lcc

Those aren’t necessarily written as people would do it today, but Knuth’s literate sources for TeX[1] and METAFONT[2] are explicitly meant for reading. The literate program family also includes LCC[3], but A retargetable C compiler is a book that you’d need to buy; and PBRT[4], but Physically based rendering is more exposition than program (even if the program is a perfectly good one). The source for Unix V6[5] with the accompanying commentary by Lions is probably as much of a classic as it’s possible to get. And as an eccentric choice in a similar format, may I suggest cmForth[6], perhaps paired with Footsteps in an empty valley[7]? Also, though this is not precisely what you’re asking for, The architecture of open-source applications and its sequels[8] have the original designers’ reflections on some well-known codebases. [1] http://mir

I have written the Go arm64 and sparc64 compilers, as well as several other proprietary production compilers for several languages. The Dragon Book is the best, for sure, and in my opinion essential material. Many people find its style too dry. It's basically a reference, not a tutorial. If you want something more hands on, I recommend this book about LCC[1]. It covers LCC, which is a C compiler. It's not a generic book about writing compilers, but I believe to be very useful anyway because it's very hands on. The current version of LCC is here[2]: Not sure if you can regenerate the book out of the current code or not (LCC is written in literate programming style, and the book used to be just the literate part). [1] A Retargetable C Compiler: Design and Implementation (Addison-Wesley, 1995, ISBN 0-8053-1670-1) [2] https://github.com/drh/l

LCC's for statement is also clean and understandable. https://github.com/drh/lcc/blob/master/src/stmt.c#L263

From the thesis abstract: >"Included with this thesis is a portable C compiler for stack machines, which incorporates these new register allocation methods. The C compiler and associated tools (assembler, linker and simulator) are included in the CD." I looked at Mark Shannon's page below but didn't find a link to an ISO image of the mentioned CD. http://www.dcs.gla.ac.uk/~marks/ As far as I can tell from a quick (and very casual) skimming, Mark's lcc-s is implemented as a backend for lcc. http://www.cs.princeton.edu/software/lcc/ https://sites.google.com/site/lccretargetablecompiler/ https://github.com/drh/lcc/tree/master If anyone has found the mentioned lcc-s code, please post a link.

This is a technique I first came across in the code for lcc, as described in David R. Hanson's book "A Retargetable C Compiler: Design and Implementation". https://sites.google.com/site/lccretargetablecompiler/ The code in that book feels pretty dated in a lot of places, but this was a neat trick. Every piece of information related to a token is defined in one place: https://github.com/drh/lcc/blob/master/src/token.h Then here's how it's used: https://github.com/drh/lcc/blob/master/src/expr.c#L8 https://github.com/drh/lcc/blob/master/src/output.c#L107

lcc(1) the C compiler. As well as having readable C source, you'd learn something about the innards of C, how it is implemented, and there's a good accompanying book by Fraser and Hanson that covers the complete source as a "literate program". https://github.com/drh/lcc/blob/master/src/lex.c http://www.amazon.com/exec/obidos/ASIN/0805316701/mqq-20