diff --git a/lib/node_modules/@stdlib/string/code-point-at/README.md b/lib/node_modules/@stdlib/string/code-point-at/README.md
new file mode 100644
index 000000000000..33296f358967
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/code-point-at/README.md
@@ -0,0 +1,190 @@
+
+
+# codePointAt
+
+> Return a Unicode [code point][code-point] from a string at a specified position.
+
+
+
+
+
+
+
+
+
+
+
+## Usage
+
+```javascript
+var codePointAt = require( '@stdlib/string/code-point-at' );
+```
+
+#### codePointAt( string, position\[, backward] )
+
+Returns a Unicode [code point][code-point] from a string at a specified position.
+
+```javascript
+var out = codePointAt( 'last man standing', 4 );
+// returns 32
+```
+
+The function supports providing a `boolean` argument for performing backward iteration for low surrogates.
+
+```javascript
+var out = codePointAt( '🌷', 1, true );
+// returns 127799
+```
+
+
+
+
+
+
+
+
+
+## Notes
+
+This function differs from [`String.codePointAt`][mdn-string-codepointat] in the following ways:
+
+- The function supports providing a `boolean` argument for performing backward iteration for low surrogates. [`String.codePointAt`][mdn-string-codepointat] simply returns the low surrogate value if no [UTF-16][utf-16] surrogate pair begins at the specified position. If invoked with `backward` set to `true`, this function will return the code point after aggregating with the preceding high surrogate, if the specified position does not mark the start of a surrogate pair.
+
+
+
+
+
+
+
+
+
+## Examples
+
+
+
+```javascript
+var codePointAt = require( '@stdlib/string/code-point-at' );
+
+console.log( codePointAt( 'last man standing', 4 ) );
+// => 32
+
+console.log( codePointAt( 'presidential election', 8, true ) );
+// => 116
+
+console.log( codePointAt( 'अनुच्छेद', 2 ) );
+// => 2369
+
+console.log( codePointAt( '🌷', 1, true ) );
+// => 127799
+```
+
+
+
+
+
+
+
+* * *
+
+
+
+## CLI
+
+
+
+
+
+### Usage
+
+```text
+Usage: code-point-at [options] [] --pos=
+
+Options:
+
+ -h, --help Print this message.
+ -V, --version Print the package version.
+ -b, --backward Backward iteration for low surrogates.
+ --pos index Position in string.
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+### Examples
+
+```bash
+$ code-point-at --pos=2 अनुच्छेद
+2369
+```
+
+To use as a [standard stream][standard-streams],
+
+```bash
+$ echo -n 'अनुच्छेद' | code-point-at --pos=2
+2369
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+[code-point]: https://en.wikipedia.org/wiki/Code_point
+
+[standard-streams]: https://en.wikipedia.org/wiki/Standard_streams
+
+[mdn-string-codepointat]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/codePointAt
+
+[utf-16]: https://en.wikipedia.org/wiki/UTF-16
+
+
+
+
diff --git a/lib/node_modules/@stdlib/string/code-point-at/benchmark/benchmark.js b/lib/node_modules/@stdlib/string/code-point-at/benchmark/benchmark.js
new file mode 100644
index 000000000000..9e03d10f3b42
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/code-point-at/benchmark/benchmark.js
@@ -0,0 +1,82 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2020 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var randu = require( '@stdlib/random/base/randu' );
+var floor = require( '@stdlib/math/base/special/floor' );
+var fromCodePoint = require( '@stdlib/string/from-code-point' );
+var isNonNegativeInteger = require( '@stdlib/assert/is-nonnegative-integer' ).isPrimitive;
+var UNICODE_MAX = require( '@stdlib/constants/string/unicode-max' );
+var pkg = require( './../package.json' ).name;
+var codePointAt = require( './../lib' );
+
+
+// VARIABLES //
+
+var opts = {
+ 'skip': ( typeof String.prototype.codePointAt !== 'function' )
+};
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+ var out;
+ var x;
+ var i;
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ x = floor( randu() * UNICODE_MAX );
+ out = codePointAt( fromCodePoint( x ), 0 );
+ if ( typeof out !== 'number' ) {
+ b.fail( 'should return a number' );
+ }
+ }
+ b.toc();
+ if ( !isNonNegativeInteger( out ) ) {
+ b.fail( 'should return a nonnegative integer' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
+
+bench( pkg+'::built-in', opts, function benchmark( b ) {
+ var out;
+ var x;
+ var i;
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ x = floor( randu() * UNICODE_MAX );
+ out = String.prototype.codePointAt.call( fromCodePoint( x ), 0 );
+ if ( typeof out !== 'number' ) {
+ b.fail( 'should return a number' );
+ }
+ }
+ b.toc();
+ if ( !isNonNegativeInteger( out ) ) {
+ b.fail( 'should return a nonnegative integer' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
diff --git a/lib/node_modules/@stdlib/string/code-point-at/bin/cli b/lib/node_modules/@stdlib/string/code-point-at/bin/cli
new file mode 100755
index 000000000000..dcd139e845f8
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/code-point-at/bin/cli
@@ -0,0 +1,87 @@
+#!/usr/bin/env node
+
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2020 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var resolve = require( 'path' ).resolve;
+var readFileSync = require( '@stdlib/fs/read-file' ).sync;
+var CLI = require( '@stdlib/tools/cli' );
+var stdin = require( '@stdlib/process/read-stdin' );
+var codePointAt = require( './../lib' );
+
+
+// MAIN //
+
+/**
+* Main execution sequence.
