#include "TPushLexer.hh"
#include "APushParser.hh"
-TPushLexer::TPushLexer(APushParser& p) : APushLexer(p)
+TPushLexer::TPushLexer(ALogger& l, APushParser& p) : APushLexer(l, p)
{
state = ACCEPT;
}
case ACCEPT:
if (ch == '\\') state = ESCAPE;
else if (ch == '#') state = PARAMETER;
- else if (ch == '\b') parser.push(TToken(TToken::GDELETE));
else if (ch == -1) ;
else transaction(ch, ACCEPT);
break;
buffer.push_back(ch);
state = MACRO;
}
- else if (ch == '\b')
- {
- state = ACCEPT;
- }
else if (ch == -1) error();
else
{
buffer.erase();
state = PARAMETER;
}
- else if (ch == '\b')
- {
- buffer.erase(buffer.length() - 1, 1);
- if (buffer.length() == 0) state = ESCAPE;
- }
else if (isalpha(ch))
buffer.push_back(ch);
else if (ch == -1)
if (ch == '\\') state = ESCAPE;
else if (ch == '#') state = PARAMETER;
else if (isspace(ch)) ;
- else if (ch == '\b') parser.push(TToken(TToken::GDELETE));
else if (ch == -1) state = ACCEPT;
else transaction(ch, ACCEPT);
break;
switch (state)
{
- case ESCAPE: parser.setCursor("\\"); break;
- case MACRO: parser.setCursor("\\" + buffer); break;
- case PARAMETER: parser.setCursor("#"); break;
- default: parser.setCursor("?"); break;
+ case ESCAPE: parser.setCursorHint("\\"); break;
+ case MACRO: parser.setCursorHint("\\" + buffer); break;
+ case PARAMETER: parser.setCursorHint("#"); break;
+ default: parser.setCursorHint(""); break;
+ }
+}
+
+void
+TPushLexer::drop(bool alt)
+{
+ std::string restore = "";
+
+ switch (state)
+ {
+ case ACCEPT:
+ case IGNORE_SPACE:
+ restore = parser.drop();
+ if (restore.length() > 0 && restore[0] == '\\')
+ {
+ buffer = std::string(restore, 1, restore.length() - 1);
+ state = (buffer.length() > 0) ? MACRO : ESCAPE;
+ }
+ break;
+ case ESCAPE:
+ state = ACCEPT;
+ break;
+ case MACRO:
+ if (alt) buffer.erase();
+ else buffer.erase(buffer.length() - 1, 1);
+ if (buffer.length() == 0) state = ESCAPE;
+ break;
+ case PARAMETER:
+ default:
+ assert(0);
+ break;
+ }
+
+ switch (state)
+ {
+ case ESCAPE: parser.setCursorHint("\\"); break;
+ case MACRO: parser.setCursorHint("\\" + buffer); break;
+ case PARAMETER: parser.setCursorHint("#"); break;
+ default: parser.setCursorHint(""); break;
}
}