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package org.shedlang.compiler.shid;
import org.junit.jupiter.api.Test;
import org.shedlang.compiler.ast.typed.Typed;
import org.shedlang.compiler.ast.typed.TypedFunctionDefinitionNode;
import org.shedlang.compiler.shid.instructions.ShidDefineFunction;
import org.shedlang.compiler.types.Types;
import static org.shedlang.compiler.shid.instructions.ShidMatchers.*;
import static org.zwobble.precisely.AssertThat.assertThat;
import static org.zwobble.precisely.Matchers.*;
public class ShidCodeGenFunctionDefinitionTests {
@Test
public void functionIsCompiledToDefineFunctionInstruction() {
var node = TypedFunctionDefinitionNode.builder()
.withName("f")
.addPositionalParam("x", Typed.typeLevelReference("String", Types.STRING))
.addNamedParam("y", Typed.typeLevelReference("Int", Types.INT))
.addFreeVariable("z")
.addStatement(Typed.expressionStatement(Typed.stringLiteral("hello")))
.build();
var context = ShidCodeGen.Context.EMPTY
.addShedVal("f")
.addShedVal("z");
var result = ShidCodeGen.compileNamespaceStatement(node, context);
assertThat(result.instructions(), isSequence(
instanceOf(
ShidDefineFunction.class,
has("name", x -> x.name(), equalTo("f")),
has("positionalParams", x -> x.positionalParams(), isSequence(
isShidDefineFunctionParam("x__0")
)),
has("namedParams", x -> x.namedParams(), isSequence(
isShidDefineFunctionParam("y__0")
)),
has("freeVariables", x -> x.freeVariables(), containsExactly(
has("name", x -> x.name(), equalTo("z__0"))
)),
has("body", x -> x.body(), isShidBlock(isSequence(
isShidPushString("hello"),
isShidDiscard(),
isShidPushUnit(),
isShidReturn()
)))
),
isShidLocalStore("f__0")
));
}
@Test
public void whenLastStatementIsBlockReturnThenThatValueIsReturned() {
var node = TypedFunctionDefinitionNode.builder()
.withName("f")
.addStatement(Typed.blockReturn(Typed.stringLiteral("hello")))
.build();
var context = ShidCodeGen.Context.EMPTY
.addShedVal("f");
var result = ShidCodeGen.compileNamespaceStatement(node, context);
assertThat(result.instructions(), isSequence(
instanceOf(
ShidDefineFunction.class,
has("body", x -> x.body(), isShidBlock(isSequence(
isShidPushString("hello"),
isShidReturn()
)))
),
isShidLocalStore("f__0")
));
}
}
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