+*
+* @private
+* @returns {void}
+*/
+function main() {
+ var flags;
+ var args;
+ var cli;
+ var pos;
+
+ // Create a command-line interface:
+ cli = new CLI({
+ 'pkg': require( './../package.json' ),
+ 'options': require( './../etc/cli_opts.json' ),
+ 'help': readFileSync( resolve( __dirname, '..', 'docs', 'usage.txt' ), {
+ 'encoding': 'utf8'
+ })
+ });
+
+ // Get any provided command-line options:
+ flags = cli.flags();
+ if ( flags.help || flags.version ) {
+ return;
+ }
+ pos = parseInt( flags.pos, 10 );
+
+ // Get any provided command-line arguments:
+ args = cli.args();
+
+ // Check if we are receiving data from `stdin`...
+ if ( process.stdin.isTTY ) {
+ return console.log( codePointAt( args[ 0 ], pos, flags.backward ) ); // eslint-disable-line no-console
+ }
+ return stdin( onRead );
+
+ /**
+ * Callback invoked upon reading from `stdin`.
+ *
+ * @private
+ * @param {(Error|null)} error - error object
+ * @param {Buffer} data - data
+ * @returns {void}
+ */
+ function onRead( error, data ) {
+ if ( error ) {
+ return cli.error( error );
+ }
+ console.log( codePointAt( data.toString(), pos, flags.backward ) ); // eslint-disable-line no-console
+ }
+}
+
+main();
diff --git a/lib/node_modules/@stdlib/string/code-point-at/docs/repl.txt b/lib/node_modules/@stdlib/string/code-point-at/docs/repl.txt
new file mode 100644
index 000000000000..ca79247e8722
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/code-point-at/docs/repl.txt
@@ -0,0 +1,33 @@
+
+{{alias}}( str, idx[, backward] )
+ Returns a Unicode code point from a string at a specified position.
+
+ Parameters
+ ----------
+ str: string
+ Input string.
+
+ idx: integer
+ Position.
+
+ backward: boolean (optional)
+ Backward iteration for low surrogates.
+
+ Returns
+ -------
+ out: integer
+ Unicode code point.
+
+ Examples
+ --------
+ > var out = {{alias}}( 'last man standing', 4 )
+ 32
+ > out = {{alias}}( 'presidential election', 8, true )
+ 116
+ > out = {{alias}}( 'अनुच्छेद', 2 )
+ 2369
+ > out = {{alias}}( '🌷', 1, true )
+ 127799
+
+ See Also
+ --------
diff --git a/lib/node_modules/@stdlib/string/code-point-at/docs/types/index.d.ts b/lib/node_modules/@stdlib/string/code-point-at/docs/types/index.d.ts
new file mode 100644
index 000000000000..1fc6118fef13
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/code-point-at/docs/types/index.d.ts
@@ -0,0 +1,45 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2020 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+// TypeScript Version: 2.0
+
+/**
+* Returns a Unicode code point from a string at specified position.
+*
+* @param str - input string
+* @param idx - position
+* @param backward - backward iteration for low surrogates (default: false)
+* @throws first argument must be a string
+* @throws second argument must be a nonnegative integer
+* @throws third argument must be a boolean
+* @throws position must be a valid index in string
+* @returns code point
+*
+* @example
+* var str = codePointAt( 'अनुच्छेद', 2 );
+* // returns 2369
+*
+* str = codePointAt( '🌷', 1, true );
+* // returns 127799
+*/
+declare function codePointAt( str: string, idx: number, backward?: boolean ): number; // tslint:disable-line:max-line-length
+
+
+// EXPORTS //
+
+export = codePointAt;
diff --git a/lib/node_modules/@stdlib/string/code-point-at/docs/types/test.ts b/lib/node_modules/@stdlib/string/code-point-at/docs/types/test.ts
new file mode 100644
index 000000000000..493a2cd6586f
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/code-point-at/docs/types/test.ts
@@ -0,0 +1,50 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2020 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+import codePointAt = require( './index' );
+
+
+// TESTS //
+
+// The function returns a number...
