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parseNoGC can work with code points directly.

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This commit is contained in:
Ferdinand Majerech 2014-07-29 01:55:43 +02:00
parent 6e1239fdac
commit cac25207f1
1 changed files with 10 additions and 5 deletions
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15
source/dyaml/nogcutil.d
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@ -24,7 +24,7 @@ import std.range;
Target parseNoGC(Target, Source)(ref Source s, uint radix, out bool overflow) Target parseNoGC(Target, Source)(ref Source s, uint radix, out bool overflow)
@safe pure nothrow @nogc @safe pure nothrow @nogc
if (isSomeChar!(ElementType!Source) && if (isSomeChar!(ElementType!Source) &&
isIntegral!Target && !is(Target == enum)) isIntegral!Target && !is(Target == enum))
in { assert(radix >= 2 && radix <= 36); } in { assert(radix >= 2 && radix <= 36); }
body body
{ {
@ -33,10 +33,15 @@ body
Target v = 0; Target v = 0;
size_t atStart = true; size_t atStart = true;
for (; !s.empty; s.popFront()) // We can safely foreach over individual code points.
// Even with UTF-8 any digit is ASCII and anything not ASCII (such as the start of
// a UTF-8 sequence) is not a digit.
foreach(i; 0 .. s.length)
{ {
uint c = s.front; dchar c = s[i];
if (c < '0') // We can just take a char instead of decoding because anything non-ASCII is not
// going to be a decodable digit, i.e. we will end at such a byte.
if (c < '0' || c >= 0x80)
break; break;
if (radix < 10) if (radix < 10)
{ {
@ -67,7 +72,7 @@ body
/// Buils a message to a buffer similarly to writef/writefln, but without /// Buils a message to a buffer similarly to writef/writefln, but without
/// using GC. /// using GC.
/// ///
/// C snprintf would be better, but it isn't pure. /// C snprintf would be better, but it isn't pure.
/// formattedWrite isn't completely @nogc yet (although it isn't GC-heavy). /// formattedWrite isn't completely @nogc yet (although it isn't GC-heavy).