1 Commits

Author SHA1 Message Date
Gašper Dobrovoljc
73e1113764 Skip right expression evaluation in OR if left returns true 2025-06-03 18:26:19 +02:00
3 changed files with 41 additions and 13 deletions

View File

@@ -1,2 +1,12 @@
//1234567890 fun putstr(s)
//12345678901
fun f1() =
putstr("funkcija 1\n\00"),
0
fun f2() =
putstr("funkcija 2\n\00"),
0
fun main() =
f1() || f2()

View File

@@ -227,13 +227,10 @@ public class CodeGen {
@Override @Override
public List<PDM.CodeInstr> visit(AST.BinExpr binExpr, Mem.Frame frame) { public List<PDM.CodeInstr> visit(AST.BinExpr binExpr, Mem.Frame frame) {
Report.Locatable loc = attrAST.attrLoc.get(binExpr); Report.Location loc = attrAST.attrLoc.get(binExpr).location();
List<PDM.CodeInstr> code = new ArrayList<>(); List<PDM.CodeInstr> code = new ArrayList<>();
code.addAll(binExpr.fstExpr.accept(this, frame));
code.addAll(binExpr.sndExpr.accept(this, frame));
PDM.OPER.Oper oper = switch (binExpr.oper) { PDM.OPER.Oper oper = switch (binExpr.oper) {
case OR -> PDM.OPER.Oper.OR; case OR -> PDM.OPER.Oper.OR;
case AND -> PDM.OPER.Oper.AND; case AND -> PDM.OPER.Oper.AND;
@@ -250,7 +247,34 @@ public class CodeGen {
case MOD -> PDM.OPER.Oper.MOD; case MOD -> PDM.OPER.Oper.MOD;
}; };
code.add(new PDM.OPER(oper, loc)); if (oper == PDM.OPER.Oper.OR) {
String locStr = loc.begLine() + ":" + loc.begColumn();
String rightLabel = "$or:right" + locStr;
String skipLabel = "$or:skip@" + locStr;
String endLabel = "$or:end@" + locStr;
code.addAll(binExpr.fstExpr.accept(this, frame));
code.add(new PDM.NAME(skipLabel, loc));
code.add(new PDM.NAME(rightLabel, loc));
code.add(new PDM.CJMP(loc));
code.add(new PDM.LABEL(rightLabel, loc));
code.add(new PDM.PUSH(0, loc));
code.addAll(binExpr.sndExpr.accept(this, frame));
code.add(new PDM.OPER(oper, loc));
code.add(new PDM.NAME(endLabel, loc));
code.add(new PDM.UJMP(loc));
code.add(new PDM.LABEL(skipLabel, loc));
code.add(new PDM.PUSH(1, loc));
code.add(new PDM.LABEL(endLabel, loc));
} else {
code.addAll(binExpr.fstExpr.accept(this, frame));
code.addAll(binExpr.sndExpr.accept(this, frame));
code.add(new PDM.OPER(oper, loc));
}
attrAST.attrCode.put(binExpr, code); attrAST.attrCode.put(binExpr, code);
return code; return code;

View File

@@ -246,14 +246,8 @@ public class LexAn implements AutoCloseable {
buffToken = new Token(start, Token.Symbol.DIV, "/"); buffToken = new Token(start, Token.Symbol.DIV, "/");
return; return;
} }
nextChar();
int length = 0;
while (buffChar != '\n' && buffChar != -1) { while (buffChar != '\n' && buffChar != -1) {
length++;
if (length > 10) {
throw new Report.Error(currentLocation(), "Comments can only be 10 characters long");
}
nextChar(); nextChar();
} }