+{
+ codePointAt( 'last man standing', 4 ); // $ExpectType number
+ codePointAt( 'presidential election', 8, true ); // $ExpectType number
+ codePointAt( 'अनुच्छेद', 2 ); // $ExpectType number
+ codePointAt( '🌷', 1, true ); // $ExpectType number
+}
+
+// The function does not compile if provided incorrect arguments...
+{
+ codePointAt( false, 3 ); // $ExpectError
+ codePointAt( {}, 3 ); // $ExpectError
+ codePointAt( ( x: number ): number => x, 3 ); // $ExpectError
+
+ codePointAt( 'string', true ); // $ExpectError
+ codePointAt( 'string', false ); // $ExpectError
+ codePointAt( 'string', {} ); // $ExpectError
+ codePointAt( 'string', ( x: number ): number => x ); // $ExpectError
+
+ codePointAt( 'string', 2, {} ); // $ExpectError
+ codePointAt( 'string', 2, ( x: number ): number => x ); // $ExpectError
+}
+
+// The function does not compile if provided insufficient arguments...
+{
+ codePointAt(); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/string/code-point-at/docs/usage.txt b/lib/node_modules/@stdlib/string/code-point-at/docs/usage.txt
new file mode 100644
index 000000000000..7f67b3974731
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/code-point-at/docs/usage.txt
@@ -0,0 +1,9 @@
+
+Usage: code-point-at [options] [] --pos=
+
+Options:
+
+ -h, --help Print this message.
+ -V, --version Print the package version.
+ -b, --backward Backward iteration for low surrogates.
+ --pos index Position in string.
diff --git a/lib/node_modules/@stdlib/string/code-point-at/etc/cli_opts.json b/lib/node_modules/@stdlib/string/code-point-at/etc/cli_opts.json
new file mode 100644
index 000000000000..755174f8622b
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/code-point-at/etc/cli_opts.json
@@ -0,0 +1,21 @@
+{
+ "string": [
+ "pos"
+ ],
+ "boolean": [
+ "help",
+ "version",
+ "backward"
+ ],
+ "alias": {
+ "help": [
+ "h"
+ ],
+ "version": [
+ "V"
+ ],
+ "backward": [
+ "b"
+ ]
+ }
+}
diff --git a/lib/node_modules/@stdlib/string/code-point-at/examples/index.js b/lib/node_modules/@stdlib/string/code-point-at/examples/index.js
new file mode 100644
index 000000000000..787f5c0081ee
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/code-point-at/examples/index.js
@@ -0,0 +1,33 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2020 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+var codePointAt = require( './../lib' );
+
+console.log( codePointAt( 'last man standing', 4 ) );
+// => 32
+
+console.log( codePointAt( 'presidential election', 8, true ) );
+// => 116
+
+console.log( codePointAt( 'अनुच्छेद', 2 ) );
+// => 2369
+
+console.log( codePointAt( '🌷', 1, true ) );
+// => 127799
diff --git a/lib/node_modules/@stdlib/string/code-point-at/lib/index.js b/lib/node_modules/@stdlib/string/code-point-at/lib/index.js
new file mode 100644
index 000000000000..56b0a15dbcbd
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/code-point-at/lib/index.js
@@ -0,0 +1,43 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2020 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+/**
+* Return a Unicode code point from a string at a specified position.
+*
+* @module @stdlib/string/code-point-at
+*
+* @example
+* var codePointAt = require( '@stdlib/string/code-point-at' );
+*
+* var out = codePointAt( 'अनुच्छेद', 2 );
+* // returns 2369
+*
+* out = codePointAt( '🌷', 1, true );
+* // returns 127799
+*/
+
+// MODULES //
+
+var codePointAt = require( './main.js' );
+
+
+// EXPORTS //
+
+module.exports = codePointAt;
diff --git a/lib/node_modules/@stdlib/string/code-point-at/lib/main.js b/lib/node_modules/@stdlib/string/code-point-at/lib/main.js
new file mode 100644
index 000000000000..3b0fad8885b3
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/code-point-at/lib/main.js
@@ -0,0 +1,130 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2020 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var isBoolean = require( '@stdlib/assert/is-boolean' ).isPrimitive;
+var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
+var isNonNegativeInteger = require( '@stdlib/assert/is-nonnegative-integer' ).isPrimitive;
+
+
+// VARIABLES //
+
+// Factors for converting individual surrogates
+var Ox10000 = 0x10000|0; // 65536
+var Ox400 = 0x400|0; // 1024
+
+// Range for a high surrogate
+var OxD800 = 0xD800|0; // 55296
+var OxDBFF = 0xDBFF|0; // 56319
+
+// Range for a low surrogate
+var OxDC00 = 0xDC00|0; // 56320
+var OxDFFF = 0xDFFF|0; // 57343
+
+
+// MAIN //
+
+/**
+* Returns a Unicode code point from a string at a specified position.
