Uses of Class
slogo.GrammarElement

Packages that use GrammarElement

Package	Description
slogo.expression
slogo.instruction
slogo.parser	This package is responsible for parsing the language SLogo.

Uses of GrammarElement in slogo.expression

Subclasses of GrammarElement in slogo.expression

Modifier and Type	Class and Description
class	ArithmeticBase The "base" or factor of arithmetic instructions (a number or a variable)
class	Number Represents a number
class	Variable A variable stores a value and can be used in an expression.

Uses of GrammarElement in slogo.instruction

Subclasses of GrammarElement in slogo.instruction

Modifier and Type	Class and Description
class	Addition Represents a + b, the addition of two expressions
class	ArithmeticInstruction The base class of all arithmetic instruction, the evaluate method uses the hook/template method value to return a Double value, the template method returns a double.
class	Assignment An assignment instruction assigns an expression to a variable, updating the global state to reflect the assignment.
class	BinaryExpression The base class of any binary expression, e.g., a + b, a - b, or, in future use, a < b and so on.
class	Division Represents a / b, the division of two expressions
class	Instruction Represents an instruction in the SLogo language
class	Multiplication Represents a x b, the multiplication of two expressions
class	Negation Represents unary minus, e.g., MINUS num OR -expression
class	Print The Print instruction prints an expression.
class	Repeat An AST (abstract syntax tree) for a SLogo REPEAT instruction.
class	StrictInstructionList A list of instructions that doesn't include a function definition.
class	Subtraction Represents a subtraction (e.g., lhs - rhs)
class	UnaryExpression Represents a unary expression

Constructors in slogo.instruction with parameters of type GrammarElement

Constructor and Description
Assignment(Variable v, GrammarElement e) Construct an Assignment instruction from a variable and an expression, e.g., X = expression.
Print(GrammarElement e) Represents a Print expression

Uses of GrammarElement in slogo.parser

Methods in slogo.parser that return GrammarElement

Modifier and Type	Method and Description
GrammarElement	StrictInstructionListParser.parse(SLogoInterpreter interpreter) Parses the instructions list
GrammarElement	RepeatParser.parse(SLogoInterpreter interpreter) Parses a REPEAT instruction
GrammarElement	PrintParser.parse(SLogoInterpreter interpreter) parses a print instruction
GrammarElement	Parser.parse(SLogoInterpreter parser)
GrammarElement	InstructionParser.parse(SLogoInterpreter slogoInterpreter) gets the appropriate parser to parse the token
GrammarElement	IdentifierParser.parse(SLogoInterpreter interpreter) parses an assignment statement, which looks like id = expression
GrammarElement	AssignmentParser.parse(SLogoInterpreter interpreter) parses an assignment statement, which looks like id = expression