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10.3.5 extern data

Apart from bool, enum, and int types introduced above, also extern data types can be defined. An extern data type is defined as follows:

extern          ::= "extern" identifier data-expression ";"
data-expression ::= "$" (!"$")* "$" | data-variable
data-variable   ::= identifier | port "." identifier

The data-expression is a type expression in the target language.

No Dezyne-supported expressions are available for data types, apart from data-expressions. The content of the data-expression is passed to the target language verbatim.

For example, a C++ string type could be defined as follows:

extern string $std::string$;