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better inheritance for t.inherits

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This commit is contained in:
Sebastian McKenzie 2015-07-25 00:40:39 +01:00
parent 9cc0442db9
commit e51949e402
1 changed files with 13 additions and 9 deletions
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22
packages/babel/src/types/index.js
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@ -32,6 +32,10 @@ export const STATEMENT_OR_BLOCK_KEYS = ["consequent", "body", "alternate"];
export const FLATTENABLE_KEYS = ["body", "expressions"];
export const FOR_INIT_KEYS = ["left", "init"];
export const COMMENT_KEYS = ["leadingComments", "trailingComments", "innerComments"];
export const INHERIT_KEYS = {
optional: ["typeAnnotation", "typeParameters", "returnType"],
force: ["_scopeInfo", "_paths", "range", "start", "loc", "end"]
};
export const BOOLEAN_NUMBER_BINARY_OPERATORS = [">", "<", ">=", "<="];
export const COMPARISON_BINARY_OPERATORS = ["==", "===", "!=", "!==", "in", "instanceof"];
@ -328,18 +332,18 @@ export function inheritsComments(child: Object, parent: Object): Object {
export function inherits(child: Object, parent: Object): Object {
if (!child || !parent) return child;
child._scopeInfo = parent._scopeInfo;
child._paths = parent._paths;
for (let key of (t.INHERIT_KEYS.optional: Array)) {
if (child[key] == null) {
child[key] = parent[key];
}
}
child.range = parent.range;
child.start = parent.start;
child.loc = parent.loc;
child.end = parent.end;
child.typeAnnotation = parent.typeAnnotation;
child.returnType = parent.returnType;
for (let key of (t.INHERIT_KEYS.force: Array)) {
child[key] = parent[key];
}
t.inheritsComments(child, parent);
return child;
}