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Allow a program to have macros expand into a top-level import expression.

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This commit is contained in:
Justin Ethier 2017-10-06 18:43:30 -04:00
parent ad4309416a
commit d0772c2238
2 changed files with 46 additions and 3 deletions
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6
CHANGELOG.md
View file

@ -1,5 +1,11 @@
# Changelog
## 0.7 - TBD
Features
- Allow a program to have macros expand into a top-level `import` expression.
## 0.6.3 - September 16, 2017
Features

43
cyclone.scm
View file

@ -29,7 +29,7 @@
; c-compile-and-emit : (string -> A) exp -> void
(define (c-compile-and-emit input-program program:imports/code
lib-deps src-file append-dirs prepend-dirs)
lib-deps change-lib-deps! src-file append-dirs prepend-dirs)
(call/cc
(lambda (return)
(define globals '())
@ -173,6 +173,36 @@
(trace:info "---------------- after macro expansion cleanup:")
(trace:info input-program) ;pretty-print
;; If a program, check to see if any macros expanded into top-level imports
(when program?
(let ((program:imports/code (import-reduction input-program (base-expander))))
(when (not (null? (car program:imports/code)))
;(trace:info "debug")
;(trace:info program:imports/code)
(trace:info "-------------- macro expanded into import expression(s):")
(set! imports (append imports (car program:imports/code)))
(trace:info "imports:")
(trace:info imports)
(set! imported-vars (lib:imports->idb imports append-dirs prepend-dirs))
(trace:info "resolved imports:")
(trace:info imported-vars)
(let ((meta (lib:resolve-meta imports append-dirs prepend-dirs)))
(set! *defined-macros* (append meta *defined-macros*))
(trace:info "resolved macros:")
(trace:info meta))
(set! input-program (cdr program:imports/code))
;(set! lib-deps (append lib-deps (lib:get-all-import-deps (car program:imports/code) append-dirs prepend-dirs)))
(let ((new-lib-deps (lib:get-all-import-deps (car program:imports/code) append-dirs prepend-dirs)))
(for-each
(lambda (dep)
(if (not (member dep lib-deps))
(set! lib-deps (cons dep lib-deps))))
new-lib-deps)
(change-lib-deps! lib-deps))
(trace:info lib-deps)
)))
;; END additional top-level imports
;; Separate global definitions from the rest of the top-level code
(set! input-program
(isolate-globals input-program program? lib-name rename-env))
@ -531,8 +561,15 @@
(with-output-to-file
src-file
(lambda ()
(c-compile-and-emit program program:imports/code
lib-deps in-file append-dirs prepend-dirs)))))
(c-compile-and-emit
program
program:imports/code
lib-deps
(lambda (new-lib-deps)
(set! lib-deps new-lib-deps))
in-file
append-dirs
prepend-dirs)))))
(result (create-c-file in-prog)))
;; Compile the generated C file