shield

Documentation

Index

• func Eval(root *ast.Expression, env Environment) object.Object
• func Parse(input string) (*ast.Expression, error)
• func Preprocess(ctx context.Context, root *ast.Expression, expander ast.Expander) (*ast.Expression, error)
• type Environment
• type Metadata
  • func ExtractMetadata(root *ast.Expression) (Metadata, error)

Functions

func Eval

func Eval(root *ast.Expression, env Environment) object.Object

Eval evaluates the AST and returns the result of the evaluation. In case of a runtime error, the resulting object will be an error object.

func Parse

func Parse(input string) (*ast.Expression, error)

Parse parses the input string and returns the root node of the AST. In case of syntax errors, it returns an error.

func Preprocess

func Preprocess(ctx context.Context, root *ast.Expression, expander ast.Expander) (*ast.Expression, error)

Preprocess preprocesses the AST using the expander and returns the root node of the new AST.

Types

type Environment

type Environment = env.Environment

type Metadata

type Metadata = metadata.Metadata

func ExtractMetadata

func ExtractMetadata(root *ast.Expression) (Metadata, error)

ExtractMetadata extracts metadata from the given expression.