feat: add plot/base/symbol2shape

lib/node_modules/@stdlib/plot/base/symbol2shape/README.md

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+<!--
+
+@license Apache-2.0
+
+Copyright (c) 2026 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.
+
+-->
+
+# symbol2shape
+
+> Convert a symbol [alias][@stdlib/plot/base/symbol-aliases] or [shorthand][@stdlib/plot/base/symbol-shorthands] to a [Vega symbol mark shape][vega-symbol-shape].
+
+<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
+
+<section class="intro">
+
+</section>
+
+<!-- /.intro -->
+
+<!-- Package usage documentation. -->
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var symbol2shape = require( '@stdlib/plot/base/symbol2shape' );
+```
+
+#### symbol2shape( value )
+
+Converts a symbol [alias][@stdlib/plot/base/symbol-aliases] or [shorthand][@stdlib/plot/base/symbol-shorthands] to a [Vega symbol mark shape][vega-symbol-shape].
+
+```javascript
+var out = symbol2shape( 'o' );
+// returns 'circle'
+
+out = symbol2shape( 'circle' );
+// returns 'circle'
+```
+
+For symbols which do not have a corresponding [Vega symbol mark shape][vega-symbol-shape], the function returns an SVG path string.
+
+```javascript
+var out = symbol2shape( '|' );
+// returns 'M0,-1L0,1'
+```
+
+If unable to resolve a shape, the function returns `null`.
+
+```javascript
+var out = symbol2shape( 'beep' );
+// returns null
+```
+
+</section>
+
+<!-- /.usage -->
+
+<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="notes">
+
+## Notes
+
+-   As stipulated by the [Vega documentation][vega-symbol-shape], returned SVG path strings are defined within a square bounding box having coordinates ranging from `-1` to `1` along both the `x` and `y` dimensions.
+
+</section>
+
+<!-- /.notes -->
+
+<!-- Package usage examples. -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var logEachMap = require( '@stdlib/console/log-each-map' );
+var symbolAliases = require( '@stdlib/plot/base/symbol-aliases' );
+var symbol2shape = require( '@stdlib/plot/base/symbol2shape' );
+
+logEachMap( '%s => %s', symbolAliases(), symbol2shape );
+```
+
+</section>
+
+<!-- /.examples -->
+
+<!-- Section to include cited references. If references are included, add a horizontal rule *before* the section. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="references">
+
+</section>
+
+<!-- /.references -->
+
+<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
+
+<section class="related">
+
+</section>
+
+<!-- /.related -->
+
+<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="links">
+
+[@stdlib/plot/base/symbol-aliases]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/plot/base/symbol-aliases
+
+[@stdlib/plot/base/symbol-shorthands]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/plot/base/symbol-shorthands
+
+[vega-symbol-shape]: https://vega.github.io/vega/docs/marks/symbol/
+
+</section>
+
+<!-- /.links -->

lib/node_modules/@stdlib/plot/base/symbol2shape/benchmark/benchmark.js

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+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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 isString = require( '@stdlib/assert/is-string' ).isPrimitive;
+var pkg = require( './../package.json' ).name;
+var symbol2shape = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+	var values;
+	var out;
+	var i;
+
+	values = [
+		'o',
+		'+',
+		'circle',
+		'triangle-up'
+	];
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		out = symbol2shape( values[ i%values.length ] );
+		if ( typeof out !== 'string' ) {
+			b.fail( 'should return a string' );
+		}
+	}
+	b.toc();
+	if ( !isString( out ) ) {
+		b.fail( 'should return a string' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});

lib/node_modules/@stdlib/plot/base/symbol2shape/docs/repl.txt

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+
+{{alias}}( value )
+    Converts a symbol alias or shorthand to a Vega symbol mark shape.
+
+    If unable to resolve a shape, the function returns `null`.
+
+    Parameters
+    ----------
+    value: string
+        Symbol alias or shorthand.
+
+    Returns
+    -------
+    out: string|null
+        Symbol mark shape.
+
+    Examples
+    --------
+    > var v = {{alias}}( 'o' )
+    'circle'
+    > v = {{alias}}( 'circle' )
+    'circle'
+    > v = {{alias}}( 'beep' )
+    null
+
+    See Also
+    --------
+

lib/node_modules/@stdlib/plot/base/symbol2shape/docs/types/index.d.ts

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+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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: 4.1
+
+/**
+* Converts a symbol alias or shorthand to a Vega symbol mark shape.
+*
+* ## Notes
+*
+* -   For symbols having a corresponding [Vega symbol mark shape][1], the function returns the shape name. Otherwise, the function returns an SVG path string.
+* -   As stipulated by the [Vega documentation][1], returned SVG path strings are defined within a square bounding box having coordinates ranging from `-1` to `1` along both the x and y dimensions.
+* -   If unable to resolve a shape, the function returns `null`.
+*
+* [1]: https://vega.github.io/vega/docs/marks/symbol/
+*
+* @param value - symbol alias or shorthand
+* @returns symbol mark shape
+*
+* @example
+* var v = symbol2shape( 'o' );
+* // returns 'circle'
+*
+* v = symbol2shape( 'circle' );
+* // returns 'circle'
+*
+* v = symbol2shape( 'beep' );
+* // returns null
+*/
+declare function symbol2shape( value: string ): string | null;
+
+
+// EXPORTS //
+
+export = symbol2shape;

lib/node_modules/@stdlib/plot/base/symbol2shape/docs/types/test.ts

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+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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 symbol2shape = require( './index' );
+
+
+// TESTS //
+
+// The function returns a string or null...
+{
+	symbol2shape( 'o' ); // $ExpectType string | null
+}
+
+// The compiler throws an error if the function is not provided a string...
+{
+	symbol2shape( 1 ); // $ExpectError
+	symbol2shape( true ); // $ExpectError
+	symbol2shape( false ); // $ExpectError
+	symbol2shape( null ); // $ExpectError
+	symbol2shape( undefined ); // $ExpectError
+	symbol2shape( [] ); // $ExpectError
+	symbol2shape( {} ); // $ExpectError
+	symbol2shape( ( x: number ): number => x ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided an unsupported number of arguments...
+{
+	symbol2shape(); // $ExpectError
+	symbol2shape( 'o', {} ); // $ExpectError
+}

lib/node_modules/@stdlib/plot/base/symbol2shape/examples/index.js

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+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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 logEachMap = require( '@stdlib/console/log-each-map' );
+var symbolAliases = require( '@stdlib/plot/base/symbol-aliases' );
+var symbol2shape = require( './../lib' );
+
+logEachMap( '%s => %s', symbolAliases(), symbol2shape );

lib/node_modules/@stdlib/plot/base/symbol2shape/lib/index.js

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+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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';
+
+/**
+* Convert a symbol alias or shorthand to a Vega symbol mark shape.
+*
+* @module @stdlib/plot/base/symbol2shape
+*
+* @example
+* var symbol2shape = require( '@stdlib/plot/base/symbol2shape' );
+*
+* var v = symbol2shape( 'o' );
+* // returns 'circle'
+*
+* v = symbol2shape( 'circle' );
+* // returns 'circle'
+*
+* v = symbol2shape( 'beep' );
+* // returns null
+*/
+
+// MODULES //
+
+var main = require( './main.js' );
+
+
+// EXPORTS //
+
+module.exports = main;