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package org.zwobble.couscous.backends.csharp;
import com.google.common.collect.ImmutableMap;
import org.zwobble.couscous.ast.ExpressionNode;
import org.zwobble.couscous.ast.TypeName;
import org.zwobble.couscous.values.BooleanValue;
import org.zwobble.couscous.values.IntegerValue;
import org.zwobble.couscous.values.ObjectValues;
import org.zwobble.couscous.values.StringValue;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import static org.zwobble.couscous.ast.FieldAccessNode.fieldAccess;
import static org.zwobble.couscous.ast.MethodCallNode.methodCall;
import static org.zwobble.couscous.ast.MethodCallNode.staticMethodCall;
import static org.zwobble.couscous.ast.Operations.integerSubtract;
import static org.zwobble.couscous.util.ExtraLists.list;
public class CsharpPrimitiveMethods {
private static final Map<String, PrimitiveMethodGenerator> BOOLEAN_METHODS;
static {
ImmutableMap.Builder<String, PrimitiveMethodGenerator> methods = ImmutableMap.builder();
BOOLEAN_METHODS = methods.build();
}
private static final Map<String, PrimitiveMethodGenerator> STRING_METHODS;
static {
ImmutableMap.Builder<String, PrimitiveMethodGenerator> methods = ImmutableMap.builder();
methods.put("length", (receiver, arguments) -> fieldAccess(receiver, "Length", IntegerValue.REF));
methods.put("substring", (receiver, arguments) -> {
ExpressionNode startIndex = arguments.get(0);
ExpressionNode endIndex = arguments.get(1);
ExpressionNode length = integerSubtract(endIndex, startIndex);
// TODO: handle length going beyond end-of-string
return methodCall(
receiver,
"Substring",
list(startIndex, length),
StringValue.REF);
});
methods.put("toLowerCase", (receiver, arguments) -> methodCall(
receiver,
"ToLower",
list(),
StringValue.REF));
STRING_METHODS = methods.build();
}
private static final Map<TypeName, Map<String, PrimitiveMethodGenerator>> METHODS =
ImmutableMap.<TypeName, Map<String, PrimitiveMethodGenerator>>builder()
.put(BooleanValue.REF, BOOLEAN_METHODS)
.put(StringValue.REF, STRING_METHODS)
.build();
private static final Map<String, PrimitiveStaticMethodGenerator> STATIC_INT_METHODS =
ImmutableMap.<String, PrimitiveStaticMethodGenerator>builder()
.put("parseInt", arguments -> staticMethodCall(
TypeName.of("int"),
"Parse",
list(arguments.get(0)),
TypeName.of("int")))
.build();
private static final Map<TypeName, Map<String, PrimitiveStaticMethodGenerator>> STATIC_METHODS =
ImmutableMap.<TypeName, Map<String, PrimitiveStaticMethodGenerator>>builder()
.put(ObjectValues.BOXED_INT, STATIC_INT_METHODS)
.build();
public static Optional<PrimitiveMethodGenerator> getPrimitiveMethod(TypeName type, String methodName) {
return Optional.ofNullable(METHODS.get(type))
.flatMap(methodsForType -> Optional.ofNullable(methodsForType.get(methodName)));
}
@FunctionalInterface
public interface PrimitiveMethodGenerator {
ExpressionNode generate(ExpressionNode receiver, List<ExpressionNode> arguments);
}
public static Optional<PrimitiveStaticMethodGenerator> getPrimitiveStaticMethod(TypeName type, String methodName) {
return Optional.ofNullable(STATIC_METHODS.get(type))
.flatMap(methodsForType -> Optional.ofNullable(methodsForType.get(methodName)));
}
@FunctionalInterface
public interface PrimitiveStaticMethodGenerator {
ExpressionNode generate(List<ExpressionNode> arguments);
}
}
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