はてなブックマーク - Ruby/Racc: パースに失敗した位置（行、桁）を得る - Qiita
https://b.hatena.ne.jp/entry/s/qiita.com/sonota88/items/f55c1654fe101fa0e557
# parser.y class Parser rule program: "a" "b" "c" "d" ";" { puts "program found" result = val } end ---- header TokenValue = Struct.new(:value, :pos) ---- inner def initialize(src, tokens) @src = s...
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Hiro_Matsuno
https://b.hatena.ne.jp/Hiro_Matsuno/20210101#bookmark-4696452708488888578
2021-01-01T12:35:59Z
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sonota88
https://b.hatena.ne.jp/sonota88/20210101#bookmark-4696452708488888578
2021-01-01T10:24:24Z
Ruby
Racc