[Ongoing] Rewrite frontend to use Flex/Bison

This is a merge of another experiment, so the changes are large:

- separated "modules" directory into frontend/backend
  - adjusted module names and moved files for this to happen
- removed modules lexer & parser
- removed all the unit tests (most were outdated)
- added Bison, flex, and C development tools to manifest.scm
- added lexer.l, a source file used by the flex utility with a functioning lexing implementation
- added parser.y, a source file used by the bison utility with a functioning parser implementation
- added node.c and node.h, which parser.y uses to construct an AST of a C source file (up to binary ops)
- added driver.c, a Guile-C interface that provides a module to scheme programs
- added a Makefile to make all of this
- added stuff to .gitignore

1 files changed, 0 insertions, 15 deletions

diff --git a/src/modules/utils/assign-stack.scm b/src/modules/utils/assign-stack.scm
deleted file mode 100644
index 1096846..0000000
--- a/src/modules/utils/assign-stack.scm
+++ /dev/null
@@ -1,15 +0,0 @@
-(define-module (utils assign-stack)
-  #:export (make-location
-            get-frame-size))
-
-
-(define make-location)
-(define get-frame-size)
-(let ((dict (make-hash-table))
-      (ptr 0))
-  (set! make-location
-        (lambda (id)
-          (or (hash-ref dict id)
-              (begin (set! ptr (1+ ptr))
-                     (hash-set! dict id (get-frame-size))))))
-  (set! get-frame-size (lambda () (* -4 ptr))))