avrora.core.isdl.ast
Class CallExpr

java.lang.Object
  avrora.core.isdl.ast.Expr
      avrora.core.isdl.ast.CallExpr

public class CallExpr

extends Expr

The CallExpr class represents a subroutine call within the IR. Subroutines can be called for side effects and produce results in the IR, allowing factoring of common pieces of code.

Field Summary

java.util.List	args The args fields stores a reference to a list of expressions that are evaluated and passed as arguments to the subroutine.
Token	method The method field stores a string that represents the name of the subroutine being called.

Fields inherited from class avrora.core.isdl.ast.Expr

PREC_A_ADD, PREC_A_AND, PREC_A_MUL, PREC_A_OR, PREC_A_SHIFT, PREC_A_XOR, PREC_L_AND, PREC_L_EQU, PREC_L_OR, PREC_L_REL, PREC_L_XOR, PREC_TERM, PREC_UN

Constructor Summary

CallExpr(Token m, java.util.List a)
The constructor of the CallExpr class simply initializes the references to the subroutine name and arguments.

Method Summary

Expr	accept(CodeRebuilder r) The accept() method implements one half of the visitor pattern for rebuilding of expressions.
void	accept(CodeVisitor v) The accept() method implements one half of the visitor pattern so that client visitors can traverse the syntax tree easily and in an extensible way.
void	accept(ExprVisitor v) The accept() method implements one half of the visitor pattern so that client visitors can traverse the syntax tree easily and in an extensible way.
int	getPrecedence() The getPrecedence() method gets the binding precedence for this expression.
java.lang.String	toString() The toString() method recursively converts this expression to a string.

Methods inherited from class avrora.core.isdl.ast.Expr

getBitWidth, innerString, isBitRangeExpr, isConstantExpr, isLiteral, isMap, isVariable, tokenToBool, tokenToInt

Methods inherited from class java.lang.Object

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

Field Detail

method

public final Token method

The method field stores a string that represents the name of the subroutine being called.

args

public final java.util.List args

The args fields stores a reference to a list of expressions that are evaluated and passed as arguments to the subroutine.

Constructor Detail

CallExpr

public CallExpr(Token m,
                java.util.List a)

The constructor of the CallExpr class simply initializes the references to the subroutine name and arguments.

Parameters:

m - the name of the subroutine as a string

a - list of expressions representing the arguments to the subroutine

Method Detail

accept

public void accept(ExprVisitor v)

The accept() method implements one half of the visitor pattern so that client visitors can traverse the syntax tree easily and in an extensible way.

Specified by:

accept in class Expr

Parameters:

v - the visitor to accept

accept

public void accept(CodeVisitor v)

The accept() method implements one half of the visitor pattern so that client visitors can traverse the syntax tree easily and in an extensible way.

Specified by:

accept in class Expr

Parameters:

v - the visitor to accept

accept

public Expr accept(CodeRebuilder r)

The accept() method implements one half of the visitor pattern for rebuilding of expressions. This visitor allows code to be slightly modified while only writing visit methods for the parts of the syntax tree affected.

Specified by:

accept in class Expr

Parameters:

r - the rebuilder to accept

Returns:

the result of calling the appropriate visit() method of the rebuilder

toString

public java.lang.String toString()

The toString() method recursively converts this expression to a string. For binary operations, inner expressions will be nested within parentheses if their precedence is lower than the precedence of the parent expression.

Returns:

a string representation of this expression

getPrecedence

public int getPrecedence()

The getPrecedence() method gets the binding precedence for this expression. This is used to compute when inner expressions must be nested within parentheses in order to preserve the implied order of evaluation.

Specified by:

getPrecedence in class Expr

Returns:

an integer representing the precedence of this expression; higher numbers are higher precedence