If a digraph sequence occurs inside another token, for example a quoted string, or a character constant, it will not be replaced.
Link: Digraphs and trigraphs - Wikipedia
If a digraph sequence occurs inside another token, for example a quoted string, or a character constant, it will not be replaced.
Link: Digraphs and trigraphs - Wikipedia
Many compilers choose to opt-out on digraphs and trigraphs or impose their own rules on them, like not being able to occur inside a string. They were always kind-of a niche thing, useless to almost everyone.
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