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+; Macros to verify assumptions about the data or code
+
+table_width: MACRO
+CURRENT_TABLE_WIDTH = \1
+if DEF(CURRENT_TABLE_START)
+PURGE CURRENT_TABLE_START
+endc
+if _NARG == 2
+CURRENT_TABLE_START EQUS "\2"
+else
+CURRENT_TABLE_START EQUS "._table_width\@"
+CURRENT_TABLE_START:
+endc
+ENDM
+
+assert_table_length: MACRO
+x = \1
+ assert x * CURRENT_TABLE_WIDTH == @ - CURRENT_TABLE_START, \
+ "{CURRENT_TABLE_START}: expected {d:x} entries, each {d:CURRENT_TABLE_WIDTH} bytes"
+ENDM