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-rw-r--r--src/interp/sys-constants.boot3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/interp/sys-constants.boot b/src/interp/sys-constants.boot
index 51bdfea0..25382ba9 100644
--- a/src/interp/sys-constants.boot
+++ b/src/interp/sys-constants.boot
@@ -427,6 +427,9 @@ $String ==
$Symbol ==
'(Symbol)
+++ The Identifier domain form
+$Identifier ==
+ '(Identifier)
++ The 'wildcar' for a type -- "?" in Spad syntax. This stands for
++ an unspecified type.