ast

package
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Published: Sep 2, 2024 License: Apache-2.0 Imports: 7 Imported by: 0

Documentation

Overview

Package ast holds ast related files

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type ArithmeticElement added in v0.46.0

type ArithmeticElement struct {
	Op      string        `parser:"@( \"+\" | \"-\" )"`
	Operand *BitOperation `parser:"@@"`
}

ArithmeticElement defines an arithmetic element

type ArithmeticOperation added in v0.46.0

type ArithmeticOperation struct {
	Pos lexer.Position

	First *BitOperation        `parser:"@@"`
	Rest  []*ArithmeticElement `parser:"[ @@ { @@ } ]"`
}

ArithmeticOperation describes an arithmetic operation

type Array

type Array struct {
	Pos lexer.Position

	CIDR          *string        `parser:"@CIDR"`
	Variable      *string        `parser:"| @Variable"`
	Ident         *string        `parser:"| @Ident"`
	StringMembers []StringMember `parser:"| \"[\" @@ { \",\" @@ } \"]\""`
	CIDRMembers   []CIDRMember   `parser:"| \"[\" @@ { \",\" @@ } \"]\""`
	Numbers       []int          `parser:"| \"[\" @Int { \",\" @Int } \"]\""`
	Idents        []string       `parser:"| \"[\" @Ident { \",\" @Ident } \"]\""`
}

Array describes an array of values

type ArrayComparison

type ArrayComparison struct {
	Pos lexer.Position

	Op    *string `parser:"( @( \"in\" | \"not\" \"in\" | \"allin\" )"`
	Array *Array  `parser:"@@ )"`
}

ArrayComparison describes an operation that tests membership in an array

type BitOperation

type BitOperation struct {
	Pos lexer.Position

	Unary *Unary        `parser:"@@"`
	Op    *string       `parser:"[ @( \"&\" | \"|\" | \"^\" )"`
	Next  *BitOperation `parser:"@@ ]"`
}

BitOperation describes an operation on bits

type BooleanExpression

type BooleanExpression struct {
	Pos lexer.Position

	Expression *Expression `parser:"@@"`
}

BooleanExpression describes a boolean expression

type CIDRMember added in v0.36.0

type CIDRMember struct {
	Pos lexer.Position

	IP   *string `parser:"@IP"`
	CIDR *string `parser:"| @CIDR"`
}

CIDRMember describes a CIDR based array member

type Comparison

type Comparison struct {
	Pos lexer.Position

	ArithmeticOperation *ArithmeticOperation `parser:"@@"`
	ScalarComparison    *ScalarComparison    `parser:"[ @@"`
	ArrayComparison     *ArrayComparison     `parser:"| @@ ]"`
}

Comparison describes a comparison

type Expression

type Expression struct {
	Pos lexer.Position

	Comparison *Comparison        `parser:"@@"`
	Op         *string            `parser:"[ @( \"|\" \"|\" | \"or\" | \"&\" \"&\" | \"and\" )"`
	Next       *BooleanExpression `parser:"@@ ]"`
}

Expression describes an expression

type Macro

type Macro struct {
	Pos lexer.Position

	Expression *Expression `parser:"@@"`
	Array      *Array      `parser:"| @@"`
	Primary    *Primary    `parser:"| @@"`
}

Macro describes a SECL macro

type ParsingContext added in v0.42.0

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

ParsingContext defines a parsing context

func NewParsingContext added in v0.42.0

func NewParsingContext() *ParsingContext

NewParsingContext returns a new parsing context

func (*ParsingContext) ParseMacro added in v0.42.0

func (pc *ParsingContext) ParseMacro(expr string) (*Macro, error)

ParseMacro parses a SECL macro

func (*ParsingContext) ParseRule added in v0.42.0

func (pc *ParsingContext) ParseRule(expr string) (*Rule, error)

ParseRule parses a SECL rule.

type Primary

type Primary struct {
	Pos lexer.Position

	Ident         *string     `parser:"@Ident"`
	CIDR          *string     `parser:"| @CIDR"`
	IP            *string     `parser:"| @IP"`
	Number        *int        `parser:"| @Int"`
	Variable      *string     `parser:"| @Variable"`
	String        *string     `parser:"| @String"`
	Pattern       *string     `parser:"| @Pattern"`
	Regexp        *string     `parser:"| @Regexp"`
	Duration      *int        `parser:"| @Duration"`
	SubExpression *Expression `parser:"| \"(\" @@ \")\""`
}

Primary describes a single operand. It can be a simple identifier, a number, a string or a full expression in parenthesis

type Rule

type Rule struct {
	Pos  lexer.Position
	Expr string

	BooleanExpression *BooleanExpression `parser:"@@"`
}

Rule describes a SECL rule

type ScalarComparison

type ScalarComparison struct {
	Pos lexer.Position

	Op   *string     `parser:"@( \">\" \"=\" | \">\" | \"<\" \"=\" | \"<\" | \"!\" \"=\" | \"=\" \"=\" | \"=\" \"~\" | \"!\" \"~\" )"`
	Next *Comparison `parser:"@@"`
}

ScalarComparison describes a scalar comparison : the operator with the right operand

type StringMember

type StringMember struct {
	Pos lexer.Position

	String  *string `parser:"@String"`
	Pattern *string `parser:"| @Pattern"`
	Regexp  *string `parser:"| @Regexp"`
}

StringMember describes a String based array member

type Unary

type Unary struct {
	Pos lexer.Position

	Op      *string  `parser:"( @( \"!\" | \"not\" | \"-\" | \"^\" )"`
	Unary   *Unary   `parser:"@@ )"`
	Primary *Primary `parser:"| @@"`
}

Unary describes an unary operation like logical not, binary not, minus

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