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-rw-r--r--clang/include/clang/AST/Expr.h9
1 files changed, 8 insertions, 1 deletions
diff --git a/clang/include/clang/AST/Expr.h b/clang/include/clang/AST/Expr.h
index cfd13b2fbbf..9e19940506e 100644
--- a/clang/include/clang/AST/Expr.h
+++ b/clang/include/clang/AST/Expr.h
@@ -479,11 +479,18 @@ public:
/// or L"bar" (wide strings). The actual string is returned by getStrData()
/// is NOT null-terminated, and the length of the string is determined by
/// calling getByteLength(). The C type for a string is always a
-/// ConstantArrayType.
+/// ConstantArrayType. In C++, the char type is const qualified, in C it is
+/// not.
///
/// Note that strings in C can be formed by concatenation of multiple string
/// literal pptokens in translation phase #6. This keeps track of the locations
/// of each of these pieces.
+///
+/// Strings in C can also be truncated and extended by assigning into arrays,
+/// e.g. with constructs like:
+/// char X[2] = "foobar";
+/// In this case, getByteLength() will return 6, but the string literal will
+/// have type "char[2]".
class StringLiteral : public Expr {
const char *StrData;
unsigned ByteLength;
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