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Bug 1250396 (part 1) - Document a subtle contraint on nsIAtom. r=froydnj.

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This commit is contained in:
Nicholas Nethercote 2016-02-17 11:30:02 +11:00
parent fbd198e373
commit 85d2dc6c54
1 changed files with 7 additions and 0 deletions
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7
xpcom/ds/nsIAtom.idl
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@ -53,10 +53,12 @@ interface nsIAtom : nsISupports
}
inline void ToString(nsAString& aBuf) {
// See the comment on |mString|'s declaration.
nsStringBuffer::FromData(mString)->ToString(mLength, aBuf);
}
inline nsStringBuffer* GetStringBuffer() const {
// See the comment on |mString|'s declaration.
return nsStringBuffer::FromData(mString);
}
@ -72,6 +74,11 @@ interface nsIAtom : nsISupports
protected:
uint32_t mLength;
uint32_t mHash;
/**
* WARNING! There is an invisible constraint on |mString|: the chars it
* points to must belong to an nsStringBuffer. This is so that the
* nsStringBuffer::FromData() calls above are valid.
*/
char16_t* mString;
%}
};