control-line:define identifier token-sequence
define identifier( identifier , ... ,identifer) token-sequence
undef identifier
include <filename>
include "filename"
include token-sequence
line constant "filename"
line constant
error token-sequence
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pragma token-sequence
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preprocessor-conditional preprocessor-conditional: if-line text elif-parts else-part
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endif if-line:
if constant-expression
ifdef identifier
ifndef identifier elif-parts: elif-line text elif-parts
elif-line:
elif constant-expression elif-part: else-line text else-line:
else