refactor: Add AST nodes of infix operations #741
Merged
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What
中置演算子は、今まで関数コールの糖衣構文になっていました。つまりパーサーは中置演算子を見つけると関数コールのASTノードを生成します。
今回の変更では、それらの中置演算子を直接表すASTノードを追加します。
インタプリタが中置演算子のASTノードを見つけるとCore:Add系関数を呼び出すようになっています。
Core:Add系関数はこのPRでは削除していません。
APIの変更はASTノード追加によるものです。
related #706
Why
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