statements

type BlockStmt struct {
	Stmt

	Statements []Stmt
}

type ExpressionStmt struct {
	Stmt

	Expression expressions.Expr
}

type FunctionDeclarationStmt struct {
	Stmt

	Name       tokens.Token
	Parameters []interfaces.FuncArg
	ReturnType interfaces.ValueType
	Body       BlockStmt
}

type IfStmt struct {
	Stmt

	Condition  expressions.Expr
	ThenBranch BlockStmt
	ElseBranch BlockStmt
}

type ReturnStmt struct {
	Stmt

	Expression expressions.Expr
}

type Stmt interface {
	Accept(StmtVisitor) interface{}
	TType() StmtType
}

type StmtType string

type StmtVisitor interface {
	VisitExpression(ExpressionStmt) interface{}
	VisitVariableDeclaration(VariableDeclarationStmt) interface{}
	VisitFunctionDeclaration(FunctionDeclarationStmt) interface{}
	VisitVariableAssignment(VariableAssignmentStmt) interface{}
	VisitBlock(BlockStmt) interface{}
	VisitWhile(WhileStmt) interface{}
	VisitIf(IfStmt) interface{}
	VisitReturn(ReturnStmt) interface{}
}

type VarDef struct {
	Name string
	Type interfaces.ValueType
}

type VariableAssignmentStmt struct {
	Name  tokens.Token
	Value expressions.Expr
}

type VariableDeclarationStmt struct {
	Stmt

	Name        tokens.Token
	Type        interfaces.ValueType
	Initializer expressions.Expr
}

type WhileStmt struct {
	Stmt

	Condition expressions.Expr
	Body      BlockStmt
}