FunctionDeclaration

declares name to be a typed function suitable for use in a compiler environment.

Details

The typed function in FunctionDeclaration is typically of the form Typed[{t₁,t₂,…}t_out]@Function[{x₁,x₂,…},body].
The functions declared by FunctionDeclaration can be used in FunctionCompile.
The functions declared by FunctionDeclaration can be added to compiler environments with CompilerEnvironmentAppendTo.
The name used in FunctionDeclaration can be used in more than one declaration so long as they have different types.
The functions declared in FunctionDeclaration can be used in other function declarations.

The compilation uses the function declaration:

A function declaration can be used more than once:

Add a definition to a compiler environment:

Use the compiler environment in a compilation:

The compilation uses the function declaration:

A function declaration can be used more than once:

A function name can be used in more than one declaration:

Call one version:

Call the other version:

A function declaration can call another declaration:

Call one version:

Call the other version:

Add a definition to the default compiler environment:

Now there is no need to use a CompilerEnvironment option:

The default compiler environment can be restored to its default state:

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