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ExternalTypeSignature

ExternalTypeSignature

ExternalTypeSignature

is an option for EmbedCode that gives rules specifying the mapping to external types in an embedded code.

Details

ExternalTypeSignature->{{"var₁"->"type₁",…},"rettype"} specifies that var_i should be of external type type_i, and that the return type for the whole function should be rettype.
ExternalTypeSignature->{{"type₁","type₂",…},"rettype"} takes the n argument to be of type type_n.
The type_i are native types specified as they are named in the target language.
In many languages, possible external types include: "int", "double", "string".
The types of arguments can often be inferred from other data in APIFunction etc. where they appear. A type of Automatic will use the inferred form.
In languages where types are used, the return type typically has to be set explicitly.
ExternalTypeSignature->"rettype" specifies the return type, and if possible infers all argument types.
In languages with dynamic typing, or without types, types do not usually have to be set.

Examples

Basic Examples (1)

Create a cloud object:

Generate a complete Java file to call the cloud object that can be pasted into a Java project:

The types of arguments can often be deduced automatically. The return type must be specified explicitly:

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