BeeEngine/glslang-zig
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

1) Allow '\' before a non-newline as a token in the preprocessor, and 2) localize line-continuation to just the pp scanner.

Browse source 
git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24530 e7fa87d3-cd2b-0410-9028-fcbf551c1848
This commit is contained in:
John Kessenich 2013-12-16 23:58:15 +00:00
parent 27151efa71
commit bd95819123
10 changed files with 245 additions and 78 deletions
Download patch file Download diff file Expand all files Collapse all files

19
glslang/MachineIndependent/preprocessor/PpScanner.cpp
View file

@ -281,20 +281,29 @@ int TPpContext::sourceScan(TPpContext* pp, InputSrc*, TPpToken* ppToken)
case 'k': case 'l': case 'm': case 'n': case 'o':
case 'p': case 'q': case 'r': case 's': case 't':
case 'u': case 'v': case 'w': case 'x': case 'y':
case 'z': case '\\' :
case 'z': case '\\':
do {
if (ch == '\\') {
// escaped character
pp->parseContext.lineContinuationCheck(ppToken->loc, false);
ch = pp->currentInput->getch(pp, pp->currentInput, ppToken);
if (ch == '\r' || ch == '\n') {
pp->parseContext.lineContinuationCheck(ppToken->loc, false);
int nextch = pp->currentInput->getch(pp, pp->currentInput, ppToken);
if (ch == '\r' && nextch == '\n')
ch = pp->currentInput->getch(pp, pp->currentInput, ppToken);
else
ch = nextch;
} else
pp->parseContext.error(ppToken->loc, "can only escape newlines", "\\", "");
} else {
// Not an escaped newline.
// Put back whatever it was
pp->currentInput->ungetch(pp, pp->currentInput, ch, ppToken);
// If not in the middle of an identifier, the \ is our token
if (len == 0)
return '\\';
// Otherwise, put back the \ character, leave it for the next call
ch = '\\'; // for the upcoming unget(...ch...);
break;
}
} else if (len < TPpToken::maxTokenLength) {
tokenText[len++] = ch;
ch = pp->currentInput->getch(pp, pp->currentInput, ppToken);
@ -303,7 +312,7 @@ int TPpContext::sourceScan(TPpContext* pp, InputSrc*, TPpToken* ppToken)
pp->parseContext.error(ppToken->loc, "name too long", "", "");
AlreadyComplained = 1;
}
ch = pp->currentInput->getch(pp, pp->currentInput, ppToken);
ch = pp->currentInput->getch(pp, pp->currentInput, ppToken);
}
} while ((ch >= 'a' && ch <= 'z') ||
(ch >= 'A' && ch <= 'Z') ||