45 lines
1.9 KiB
Plaintext
45 lines
1.9 KiB
Plaintext
"use strict";
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// adapted from https://github.com/eslint/eslint/blob/5bdaae205c3a0089ea338b382df59e21d5b06436/lib/rules/utils/ast-utils.js#L191-L230
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.getStaticStringValue = getStaticStringValue;
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const utils_1 = require("@typescript-eslint/utils");
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const isNullLiteral_1 = require("./isNullLiteral");
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/**
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* Returns the result of the string conversion applied to the evaluated value of the given expression node,
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* if it can be determined statically.
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*
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* This function returns a `string` value for all `Literal` nodes and simple `TemplateLiteral` nodes only.
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* In all other cases, this function returns `null`.
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* @param node Expression node.
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* @returns String value if it can be determined. Otherwise, `null`.
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*/
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function getStaticStringValue(node) {
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switch (node.type) {
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case utils_1.AST_NODE_TYPES.Literal:
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// eslint-disable-next-line eqeqeq -- intentional strict comparison for literal value
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if (node.value === null) {
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if ((0, isNullLiteral_1.isNullLiteral)(node)) {
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return String(node.value); // "null"
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}
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if ('regex' in node) {
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return `/${node.regex.pattern}/${node.regex.flags}`;
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}
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if ('bigint' in node) {
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return node.bigint;
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}
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// Otherwise, this is an unknown literal. The function will return null.
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}
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else {
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return String(node.value);
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}
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break;
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case utils_1.AST_NODE_TYPES.TemplateLiteral:
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if (node.expressions.length === 0 && node.quasis.length === 1) {
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return node.quasis[0].value.cooked;
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}
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break;
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// no default
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}
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return null;
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}
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//# sourceMappingURL=getStaticStringValue.js.map |