Compiler Error C2017


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The latest version of this topic can be found at Compiler Error C2017.

illegal escape sequence

An escape sequence, such as \t, appears outside of a character or string constant.

The following sample generates C2017:

// C2017.cpp  
int main() {  
   char test1='a'\n;   // C2017  
   char test2='a\n';   // ok  

C2017 can occur when the stringize operator is used with strings that include escape sequences.

The following sample generates C2017:

// C2017b.cpp  
#define TestDfn(x) AfxMessageBox(#x)  
TestDfn(CString("\\") + CString(".h\"\n\n"));   // C2017