+*
+* ## Notes
+*
+* - UTF-16 encoding uses one 16-bit unit for non-surrogates (U+0000 to U+D7FF and U+E000 to U+FFFF).
+* - UTF-16 encoding uses two 16-bit units (surrogate pairs) for U+10000 to U+10FFFF and encodes U+10000-U+10FFFF by subtracting 0x10000 from the code point, expressing the result as a 20-bit binary, and splitting the 20 bits of 0x0-0xFFFFF as upper and lower 10-bits. The respective 10-bits are stored in two 16-bit words: a high and a low surrogate.
+*
+*
+* @param {string} str - input string
+* @param {NonNegativeInteger} idx - position
+* @param {boolean} [backward=false] - backward iteration for low surrogates
+* @throws {TypeError} first argument must be a string primitive
+* @throws {TypeError} second argument must be a number primitive having a nonnegative integer
+* @throws {TypeError} third argument must be a boolean primitive
+* @throws {RangeError} position must be a valid index in string
+* @returns {NonNegativeInteger} code point
+*
+* @example
+* var out = codePointAt( 'last man standing', 4 );
+* // returns 32
+*
+* @example
+* var out = codePointAt( 'presidential election', 8, true );
+* // returns 116
+*
+* @example
+* var out = codePointAt( 'अनुच्छेद', 2 );
+* // returns 2369
+*
+* @example
+* var out = codePointAt( '🌷', 1, true );
+* // returns 127799
+*/
+function codePointAt( str, idx, backward ) {
+ var code;
+ var FLG;
+ var low;
+ var hi;
+
+ if ( !isString( str ) ) {
+ throw new TypeError( 'invalid argument. Must provide a string. Value: `' + str + '`.' );
+ }
+ if ( !isNonNegativeInteger( idx ) ) {
+ throw new TypeError( 'invalid argument. Must provide a valid position (nonnegative integer). Value: `' + idx + '`.' );
+ }
+ if ( idx >= str.length ) {
+ throw new RangeError( 'invalid argument. Must provide a valid position (within string bounds). Value: `' + idx + '`.' );
+ }
+ if ( arguments.length > 2 ) {
+ if ( !isBoolean( backward ) ) {
+ throw new TypeError( 'invalid argument. Third argument must be a boolean. Value: `' + backward + '`.' );
+ }
+ FLG = backward;
+ } else {
+ FLG = false;
+ }
+ code = str.charCodeAt( idx );
+
+ // High surrogate
+ if ( code >= OxD800 && code <= OxDBFF && idx < str.length - 1 ) {
+ hi = code;
+ low = str.charCodeAt( idx+1 );
+ if ( OxDC00 <= low && low <= OxDFFF ) {
+ return ( ( hi - OxD800 ) * Ox400 ) + ( low - OxDC00 ) + Ox10000;
+ }
+ return hi;
+ }
+ // Low surrogate - support only if backward iteration is desired
+ if ( FLG ) {
+ if ( code >= OxDC00 && code <= OxDFFF && idx >= 1 ) {
+ hi = str.charCodeAt( idx-1 );
+ low = code;
+ if ( OxD800 <= hi && hi <= OxDBFF ) {
+ return ( ( hi - OxD800 ) * Ox400 ) + ( low - OxDC00 ) + Ox10000;
+ }
+ return low;
+ }
+ }
+ return code;
+}
+
+
+// EXPORTS //
+
+module.exports = codePointAt;
diff --git a/lib/node_modules/@stdlib/string/code-point-at/package.json b/lib/node_modules/@stdlib/string/code-point-at/package.json
new file mode 100644
index 000000000000..66ff3b06e661
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/code-point-at/package.json
@@ -0,0 +1,73 @@
+{
+ "name": "@stdlib/string/code-point-at",
+ "version": "0.0.0",
+ "description": "Return a Unicode code point from a string at a specified position.",
+ "license": "Apache-2.0",
+ "author": {
+ "name": "The Stdlib Authors",
+ "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+ },
+ "contributors": [
+ {
+ "name": "The Stdlib Authors",
+ "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+ }
+ ],
+ "bin": {
+ "from-code-point": "./bin/cli"
+ },
+ "main": "./lib",
+ "directories": {
+ "benchmark": "./benchmark",
+ "bin": "./bin",
+ "doc": "./docs",
+ "example": "./examples",
+ "lib": "./lib",
+ "test": "./test"
+ },
+ "types": "./docs/types",
+ "scripts": {},
+ "homepage": "https://github.com/stdlib-js/stdlib",
+ "repository": {
+ "type": "git",
+ "url": "git://github.com/stdlib-js/stdlib.git"
