parser

type Function struct {
	Token string
	// The number of parameters this function accepts
	Params int
}

type Operator struct {
	Token string
	// Whether the operator is left/right/or not associative
	Association int
	// The number of operands this operator operates on
	Operands int
	// Rank of precedence
	Precedence int
}

type OrderItem struct {
	Field string
	Order string
}

type ParseNode struct {
	Token    *Token
	Parent   *ParseNode
	Children []*ParseNode
}

type Parser struct {
	// Map from string inputs to operator types
	Operators map[string]*Operator
	// Map from string inputs to function types
	Functions map[string]*Function
}

type Token struct {
	Value interface{}
	Type  int
	// contains filtered or unexported fields
}

type TokenMatcher struct {
	Pattern string
	Re      *regexp.Regexp
	Token   int
}

type Tokenizer struct {
	TokenMatchers  []*TokenMatcher
	IgnoreMatchers []*TokenMatcher
}