Parameterized Macros
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0:08Recap and set the stage for the day with a mention of the bug fix from last stream
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0:08Recap and set the stage for the day with a mention of the bug fix from last stream
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0:08Recap and set the stage for the day with a mention of the bug fix from last stream
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0:52Review our current macro expansion support, including the new '$' macro identifier
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0:52Review our current macro expansion support, including the new '$' macro identifier
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0:52Review our current macro expansion support, including the new '$' macro identifier
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4:11Review the removal of anonymous labels
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4:11Review the removal of anonymous labels
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4:11Review the removal of anonymous labels
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5:11Parameterized macros
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5:11Parameterized macros
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5:11Parameterized macros
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8:02The plan for parameterized macros
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8:02The plan for parameterized macros
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8:02The plan for parameterized macros
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12:02Implement multi-line macros, introducing cmd_macro() and cmd_endmacro()
12:02Implement multi-line macros, introducing cmd_macro() and cmd_endmacro()
12:02Implement multi-line macros, introducing cmd_macro() and cmd_endmacro()
15:42Add a multi-line macro test in asm_test() and fix cmd_macro() to skip the closing token
15:42Add a multi-line macro test in asm_test() and fix cmd_macro() to skip the closing token
15:42Add a multi-line macro test in asm_test() and fix cmd_macro() to skip the closing token
16:35Run it to see that it works
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16:35Run it to see that it works
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16:35Run it to see that it works
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17:04Setup to implement parameterized macros, similar to Ion
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17:04Setup to implement parameterized macros, similar to Ion
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17:04Setup to implement parameterized macros, similar to Ion
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18:35Dive into parameterized macros, augmenting the Assembler with local_syms for get_sym() to use
18:35Dive into parameterized macros, augmenting the Assembler with local_syms for get_sym() to use
18:35Dive into parameterized macros, augmenting the Assembler with local_syms for get_sym() to use
21:10Run it to see that nothing broke
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21:10Run it to see that nothing broke
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21:10Run it to see that nothing broke
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21:26Introduce push_sym() to handle our macro parameters
21:26Introduce push_sym() to handle our macro parameters
21:26Introduce push_sym() to handle our macro parameters
26:25Run it to make sure it still works
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26:25Run it to make sure it still works
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26:25Run it to make sure it still works
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26:34Augment Assembler with a temp_tokens array, and introduce parse_macro_param() to handle our macro parameters
26:34Augment Assembler with a temp_tokens array, and introduce parse_macro_param() to handle our macro parameters
26:34Augment Assembler with a temp_tokens array, and introduce parse_macro_param() to handle our macro parameters
35:08Enable pop_token_list() to pop our temp_tokens stack
35:08Enable pop_token_list() to pop our temp_tokens stack
35:08Enable pop_token_list() to pop our temp_tokens stack
38:53Run it and crash in get_sym()
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38:53Run it and crash in get_sym()
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38:53Run it and crash in get_sym()
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39:07Make init_assembler() reset the local_syms and temp_tokens
39:07Make init_assembler() reset the local_syms and temp_tokens
39:07Make init_assembler() reset the local_syms and temp_tokens
39:28Run it to see that it works
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39:28Run it to see that it works
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39:28Run it to see that it works
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39:44Enable cmd_macro() to handle newlines
39:44Enable cmd_macro() to handle newlines
39:44Enable cmd_macro() to handle newlines
43:52Run it to see that we didn't break anything
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43:52Run it to see that we didn't break anything
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43:52Run it to see that we didn't break anything
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44:24Add a parameterized macro test in asm_test()
44:24Add a parameterized macro test in asm_test()
44:24Add a parameterized macro test in asm_test()
45:08Step in to next_token() to see how it handles our parameterized macro
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45:08Step in to next_token() to see how it handles our parameterized macro
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45:08Step in to next_token() to see how it handles our parameterized macro
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46:11Fix next_token() to skip past the '$' token
46:11Fix next_token() to skip past the '$' token
46:11Fix next_token() to skip past the '$' token
47:29Run it to see that parse_macro_param() correctly parses a parameter
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47:29Run it to see that parse_macro_param() correctly parses a parameter
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47:29Run it to see that parse_macro_param() correctly parses a parameter
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48:14Step through to the next macro, to see how $reg gets handled
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48:14Step through to the next macro, to see how $reg gets handled
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48:14Step through to the next macro, to see how $reg gets handled
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49:21Rename the getchar macro in asm_test() to do_getchar
49:21Rename the getchar macro in asm_test() to do_getchar
49:21Rename the getchar macro in asm_test() to do_getchar
