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author | 2020-11-16 00:10:28 +0100 | |
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committer | 2020-11-16 00:10:28 +0100 | |
commit | e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch) | |
tree | 55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/es-abstract/2019/thisSymbolValue.js | |
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Diffstat (limited to 'node_modules/es-abstract/2019/thisSymbolValue.js')
-rw-r--r-- | node_modules/es-abstract/2019/thisSymbolValue.js | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/node_modules/es-abstract/2019/thisSymbolValue.js b/node_modules/es-abstract/2019/thisSymbolValue.js new file mode 100644 index 0000000..3c3b347 --- /dev/null +++ b/node_modules/es-abstract/2019/thisSymbolValue.js @@ -0,0 +1,19 @@ +'use strict'; + +var callBound = require('../helpers/callBound'); + +var $SymbolValueOf = callBound('Symbol.prototype.valueOf', true); + +var Type = require('./Type'); + +// https://ecma-international.org/ecma-262/9.0/#sec-thissymbolvalue + +module.exports = function thisSymbolValue(value) { + if (!$SymbolValueOf) { + throw new SyntaxError('Symbols are not supported; thisSymbolValue requires that `value` be a Symbol or a Symbol object'); + } + if (Type(value) === 'Symbol') { + return value; + } + return $SymbolValueOf(value); +}; |