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## 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

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