+ },
+ "bugs": {
+ "url": "https://github.com/stdlib-js/stdlib/issues"
+ },
+ "dependencies": {},
+ "devDependencies": {},
+ "engines": {
+ "node": ">=0.10.0",
+ "npm": ">2.7.0"
+ },
+ "os": [
+ "aix",
+ "darwin",
+ "freebsd",
+ "linux",
+ "macos",
+ "openbsd",
+ "sunos",
+ "win32",
+ "windows"
+ ],
+ "keywords": [
+ "stdlib",
+ "stdstring",
+ "string",
+ "str",
+ "utilities",
+ "utility",
+ "utils",
+ "util",
+ "code",
+ "point",
+ "pt",
+ "unicode",
+ "utf-16",
+ "utf16",
+ "surrogate",
+ "astral"
+ ]
+}
diff --git a/lib/node_modules/@stdlib/string/code-point-at/test/fixtures/stdin_error.js.txt b/lib/node_modules/@stdlib/string/code-point-at/test/fixtures/stdin_error.js.txt
new file mode 100644
index 000000000000..030cd465f279
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/code-point-at/test/fixtures/stdin_error.js.txt
@@ -0,0 +1,32 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2020 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+var resolve = require( 'path' ).resolve;
+var proxyquire = require( 'proxyquire' );
+
+var fpath = resolve( __dirname, '..', 'bin', 'cli' );
+
+process.stdin.isTTY = false;
+
+proxyquire( fpath, {
+ '@stdlib/process/read-stdin': stdin
+});
+
+function stdin( clbk ) {
+ clbk( new Error( 'beep' ) );
+}
diff --git a/lib/node_modules/@stdlib/string/code-point-at/test/test.cli.js b/lib/node_modules/@stdlib/string/code-point-at/test/test.cli.js
new file mode 100644
index 000000000000..367dd912ed52
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/code-point-at/test/test.cli.js
@@ -0,0 +1,259 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2020 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var resolve = require( 'path' ).resolve;
+var exec = require( 'child_process' ).exec;
+var tape = require( 'tape' );
+var IS_BROWSER = require( '@stdlib/assert/is-browser' );
+var IS_WINDOWS = require( '@stdlib/assert/is-windows' );
+var replace = require( '@stdlib/string/replace' );
+var readFileSync = require( '@stdlib/fs/read-file' ).sync;
+
+
+// VARIABLES //
+
+var fpath = resolve( __dirname, '..', 'bin', 'cli' );
+var opts = {
+ 'skip': IS_BROWSER || IS_WINDOWS
+};
+
+
+// FIXTURES //
+
+var PKG_VERSION = require( './../package.json' ).version;
+
+
+// TESTS //
+
+tape( 'command-line interface', function test( t ) {
+ t.ok( true, __filename );
+ t.end();
+});
+
+tape( 'when invoked with a `--help` flag, the command-line interface prints the help text to `stderr`', opts, function test( t ) {
+ var expected;
+ var cmd;
+
+ expected = readFileSync( resolve( __dirname, '..', 'docs', 'usage.txt' ), {
+ 'encoding': 'utf8'
+ });
+ cmd = [
+ process.execPath,
+ fpath,
+ '--help'
+ ];
+
+ exec( cmd.join( ' ' ), done );
+
+ function done( error, stdout, stderr ) {
+ if ( error ) {
+ t.fail( error.message );
+ } else {
+ t.strictEqual( stdout.toString(), '', 'does not print to `stdout`' );
+ t.strictEqual( stderr.toString(), expected+'\n', 'expected value' );
+ }
+ t.end();
+ }
+});
+
+tape( 'when invoked with a `-h` flag, the command-line interface prints the help text to `stderr`', opts, function test( t ) {
+ var expected;
+ var cmd;
+
+ expected = readFileSync( resolve( __dirname, '..', 'docs', 'usage.txt' ), {
+ 'encoding': 'utf8'
+ });
+ cmd = [
+ process.execPath,
+ fpath,
+ '-h'
+ ];
+
+ exec( cmd.join( ' ' ), done );
+
+ function done( error, stdout, stderr ) {
+ if ( error ) {
+ t.fail( error.message );
+ } else {
+ t.strictEqual( stdout.toString(), '', 'does not print to `stdout`' );
+ t.strictEqual( stderr.toString(), expected+'\n', 'expected value' );
+ }
+ t.end();
+ }
+});
+
+tape( 'when invoked with a `--version` flag, the command-line interface prints the version to `stderr`', opts, function test( t ) {
+ var cmd = [
+ process.execPath,
+ fpath,
+ '--version'
+ ];
+
+ exec( cmd.join( ' ' ), done );
+
+ function done( error, stdout, stderr ) {
