@Override
void validate(final ValidationEnvironment env) throws EvalException {
ValidationEnvironment localEnv = new ValidationEnvironment(env);
FunctionSignature sig = signature.getSignature();
FunctionSignature.Shape shape = sig.getShape();
ImmutableList<String> names = sig.getNames();
List<Expression> defaultExpressions = signature.getDefaultValues();
int positionals = shape.getPositionals();
int mandatoryPositionals = shape.getMandatoryPositionals();
int namedOnly = shape.getNamedOnly();
int mandatoryNamedOnly = shape.getMandatoryNamedOnly();
boolean starArg = shape.hasStarArg();
boolean kwArg = shape.hasKwArg();
int named = positionals + namedOnly;
int args = named + (starArg ? 1 : 0) + (kwArg ? 1 : 0);
int startOptionals = mandatoryPositionals;
int endOptionals = named - mandatoryNamedOnly;
int j = 0; // index for the defaultExpressions
for (int i = 0; i < args; i++) {
String name = names.get(i);
if (startOptionals <= i && i < endOptionals) {
defaultExpressions.get(j++).validate(env);
}
localEnv.declare(name, getLocation());
}
for (Statement stmts : statements) {
stmts.validate(localEnv);
}
}
/** Create a function using a signature with defaults */
public MixedModeFunction(
String name, FunctionSignature.WithValues<Object, SkylarkType> signature, Location location) {
super(name);
// TODO(bazel-team): lift the following limitations, by actually implementing
// the full function call protocol.
FunctionSignature sig = signature.getSignature();
FunctionSignature.Shape shape = sig.getShape();
Preconditions.checkArgument(
!shape.hasKwArg() && !shape.hasStarArg() && shape.getNamedOnly() == 0,
"no star, star-star or named-only parameters (for now)");
this.signature = signature;
this.parameters = ImmutableList.copyOf(sig.getNames());
this.numMandatoryParameters = shape.getMandatoryPositionals();
this.onlyNamedArguments = false;
this.location = location;
}