Add MAP type, map literals, map indexing and map ops; small spec clarifications

Introduce an N-dimensional associative MAP type and its literal syntax <key = value, ...>, including nested maps and angle-bracket indexing m<k1,k2>.
Specify insertion-order preservation, sparse/non-rectangular maps, on-demand creation of intermediate nested maps, and static typing of map entries; add DEL(map<k>) for deletion.
Add built-in operators SIGNATURE, COPY, DEEPCOPY, KEYS, VALUES, KEYIN, VALUEIN.
Rename/document builtin convolution operator from CONVOLVE to CONV.
Clarify function signature spacing and tweak identifier character-set examples (removed </> from the listed punctuation).

Author: python-processing-unit

SPECIFICATION.html

@@ -56,7 +56,7 @@ def _parse_statements_from_source(text: str, filename: str, *, type_names: Optio
 
 def run_repl(*, verbose: bool, services) -> int:
     print("\x1b[38;2;153;221;255mASM-Lang\033[0m REPL. Enter statements, blank line to run buffer.") # "ASM-Lang" in light blue
-    # Use "<string>" as the REPL's effective source filename so that MAIN() and imports behave
+    # Use "<repl>" as the REPL's effective source filename so that MAIN() and imports behave
     had_output = False
     def _output_sink(text: str) -> None:
         nonlocal had_output
@@ -89,7 +89,7 @@ def _output_sink(text: str) -> None:
     try:
         interpreter = Interpreter(
             source="",
-            filename="<string>",
+            filename="<repl>",
             verbose=verbose,
             services=services,
             input_provider=(lambda: input()),
@@ -130,7 +130,7 @@ def _output_sink(text: str) -> None:
 
         if not buffer and stripped != "" and not is_block_start:
             try:
-                statements = _parse_statements_from_source(line, "<string>", type_names=interpreter.type_registry.names())
+                statements = _parse_statements_from_source(line, "<repl>", type_names=interpreter.type_registry.names())
                 try:
                     interpreter._execute_block(statements, global_env)
                 except ExitSignal as sig:
@@ -152,7 +152,7 @@ def _output_sink(text: str) -> None:
             source_text = "\n".join(buffer)
             buffer.clear()
             try:
-                statements = _parse_statements_from_source(source_text, "<string>", type_names=interpreter.type_registry.names())
+                statements = _parse_statements_from_source(source_text, "<repl>", type_names=interpreter.type_registry.names())
                 interpreter._execute_block(statements, global_env)
             except ExitSignal as sig:
                 return sig.code
@@ -249,7 +249,7 @@ def run_cli(argv: Optional[List[str]] = None) -> int:
 
     if args.source_mode:
         source_text = program
-        filename = "<string>"
+        filename = "<repl>"
     else:
         filename = program
         try:

asm-lang.exe

@@ -400,6 +400,7 @@ def build_default_services() -> RuntimeServices:
     services.type_registry.seal("FLT")
     services.type_registry.seal("STR")
     services.type_registry.seal("TNS")
+    services.type_registry.seal("MAP")
     services.type_registry.seal("FUNC")
     return services