ScalaMacros

This macro finds all free variables which are bound from an outside scopein a given function parameter.

Usage

sbt/sbt compile to compile

sbt/sbt mkapp to create executable bin/application.sh

Main method is located in ScalaMacros/core/src/main/scala/application/Main.scala

Samples can be found in Main.scala

Macro is located in ScalaMacros/macros/src/main/scala/FindFreeVars.scala

Link to discussion: https://groups.google.com/d/msg/scala-user/VSAFechtnwk/NDNeNzf9Fi4J

How this macro works

1. Use a compile time macro to fetch information about the AST which can be used at runtime: https://stackoverflow.com/questions/24480926/how-can-i-use-scalas-runtime-reflection-to-inspect-a-passed-anonymous-function/25316506#25316506
2. Internals of the macro:
3. Find all Indents in the passed function.
4. Filter out classes, packages, types, function calls.
5. Filter out variables which are declared inside the passed function.
6. Create an expression which, when evaluated, returns a list of (Name, Value) tuples for each variable.

Detailed comments can be found in source code.