stdlib/assert/is-well-formed-string/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-well-formed-string/docs/types/index.d.ts
@@ -56,7 +56,7 @@ interface isWellFormedString {
 	* var bool = isWellFormedString( null );
 	* // returns false
 	*/
-	( str: any ): str is string | String;
+	( str: any ): boolean;
 
 	/**
 	* Tests if a string is a well-formed string primitive.
@@ -72,7 +72,7 @@ interface isWellFormedString {
 	* var bool = isWellFormedString.isPrimitive( new String( '' ) );
 	* // returns false
 	*/
-	isPrimitive( str: any ): str is string;
+	isPrimitive( str: any ): boolean;
 
 	/**
 	* Tests if a string is a well-formed string object.
@@ -88,7 +88,7 @@ interface isWellFormedString {
 	* var bool = isWellFormedString.isObject( new String( '' ) );
 	* // returns true
 	*/
-	isObject( str: any ): str is Object;
+	isObject( str: any ): boolean;
 }
 
 /**
diff --git a/lib/node_modules/@stdlib/assert/is-whitespace/docs/types/index.d.ts b/lib/node_modules/@stdlib/assert/is-whitespace/docs/types/index.d.ts
index 2adafd49194c..3b7dee35d1a7 100644
--- a/lib/node_modules/@stdlib/assert/is-whitespace/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/assert/is-whitespace/docs/types/index.d.ts
@@ -40,7 +40,7 @@
 * var out = isWhitespace( 123 );
 * // returns false
 */
-declare function isWhitespace( x: any ): x is string;
+declare function isWhitespace( x: any ): boolean;
 
 
 // EXPORTS //