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Fix Lexer::getLongString prefix pruning logic

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This fixes 3 bugs:
1/ only spaces are considered as part of the prefix
2/ leading tabs are removed unconditionally
3/ off-by-one error in the removal

The new intended behavior is:

1/ find the prefix (sequence of spaces and tabs) before the first
   line; remove this prefix from the line
2/ on the next lines, check whether they start with the same prefix,
  and if they do, strip this prefix
This commit is contained in:
Jean-Marc Lasgouttes 2017-08-23 12:25:29 +02:00
parent c5b8250604
commit 48f099d93a
1 changed files with 4 additions and 4 deletions
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8
src/Lexer.cpp
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@ -738,7 +738,7 @@ docstring Lexer::getLongString(docstring const & endtoken)
break; break;
if (firstline) { if (firstline) {
size_t i = tmpstr.find_first_not_of(char_type(' ')); size_t i = tmpstr.find_first_not_of(from_ascii(" \t"));
if (i != string::npos) if (i != string::npos)
prefix = tmpstr.substr(0, i); prefix = tmpstr.substr(0, i);
firstline = false; firstline = false;
@ -747,10 +747,10 @@ docstring Lexer::getLongString(docstring const & endtoken)
// further lines in long strings may have the same // further lines in long strings may have the same
// whitespace prefix as the first line. Remove it. // whitespace prefix as the first line. Remove it.
if (prefix.length() && prefixIs(tmpstr, prefix)) if (!prefix.empty() && prefixIs(tmpstr, prefix))
tmpstr.erase(0, prefix.length() - 1); tmpstr.erase(0, prefix.length());
str += ltrim(tmpstr, "\t") + '\n'; str += tmpstr + '\n';
} }
if (!pimpl_->is) if (!pimpl_->is)