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Address PR comments

Nathan Shively-Sanders 2016-06-17 09:52:02 -07:00
parent 7dc6c03222
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Compiler-Internals.md

@ -36,10 +36,14 @@ There aren't any surprises in the general implementation style here.
## JSDoc parsing
# Binder
# Checker
The checker is almost 20,000 lines long, and does almost everything that's not syntactic.
Surprisingly, a checker gets created every time the language service requests information because it tries to present an immutable interface.
Since the semantics of a entire program can change dramatically with a couple of keystrokes (e.g. renaming a class), a new checker gets created every time the language service requests information.
Creating a checker is cheap, though, because the compiler as a whole is so lazy.
You just have to create some basic types and get the binder to build the global symbol table.
## Grammatical checking
@ -62,6 +66,3 @@ There is still a small printer that writes any AST back to text.
## Sourcemap generation
# Language service
The language service provides an API for clients to provide edit-time information about a program.
Point it at a directory and it will maintain compilation information about the source in that directory.