Future/bison
1
0
Fork 0
mirror of https://git.savannah.gnu.org/git/bison.git synced 2026-03-09 12:23:04 +00:00
Code Issues Packages Projects Releases Wiki Activity

d: examples: calc: use of std.conv.parse for location

Browse Source 
From Dlang v2.095.0 onwards, std.conv.parse reports the number of
consumed characters.

* examples/d/calc/calc.y: Here.
This commit is contained in:
Adela Vais
2021-01-02 23:38:30 +02:00
committed by Akim Demaille
parent d53bbd5f06
commit cd99a1a923
1 changed files with 20 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
examples/d/calc/calc.y
View File

@@ -129,14 +129,28 @@ if (isInputRange!R && is(ElementType!R : dchar))
if (input.front.isNumber)
{
int lenChars = 0;
import std.compiler : version_minor;
static if (version_minor >= 95)
{
// from Dlang v2.095.0 onwards std.conv.parse reports
// the number of consumed characters
import std.typecons : Flag, Yes;
import std.conv : parse;
auto parsed = parse!(int, R, Yes.doCount)(input);
value_.ival = parsed.data;
lenChars = cast(int) parsed.count;
}
else
{
auto copy = input;
import std.conv : parse;
value_.ival = input.parse!int;
value.ival = input.parse!int;
while (!input.empty && copy.front != input.front)
{
lenChars++;
copy.popFront;
}
}
location.begin = location.end;
location.end.column += lenChars;
return Symbol(TokenKind.NUM, value_.ival, location);