orc.ast.simple.type
Class PolymorphicTypeAlias

java.lang.Object
  orc.ast.simple.type.Type
      orc.ast.simple.type.PolymorphicTypeAlias

public class PolymorphicTypeAlias
extends Type

A representation of an aliased type with type parameters.

Author:

dkitchin

Field Summary

java.util.List<TypeVariable>	formals
Type	type

Fields inherited from class orc.ast.simple.type.Type

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Constructor Summary

PolymorphicTypeAlias(Type type, java.util.List<TypeVariable> formals)

Method Summary

Type	convert(Env<TypeVariable> env) Convert this syntactic type into an actual type, given an appropriate type context
Type	subst(Type T, FreeTypeVariable X) Performs the substitution [T/X], replacing occurrences of the free type variable X with the type T (which could be any type, including another variable).

Methods inherited from class orc.ast.simple.type.Type

convertAll, subMap, substAll, substMaybe, subvar

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

type

public Type type

formals

public java.util.List<TypeVariable> formals

Constructor Detail

PolymorphicTypeAlias

public PolymorphicTypeAlias(Type type,
                            java.util.List<TypeVariable> formals)

Method Detail

convert

public Type convert(Env<TypeVariable> env)
             throws TypeException

Description copied from class: Type

Convert this syntactic type into an actual type, given an appropriate type context

Specified by:

convert in class Type

Parameters:

env - The type environment, used in content addressable mode to find the appropriate deBruijn index of a type variable.

Returns:

A new node.

Throws:

TypeException

subst

public Type subst(Type T,
                  FreeTypeVariable X)

Description copied from class: Type

Performs the substitution [T/X], replacing occurrences of the free type variable X with the type T (which could be any type, including another variable).

Specified by:

subst in class Type

Parameters:

T - The replacing type

X - The free type variable whose occurrences will be replaced

Returns:

A new copy of the type with the substitution performed