interp

Documentation

Overview

Package interp implements the bc interpreter / evaluator.

Index

• func RegisterMathLib(ip *Interp)
• type Interp
  • func New(stdin io.Reader, stdout, stderr io.Writer) *Interp
  • func (ip *Interp) ExecStmts(stmts []parser.Stmt) (quit bool)
  • func (ip *Interp) RegisterFunc(fd *parser.FuncDef)
  • func (ip *Interp) Scale() int
  • func (ip *Interp) SetLineLen(n int)
  • func (ip *Interp) SetScale(s int)
• type RuntimeError
  • func (e *RuntimeError) Error() string

Functions

func RegisterMathLib

func RegisterMathLib(ip *Interp)

RegisterMathLib installs the -l math functions and sets scale=20.

Types

type Interp

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

Interp is the bc interpreter.

func New

func New(stdin io.Reader, stdout, stderr io.Writer) *Interp

New creates an Interp.

func (*Interp) ExecStmts

func (ip *Interp) ExecStmts(stmts []parser.Stmt) (quit bool)

ExecStmts executes a list of statements and returns whether `quit` was signalled.

func (*Interp) RegisterFunc

func (ip *Interp) RegisterFunc(fd *parser.FuncDef)

RegisterFunc registers a function definition.

func (*Interp) Scale

func (ip *Interp) Scale() int

Expose scale for math library.

func (*Interp) SetLineLen

func (ip *Interp) SetLineLen(n int)

func (*Interp) SetScale

func (ip *Interp) SetScale(s int)

type RuntimeError

type RuntimeError struct{ Msg string }

RuntimeError is a non-fatal error (prints message, continues REPL).

func (*RuntimeError) Error

func (e *RuntimeError) Error() string