boolean

Documentation

Overview

Package boolean contains builtins and syntax for boolean values.

Index

• func AndS(eng *eval.Engine, env sxpf.Environment, args *sxpf.List) (eval.Expr, error)
• func Boolean(args []sxpf.Object) (sxpf.Object, error)
• func BooleanP(args []sxpf.Object) (sxpf.Object, error)
• func Not(args []sxpf.Object) (sxpf.Object, error)
• func OrS(eng *eval.Engine, env sxpf.Environment, args *sxpf.List) (eval.Expr, error)
• type AndExpr
  • func (ae *AndExpr) Compute(eng *eval.Engine, env sxpf.Environment) (sxpf.Object, error)
• type OrExpr
  • func (oe *OrExpr) Compute(eng *eval.Engine, env sxpf.Environment) (sxpf.Object, error)

Functions

func AndS

func AndS(eng *eval.Engine, env sxpf.Environment, args *sxpf.List) (eval.Expr, error)

AndS parses an and statement: (and expr...).

func Boolean

func Boolean(args []sxpf.Object) (sxpf.Object, error)

Boolean negates the given value interpreted as a boolean.

func BooleanP

func BooleanP(args []sxpf.Object) (sxpf.Object, error)

BooleanP is the boolean that returns true if the argument is a number.

func Not

func Not(args []sxpf.Object) (sxpf.Object, error)

Not negates the given value interpreted as a boolean.

func OrS

func OrS(eng *eval.Engine, env sxpf.Environment, args *sxpf.List) (eval.Expr, error)

OrS parses an or statement: (or expr...).

Types

type AndExpr

type AndExpr struct {
	Front []eval.Expr // all expressions, but the last
	Last  eval.Expr
}

AndExpr represents the and form.

func (*AndExpr) Compute

func (ae *AndExpr) Compute(eng *eval.Engine, env sxpf.Environment) (sxpf.Object, error)

type OrExpr

type OrExpr struct {
	Front []eval.Expr // all expressions, but the last
	Last  eval.Expr
}

OrExpr represents the and form.

func (*OrExpr) Compute

func (oe *OrExpr) Compute(eng *eval.Engine, env sxpf.Environment) (sxpf.Object, error)