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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Wrong token pasting/concatenation when token contains spaces","articleBody":"Stumbled over this issue when i added a define for the Qt macro Q_D(), see Cppcheck ticket https://trac.cppcheck.net/ticket/8479.\r\nFor this C code:\r\n```\r\n#define CONCAT(tok) tok##suffix\r\n\r\nCONCAT(Test);\r\nCONCAT(const Test);\r\n```\r\ngcc outputs:\r\n```\r\n$ gcc -E token_pasting_with_space.c\r\n# 1 \"token_pasting_with_space.c\"\r\n# 1 \"\u003cbuilt-in\u003e\"\r\n# 1 \"\u003ccommand-line\u003e\"\r\n# 1 \"token_pasting_with_space.c\"\r\n\r\n\r\nTestsuffix;\r\nconst Testsuffix;\r\n```\r\nsimplecpp outputs:\r\n```\r\n$ ./simplecpp token_pasting_with_space.c\r\n\r\n\r\nTestsuffix ;\r\nconstTestsuffix ;\r\n```\r\nThe space between \"const\" and \"Test\" is removed.\r\nNot sure what the standard says about such a case but since Qt and gcc are widely used i guess it should work like Qt expects it and gcc handles it to not break things.","author":{"url":"https://github.com/versat","@type":"Person","name":"versat"},"datePublished":"2018-04-12T07:24:16.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/124/simplecpp/issues/124"}