private void checkVariable(Tree.Term term, Node node) {
if (isEffectivelyBaseMemberExpression(term)) { // Note: other cases handled in ExpressionVisitor
Tree.StaticMemberOrTypeExpression mte = (Tree.StaticMemberOrTypeExpression) term;
Declaration member = mte.getDeclaration();
if (member == declaration) {
if ((declaration.isFormal() || declaration.isDefault()) && !isForwardReferenceable()) {
term.addError(
"member is formal or default and may not be assigned here: '"
+ member.getName()
+ "'");
} else if (!isVariable() && !isLate()) {
if (member instanceof Value) {
if (node instanceof Tree.AssignOp) {
term.addError(
"value is not a variable and may not be assigned here: '"
+ member.getName()
+ "'",
803);
} else {
term.addError("value is not a variable: '" + member.getName() + "'", 800);
}
} else {
term.addError("not a variable value: '" + member.getName() + "'");
}
}
}
}
}
@Override
public void visit(Tree.SpecifierStatement that) {
Tree.Term term = that.getBaseMemberExpression();
boolean parameterized = false;
while (term instanceof Tree.ParameterizedExpression) {
Tree.ParameterizedExpression pe = (Tree.ParameterizedExpression) term;
term = pe.getPrimary();
parameterized = true;
}
if (term instanceof Tree.StaticMemberOrTypeExpression) {
Tree.StaticMemberOrTypeExpression bme = (Tree.StaticMemberOrTypeExpression) term;
// Declaration member = getTypedDeclaration(bme.getScope(),
// name(bme.getIdentifier()), null, false, bme.getUnit());
Declaration member = bme.getDeclaration();
if (member == declaration) {
if ((declaration.isFormal() || declaration.isDefault()) && !isForwardReferenceable()) {
// TODO: is this error correct?! look at the condition above
bme.addError(
"member is formal and may not be specified: '"
+ member.getName()
+ "' is declared formal");
}
if (that.getRefinement()) {
declare();
}
Tree.SpecifierExpression se = that.getSpecifierExpression();
boolean lazy = se instanceof Tree.LazySpecifierExpression;
if (declaration instanceof Value) {
Value value = (Value) declaration;
if (!value.isVariable() && lazy != value.isTransient()) {
// check that all assignments to a non-variable, in
// different paths of execution, all use the same
// kind of specifier, all =>, or all =
// TODO: sometimes this error appears only because
// of a later line which illegally reassigns
se.addError(
"value must be specified using => lazy specifier: '" + member.getName() + "'");
}
if (lazy) {
if (value.isVariable()) {
se.addError(
"variable value may not be specified using => lazy specifier: '"
+ member.getName()
+ "'");
} else if (value.isLate()) {
se.addError(
"late reference may not be specified using => lazy specifier: '"
+ member.getName()
+ "'");
}
}
}
if (!lazy || !parameterized) {
se.visit(this);
}
boolean constant = !isVariable() && !isLate();
Scope scope = that.getScope();
if (constant && !declaration.isDefinedInScope(scope)) {
// this error is added by ExpressionVisitor
// that.addError("inherited member is not variable and may not be
// specified here: '" +
// member.getName() + "'");
} else if (!declared && constant) {
bme.addError(shortdesc() + " is not yet declared: '" + member.getName() + "'");
} else if (inLoop && constant && !(endsInBreakReturnThrow && lastContinue == null)) {
if (specified.definitely) {
bme.addError(
longdesc() + " is aready definitely specified: '" + member.getName() + "'", 803);
} else {
bme.addError(
longdesc() + " is not definitely unspecified in loop: '" + member.getName() + "'",
803);
}
} else if (withinDeclaration && constant && !that.getRefinement()) {
Declaration dec = getContainingDeclarationOfScope(scope);
if (dec != null && dec.equals(member)) {
bme.addError(
"cannot specify "
+ shortdesc()
+ " from within its own body: '"
+ member.getName()
+ "'");
} else {
bme.addError(
"cannot specify "
+ shortdesc()
+ " declared in outer scope: '"
+ member.getName()
+ "'",
803);
}
} else if (specified.possibly && constant) {
if (specified.definitely) {
bme.addError(
longdesc() + " is aready definitely specified: '" + member.getName() + "'", 803);
} else {
bme.addError(
longdesc() + " is not definitely unspecified: '" + member.getName() + "'", 803);
}
} else {
specify();
term.visit(this);
}
if (lazy && parameterized) {
se.visit(this);
}
} else {
super.visit(that);
}
} else {
super.visit(that);
}
}
private void visitReference(Tree.Primary that) {
Declaration member;
boolean assigned;
boolean metamodel;
if (that instanceof Tree.MemberOrTypeExpression) {
Tree.MemberOrTypeExpression mte = (Tree.MemberOrTypeExpression) that;
member = mte.getDeclaration();
assigned = mte.getAssigned();
metamodel = false;
} else if (that instanceof Tree.MetaLiteral) {
Tree.MetaLiteral ml = (Tree.MetaLiteral) that;
member = ml.getDeclaration();
assigned = false;
metamodel = true;
} else {
return;
}
if (member == declaration && member.isDefinedInScope(that.getScope())) {
if (!declared) {
// you are allowed to refer to later
// declarations in a class declaration
// section or interface
if (withinAttributeInitializer
&& member instanceof Value
&& !(((Value) member).isTransient())) {
that.addError(
"reference to value within its initializer: '" + member.getName() + "'", 1460);
} else if (!metamodel && !isForwardReferenceable() && !hasParameter) {
Scope container = declaration.getContainer();
if (container instanceof Class) {
that.addError(
"forward reference to class member in initializer: '"
+ member.getName()
+ "' is not yet declared (forward references must occur in declaration section)");
} else {
that.addError(
"forward reference to local declaration: '"
+ member.getName()
+ "' is not yet declared");
}
}
} else if (!specified.definitely || declaration.isFormal()) {
// you are allowed to refer to formal
// declarations in a class declaration
// section or interface
if (declaration.isFormal()) {
if (!isForwardReferenceable()) {
that.addError(
"formal member may not be used in initializer: '" + member.getName() + "'");
}
} else if (!metamodel
&& !isNativeHeader(declaration)
&& (!isLate() || !isForwardReferenceable())) {
if (isVariable()) {
that.addError("not definitely initialized: '" + member.getName() + "'");
} else {
that.addError("not definitely specified: '" + member.getName() + "'");
}
}
}
if (!assigned && member.isDefault() && !isForwardReferenceable()) {
that.addError("default member may not be used in initializer: '" + member.getName() + "'");
}
if (inAnonFunctionOrComprehension && specified.definitely && isVariable()) {
that.addError(
"variable member may not be captured by comprehension or function in extends clause: '"
+ member.getName()
+ "'");
}
}
}