How to use [strings.mixin]

The reference page of strings.mixin has its arguments, constraints and declaration.

Combines the result of the specified Hyperlambda and concatenates inline into its surrounding string.

strings.mixin:@"2+2 equals {{
math.add
   .:int:2
   .:int:2
return:x:-
}}"

The above will result in the following.

strings.mixin:2+2 equals 4

Notice, any inline Hyperlambda is added by adding two braces around your Hyperlambda, at which point the inline Hyperlambda will be executed, and whatever it returns is “mixed into the surrounding string inline”. This slot can be used similarly to [invoke], allowing you to pass in parameters to it by simply adding nodes as children when invoking it. To understand the last point consider the following code.

strings.mixin:@"2 + val equals {{
math.add
   .:int:2
   get-value:x:@.arguments/*/val
return:x:-
}}"
   val:int:5