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restrict default instances to instances with at least one type variable argument, only type constructors at the root, and all type variables are used once, fix instance lookup of other instances: search if no instance was found in the instance group

remove old overlapping instance test, change find instance algorithm, first determine if an instance exists that only has type constructors as root types (monomorphic root), if so try to find the instance in this group, otherwise try the other instances (polymorphic root)

fix type synonym expansion error in new code for: add new check for overlapping instances (commit 00e07f57)

change the order of instances with type variables, type variables are assigned increasing numbers based on the position of the first occurence from left to right, currently only used if IF_ALLOW_NON_TERMINATING_AND_OVERLAPPING_INSTANCES is enabled (default not)

Resolve crash on existentially qualified type variables that already appear in...

Closes #50

See merge request clean-compiler-and-rts/compiler!11

Resolve crash on existentially qualified type variables that already appear in the left-hand side of the type

Increase the default heapsize for the itask compiler on windows and linux

See merge request clean-compiler-and-rts/compiler!9

generate bimap functions as a case with for each constructor as result the constructor with bimapped arguments, no generic representation of the algebraic, record or newtype is created, remove the bimap functions for the generic representation constructors, use a seperate type for the GenTypeStruct for bimap (BimapGenTypeStruct)

move types GenTypeStruct and GenericTypeRep from module syntax to module generics1, make type GenericTypeReps extensible and move constructors except NoGenericTypeReps

Add error location for patterns in list comprehensions

See merge request clean-compiler-and-rts/compiler!8

compiler module backendconvert with -fusion in make.linux.sh, remove cDirectory.o, set_return_code_c.o and ipc_c.o arguments in call to clm

using bimap when deriving generic functions

A simple bimap function is generated for a type if each constructor argument or field
	- is the only occurrence of a type variable in this constructor or record or
	- consists only of basic types and type constructor names (does not contain type variables)

For example for tuple and Maybe types.

A more complicated bimap function is generated for a type if each constructor argument or field
	- is a type variable
	- consists only of basic types and type constructor names (no type variables)
	- a function type a->b where either a or b
	  is a type that satisfies these rules and the other type
	  consists only of basic types and type constructor names (no type variables)
	- a type constructor for which a simple bimap function can be generated
	  with one argument of which the type satisfied these rules, and the other arguments
	  consist only of basic types and type constructor names (no type variables)

For example for a record with function types with a single type variable.

fix commit f9eda3c5, add code to handle optimized derive of bimap for constructor arguments that do not contain a type variable