edu.jmu.decaf

Class Symbol

java.lang.Object

edu.jmu.decaf.Symbol

public class Symbol
extends Object

Single Decaf symbol. Might represent a scalar variable, an array, or a formal function parameter.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Symbol.MemLoc Memory access locations.

Field Summary

Fields

Modifier and Type	Field and Description
int	elementSize Size of individual elements (in bytes)
boolean	isArray Flag indicating this symbol represents an array
int	length Length of array (for array symbols; should be 1 for others)
Symbol.MemLoc	location Memory location information
String	name Name in source code
int	offset Memory offset (if needed)
List<ASTNode.DataType>	paramTypes Data types of formal parameters (for function symbols, empty for others)
int	totalSize Size of overall structure (in bytes); for scalar variables, elementSize == totalSize
ASTNode.DataType	type Data type
static int	WORD_SIZE Word size (used for some data types and addresses)

Constructor Summary

Constructors

Constructor and Description
Symbol(String name, ASTNode.DataType type) Create a new scalar symbol
Symbol(String name, ASTNode.DataType type, boolean isArray, int length) Create a new array symbol
Symbol(String name, ASTNode.DataType returnType, List<ASTNode.DataType> paramTypes) Create a new function symbol

Method Summary

Modifier and Type	Method and Description
String	toString() Simplified string representation

Methods inherited from class java.lang.Object

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

Field Detail

WORD_SIZE

public static final int WORD_SIZE

Word size (used for some data types and addresses)

See Also:

Constant Field Values

name

public String name

Name in source code

type

public ASTNode.DataType type

Data type

paramTypes

public List<ASTNode.DataType> paramTypes

Data types of formal parameters (for function symbols, empty for others)

isArray

public boolean isArray

Flag indicating this symbol represents an array

length

public int length

Length of array (for array symbols; should be 1 for others)

elementSize

public int elementSize

Size of individual elements (in bytes)

totalSize

public int totalSize

Size of overall structure (in bytes); for scalar variables, elementSize == totalSize

location

public Symbol.MemLoc location

Memory location information

offset

public int offset

Memory offset (if needed)

Constructor Detail

Symbol

public Symbol(String name,
              ASTNode.DataType type)

Create a new scalar symbol

Parameters:

name - Name in source code

type - Data type (ASTNode.DataType)

Symbol

public Symbol(String name,
              ASTNode.DataType type,
              boolean isArray,
              int length)

Create a new array symbol

Parameters:

name - Name in source code

isArray - Flag indicating whether the symbol represents an array or scalar

type - Data type (ASTNode.DataType)

length - Array length (should be 1 for scalar)

Symbol

public Symbol(String name,
              ASTNode.DataType returnType,
              List<ASTNode.DataType> paramTypes)

Create a new function symbol

Parameters:

name - Name in source code

returnType - Function return type (ASTNode.DataType)

paramTypes - List of formal parameter data types

Method Detail

toString

public String toString()

Simplified string representation

Overrides:

toString in class Object

Returns:

String representation