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package org.shedlang.compiler.shidtopatio;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.shedlang.compiler.ast.typed.FreeVariables;
import org.shedlang.compiler.patio.types.PatioTypes;
import org.shedlang.compiler.patio.instructions.Patio;
import org.shedlang.compiler.sources.Sources;
import org.shedlang.compiler.shid.instructions.ShidDefineFunction;
import org.shedlang.compiler.shid.instructions.Shid;
import org.shedlang.compiler.testing.snapshots.SnapshotResolver;
import org.shedlang.compiler.testing.snapshots.Snapshotter;
import java.io.IOException;
import java.util.List;
import static org.shedlang.compiler.shidtopatio.ShidToPatioTesting.serialize;
@ExtendWith({SnapshotResolver.class})
public class ShidToPatioDefineFunctionTests {
@Test
public void canDefineMinimalFunction(Snapshotter snapshotter) throws IOException {
var instruction = new ShidDefineFunction(
"f",
List.of(),
List.of(),
FreeVariables.empty(),
Shid.block(List.of(
Shid.pushUnit(),
Shid.return_()
)),
ShidDefineFunction.Variant.FUNCTION,
Sources.NULL
);
var context = ShidToPatioContext.EMPTY;
var result = ShidToPatio.generateInstruction(instruction, context);
snapshotter.assertSnapshot(serialize(result));
}
@Test
public void immutableFreeVariablesAreStoredInAndLoadedFromEnvironment(Snapshotter snapshotter) throws IOException {
var instruction = new ShidDefineFunction(
"f",
List.of(),
List.of(),
FreeVariables.builder().plus("a", Sources.NULL).plus("b", Sources.NULL).build(),
Shid.block(List.of(
Shid.localLoad("a"),
Shid.return_()
)),
ShidDefineFunction.Variant.FUNCTION,
Sources.NULL
);
var context = ShidToPatioContext.EMPTY
.defineShidParam("a")
.defineShidParam("b");
var result = ShidToPatio.generateInstruction(instruction, context);
snapshotter.assertSnapshot(serialize(result));
}
@Test
public void canCaptureFreeVariablesThatAreSetAfterDefinition(Snapshotter snapshotter) throws IOException {
var instruction = new ShidDefineFunction(
"f",
List.of(),
List.of(),
FreeVariables.builder().plus("a", Sources.NULL).plus("b", Sources.NULL).build(),
Shid.block(List.of(
Shid.localLoad("a"),
Shid.return_()
)),
ShidDefineFunction.Variant.FUNCTION,
Sources.NULL
);
var context = ShidToPatioContext.EMPTY
.declareShidVal("a", ShidToPatioTypes.VALUE_TYPE).context()
.declareShidVal("b", ShidToPatioTypes.VALUE_TYPE).context();
context = ShidToPatio.generateInstruction(instruction, context);
// We make sure there are some other instructions before setting the
// free variables so we can distinguish the free variable being copied
// into the closure upon closure creation (i.e. too soon) versus after
// the free variable is set.
context = context.addInstruction(Patio.localStore(Patio.localRef("a"), Patio.intConst(42)));
context = context.initShidLocal("a");
context = context.addInstruction(Patio.localStore(Patio.localRef("b"), Patio.intConst(47)));
context = context.initShidLocal("b");
snapshotter.assertSnapshot(serialize(context));
}
@Test
public void pointersToFreeMutableVariablesAreStoredInAndLoadedFromEnvironment(Snapshotter snapshotter) throws IOException {
var instruction = new ShidDefineFunction(
"f",
List.of(),
List.of(),
FreeVariables.builder()
.plus("a", Sources.NULL)
.plus("b", Sources.NULL)
.build(),
Shid.block(List.of(
Shid.localLoad("a"),
Shid.return_()
)),
ShidDefineFunction.Variant.FUNCTION,
Sources.NULL
);
var context = ShidToPatioContext.EMPTY
.declareShidVal("a", PatioTypes.DATA_PTR).context()
.initShidLocal("a")
.declareShidVal("b", PatioTypes.DATA_PTR).context()
.initShidLocal("b");
var result = ShidToPatio.generateInstruction(instruction, context);
snapshotter.assertSnapshot(serialize(result));
}
@Test
public void positionalAndNamedParamsAreDefined(Snapshotter snapshotter) throws IOException {
var instruction = new ShidDefineFunction(
"f",
List.of(Shid.param("param1"), Shid.param("param2")),
// Define named params in non-lexical order
List.of(Shid.param("paramB"), Shid.param("paramC"), Shid.param("paramA")),
FreeVariables.builder().plus("a", Sources.NULL).plus("b", Sources.NULL).build(),
Shid.block(List.of(
Shid.localLoad("a"),
Shid.localLoad("param1"),
Shid.intAdd(),
Shid.localLoad("paramA"),
Shid.intAdd(),
Shid.return_()
)),
ShidDefineFunction.Variant.FUNCTION,
Sources.NULL
);
var context = ShidToPatioContext.EMPTY
.defineShidParam("a")
.defineShidParam("b");
var result = ShidToPatio.generateInstruction(instruction, context);
snapshotter.assertSnapshot(serialize(result));
}
@Test
public void effectHandlerMethodSwapsEffectHandlerInBody(Snapshotter snapshotter) throws IOException {
var instruction = new ShidDefineFunction(
"f",
List.of(),
List.of(),
FreeVariables.empty(),
Shid.block(List.of(
Shid.pushUnit(),
Shid.resume()
)),
ShidDefineFunction.Variant.EFFECT_HANDLER_METHOD,
Sources.NULL
);
var context = ShidToPatioContext.EMPTY;
var result = ShidToPatio.generateInstruction(instruction, context);
snapshotter.assertSnapshot(serialize(result));
}
}
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