Coverage for src/lib.mys : 100%
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1class TracebackEntry:
2 """A traceback entry with file path, line number, function and source
3 code.
5 """
7 path: string
8 line_number: i64
9 function: string
10 source_code: string
12class Traceback:
13 """A traceback.
15 """
17 stack: [TracebackEntry]
19 func __str__(self) -> string:
20 lines = ["Traceback (most recent call last):"]
22 for entry in self.stack:
23 lines.append(f" File: \"{entry.path}\", line {entry.line_number} "
24 f"in {entry.function}")
25 lines.append(f" {entry.source_code}")
27 return "\n".join(lines)
29func traceback() -> Traceback:
30 """Returns the current traceback.
32 """
34 stack: [TracebackEntry] = []
35 path: string? = None
36 line_number: i64 = -1
37 function: string? = None
38 source_code: string? = None
40 c"""
41 #if defined(MYS_TRACEBACK)
43 mys::TracebackEntry *item_p;
44 mys::TracebackEntryInfo *entry_info_p;
46 item_p = mys::traceback_bottom_p->next_p;
48 while (item_p != mys::traceback_top_p) {
49 path = String(item_p->info_p->path_p);
50 entry_info_p = &item_p->info_p->entries_info_p[item_p->index];
51 line_number = entry_info_p->line_number;
52 function = String(entry_info_p->name_p);
53 source_code = String(entry_info_p->code_p);
54 """
56 stack.append(TracebackEntry(path, line_number, function, source_code))
58 c"""
59 item_p = item_p->next_p;
60 }
62 #endif
63 """
65 return Traceback(stack)
67test traceback():
68 tb = traceback()
70 assert tb.stack.length() == 1
72 entry = tb.stack[0]
73 assert entry.path == "./src/lib.mys"
74 assert entry.line_number == 68
75 assert entry.function == "traceback"
76 assert entry.source_code == "tb = traceback()"
78 assert str(tb) == (
79 "Traceback (most recent call last):\n"
80 " File: \"./src/lib.mys\", line 68 in traceback\n"
81 " tb = traceback()")