Check for table size (in parser, thus tests are for syntax.)

src/sixtypical/parser.py

@@ -146,6 +146,8 @@ class Parser(object):
 
         if self.scanner.consume('table'):
             size = self.defn_size()
+            if size not in (1, 2, 4, 8, 16, 32, 64, 129, 256):
+                raise SyntaxError("Table size must be a power of two, 0 < size <= 256")
             type_ = TableType(type_, size)
 
         return type_

tests/SixtyPical Analysis.md

@@ -533,34 +533,6 @@ You can also copy a literal word to a word table.
 
 #### tables: range checking ####
 
-A table may not have more than 256 entries.
-
-    | word table[512] many
-    | 
-    | routine main
-    |   inputs many
-    |   outputs many
-    |   trashes a, x, n, z
-    | {
-    |     ld x, 0
-    |     copy 9999, many + x
-    | }
-    ? zzzzz
-
-The number of entries in a table must be a power of two.
-
-    | word table[48] many
-    | 
-    | routine main
-    |   inputs many
-    |   outputs many
-    |   trashes a, x, n, z
-    | {
-    |     ld x, 0
-    |     copy 9999, many + x
-    | }
-    ? zzzz
-
 If a table has fewer than 256 entries, it cannot be read or written
 beyond the maximum number of entries it has.
 

tests/SixtyPical Syntax.md

@@ -153,6 +153,45 @@ Tables of different types.
     | }
     = ok
 
+The number of entries in a table must be a power of two
+which is greater than 0 and less than or equal to 256.
+
+    | word table[512] many
+    | 
+    | routine main
+    |   inputs many
+    |   outputs many
+    |   trashes a, x, n, z
+    | {
+    |     ld x, 0
+    |     copy 9999, many + x
+    | }
+    ? SyntaxError
+
+    | word table[48] many
+    | 
+    | routine main
+    |   inputs many
+    |   outputs many
+    |   trashes a, x, n, z
+    | {
+    |     ld x, 0
+    |     copy 9999, many + x
+    | }
+    ? SyntaxError
+
+    | word table[0] many
+    | 
+    | routine main
+    |   inputs many
+    |   outputs many
+    |   trashes a, x, n, z
+    | {
+    |     ld x, 0
+    |     copy 9999, many + x
+    | }
+    ? SyntaxError
+
 Typedefs of different types.
 
     | typedef byte octet