Signed Units and Namespaces

When ``unitsig.ss'' is required, the following names are bound to the corresponding non-#% syntax:

•  #%define-signature
•  #%let-signature
•  #%unit-with-signature
•  #%compound-unit-with-signature
•  #%invoke-unit-with-signature
•  #%invoke-open-unit-with-signature
•  #%unit->unit-with-signature

The procedure  install-unit-with-signature takes a namespace and copies these #%-prefixed syntax names (from the current namespace) into the given namespace, along with all of the procedure support for signed units. In addition, the global #%unit-with-signature-installed is defined; if ``unitsig.ss'' is required in a namespace where #%unit-with-siganture-installed is defined, the non-#% syntax names for signed units will be defined to use the installed support procedures and #%-prefixed syntax names.