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Diffstat (limited to 'module/language/tree-il/spec.scm')
-rw-r--r-- | module/language/tree-il/spec.scm | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/module/language/tree-il/spec.scm b/module/language/tree-il/spec.scm index c47134ed8..b2ebcfcab 100644 --- a/module/language/tree-il/spec.scm +++ b/module/language/tree-il/spec.scm @@ -20,6 +20,7 @@ (define-module (language tree-il spec) #:use-module (system base language) + #:use-module (system base pmatch) #:use-module (language glil) #:use-module (language tree-il) #:use-module (language tree-il compile-glil) @@ -29,7 +30,10 @@ (apply write (unparse-tree-il exp) port)) (define (join exps env) - (make-sequence #f exps)) + (pmatch exps + (() (make-void #f)) + ((,x) x) + (else (make-sequence #f exps)))) (define-language tree-il #:title "Tree Intermediate Language" |