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Lexer

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- Factored out an invariant.
This commit is contained in:
Paul Beckingham 2014-06-09 18:02:34 -04:00
parent 05d4ac16a3
commit 11a4c58735
1 changed files with 12 additions and 9 deletions
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21
src/Lexer.cpp
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@ -93,18 +93,20 @@ bool Lexer::token (std::string& result, Type& type)
else if (is_dec_digit (_n0))
{
// Speculatively try a date and duration parse. Longest wins.
int offset = (_i < 4 ? 0 : _i - 4);
std::string::size_type iso_i = 0;
std::string iso_result;
ISO8601d iso;
iso.ambiguity (_ambiguity);
if (iso.parse (_input.substr (_i < 4 ? 0 : _i - 4), iso_i))
iso_result = _input.substr ((_i < 4 ? 0 : _i - 4), iso_i);
if (iso.parse (_input.substr (offset), iso_i))
iso_result = _input.substr (offset, iso_i);
std::string::size_type dur_i = 0;
std::string dur_result;
Duration dur;
if (dur.parse (_input.substr (_i < 4 ? 0 : _i - 4), dur_i))
dur_result = _input.substr ((_i < 4 ? 0 : _i - 4), dur_i);
if (dur.parse (_input.substr (offset), dur_i))
dur_result = _input.substr (offset, dur_i);
if (iso_result.length () > dur_result.length ())
{
@ -188,18 +190,19 @@ bool Lexer::token (std::string& result, Type& type)
}
else if (is_ident_start (_n0))
{
// Speculatively try a date and duration parse. Longest wins.
int offset = (_i < 4 ? 0 : _i - 4);
std::string::size_type iso_i = 0;
std::string iso_result;
ISO8601p iso;
if (iso.parse (_input.substr (_i < 4 ? 0 : _i - 4), iso_i))
iso_result = _input.substr ((_i < 4 ? 0 : _i - 4), iso_i);
if (iso.parse (_input.substr (offset), iso_i))
iso_result = _input.substr (offset, iso_i);
std::string::size_type dur_i = 0;
std::string dur_result;
Duration dur;
if (dur.parse (_input.substr (_i < 4 ? 0 : _i - 4), dur_i))
dur_result = _input.substr ((_i < 4 ? 0 : _i - 4), dur_i);
if (dur.parse (_input.substr (offset), dur_i))
dur_result = _input.substr (offset, dur_i);
if (iso_result.length () > dur_result.length ())
{