Interpreterパターンは、翻訳者(Interpreter)によって翻訳された指示に従って処理する構造。
23．Interpreter パターン | TECHSCORE(テックスコア)
main.cppで、
式を解析して、計算結果を出力する簡単なインタプリター実装した。
$ $ vi main.cpp $ g++ -o main main.cpp term.cpp expression.cpp $ ./main str = ((1 + 2) * 3 - 4) / 5 str = ((1 + 2) * 3 - 4) / 5 str = ((1 + 2) * 3 - 4) str = (1 + 2) * 3 str = (1 + 2) * 3 str = (1 + 2) str = 1 str = 1 operand1_str = 1 operand2_str = operator_ = operand1_str = 1 operand2_str = operator_ = str = 2 str = 2 operand1_str = 2 operand2_str = operator_ = operand1_str = 2 operand2_str = operator_ = operand1_str = 1 operand2_str = 2 operator_ = + str = 3 str = 3 operand1_str = 3 operand2_str = operator_ = operand1_str = 3 operand2_str = operator_ = operand1_str = (1 + 2) operand2_str = 3 operator_ = * operand1_str = (1 + 2) * 3 operand2_str = operator_ = str = 4 str = 4 operand1_str = 4 operand2_str = operator_ = operand1_str = 4 operand2_str = operator_ = operand1_str = (1 + 2) * 3 operand2_str = 4 operator_ = - str = 5 str = 5 operand1_str = 5 operand2_str = operator_ = operand1_str = 5 operand2_str = operator_ = operand1_str = ((1 + 2) * 3 - 4) operand2_str = 5 operator_ = / operand1_str = ((1 + 2) * 3 - 4) / 5 operand2_str = operator_ = result = 1 $
とりあえず、この場合は動いた。
Sample/designpattern/interpreter/interpreter/src/interpreter at master · bg1bgst333/Sample · GitHub
