@Override
public void compile(CodeFragment result, ASTNode node, CompilerEngine engine)
throws CompilerException {
System.out.println("called, father is " + node.getParent());
try {
LetRuleNode letrule = (LetRuleNode) node;
Map<String, ASTNode> letmap = letrule.getVariableMap();
result.appendLine("//start of let\n");
result.appendLine("localStack.pushLayer();\n");
for (Entry<String, ASTNode> entry : letmap.entrySet()) {
CodeFragment val = engine.compile(entry.getValue(), CodeType.R);
result.appendFragment(val);
result.appendLine("localStack.put(\"" + entry.getKey() + "\", evalStack.pop());\n");
}
result.appendFragment(engine.compile(letrule.getInRule(), CodeType.U));
result.appendLine("localStack.popLayer();\n");
result.appendLine("//end of let\n");
} catch (Exception e) {
throw new CompilerException(e);
}
}
@Override
public void compile(CodeFragment result, ASTNode node, CompilerEngine engine)
throws CompilerException {
// set comprehension was changed in a newer update of CoreASM.
// there are no longer two different set comprehension node types
// evaluates a set comprehension of the form
// {id | id in value with guard}
// {id is exp | id1 in value1, ... idn in value n with guard}
// where the guard is optional.
// in the first case, the exp is simply id
SetCompNode cnode = (SetCompNode) node;
// guard might be non existent, so initialize it
CodeFragment guard = null;
// optimization: the true guard is always true anyway, so if it is existent, leave it out
if (!(cnode.getGuard() instanceof TrueGuardNode))
guard = engine.compile(cnode.getGuard(), CodeType.R);
List<String> constrnames = new ArrayList<String>();
result.appendLine(
"@decl(java.util.List<@[email protected]>,list)=new java.util.ArrayList<@[email protected]>();\n");
try {
// evaluate all constrainer domains and collect the list of variable names
int counter = 0;
for (Entry<String, ASTNode> e : cnode.getVarBindings().entrySet()) {
constrnames.add(e.getKey());
result.appendFragment(engine.compile(e.getValue(), CodeType.R));
result.appendLine(
"@decl(java.util.List<@[email protected]>,domain"
+ counter
+ ")=new java.util.ArrayList<@[email protected]>(((@[email protected])evalStack.pop()).enumerate());\n");
counter++;
}
// iterate
// open for loops
for (int i = 0; i < constrnames.size(); i++) {
String var = "@domain" + i + "@";
String cvar = "@c" + i + "@";
result.appendLine(
"for(@decl(int,c" + i + ")=0; " + cvar + " < " + var + ".size(); " + cvar + "++){\n");
}
result.appendLine("localStack.pushLayer();\n");
for (int i = 0; i < constrnames.size(); i++) {
result.appendLine(
"localStack.put(\""
+ constrnames.get(i)
+ "\", @domain"
+ i
+ "@.get(@c"
+ i
+ "@));\n");
}
if (guard == null) {
result.appendFragment(engine.compile(cnode.getSetFunction(), CodeType.R));
result.appendLine("@[email protected]((@[email protected])evalStack.pop());\n");
} else {
result.appendFragment(guard);
result.appendLine("if(evalStack.pop().equals(@[email protected])){\n");
result.appendFragment(engine.compile(cnode.getSetFunction(), CodeType.R));
result.appendLine("@[email protected]((@[email protected])evalStack.pop());\n");
result.appendLine("}\n");
}
result.appendLine("localStack.popLayer();\n");
// close for loops
for (int i = 0; i < constrnames.size(); i++) {
result.appendLine("}\n");
}
String setelement =
engine.getPath().getEntryName(LibraryEntryType.STATIC, "SetElement", "SetPlugin");
result.appendLine("evalStack.push(new " + setelement + "(@list@));\n");
} catch (EngineException exc) {
throw new CompilerException(exc);
}
}