MLton 20210117

# FrontEnd

FrontEnd is a translation pass from source to the AST IntermediateLanguage.

## Description

This pass performs lexing and parsing to produce an abstract syntax tree.

## Implementation

- front-end.sig

- front-end.fun

## Details and Notes

The lexer is produced by MLLex from ml.lex.

The parser is produced by MLYacc from ml.grm.

The specifications for the lexer and parser were originally taken from SML/NJ (version 109.32), but have been heavily modified since then.