Primary-Expression:

Literal-Operand
Record-Constant
Identifier-Operand
Register-Operand
Integral-TypeName-Operand
Value-Substitution-Operand
LENGTH Identifier-Operand
LENGTHOF Identifier-Operand
MASK Identifier-Operand
SIZE Element-Selection-Expression
SIZEOF Element-Selection-Expression
WIDTH Identifier-Operand
Parenthesized-Expression
Indirected-Expression
Compound-Initializer