design

Reading To do macros we need to read. To read we need to match delimiters and build a token tree to know where a macro invocation ends. But JS complicates this because delimiters can appear inside of a regex literal and deciding if / is the start of a regex or the division operator depends on parsing context. The read algorithm follows but see also the DLS 14 paper which goes into more detail. Giv

[t-wada]

sweet.js がコード内のスラッシュが正規表現の開始かそれとも division operator かを判別するアルゴリズムの解説

[efcl]

sweet.jsの 正規表現リテラルと//コメントをどうやって見分けるかのアルゴリズムデザイン via http://disnetdev.com/blog/2012/12/20/how-to-read-macros/