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errors: Show error length with carets

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Use multiple carets to show the span of the error (up to the end of the
first line), rather than just a caret on the first character.
This commit is contained in:
James Westman 2024-07-26 22:35:04 -05:00
parent 2dcf0c154b
commit ea4c7245be
1 changed files with 12 additions and 2 deletions
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14
blueprintcompiler/errors.py
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@ -93,18 +93,28 @@ class CompileError(PrintableError):
assert self.range is not None
line_num, col_num = utils.idx_to_pos(self.range.start + 1, code)
end_line_num, end_col_num = utils.idx_to_pos(self.range.end + 1, code)
line = code.splitlines(True)[line_num] if code != "" else ""
# Display 1-based line numbers
line_num += 1
end_line_num += 1
removed_tabs = line.count("\t", 0, col_num - 1)
n_spaces = col_num - 1
n_carets = (
(end_col_num - col_num)
if line_num == end_line_num
else (len(line) - n_spaces - 1)
)
n_spaces += line.count("\t", 0, col_num)
n_carets += line.count("\t", col_num, col_num + n_carets)
line = line.replace("\t", " ")
stream.write(
f"""{self.color}{Colors.BOLD}{self.category}: {self.message}{Colors.CLEAR}
at {filename} line {line_num} column {col_num}:
{Colors.FAINT}{line_num :>4} |{Colors.CLEAR}{line.rstrip()}\n {Colors.FAINT}|{" "*(col_num-1+removed_tabs)}^{Colors.CLEAR}\n"""
{Colors.FAINT}{line_num :>4} |{Colors.CLEAR}{line.rstrip()}\n {Colors.FAINT}|{" "*n_spaces}{"^"*n_carets}{Colors.CLEAR}\n"""
)
for hint in self.hints: