shithub: femtolisp

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updating interpreter to work better for bootstrapping
adding program mkboot0, which can be run in the interpreter to compile
source files into a stage-0 boot image.

--- /dev/null

+++ b/femtolisp/mkboot0.lsp

@@ -1,0 +1,19 @@

+; -*- scheme -*-

+

+(if (not (bound? 'top-level-value)) (set! top-level-value %eval))

+(if (not (bound? 'set-top-level-value!)) (set! set-top-level-value! set))

+

+(load "compiler.lsp")

+

+(define (compile-file inf)

+  (let ((in  (file inf :read)))

+    (let next ((E (read in)))

+      (if (not (io.eof? in))

+	  (begin (print (compile-thunk (expand E)))

+		 (princ "\n")

+		 (next (read in)))))

+    (io.close in)))

+

+(for-each (lambda (file)

+	    (compile-file file))

+	  (cdr *argv*))

--- a/femtolisp/read.c

+++ b/femtolisp/read.c

@@ -575,8 +575,14 @@

         // cannot see pending labels. in other words:

         // (... #2=#.#0# ... )    OK

         // (... #2=#.(#2#) ... )  DO NOT WANT

-        v = do_read_sexpr(UNBOUND);

-        return toplevel_eval(v);

+        sym = do_read_sexpr(UNBOUND);

+        if (issymbol(sym)) {

+            v = symbol_value(sym);

+            if (v == UNBOUND)

+                raise(list2(UnboundError, sym));

+            return v;

+        }

+        return toplevel_eval(sym);

     case TOK_LABEL:

         // create backreference label

         if (ptrhash_has(&readstate->backrefs, (void*)tokval))