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+[video member=pervognsen stream_platform=twitch project=bitwise title="Assembler Macro Expansion" vod_platform=youtube id=oGb1Rk37Fh0 annotator=Miblo]
+[0:07][Recap and set the stage for the day][:speech]
+[1:05][Review the new cmd_la() pseudo-instruction][:asm :research]
+[4:03][Review the new two-operand syntax for three-operand instructions][:asm :research]
+[5:48][Review the new partial inference of immediates from operands][:asm :research]
+[7:52][Review the new support for '.' being the first character of an identifier][:asm :research]
+[9:35][Review the new '>' and '<' jump-to-label directives, inspired by the NES Metroid source[ref
+    site=GitHub
+    page="MaximeGir/NES-Metroid-source-code"
+    url=https://github.com/MaximeGir/NES-Metroid-source-code]][:asm :research]
+[15:38][Describe the implementation of anonymous labels][:asm :parsing :research]
+[19:43][Review the load immediate and mov pseudo-instructions][:asm :research]
+[21:53][Q&A][:speech]
+[22:03][@twitchplaysp0ng][Shouldn't 1545 be `lw x3, \[val\]`?][:asm]
+[23:06][@miotatsu][I like all your changes personally, the only thing I would do different is dropping number labels and using the <# ># syntax for referring to anonymous labels. But it's all bikeshed discussion really][:asm]
+[26:35][Macro Expansion][:asm :speech]
+[28:07][Macros, Constant and Parameterised][:asm :language :speech]
+[30:30][Spec'ing out our macros syntax, and considering how to implement it][:asm :language :speech]
+[32:50][Dive right in to implementing macro expansion, separating out next_token() into a new scan_token() function][:asm :language :parsing]
+[43:07][:Run it to see that it does not work][:asm :language :parsing]
+[43:19][Fix next_token() to use the returned token from scan_token()][:asm :language :parsing]
+[43:25][:Run it to see that it works][:asm :language :parsing]
+[43:58][Introduce the notion of a TokenList, and init_scan() to build up that list][:asm :language :parsing]
+[51:24][:Run it to see that it miraculously works][:asm :language :parsing]
+[51:48][Stress test the :"error handling"][:asm :language :parsing :programming :run]
+[54:08][Augment the TokenList with an index][:asm :language :parsing]
+[58:03][:Run it to see that it's okay][:asm :language :parsing]
+[58:27][Introduce the notion of a TokenListStack and its accompanying push_token_list() and pop_token_list() to handle "nested macro" expansion][:asm :language :parsing]
+[1:07:54][:Run it to see that it seems to work][:asm :language :parsing]
+[1:08:13][Embark on the actual macro expansion, introducing cmd_define()][:asm :language :parsing]
+[1:16:02][Add a macro in asm_test()][:asm :language :parsing]
+[1:16:36][:Run it with the macro established in the symbol table][:asm :language :parsing]
+[1:16:40][Enable next_token() to perform macro expansion][:asm :language :parsing]
+[1:18:51][The logic of the macro expansion][:asm :language :parsing :research]
+[1:19:37][Fix next_token() to check that it even got a sym before checking that it is a SYM_MACRO][:asm :language :parsing]
+[1:20:11][:Run it and unexpectedly hit an "Expected name, got integer" error][:asm :language :parsing]
+[1:21:55][Separate some of next_token() out into next_unexpanded_token(), and (temporarily?) require the use of '`' to denote the identifier in macros][:asm :language :parsing]
+[1:28:18][:Run it to see that it works][:asm :language :parsing]
+[1:29:32][Test '`' quoting][:asm :language :parsing]
+[1:29:49][:Run it to see that it doesn't work, and break into next_token() to investigate why][:asm :language :parsing]
+[1:34:10][Temporarily make gen_sync_pos() return without doing anything, in an effort to figure out what's wrong][:asm :language :parsing]
+[1:35:13][Make next_token() try and set the sym using get_sym() before checking that it successfully got a sym][:asm :language :parsing]
+[1:37:23][Narrow down our test cases in asm_test()][:asm :language :parsing :programming :run]
+[1:39:29][Fix scan_str() to skip the '`'][:asm :language :parsing]
+[1:40:07][:Run it to see that it works][:asm :language :parsing]
+[1:40:25][Test macro expansion in asm_test()][:asm :language :parsing]
+[1:40:41][:Run it doing macro expansion, and hit our assertion in pop_token_list()][:asm :language :parsing]
+[1:41:52][Make init_pass() and lex_test() call init_scan()][:asm :language :parsing]
+[1:42:48][Step through push_token_list() to see that it all works][:asm :language :parsing :run]
+[1:43:46][Add a more complex macro expansion test to asm_test()][:asm :language :parsing :run]
+[1:44:47][:Run it and again hit our assertion in pop_token_list()][:asm :language :parsing]
+[1:46:30][Try renaming that test macro from `x4_plus_4 to asdf][:asm :language :parsing]
+[1:46:43][:Run it and hit our assertion in pop_token_list()][:asm :language :parsing]
+[1:47:51][Fix our asdf macro to `asdf in asm_test()][:asm :language :parsing]
+[1:47:58][:Run it and hit our pop_token_list() assertion on the `GETCHAR macro][:asm :language :parsing]
+[1:48:29][Narrow down our test cases in asm_test()][:asm :language :parsing :programming :run]
+[1:48:50][:Run it to see that it actually works][:asm :language :parsing]
+[1:49:09][Rename that `asdf macro back to `x1_plus_4][:asm :language :parsing]
+[1:49:28][:Run it to find that this works][:asm :language :parsing]
+[1:49:42][Uncomment the `GETCHAR macro definition in asm_test()][:asm :language :parsing]
+[1:49:56][:Run it and hit our pop_token_list() assertion on that `GETCHAR definition][:asm :language :parsing]
+[1:50:38][Try flipping the order of the `x1_plus_4 and `GETCHAR macros][:asm :language :parsing]
+[1:51:00][:Run it, hit our pop_token_list() assertion and consider that it's the second macro definition that asserts][:asm :language :parsing]
+[1:52:17][Make init_scan() 0-initialise the token_list_stack and rename next_unexpanded_token() to next_raw_token()][:asm :language :parsing]
+[1:59:32][Undo the buggy asm_test()][:asm :language :parsing]
+[1:59:56][:Run it to see that it's fine][:asm :language :parsing]
+[2:00:21][Reflect on our macro expansion with a glimpse into the future of parameterised macros and the determination to fix the bug off-stream][:asm :language :parsing :speech]
+[2:03:36][That's it for today's stream][:speech]
+[/video]