orc.ast.oil
Class TypeDecl

java.lang.Object
  orc.ast.oil.Expr
      orc.ast.oil.TypeDecl

public class TypeDecl
extends Expr

Bind a type in the given scope.

Author:

dkitchin

Field Summary

Expr	body
Type	type

Constructor Summary

TypeDecl(Type type, Expr body)

Method Summary

<E> E	accept(Visitor<E> visitor)
void	addIndices(java.util.Set<java.lang.Integer> indices, int depth) If this expression has any indices which are >= depth, add (index - depth) to the index set accumulator.
Node	compile(Node output) Compiles an oil syntax tree into an execution graph.
void	typecheck(Type T, Env<Type> ctx, Env<Type> typectx)
Type	typesynth(Env<Type> ctx, Env<Type> typectx)

Methods inherited from class orc.ast.oil.Expr

freeVars

Methods inherited from class java.lang.Object

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

Field Detail

type

public Type type

body

public Expr body

Constructor Detail

TypeDecl

public TypeDecl(Type type,
                Expr body)

Method Detail

accept

public <E> E accept(Visitor<E> visitor)

Specified by:

accept in class Expr

addIndices

public void addIndices(java.util.Set<java.lang.Integer> indices,
                       int depth)

Description copied from class: Expr

If this expression has any indices which are >= depth, add (index - depth) to the index set accumulator. The depth increases each time this method recurses through a binder. The default implementation is to assume the expression has no free variables, and thus do nothing. Expressions which contain variables or subexpressions override this behavior.

Specified by:

addIndices in class Expr

Parameters:

indices - The index set accumulator.

depth - The minimum index for a free variable.

compile

public Node compile(Node output)

Description copied from class: Expr

Compiles an oil syntax tree into an execution graph. Every node is compiled relative to an "output" node that represents the "rest of the program". Thus the tree of compiled nodes is created bottom up.

Specified by:

compile in class Expr

Parameters:

output - This is the node to which output (publications) will be directed.

Returns:

A new node.

typesynth

public Type typesynth(Env<Type> ctx,
                      Env<Type> typectx)
               throws TypeException

Specified by:

typesynth in class Expr

Throws:

TypeException

typecheck

public void typecheck(Type T,
                      Env<Type> ctx,
                      Env<Type> typectx)
               throws TypeException

Overrides:

typecheck in class Expr

Throws:

TypeException