From b70f41840819a59f82a37c0da7eddae40fc52aa0 Mon Sep 17 00:00:00 2001 From: Ryo Nihei Date: Sun, 29 Aug 2021 21:10:42 +0900 Subject: Add describe command to print a description file --- grammar/symbol.go | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'grammar/symbol.go') diff --git a/grammar/symbol.go b/grammar/symbol.go index 136e909..3a7dfb6 100644 --- a/grammar/symbol.go +++ b/grammar/symbol.go @@ -249,6 +249,20 @@ func (t *symbolTable) terminalTexts() ([]string, error) { return t.termTexts, nil } +func (t *symbolTable) nonTerminalSymbols() []symbol { + syms := make([]symbol, 0, t.nonTermNum.Int()-nonTerminalNumMin.Int()) + for sym := range t.sym2Text { + if !sym.isNonTerminal() || sym.isNil() { + continue + } + syms = append(syms, sym) + } + sort.Slice(syms, func(i, j int) bool { + return syms[i] < syms[j] + }) + return syms +} + 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") -- cgit v1.2.3