operator

type ApplierFunc ¶

type ApplierFunc func(...gjson.Result) gjson.Result

ApplierFunc represents the function that is performed by an operator, taking a variable number of inputs as gjson.Result and returning again a gjson.Result

type OperandTypeError ¶

type OperandTypeError struct {
	// contains filtered or unexported fields
}

OperandTypeError is an error that indicates a wrong type of input variable given into an operation

This error is caused by the user of the library and shall therefore be passed up to the CLI

type Operator ¶

type Operator struct {
	Identifier    string
	Sign          string
	Associativity int
	Precedence    int
	ArgTypes      []json.Type
	Apply         ApplierFunc
}

Operator is a function with the given name *Identifier*, that is performed on input values whenever *OperatorSign* is between them (infix). The input arguments of that function have to be of the types specified in *ArgTypes*. The precedence of the operator is defined in the corresponding attribute, with 1 being the lowest precedence (usually the select operator). The actual function is included in *Apply*.

The types of input arguments is checked before calling the function thus it can be assumed without further type checking that input arguments to the ApplierFunc are of the necessary types.

func GetOperator(literal string) *Operator