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std.string.detab_alias_fix

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make detab and detabber accept custom types with an alias this to a string
member of member function

rainers improvment

more rainer fixes and more testing

more rainer
This commit is contained in:
Robert burner Schadek 2015-10-08 11:40:20 +02:00 • committed by Robert burner Schadek
parent 8d9d606ef8
commit ca724eb0f0
1 changed files with 78 additions and 8 deletions
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86
std/string.d
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@ -3857,16 +3857,50 @@ unittest
Returns: Returns:
GC allocated string with tabs replaced with spaces GC allocated string with tabs replaced with spaces
+/ +/
S detab(S)(S s, size_t tabSize = 8) pure auto detab(Range)(auto ref Range s, size_t tabSize = 8) pure
if (isSomeString!S) if ((isForwardRange!Range && isSomeChar!(ElementEncodingType!Range))
|| __traits(compiles, StringTypeOf!Range))
{ {
import std.array; import std.array;
return detabber(s, tabSize).array; return detabber(s, tabSize).array;
} }
///
@trusted pure unittest
{
import std.array;
assert(detab(" \n\tx", 9) == " \n x");
}
unittest
{
static struct TestStruct
{
string s;
alias s this;
}
static struct TestStruct2
{
string s;
alias s this;
@disable this(this);
}
string s = " \n\tx";
string cmp = " \n x";
auto t = TestStruct(s);
assert(detab(t, 9) == cmp);
assert(detab(TestStruct(s), 9) == cmp);
assert(detab(TestStruct(s), 9) == detab(TestStruct(s), 9));
assert(detab(TestStruct2(s), 9) == detab(TestStruct2(s), 9));
assert(detab(TestStruct2(s), 9) == cmp);
}
/++ /++
Replace each tab character in $(D r) with the number of spaces necessary Replace each tab character in $(D r) with the number of spaces
to align the following character at the next tab stop. necessary to align the following character at the next tab stop.
Params: Params:
r = string or forward range r = string or forward range
@ -3882,7 +3916,8 @@ auto detabber(Range)(Range r, size_t tabSize = 8)
import std.utf : codeUnitLimit, decodeFront; import std.utf : codeUnitLimit, decodeFront;
assert(tabSize > 0); assert(tabSize > 0);
alias C = Unqual!(ElementEncodingType!Range);
alias C = Unqual!(ElementEncodingType!(Range));
static struct Result static struct Result
{ {
@ -3901,7 +3936,7 @@ auto detabber(Range)(Range r, size_t tabSize = 8)
_tabSize = tabSize; _tabSize = tabSize;
} }
static if (isInfinite!Range) static if (isInfinite!(Range))
{ {
enum bool empty = false; enum bool empty = false;
} }
@ -3917,7 +3952,7 @@ auto detabber(Range)(Range r, size_t tabSize = 8)
{ {
if (nspaces) if (nspaces)
return ' '; return ' ';
static if (isSomeString!Range) static if (isSomeString!(Range))
C c = _input[0]; C c = _input[0];
else else
C c = _input.front; C c = _input.front;
@ -3965,7 +4000,7 @@ auto detabber(Range)(Range r, size_t tabSize = 8)
--nspaces; --nspaces;
if (!nspaces) if (!nspaces)
{ {
static if (isSomeString!Range) static if (isSomeString!(Range))
_input = _input[1 .. $]; _input = _input[1 .. $];
else else
_input.popFront(); _input.popFront();
@ -3984,6 +4019,14 @@ auto detabber(Range)(Range r, size_t tabSize = 8)
return Result(r, tabSize); return Result(r, tabSize);
} }
///
auto detabber(Range)(auto ref Range s, size_t tabSize = 8) pure
if (!(isForwardRange!Range && isSomeChar!(ElementEncodingType!Range))
&& is(StringTypeOf!Range))
{
return detabber(cast(StringTypeOf!Range)s, tabSize);
}
/// ///
@trusted pure unittest @trusted pure unittest
{ {
@ -3992,6 +4035,33 @@ auto detabber(Range)(Range r, size_t tabSize = 8)
assert(detabber(" \n\tx", 9).array == " \n x"); assert(detabber(" \n\tx", 9).array == " \n x");
} }
unittest
{
import std.array : array;
static struct TestStruct
{
string s;
alias s this;
}
static struct TestStruct2
{
string s;
alias s this;
@disable this(this);
}
string s = " \n\tx";
string cmp = " \n x";
auto t = TestStruct(s);
assert(detabber(t, 9).array == cmp);
assert(detabber(TestStruct(s), 9).array == cmp);
assert(detabber(TestStruct(s), 9).array == detab(TestStruct(s), 9));
assert(detabber(TestStruct2(s), 9).array == detab(TestStruct2(s), 9));
assert(detabber(TestStruct2(s), 9).array == cmp);
}
@trusted pure unittest @trusted pure unittest
{ {
import std.conv : to; import std.conv : to;