ast

type BinaryExpr struct {
	Op  Operator
	LHS Expr
	RHS Expr
}

type Boolean struct {
	Val bool
}

type Expr interface {
	ExprWalker
	Eval(data map[string]interface{}) (interface{}, error)
}

type ExprWalker interface {
	Walk(Visitor) Expr
}

type Float struct {
	Val float64
}

type FromClause struct {
	Subselects []*FromSubselect
	Resources  []*FromResource
}

type FromResource struct {
	Alias   string
	Group   string
	Version string
	Kind    string

	Namespace string
}

type FromSubselect struct {
	Alias  string
	Select *SelectStatement
}

type Integer struct {
	Val int
}

type JQ struct {
	Expr     Expr
	Path     string
	PathExpr *PathExpression
}

type JsonPath struct {
	Expr     Expr
	Path     string
	PathExpr *PathExpression
}

type Operator lexer.TokenType

type ParenExpr struct {
	Expr     Expr
	PathExpr *PathExpression
}

type PathExpression struct {
	Fields []string
}

type Reference struct {
	Name     string
	PathExpr *PathExpression
}

type SelectClause struct {
	Expressions []*SelectExpression
}

type SelectExpression struct {
	Alias     string
	Condition Expr
}

type SelectStatement struct {
	SelectClause *SelectClause
	FromClause   *FromClause
	WhereClause  *WhereClause
}

type String struct {
	Val string
}

type Subselect struct {
	Select *SelectStatement

	SelectEval func(map[string]interface{}) (interface{}, error)
}

type Visitor interface {
	Visit(Expr) Visitor
}

type WhereClause struct {
	Condition Expr
}