}
public SetDescriptor getSet() {
+ if (vd==null)
+ return null;
return vd.getSet();
}
public VarExpr(VarDescriptor vd) {
this.vd=vd;
varname=vd.getSymbol();
- this.td = vd.getType();
+ this.td = vd.getType();
}
public String name() {
}
public Set getRequiredDescriptors() {
- return new HashSet();
+ Set s=new HashSet();
+ s.add(vd);
+ return s;
+
}
-
+
public VarDescriptor getVar() {
return vd;
}
Set s=new HashSet();
s.add(this);
return s;
- } else
+ } else
return new HashSet();
}
public void generate(CodeWriter writer, VarDescriptor dest) {
- // #TBD#: bit of a hack, really should have been type checked properly
+ // #TBD#: bit of a hack, really should have been type checked properly
assert vd != null;
assert vd.getType() != null;
this.td = vd.getType();
if (writer.getInvariantValue()!=null&&
writer.getInvariantValue().isInvariant(this)) {
+ writer.addDeclaration(vd.getType().getGenerateType().getSafeSymbol(),dest.getSafeSymbol());
+ writer.outputline(dest.getSafeSymbol()+"="+writer.getInvariantValue().getValue(this).getSafeSymbol()+";");
writer.outputline("maybe="+writer.getInvariantValue().getMaybe(this).getSafeSymbol()+";");
- writer.outputline(vd.getType().getGenerateType().getSafeSymbol()+
- " "+dest.getSafeSymbol()+"="+writer.getInvariantValue().getValue(this).getSafeSymbol()+";");
return;
}
- writer.outputline(vd.getType().getGenerateType().getSafeSymbol() + " " + dest.getSafeSymbol() +
- " = (" + vd.getType().getGenerateType().getSafeSymbol() + ") " + vd.getSafeSymbol() + "; //varexpr");
+ writer.addDeclaration(vd.getType().getGenerateType().getSafeSymbol(),dest.getSafeSymbol());
+ writer.outputline(dest.getSafeSymbol() +
+ " = (" + vd.getType().getGenerateType().getSafeSymbol() + ") " + vd.getSafeSymbol() + "; /*varexpr*/");
if (vd.isGlobal() && (DOTYPECHECKS||DOMEMCHECKS) && (td instanceof StructureTypeDescriptor)) {
VarDescriptor typevar=VarDescriptor.makeNew("typechecks");
writer.outputline("if ("+dest.getSafeSymbol()+")");
writer.startblock();
- if (DOTYPECHECKS)
- writer.outputline("bool "+typevar.getSafeSymbol()+"=assertvalidtype(" + dest.getSafeSymbol() + ", " + td.getId() + ");");
- else
- writer.outputline("bool "+typevar.getSafeSymbol()+"=assertvalidmemory(" + dest.getSafeSymbol() + ", " + td.getId() + ");");
+ if (DOTYPECHECKS) {
+ writer.addDeclaration("bool",typevar.getSafeSymbol());
+ writer.outputline(typevar.getSafeSymbol()+"=assertvalidtype(" + dest.getSafeSymbol() + ", " + td.getId() + ");");
+ } else {
+ writer.addDeclaration("bool",typevar.getSafeSymbol());
+ writer.outputline(typevar.getSafeSymbol()+"=assertvalidmemory(" + dest.getSafeSymbol() + ", " + td.getId() + ");");
+ }
writer.outputline("if (!"+typevar.getSafeSymbol()+")");
writer.startblock();
writer.outputline(dest.getSafeSymbol()+"=0;");
public TypeDescriptor typecheck(SemanticAnalyzer sa) {
typechecked = true;
vd = (VarDescriptor) sa.getSymbolTable().get(varname);
-
if (vd == null) {
//System.out.println(varname);
sa.getErrorReporter().report(null, "Undefined variable '" + varname + "'");
return null;
}
-
assert vd.getType() != null;
-
this.td = vd.getType();
return this.td;
}
-
}