Mercurial > jwe > qt-gui-with-push-parser
annotate tty-main.cpp @ 1:08df60a01bc1
debug flag, handle input with signal
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Mon, 20 May 2019 13:45:58 -0400 |
| parents | dff751fb985c |
| children | 0e154787183d |
| rev | line source |
|---|---|
| 0 | 1 #include <iostream> |
| 2 #include <string> | |
| 3 | |
| 4 #include <cstdio> | |
| 5 #include <cstdlib> | |
| 6 | |
| 7 #include <readline/readline.h> | |
| 8 #include <readline/history.h> | |
| 9 | |
| 10 #include "gui-main.h" | |
| 11 #include "tty-main.h" | |
| 12 | |
| 13 #include "parse.h" | |
| 14 | |
| 15 namespace tty | |
| 16 { | |
| 17 int main (int, char **) | |
| 18 { | |
| 19 std::cout | |
| 20 << "Example Calculator.\n" | |
| 21 << "Available operations: + - * / ^ ()\n" | |
| 22 << "Semicolon terminates statement.\n" | |
| 23 << "GNU Readline available for history editing.\n" << std::endl; | |
| 24 | |
| 25 interpreter::parser_init (); | |
| 26 | |
| 27 for (;;) | |
| 28 { | |
| 29 char *tmp = readline (interpreter::beg_of_stmt ? ">> " : ""); | |
| 30 | |
| 31 if (! tmp) | |
| 32 break; | |
| 33 | |
| 34 if (*tmp) | |
| 35 { | |
| 36 add_history (tmp); | |
| 37 using_history (); | |
| 38 } | |
| 39 | |
| 40 std::string line = tmp; | |
| 41 | |
| 42 free (tmp); | |
| 43 | |
| 44 int status = interpreter::parse_and_execute (line); | |
| 45 | |
| 46 if (status < 0) | |
| 47 break; | |
| 48 } | |
| 49 | |
| 50 interpreter::parser_fini (); | |
| 51 | |
| 52 return 0; | |
| 53 } | |
| 54 | |
| 55 void emit_result (double value) | |
| 56 { | |
| 57 std::cout << "ans = " << value << std::endl; | |
| 58 } | |
|
1
08df60a01bc1
debug flag, handle input with signal
John W. Eaton <jwe@octave.org>
parents:
0
diff
changeset
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59 |
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08df60a01bc1
debug flag, handle input with signal
John W. Eaton <jwe@octave.org>
parents:
0
diff
changeset
|
60 void emit_error (const char *msg) |
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08df60a01bc1
debug flag, handle input with signal
John W. Eaton <jwe@octave.org>
parents:
0
diff
changeset
|
61 { |
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08df60a01bc1
debug flag, handle input with signal
John W. Eaton <jwe@octave.org>
parents:
0
diff
changeset
|
62 std::cerr << "parse error: " << msg << std::endl; |
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08df60a01bc1
debug flag, handle input with signal
John W. Eaton <jwe@octave.org>
parents:
0
diff
changeset
|
63 } |
| 0 | 64 } |