49:41Run it to see that it seems to work
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49:41Run it to see that it seems to work
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49:41Run it to see that it seems to work
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50:04Torture test macro parameter pre-expansion
50:04Torture test macro parameter pre-expansion
50:04Torture test macro parameter pre-expansion
50:39Run it to see that it does work
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50:39Run it to see that it does work
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50:39Run it to see that it does work
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50:42Continue the torture test of macro parameter expansion
50:42Continue the torture test of macro parameter expansion
50:42Continue the torture test of macro parameter expansion
52:04Run it to see that it works
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52:04Run it to see that it works
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52:04Run it to see that it works
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52:24Test macro parameter scoping
52:24Test macro parameter scoping
52:24Test macro parameter scoping
52:41Run it and do not receive the expected error
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52:41Run it and do not receive the expected error
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52:41Run it and do not receive the expected error
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52:53Augment the TokenList with saved_local_syms for next_token() to use and prevent parameters from leaking out of macros
52:53Augment the TokenList with saved_local_syms for next_token() to use and prevent parameters from leaking out of macros
52:53Augment the TokenList with saved_local_syms for next_token() to use and prevent parameters from leaking out of macros
54:34Run it to see that our scoped parameter was properly destroyed, as evidenced by a "No macro or macro parameter named 'arg1'" error
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54:34Run it to see that our scoped parameter was properly destroyed, as evidenced by a "No macro or macro parameter named 'arg1'" error
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54:34Run it to see that our scoped parameter was properly destroyed, as evidenced by a "No macro or macro parameter named 'arg1'" error
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54:43Comment out our error-causing macro
54:43Comment out our error-causing macro
54:43Comment out our error-causing macro
54:48Run it to see that it works
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54:48Run it to see that it works
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54:48Run it to see that it works
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54:56Test macro recursion
54:56Test macro recursion
54:56Test macro recursion
55:11Run it and hit a "Temp tokens stack overflow" error
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55:11Run it and hit a "Temp tokens stack overflow" error
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55:11Run it and hit a "Temp tokens stack overflow" error
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55:44A few words on the utility of this infinite macro recursion
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55:44A few words on the utility of this infinite macro recursion
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55:44A few words on the utility of this infinite macro recursion
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56:29Test macro argument shadowing
56:29Test macro argument shadowing
56:29Test macro argument shadowing
57:18Run it to see that the arguments were not outputted in the reverse order
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57:18Run it to see that the arguments were not outputted in the reverse order
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57:18Run it to see that the arguments were not outputted in the reverse order
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59:10Step in to next_token() to see what it does with our shadowed arguments
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59:10Step in to next_token() to see what it does with our shadowed arguments
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59:10Step in to next_token() to see what it does with our shadowed arguments
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1:05:12Fix next_token() to call parse_macro_param() and evaluate the macro parameters before establishing the binding
1:05:12Fix next_token() to call parse_macro_param() and evaluate the macro parameters before establishing the binding
1:05:12Fix next_token() to call parse_macro_param() and evaluate the macro parameters before establishing the binding
1:13:16Run it to see that it does the right thing
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1:13:16Run it to see that it does the right thing
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1:13:16Run it to see that it does the right thing
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1:13:46Read back through next_token()
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1:13:46Read back through next_token()
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1:13:46Read back through next_token()
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1:14:26Make next_token() set saved_local_syms after all the parse_macro_arg() calls
1:14:26Make next_token() set saved_local_syms after all the parse_macro_arg() calls
1:14:26Make next_token() set saved_local_syms after all the parse_macro_arg() calls
1:15:13Run it to see that it's okay
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1:15:13Run it to see that it's okay
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1:15:13Run it to see that it's okay
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1:15:39Q&A
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1:15:39Q&A
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1:15:39Q&A
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1:16:09Consider the potential similarity of our assembler to lisp interpreters for symbolic languages
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1:16:09Consider the potential similarity of our assembler to lisp interpreters for symbolic languages
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1:16:09Consider the potential similarity of our assembler to lisp interpreters for symbolic languages
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1:17:13That's pretty much it for parameterized macros, with a glimpse into the future of doing expression evaluation
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1:17:13That's pretty much it for parameterized macros, with a glimpse into the future of doing expression evaluation
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1:17:13That's pretty much it for parameterized macros, with a glimpse into the future of doing expression evaluation
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