This is preliminary version of the Rust compiler(s).
Source layout:
boot/ The bootstrap compiler
boot/README - More-detailed guide to it.
boot/fe - Front end (lexer, parser, AST)
boot/me - Middle end (resolve, check, layout, trans)
boot/be - Back end (IL, RA, insns, asm, objfiles)
boot/util - Ubiquitous helpers
boot/driver - Compiler driver
comp/ The self-hosted compiler ("rustc": incomplete)
comp/* - Similar structure as in boot/
rt/ The runtime system
rt/rust_*.cpp - The majority of the runtime services
rt/isaac - The PRNG used for pseudo-random choices in the runtime
rt/bigint - The bigint library used for the 'big' type
rt/uthash - Small hashtable-and-list library for C, used in runtime
rt/{sync,util} - Small utility classes for the runtime.
test/ Testsuite (for both bootstrap and self-hosted)
test/compile-fail - Tests that should fail to compile
test/run-fail - Tests that should compile, run and fail
test/run-pass - Tests that should compile, run and succeed
Please be gentle, it's a work in progress.