index.mjs.map

{"version":3,"file":"index.mjs","sources":["../lib/main.js"],"sourcesContent":["/**\n* @license Apache-2.0\n*\n* Copyright (c) 2019 The Stdlib Authors.\n*\n* Licensed under the Apache License, Version 2.0 (the \"License\");\n* you may not use this file except in compliance with the License.\n* You may obtain a copy of the License at\n*\n*    http://www.apache.org/licenses/LICENSE-2.0\n*\n* Unless required by applicable law or agreed to in writing, software\n* distributed under the License is distributed on an \"AS IS\" BASIS,\n* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n* See the License for the specific language governing permissions and\n* limitations under the License.\n*/\n\n'use strict';\n\n// MODULES //\n\nimport setReadOnly from '@stdlib/utils-define-nonenumerable-read-only-property';\nimport isFunction from '@stdlib/assert-is-function';\nimport isCollection from '@stdlib/assert-is-collection';\nimport { isPrimitive as isInteger } from '@stdlib/assert-is-integer';\nimport isAccessorArray from '@stdlib/array-base-assert-is-accessor-array';\nimport iteratorSymbol from '@stdlib/symbol-iterator';\nimport accessorGetter from '@stdlib/array-base-accessor-getter';\nimport getter from '@stdlib/array-base-getter';\nimport dtype from '@stdlib/array-dtype';\nimport format from '@stdlib/error-tools-fmtprodmsg';\n\n\n// MAIN //\n\n/**\n* Returns an iterator which iterates from right to left over each element in an array-like object view.\n*\n* @param {Collection} src - input value\n* @param {integer} [begin=0] - starting **view** index (inclusive)\n* @param {integer} [end=src.length] - ending **view** index (non-inclusive)\n* @param {Function} [mapFcn] - function to invoke for each iterated value\n* @param {*} [thisArg] - execution context\n* @throws {TypeError} first argument must be an array-like object\n* @throws {TypeError} second argument must be either an integer (starting index) or a function\n* @throws {TypeError} third argument must be either an integer (ending index) or a function\n* @throws {TypeError} fourth argument must be a function\n* @returns {Iterator} iterator\n*\n* @example\n* var iter = arrayview2iteratorRight( [ 1, 2, 3, 4 ], 1, 3 );\n*\n* var v = iter.next().value;\n* // returns 3\n*\n* v = iter.next().value;\n* // returns 2\n*\n* var bool = iter.next().done;\n* // returns true\n*/\nfunction arrayview2iteratorRight( src ) {\n\tvar thisArg;\n\tvar begin;\n\tvar nargs;\n\tvar iter;\n\tvar FLG;\n\tvar fcn;\n\tvar end;\n\tvar get;\n\tvar dt;\n\tvar i;\n\tif ( !isCollection( src ) ) {\n\t\tthrow new TypeError( format( '01j2O', src ) );\n\t}\n\tnargs = arguments.length;\n\tif ( nargs === 1 ) {\n\t\tbegin = 0;\n\t\tend = src.length;\n\t} else if ( nargs === 2 ) {\n\t\tif ( isFunction( arguments[ 1 ] ) ) {\n\t\t\tbegin = 0;\n\t\t\tfcn = arguments[ 1 ];\n\t\t} else {\n\t\t\tbegin = arguments[ 1 ];\n\t\t}\n\t\tend = src.length;\n\t} else if ( nargs === 3 ) {\n\t\tif ( isFunction( arguments[ 1 ] ) ) {\n\t\t\tbegin = 0;\n\t\t\tend = src.length;\n\t\t\tfcn = arguments[ 1 ];\n\t\t\tthisArg = arguments[ 2 ];\n\t\t} else if ( isFunction( arguments[ 2 ] ) ) {\n\t\t\tbegin = arguments[ 1 ];\n\t\t\tend = src.length;\n\t\t\tfcn = arguments[ 2 ];\n\t\t} else {\n\t\t\tbegin = arguments[ 1 ];\n\t\t\tend = arguments[ 2 ];\n\t\t}\n\t} else { // nargs >= 4\n\t\tbegin = arguments[ 1 ];\n\t\tend = arguments[ 2 ];\n\t\tfcn = arguments[ 3 ];\n\t\tif ( !isFunction( fcn ) ) {\n\t\t\tthrow new TypeError( format( '01j32', fcn ) );\n\t\t}\n\t\tthisArg = arguments[ 4 ];\n\t}\n\tif ( !isInteger( begin ) ) {\n\t\tthrow new TypeError( format( '01jEE', begin ) );\n\t}\n\tif ( !isInteger( end ) ) {\n\t\tthrow new TypeError( format( '01jEF', end ) );\n\t}\n\tif ( end < 0 ) {\n\t\tend = src.length + end;\n\t\tif ( end < 0 ) {\n\t\t\tend = 0;\n\t\t}\n\t} else if ( end > src.length ) {\n\t\tend = src.length;\n\t}\n\tif ( begin < 0 ) {\n\t\tbegin = src.length + begin;\n\t\tif ( begin < 0 ) {\n\t\t\tbegin = 0;\n\t\t}\n\t}\n\ti = end;\n\n\t// Create an iterator protocol-compliant object:\n\titer = {};\n\tif ( fcn ) {\n\t\tsetReadOnly( iter, 'next', next1 );\n\t} else {\n\t\tsetReadOnly( iter, 'next', next2 );\n\t}\n\tsetReadOnly( iter, 'return', finish );\n\n\t// If an environment supports `Symbol.iterator`, make the iterator iterable:\n\tif ( iteratorSymbol ) {\n\t\tsetReadOnly( iter, iteratorSymbol, factory );\n\t}\n\t// Resolve an accessor for retrieving array elements (e.g., to accommodate `Complex64Array`, etc):\n\tdt = dtype( src );\n\tif ( isAccessorArray( src ) ) {\n\t\tget = accessorGetter( dt );\n\t} else {\n\t\tget = getter( dt );\n\t}\n\treturn iter;\n\n\t/**\n\t* Returns an iterator protocol-compliant object containing the next iterated value.\n\t*\n\t* @private\n\t* @returns {Object} iterator protocol-compliant object\n\t*/\n\tfunction next1() {\n\t\ti -= 1;\n\t\tif ( FLG || i < begin ) {\n\t\t\treturn {\n\t\t\t\t'done': true\n\t\t\t};\n\t\t}\n\t\treturn {\n\t\t\t'value': fcn.call( thisArg, get( src, i ), i, end-i-1, src ),\n\t\t\t'done': false\n\t\t};\n\t}\n\n\t/**\n\t* Returns an iterator protocol-compliant object containing the next iterated value.\n\t*\n\t* @private\n\t* @returns {Object} iterator protocol-compliant object\n\t*/\n\tfunction next2() {\n\t\ti -= 1;\n\t\tif ( FLG || i < begin ) {\n\t\t\treturn {\n\t\t\t\t'done': true\n\t\t\t};\n\t\t}\n\t\treturn {\n\t\t\t'value': get( src, i ),\n\t\t\t'done': false\n\t\t};\n\t}\n\n\t/**\n\t* Finishes an iterator.\n\t*\n\t* @private\n\t* @param {*} [value] - 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