parser

type ArgName string

type ArgValue string

type Expr interface {
	// IsName checks if Expression is 'Series Name' expression
	IsName() bool
	// IsFunc checks if Expression is 'Function' expression
	IsFunc() bool
	// IsConst checks if Expression is 'Constant' expression
	IsConst() bool
	// IsString checks if Expression is 'String' expression
	IsString() bool
	// IsBool checks if Expression is 'Bool' expression
	IsBool() bool
	// Type returns type of the expression
	Type() ExprType
	// Target returns target value for expression
	Target() string
	// SetTarget changes target for the expression
	SetTarget(string)
	// MutateTarget changes target for the expression and returns new interface. Please note that it doesn't copy object yet
	MutateTarget(string) Expr
	// ToString returns string representation of expression
	ToString() string

	// FloatValue returns float value for expression.
	FloatValue() float64

	// StringValue returns value of String-typed expression (will return empty string for ConstExpr for example).
	StringValue() string
	// SetValString changes value of String-typed expression
	SetValString(string)
	// MutateValString changes ValString for the expression and returns new interface. Please note that it doesn't copy object yet
	MutateValString(string) Expr

	// Arg returns argument with index (parsed, as Expr interface as well)
	Arg(int) Expr
	// Args returns slice of arguments (parsed, as Expr interface as well)
	Args() []Expr
	// ArgsLen return arguments count
	ArgsLen() int
	// NamedArgs returns map of named arguments. E.x. for nonNegativeDerivative(metric1,maxValue=32) it will return map{"maxValue": constExpr(32)}
	NamedArgs() map[string]Expr
	// NamedArg returns named argument and boolean flag for check arg exist.
	NamedArg(string) (Expr, bool)
	// RawArgs returns string that contains all arguments of expression exactly the same order they appear
	RawArgs() string
	// SetRawArgs changes raw argument list for current expression.
	SetRawArgs(args string)
	// MutateRawArgs changes raw argument list for the expression and returns new interface. Please note that it doesn't copy object yet
	MutateRawArgs(args string) Expr

	// Metrics returns list of metric requests
	Metrics(from, until int64) []MetricRequest

	// GetIntervalArg returns interval typed argument.
	GetIntervalArg(n int, defaultSign int) (int32, error)

	// GetIntervalNamedOrPosArgDefault returns interval typed argument that can be passed as a named argument or as position or replace it with default if none found.
	GetIntervalNamedOrPosArgDefault(k string, n, defaultSign int, v int64) (int64, error)

	// GetStringArg returns n-th argument as string.
	GetStringArg(n int) (string, error)
	// GetStringArgs returns n-th argument as slice of strings.
	GetStringArgs(n int) ([]string, error)
	// GetStringArgDefault returns n-th argument as string. It will replace it with Default value if none present.
	GetStringArgDefault(n int, s string) (string, error)
	// GetStringNamedOrPosArgDefault returns specific positioned string-typed argument or replace it with default if none found.
	GetStringNamedOrPosArgDefault(k string, n int, s string) (string, error)

	// GetFloatArg returns n-th argument as float-typed (if it's convertible to float)
	GetFloatArg(n int) (float64, error)
	// GetFloatArgDefault returns n-th argument as float. It will replace it with Default value if none present.
	GetFloatArgDefault(n int, v float64) (float64, error)
	// GetFloatNamedOrPosArgDefault returns specific positioned float64-typed argument or replace it with default if none found.
	GetFloatNamedOrPosArgDefault(k string, n int, v float64) (float64, error)

	// GetIntArg returns n-th argument as int-typed
	GetIntArg(n int) (int, error)
	// GetIntArgs returns n-th argument as slice of ints
	GetIntArgs(n int) ([]int, error)
	// GetIntArgDefault returns n-th argument as int. It will replace it with Default value if none present.
	GetIntArgDefault(n int, d int) (int, error)
	// GetIntArgWithIndication returns n-th argument as int. If argument wasn't present, second return value will be `false`. Even if there was error in parsing data, but it was there, second value will be `true`
	GetIntArgWithIndication(n int) (int, bool, error)
	// GetIntNamedOrPosArgWithIndication returns specific positioned int-typed argument. If argument wasn't present, second return value will be `false`. Even if there was error in parsing data, but it was there, second value will be `true`
	GetIntNamedOrPosArgWithIndication(k string, n int) (int, bool, error)
	// GetIntNamedOrPosArgDefault returns specific positioned int-typed argument or replace it with default if none found.
	GetIntNamedOrPosArgDefault(k string, n int, d int) (int, error)

	GetIntOrInfArg(n int) (IntOrInf, error)
	GetIntOrInfArgDefault(n int, d IntOrInf) (IntOrInf, error)
	GetIntOrInfNamedOrPosArgDefault(k string, n int, d IntOrInf) (IntOrInf, error)

	GetNamedArg(name string) Expr

	// GetBoolArgDefault returns n-th argument as bool. It will replace it with Default value if none present.
	GetBoolArgDefault(n int, b bool) (bool, error)
	// GetBoolNamedOrPosArgDefault returns specific positioned bool-typed argument or replace it with default if none found.
	GetBoolNamedOrPosArgDefault(k string, n int, b bool) (bool, error)

	// GetNodeOrTagArgs returns the last arguments starting from the n-th as a slice of NodeOrTag structures. If `single` is `true`, only the n-th argument is taken.
	GetNodeOrTagArgs(n int, single bool) ([]NodeOrTag, error)

	IsInterfaceNil() bool
	// contains filtered or unexported methods
}

type ExprType int

type IntOrInf struct {
	IsInf  bool
	IntVal int
}

type MetricRequest struct {
	Metric string
	From   int64
	Until  int64
}

type NamedArgs map[string]interface{}

type NodeOrTag struct {
	IsTag bool
	Value interface{}
}