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Add index ranges

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Builtin 'set' now can set variable index ranges:
  set test[1..3] a b c #works
  set test[-1..-3] a b c #works if variable have enough elements
  set test[2..-2]  a b c #works
  set test[1..3 -1..-2] a b c b b #works

Expand now can parse index ranges. But not handle for now.

TODO:
  * Add variable substitution index ranges: echo $PATH[-1..1]
  * Add command substitution index range: echo (seq 10)[-1..-4]
  * Add process substitution indexes and ranges: echo %vim[-1]
This commit is contained in:
maxfl
2012-07-07 10:57:28 +08:00
parent b23d65b014
commit 0a5e7be129
2 changed files with 44 additions and 5 deletions
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19
expand.cpp
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@@ -759,8 +759,25 @@ static int parse_slice( const wchar_t *in, wchar_t **end_ptr, std::vector<long>
}
// debug( 0, L"Push idx %d", tmp );
idx.push_back(tmp);
pos = end-in;
if ( in[pos]==L'.' && in[pos+1]==L'.' ){
pos+=2;
long tmp1 = wcstol( &in[pos], &end, 10 );
if( ( errno ) || ( end == &in[pos] ) )
{
return 1;
}
pos = end-in;
debug( 0, L"Push range idx %d %d", tmp, tmp1 );
idx.push_back(tmp);
// idx.push_back(tmp2);
continue;
}
debug( 0, L"Push idx %d", tmp );
idx.push_back(tmp);
// idx.push_back(tmp2);
}
if( end_ptr )