orc.ast.simple.expression
Class HasType

java.lang.Object
  orc.ast.simple.expression.Expression
      orc.ast.simple.expression.HasType

public class HasType
extends Expression

An expression with an ascribed syntactic type.

Author:

dkitchin

Field Summary

Expression	body
boolean	checkable
Type	type

Constructor Summary

HasType(Expression body, Type type, boolean checkable)

Method Summary

Expression	convert(Env<Variable> vars, Env<TypeVariable> typevars) Converts abstract syntax tree into a serializable form, used to generate portable .oil (Orc Intermediate Language) files.
Expression	subst(Argument a, FreeVariable x) Performs the substitution [a/x], replacing occurrences of the free variable x with the new argument a (which could be any argument, including another variable).
Expression	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).
java.util.Set<Variable>	vars() Find the set of all Variables (note: not FreeVariables) that are not bound within this expression.

Methods inherited from class orc.ast.simple.expression.Expression

convertAll, subMap, substAll, subvar, subvar

Methods inherited from class java.lang.Object

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

Field Detail

body

public Expression body

type

public Type type

checkable

public boolean checkable

Constructor Detail

HasType

public HasType(Expression body,
               Type type,
               boolean checkable)

Method Detail

convert

public Expression convert(Env<Variable> vars,
                          Env<TypeVariable> typevars)
                   throws CompilationException

Description copied from class: Expression

Converts abstract syntax tree into a serializable form, used to generate portable .oil (Orc Intermediate Language) files.

Specified by:

convert in class Expression

Parameters:

vars - The vars environment, used in content addressable mode to find the appropriate deBruijn index of a var.

typevars - The type vars environment, used in content addressable mode to find the appropriate deBruijn index of a type var.

Returns:

A new node.

Throws:

CompilationException

subst

public Expression subst(Argument a,
                        FreeVariable x)

Description copied from class: Expression

Performs the substitution [a/x], replacing occurrences of the free variable x with the new argument a (which could be any argument, including another variable).

Specified by:

subst in class Expression

Parameters:

a - The replacing variable or value

x - The free variable whose occurrences will be replaced

Returns:

A new copy of the expression with the substitution performed

subst

public Expression subst(Type T,
                        FreeTypeVariable X)

Description copied from class: Expression

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 Expression

Parameters:

T - The replacing type

X - The free type variable whose occurrences will be replaced

Returns:

A new copy of the expression with the substitution performed

vars

public java.util.Set<Variable> vars()

Description copied from class: Expression

Find the set of all Variables (note: not FreeVariables) that are not bound within this expression.

Specified by:

vars in class Expression