+ if ( error ) {
+ t.fail( error.message );
+ } else {
+ t.strictEqual( stdout.toString(), '', 'does not print to `stdout`' );
+ t.strictEqual( stderr.toString(), PKG_VERSION+'\n', 'expected value' );
+ }
+ t.end();
+ }
+});
+
+tape( 'when invoked with a `-V` flag, the command-line interface prints the version to `stderr`', opts, function test( t ) {
+ var cmd = [
+ process.execPath,
+ fpath,
+ '-V'
+ ];
+
+ exec( cmd.join( ' ' ), done );
+
+ function done( error, stdout, stderr ) {
+ if ( error ) {
+ t.fail( error.message );
+ } else {
+ t.strictEqual( stdout.toString(), '', 'does not print to `stdout`' );
+ t.strictEqual( stderr.toString(), PKG_VERSION+'\n', 'expected value' );
+ }
+ t.end();
+ }
+});
+
+tape( 'the command-line interface returns code point at a specified string position', opts, function test( t ) {
+ var cmd = [
+ process.execPath,
+ '-e',
+ '"process.stdin.isTTY = true; process.argv[ 2 ] = \'--pos=4\'; process.argv[ 3 ] = \'last man standing\'; require( \''+fpath+'\' );"'
+ ];
+
+ exec( cmd.join( ' ' ), done );
+
+ function done( error, stdout, stderr ) {
+ if ( error ) {
+ t.fail( error.message );
+ } else {
+ t.strictEqual( stdout.toString(), '32\n', 'expected value' );
+ t.strictEqual( stderr.toString(), '', 'does not print to `stderr`' );
+ }
+ t.end();
+ }
+});
+
+tape( 'the command-line interface supports backward iteration for low surrogates when invoked with `--backward` flag', opts, function test( t ) {
+ var cmd = [
+ process.execPath,
+ '-e',
+ '"process.stdin.isTTY = true; process.argv[ 2 ] = \'--pos=1\'; process.argv[ 3 ] = \'--backward\'; process.argv[ 4 ] = \'🌷\'; require( \''+fpath+'\' );"'
+ ];
+
+ exec( cmd.join( ' ' ), done );
+
+ function done( error, stdout, stderr ) {
+ if ( error ) {
+ t.fail( error.message );
+ } else {
+ t.strictEqual( stdout.toString(), '127799\n', 'expected value' );
+ t.strictEqual( stderr.toString(), '', 'does not print to `stderr`' );
+ }
+ t.end();
+ }
+});
+
+tape( 'the command-line interface supports backward iteration for low surrogates when invoked with `-b` flag', opts, function test( t ) {
+ var cmd = [
+ process.execPath,
+ '-e',
+ '"process.stdin.isTTY = true; process.argv[ 2 ] = \'--pos=1\'; process.argv[ 3 ] = \'--backward\'; process.argv[ 4 ] = \'🌷\'; require( \''+fpath+'\' );"'
+ ];
+
+ exec( cmd.join( ' ' ), done );
+
+ function done( error, stdout, stderr ) {
+ if ( error ) {
+ t.fail( error.message );
+ } else {
+ t.strictEqual( stdout.toString(), '127799\n', 'expected value' );
+ t.strictEqual( stderr.toString(), '', 'does not print to `stderr`' );
+ }
+ t.end();
+ }
+});
+
+tape( 'the command-line interface supports use as a standard stream', opts, function test( t ) {
+ var cmd = [
+ 'printf \'अनुच्छेद\'',
+ '|',
+ process.execPath,
+ fpath,
+ '--pos=2'
+ ];
+
+ exec( cmd.join( ' ' ), done );
+
+ function done( error, stdout, stderr ) {
+ if ( error ) {
+ t.fail( error.message );
+ } else {
+ t.strictEqual( stdout.toString(), '2369\n', 'expected value' );
+ t.strictEqual( stderr.toString(), '', 'does not print to `stderr`' );
+ }
+ t.end();
+ }
+});
+
+tape( 'when used as a standard stream, if an error is encountered when reading from `stdin`, the command-line interface prints an error and sets a non-zero exit code', opts, function test( t ) {
+ var script;
+ var opts;
+ var cmd;
+
+ script = readFileSync( resolve( __dirname, 'fixtures', 'stdin_error.js.txt' ), {
+ 'encoding': 'utf8'
+ });
+
+ // Replace single quotes with double quotes:
+ script = replace( script, '\'', '"' );
+
+ cmd = [
+ process.execPath,
+ '-e',
+ '\''+script+'\''
+ ];
+
+ opts = {
+ 'cwd': __dirname
+ };
+
+ exec( cmd.join( ' ' ), opts, done );
+
+ function done( error, stdout, stderr ) {
+ if ( error ) {
+ t.pass( error.message );
+ t.strictEqual( error.code, 1, 'expected exit code' );
+ }
