gecko/xpcom/analysis/override.js

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2012-05-21 04:12:37 -07:00
/* 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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/**
* NS_OVERRIDE may be marked on class methods which are intended to override
* a method in a base class. If the method is removed or altered in the base
* class, the compiler will force all subclass overrides to be modified.
*/
/**
* Generate all the base classes recursively of class `c`.
*/
function all_bases(c)
{
for each (let b in c.bases) {
yield b.type;
for (let bb in all_bases(b.type))
yield bb;
}
}
function process_decl(d)
{
if (!hasAttribute(d, 'NS_override'))
return;
if (!d.memberOf || !d.isFunction) {
error("%s is marked NS_OVERRIDE but is not a class function.".format(d.name), d.loc);
return;
}
if (d.isStatic) {
error("Marking NS_OVERRIDE on static function %s is meaningless.".format(d.name), d.loc);
return;
}
for (let base in all_bases(d.memberOf)) {
for each (let m in base.members) {
if (m.shortName == d.shortName && signaturesMatch(m, d))
return;
}
}
error("NS_OVERRIDE function %s does not override a base class method with the same name and signature".format(d.name), d.loc);
}