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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
import * as t from "@babel/types";
// Perform ES6's anonymous function name inference for all
// locations where static analysis is possible.
// eslint-disable-next-line complexity
export default function getFunctionName(node, parent) {
if (t.isIdentifier(node.id)) {
return node.id.name;
}
if (
t.isObjectMethod(node, { computed: false }) ||
t.isClassMethod(node, { computed: false }) ||
t.isClassPrivateMethod(node)
) {
const { key } = node;
if (t.isIdentifier(key)) {
return key.name;
}
if (t.isStringLiteral(key)) {
return key.value;
}
if (t.isNumericLiteral(key)) {
return `${key.value}`;
}
if (t.isPrivateName(key)) {
return `#${key.id.name}`;
}
}
if (
t.isObjectProperty(parent, { computed: false, value: node }) ||
// TODO: Babylon 6 doesn't support computed class props. It is included
// here so that it is most flexible. Once Babylon 7 is used, this
// can change to use computed: false like ObjectProperty.
(t.isClassProperty(parent, { value: node }) && !parent.computed) ||
(t.isClassPrivateProperty(parent, { value: node }) && !parent.computed)
) {
const { key } = parent;
if (t.isIdentifier(key)) {
return key.name;
}
if (t.isStringLiteral(key)) {
return key.value;
}
if (t.isNumericLiteral(key)) {
return `${key.value}`;
}
if (t.isPrivateName(key)) {
return `#${key.id.name}`;
}
}
if (t.isAssignmentExpression(parent, { operator: "=", right: node })) {
if (t.isIdentifier(parent.left)) {
return parent.left.name;
}
// This case is not supported in standard ES6 name inference, but it
// is included here since it is still a helpful case during debugging.
if (t.isMemberExpression(parent.left, { computed: false })) {
return parent.left.property.name;
}
}
if (
t.isAssignmentPattern(parent, { right: node }) &&
t.isIdentifier(parent.left)
) {
return parent.left.name;
}
if (
t.isVariableDeclarator(parent, { init: node }) &&
t.isIdentifier(parent.id)
) {
return parent.id.name;
}
if (
t.isExportDefaultDeclaration(parent, { declaration: node }) &&
t.isFunctionDeclaration(node)
) {
return "default";
}
return "anonymous";
}