+ t.strictEqual( stdout.toString(), '', 'does not print to `stdout`' );
+ t.strictEqual( stderr.toString(), 'Error: beep\n', 'expected value' );
+ t.end();
+ }
+});
diff --git a/lib/node_modules/@stdlib/string/code-point-at/test/test.js b/lib/node_modules/@stdlib/string/code-point-at/test/test.js
new file mode 100644
index 000000000000..979b719f7016
--- /dev/null
+++ b/lib/node_modules/@stdlib/string/code-point-at/test/test.js
@@ -0,0 +1,166 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2020 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var codePointAt = require( './../lib' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof codePointAt, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'the function throws an error if the first argument is not a string primitive', function test( t ) {
+ var values;
+ var i;
+
+ values = [
+ -5,
+ 3.14,
+ -1.0,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [ 'beep', 'boop' ],
+ [ 1, 2, 3 ],
+ {},
+ function noop() {}
+ ];
+
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[i] ), TypeError, 'throws an error when provided '+values[i] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ codePointAt( value, 0 );
+ };
+ }
+});
+
+tape( 'the function throws an error if the second argument is not a nonnegative integer', function test( t ) {
+ var values;
+ var i;
+
+ values = [
+ 'bar',
+ -5,
+ 3.14,
+ -1.0,
+ NaN,
+ null,
+ void 0,
+ [ 'beep', 'boop' ],
+ [ 1, 2, 3 ],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[i] ), TypeError, 'throws an error when provided '+values[i] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ codePointAt( 'foo', value );
+ };
+ }
+});
+
+tape( 'the function throws an error if the third argument is not a boolean primitive', function test( t ) {
+ var values;
+ var i;
+
+ values = [
+ 'bar',
+ -5,
+ 3.14,
+ -1.0,
+ NaN,
+ null,
+ void 0,
+ [ 'beep', 'boop' ],
+ [ 1, 2, 3 ],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[i] ), TypeError, 'throws an error when provided '+values[i] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ codePointAt( 'foo', 0, value );
+ };
+ }
+});
+
+tape( 'the function throws an error if a provided position is not a valid index in the provided string', function test( t ) {
+ var values;
+ var i;
+
+ values = [
+ [ 'bar', 3 ],
+ [ 'string', 7 ],
+ [ '', 0 ]
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[i] ), RangeError, 'throws an error when provided '+values[i] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ codePointAt( value[ 0 ], value[ 1 ] );
+ };
+ }
+});
+
+tape( 'the arity of the function is 3', function test( t ) {
+ t.strictEqual( codePointAt.length, 3, 'has length 3' );
+ t.end();
+});
+
+tape( 'the function returns the code point at a specified string position', function test( t ) {
+ var out;
+
+ out = codePointAt( 'last man standing', 4 );
+ t.strictEqual( out, 0x20, 'returns expected value' );
+
+ out = codePointAt( 'presidential election', 8, true );
+ t.strictEqual( out, 0x74, 'returns expected value' );
+
+ out = codePointAt( 'अनुच्छेद', 2 );
+ t.strictEqual( out, 0x941, 'returns expected value' );
+
+ out = codePointAt( '🌷', 0, true );
+ t.strictEqual( out, 0x1F337, 'returns expected value' );
+
+ t.end();
+});
diff --git a/lib/node_modules/@stdlib/string/num-grapheme-clusters/lib/code_point_at.js b/lib/node_modules/@stdlib/string/num-grapheme-clusters/lib/code_point_at.js
deleted file mode 100644
index c8728b9eb3bf..000000000000
--- a/lib/node_modules/@stdlib/string/num-grapheme-clusters/lib/code_point_at.js
+++ /dev/null
@@ -1,78 +0,0 @@
-/**
-* @license Apache-2.0
-*
-* Copyright (c) 2020 The Stdlib Authors.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-* http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
-
-'use strict';
-
-// MAIN //
-
-/**
-* Returns the Unicode code point of the character located at a specified position.
