symbols

Documentation

Overview

Support for the symbols of the language defined by the input grammar, G. This package supports code generation.

Index

• type Symbols
  • func NewSymbols(grammar *ast.Grammar) *Symbols
  • func (this *Symbols) Add(symbols ...string)
  • func (this *Symbols) Id(typ int) string
  • func (this *Symbols) IsTerminal(sym string) bool
  • func (this *Symbols) List() []string
  • func (this *Symbols) ListStringLitSymbols() []string
  • func (this *Symbols) ListTerminals() []string
  • func (this *Symbols) NTId(idx int) string
  • func (this *Symbols) NTList() []string
  • func (this *Symbols) NTType(symbol string) int
  • func (this *Symbols) NumNTSymbols() int
  • func (this *Symbols) NumSymbols() int
  • func (this *Symbols) String() string
  • func (this *Symbols) StringLitType(id string) int
  • func (this *Symbols) Type(id string) int

Types

type Symbols

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

func NewSymbols

func NewSymbols(grammar *ast.Grammar) *Symbols

func (*Symbols) Add

func (this *Symbols) Add(symbols ...string)

func (*Symbols) Id

func (this *Symbols) Id(typ int) string

func (*Symbols) IsTerminal

func (this *Symbols) IsTerminal(sym string) bool

func (*Symbols) List

func (this *Symbols) List() []string

func (*Symbols) ListStringLitSymbols

func (this *Symbols) ListStringLitSymbols() []string

ListStringLitSymbols will return a slice containing the ids of all symbols declared as string literals in the grammar.

func (*Symbols) ListTerminals

func (this *Symbols) ListTerminals() []string

func (*Symbols) NTId

func (this *Symbols) NTId(idx int) string

NTId will return the id of the NT with index idx, or "" if there is no NT symbol with index, idx.

func (*Symbols) NTList

func (this *Symbols) NTList() []string

NTList returns a slice containing all the non-terminal symbols of the grammar.

func (*Symbols) NTType

func (this *Symbols) NTType(symbol string) int

NTType returns the NT index of a symbol (index in 0..|NT|-1) or -1 if the symbol is not in NT.

func (*Symbols) NumNTSymbols

func (this *Symbols) NumNTSymbols() int

NumNTSymbols will return the number of NT symbols in the grammar.

func (*Symbols) NumSymbols

func (this *Symbols) NumSymbols() int

NumSymbols returns the total number of symbols in grammar: the sum of the terminals and non-terminals.

func (*Symbols) String

func (this *Symbols) String() string

func (*Symbols) StringLitType

func (this *Symbols) StringLitType(id string) int

func (*Symbols) Type

func (this *Symbols) Type(id string) int