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32 lines
848 B
JavaScript
32 lines
848 B
JavaScript
import devAssert from "../jsutils/devAssert.mjs";
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import { GraphQLError } from "../error/GraphQLError.mjs";
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var NAME_RX = /^[_a-zA-Z][_a-zA-Z0-9]*$/;
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/**
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* Upholds the spec rules about naming.
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*/
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export function assertValidName(name) {
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var error = isValidNameError(name);
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if (error) {
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throw error;
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}
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return name;
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}
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/**
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* Returns an Error if a name is invalid.
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*/
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export function isValidNameError(name) {
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typeof name === 'string' || devAssert(0, 'Expected name to be a string.');
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if (name.length > 1 && name[0] === '_' && name[1] === '_') {
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return new GraphQLError("Name \"".concat(name, "\" must not begin with \"__\", which is reserved by GraphQL introspection."));
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}
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if (!NAME_RX.test(name)) {
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return new GraphQLError("Names must match /^[_a-zA-Z][_a-zA-Z0-9]*$/ but \"".concat(name, "\" does not."));
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}
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}
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