-*
-* @private
-* @param {string} str - input string
-* @param {NonNegativeInteger} idx - position
-* @returns {NonNegativeInteger} code point
-*
-* @example
-* var out = codePointAt( 'last man standing', 4 );
-* // returns 32
-*
-* @example
-* var out = codePointAt( 'presidential election', 8 );
-* // returns 116
-*
-* @example
-* var out = codePointAt( 'अनुच्छेद', 2 );
-* // returns 2369
-*
-* @example
-* var out = codePointAt( '🌷', 0 );
-* // returns 127799
-*/
-function codePointAt( str, idx ) {
- var code;
- var low;
- var hi;
-
- code = str.charCodeAt( idx );
-
- // High surrogate
- if ( code >= 0xD800 && code <= 0xDBFF && idx < str.length - 1 ) {
- hi = code;
- low = str.charCodeAt( idx+1 );
- if ( 0xDC00 <= low && low <= 0xDFFF ) {
- return ( ( hi - 0xD800 ) * 0x400 ) + ( low - 0xDC00 ) + 0x10000;
- }
- return hi;
- }
- // Low surrogate
- if ( code >= 0xDC00 && code <= 0xDFFF && idx >= 1 ) {
- hi = str.charCodeAt( idx-1 );
- low = code;
- if ( 0xD800 <= hi && hi <= 0xDBFF ) {
- return ( ( hi - 0xD800 ) * 0x400 ) + ( low - 0xDC00 ) + 0x10000;
- }
- return low;
- }
- return code;
-}
-
-
-// EXPORTS //
-
-module.exports = codePointAt;
diff --git a/lib/node_modules/@stdlib/string/num-grapheme-clusters/lib/next_break.js b/lib/node_modules/@stdlib/string/num-grapheme-clusters/lib/next_break.js
index d177668a150c..e4949b61c18a 100644
--- a/lib/node_modules/@stdlib/string/num-grapheme-clusters/lib/next_break.js
+++ b/lib/node_modules/@stdlib/string/num-grapheme-clusters/lib/next_break.js
@@ -20,7 +20,7 @@
// MODULES //
-var codePointAt = require( './code_point_at.js' );
+var codePointAt = require( '@stdlib/string/code-point-at' );
var isSurrogate = require( './is_surrogate.js' );
var shouldBreak = require( './should_break.js' );
var getGraphemeBreakProperty = require( './get_grapheme_break_property.js' );
diff --git a/lib/node_modules/@stdlib/string/num-grapheme-clusters/test/test.code_point_at.js b/lib/node_modules/@stdlib/string/num-grapheme-clusters/test/test.code_point_at.js
deleted file mode 100644
index 00232a0008a4..000000000000
--- a/lib/node_modules/@stdlib/string/num-grapheme-clusters/test/test.code_point_at.js
+++ /dev/null
@@ -1,51 +0,0 @@
-/**
-* @license Apache-2.0
-*
-* Copyright (c) 2020 The Stdlib Authors.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-* http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
-
-'use strict';
-
-// MODULES //
-
-var tape = require( 'tape' );
-var codePointAt = require( './../lib/code_point_at.js' );
-
-
-// TESTS //
-
-tape( 'main export is a function', function test( t ) {
- t.ok( true, __filename );
- t.strictEqual( typeof codePointAt, 'function', 'main export is a function' );
- t.end();
-});
-
-tape( 'the function returns the code point at a specified string position', function test( t ) {
- var out;
-
- out = codePointAt( 'last man standing', 4 );
- t.strictEqual( out, 0x20, 'returns expected value' );
-
- out = codePointAt( 'presidential election', 8 );
- t.strictEqual( out, 0x74, 'returns expected value' );
-
- out = codePointAt( 'अनुच्छेद', 2 );
- t.strictEqual( out, 0x941, 'returns expected value' );
-
- out = codePointAt( '🌷', 0 );
- t.strictEqual( out, 0x1F337, 'returns expected value' );
-
- t.end();
-});