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make default-environment a zero-ary procedure

This commit is contained in:
Yuichi Nishiwaki 2017-04-15 02:56:31 +09:00
parent dfe8e87e65
commit b89de785ee
2 changed files with 1650 additions and 1648 deletions
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3291
lib/ext/eval.c
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7
piclib/eval.scm
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@ -112,7 +112,8 @@
core#if
core#begin
core#define-macro))
env))
(lambda ()
env)))
(define (extend-environment parent)
(%make-environment parent #f (make-ephemeron-table)))
@ -224,7 +225,7 @@
(error "invalid expression" expr))))
(define (expand expr . env)
(let ((x (expand-node expr (if (null? env) default-environment (car env)))))
(let ((x (expand-node expr (if (null? env) (default-environment) (car env)))))
(run-all)
x))
@ -253,7 +254,7 @@
(dictionary-set! (macro-objects) name transformer))
(define (the var)
(make-identifier var default-environment))
(make-identifier var (default-environment)))
(let
;; cache popular identifiers