diff options
Diffstat (limited to 'grammar/symbol.go')
-rw-r--r-- | grammar/symbol.go | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/grammar/symbol.go b/grammar/symbol.go index ae6000c..9c0e9bd 100644 --- a/grammar/symbol.go +++ b/grammar/symbol.go @@ -2,6 +2,7 @@ package grammar import ( "fmt" + "sort" ) type symbolKind string @@ -224,14 +225,28 @@ func (t *symbolTable) toText(sym symbol) (string, bool) { return text, ok } -func (t *symbolTable) getTerminalTexts() ([]string, error) { +func (t *symbolTable) terminalSymbols() []symbol { + syms := make([]symbol, 0, t.termNum.Int()-terminalNumMin.Int()) + for sym := range t.sym2Text { + if !sym.isTerminal() || sym.isNil() || sym.isEOF() { + continue + } + syms = append(syms, sym) + } + sort.Slice(syms, func(i, j int) bool { + return syms[i] < syms[j] + }) + return syms +} + +func (t *symbolTable) terminalTexts() ([]string, error) { if t.termNum == terminalNumMin { return nil, fmt.Errorf("symbol table has no terminals") } return t.termTexts, nil } -func (t *symbolTable) getNonTerminalTexts() ([]string, error) { +func (t *symbolTable) nonTerminalTexts() ([]string, error) { if t.nonTermNum == nonTerminalNumMin || t.nonTermTexts[symbolStart.num().Int()] == "" { return nil, fmt.Errorf("symbol table has no terminals or no start symbol") } |