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Lexical Environment

https://tc39.es/ecma262/#sec-lexical-environment-operations

The following operations are used to operate upon lexical environments This is the entrypoint to lexical environments.

Structs

An error that occurred during lexing or compiling of the source input.

Enums

Give each environment an easy way to declare its own type This helps with comparisons
The scope of a given variable

Type Definitions

Environments are wrapped in a Box and then in a GC wrapper