fmrisc.Syntax
Class LetExpression

java.lang.Object
  fmrisc.Syntax.ASTBase
      fmrisc.Syntax.ExpressionBase
          fmrisc.Syntax.LetExpression

All Implemented Interfaces:

AST, Expression

public final class LetExpression
extends ExpressionBase

Handling of terms with local bindings.

Constructor Summary

LetExpression(ValueDeclaration[] declarations, Expression base)
construct let expressions of declarations and base expressions

Method Summary

AST	accept(ASTVisitor visitor) Accept visitor for a visit.
Expression	getBase() get base expression
ValueDeclaration[]	getDeclarations() get declarations
int	getPriority() get binding level for printing (lower numbers mean greater binding power)
Expression	instantiate() return copy of AST with value references instantiated by the substitutions set in the corresponding declaration identifiers
void	printCore(java.io.PrintWriter out) Prints text representation of tree on out (without new line termination).

Methods inherited from class fmrisc.Syntax.ExpressionBase

printPriority

Methods inherited from class fmrisc.Syntax.ASTBase

print, printParens, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface fmrisc.Syntax.AST

print, printParens, toString

Constructor Detail

LetExpression

public LetExpression(ValueDeclaration[] declarations,
                     Expression base)

construct let expressions of declarations and base expressions

Parameters:

declarations - the local bindings in the expressions

base - the base expressions

Method Detail

getPriority

public int getPriority()

get binding level for printing (lower numbers mean greater binding power)

Specified by:

getPriority in interface Expression

Specified by:

getPriority in class ExpressionBase

Returns:

the priority level

getDeclarations

public ValueDeclaration[] getDeclarations()

get declarations

Returns:

the declaration sequence

getBase

public Expression getBase()

get base expression

Returns:

the base expression

instantiate

public Expression instantiate()

return copy of AST with value references instantiated by the substitutions set in the corresponding declaration identifiers

Returns:

the instantiated copy

printCore

public void printCore(java.io.PrintWriter out)

Prints text representation of tree on out (without new line termination).

Specified by:

printCore in interface AST

Specified by:

printCore in class ASTBase

Parameters:

out - the stream on which the text is written

accept

public AST accept(ASTVisitor visitor)

Accept visitor for a visit.

Parameters:

visitor - the visitor who is accepted by this node.

Returns:

the result of the visit (may be null)