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kosen13s / tiny

A tiny programming language to improve kosen13s' skills
MIT License
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How construct concrete data from syntax trees #15

Open Iruyan-Zak opened 7 years ago

Iruyan-Zak commented 7 years ago

Now, LexicalTree express a tree of String. In semantic parsing phase, probably we need to construct data from String tree.

Type information can be added in this phase, but it requires second scan nevertheless first scan is done in lexical parsing phase. Type information is owned by only Token s that can be become Leaf of Tree. (Literal and Identifier) The former can get a type information in lexical parsing phase, but latter cannot.

Based on the above, I'm coming up with two way.

  1. Add type information to Literal in lexical parsing phase. To Identifier, adding it in semantic parsing phase.
  2. Type information is added to all Leaf element in only semantic parsing phase.

Or do you have ideas? I need your opinion.

Roadagain commented 6 years ago

the 2nd way looks better. i think adding type information should not be split.

Iruyan-Zak commented 6 years ago

OK, doing it.