Rename compare.rs to comparison.rs to match OPA documentation of builtins.
Also update loop handling to ensure that the current scope is restored after
each iteration of the loop so as to undo side effects of the iteration.
Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>
Support "var = value", "value = var", and "var = var"
Fall back the '=' to comparsion when both operators are defined
Correctly support variable shadowing with "var := value"
Also, remove the unused Variable struct
Signed-off-by: Ming-Wei Shih <mishih@microsoft.com>
Only scalars, composites and comprehensions containing scalars are supported.
This will be changed as OPA fixes bug with default values
Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>
