public IErrorReporter ErrorUnusedExpression()
{
NameResolver resolver = null;
foreach (var mutability in Options.AllMutabilityModes)
{
var env = Environment.Create(new Options()
{
}.SetMutability(mutability));
var root_ns = env.Root;
var system_ns = env.SystemNamespace;
var var_decl = VariableDeclaration.CreateStatement("x", NameFactory.BoolNameReference(), Undef.Create());
var var_ref = NameReference.Create("x");
FunctionDefinition func_def = root_ns.AddBuilder(FunctionBuilder.Create(
"foo",
ExpressionReadMode.OptionalUse,
NameFactory.BoolNameReference(),
Block.CreateStatement(new IExpression[] {
var_decl,
var_ref,
Return.Create(BoolLiteral.CreateTrue())
})));
resolver = NameResolver.Create(env);
Assert.AreEqual(1, resolver.ErrorManager.Errors.Count);
Assert.AreEqual(ErrorCode.ExpressionValueNotUsed, resolver.ErrorManager.Errors.Single().Code);
Assert.AreEqual(var_ref, resolver.ErrorManager.Errors.Single().Node);
}
return(resolver);
}
public IErrorReporter ReadingIfAsExpression()
{
NameResolver resolver = null;
foreach (var mutability in Options.AllMutabilityModes)
{
var env = Environment.Create(new Options()
{
GlobalVariables = true,
RelaxedMode = true
}.SetMutability(mutability));
var root_ns = env.Root;
var if_ctrl = IfBranch.CreateIf(BoolLiteral.CreateTrue(),
new IExpression[] { Int64Literal.Create("5") },
IfBranch.CreateElse(new[] { Int64Literal.Create("7") }));
root_ns.AddNode(VariableDeclaration.CreateStatement("x", NameFactory.Int64NameReference(), if_ctrl, EntityModifier.Public));
resolver = NameResolver.Create(env);
Assert.AreEqual(0, resolver.ErrorManager.Errors.Count);
}
return(resolver);
}
public IErrorReporter ErrorCannotInferResultType()
{
NameResolver resolver = null;
foreach (var mutability in Options.AllMutabilityModes)
{
var env = Environment.Create(new Options()
{
DiscardingAnyExpressionDuringTests = true
}.SetMutability(mutability));
var root_ns = env.Root;
IExpression lambda = FunctionBuilder.CreateLambda(null,
Block.CreateStatement(new IExpression[] {
IfBranch.CreateIf(BoolLiteral.CreateFalse(), new[] {
Return.Create(BoolLiteral.CreateTrue())
}),
Return.Create(Int64Literal.Create("2"))
})).Build();
root_ns.AddBuilder(FunctionBuilder.Create("me",
ExpressionReadMode.OptionalUse,
NameFactory.UnitNameReference(),
Block.CreateStatement(new IExpression[] {
// f = () => x
VariableDeclaration.CreateStatement("f", null, lambda),
ExpressionFactory.Readout("f")
})));
resolver = NameResolver.Create(env);
Assert.AreEqual(1, resolver.ErrorManager.Errors.Count);
Assert.IsTrue(resolver.ErrorManager.HasError(ErrorCode.CannotInferResultType, lambda));
}
return(resolver);
}
public IErrorReporter ErrorReadingFunctionVoidResult()
{
NameResolver resolver = null;
foreach (var mutability in Options.AllMutabilityModes)
{
var env = Environment.Create(new Options()
{
GlobalVariables = true,
RelaxedMode = true
}.SetMutability(mutability));
var root_ns = env.Root;
root_ns.AddBuilder(FunctionBuilder.Create(
"foo",
ExpressionReadMode.CannotBeRead,
NameFactory.BoolNameReference(),
Block.CreateStatement(new[] {
Return.Create(BoolLiteral.CreateTrue())
}))
.Parameters(FunctionParameter.Create("x", NameFactory.Int64NameReference(), usageMode: ExpressionReadMode.CannotBeRead)));
root_ns.AddNode(VariableDeclaration.CreateStatement("i", NameFactory.Int64NameReference(), Undef.Create()));
var call = FunctionCall.Create(NameReference.Create("foo"), FunctionArgument.Create(NameReference.Create("i")));
VariableDeclaration decl = VariableDeclaration.CreateStatement("x", NameFactory.BoolNameReference(),
call, EntityModifier.Public);
root_ns.AddNode(decl);
resolver = NameResolver.Create(env);
Assert.AreEqual(1, resolver.ErrorManager.Errors.Count);
Assert.IsTrue(resolver.ErrorManager.HasError(ErrorCode.CannotReadExpression, call));
}
return(resolver);
}
public IErrorReporter ErrorIfScope()
{
NameResolver resolver = null;
foreach (var mutability in Options.AllMutabilityModes)
{
var env = Environment.Create(new Options()
{
DiscardingAnyExpressionDuringTests = true,
}.SetMutability(mutability));
var root_ns = env.Root;
NameReference bad_ref = NameReference.Create("x");
root_ns.AddBuilder(FunctionBuilder.Create(
"testing",
NameFactory.UnitNameReference(),
Block.CreateStatement(
VariableDeclaration.CreateStatement("b", NameFactory.BoolNameReference(), Undef.Create(),
env.Options.ReassignableModifier()),
IfBranch.CreateIf(VariableDeclaration.CreateExpression("x", null, BoolLiteral.CreateTrue()),
// x is in scope
Assignment.CreateStatement("b", "x"),
IfBranch.CreateElse(
// x is in scope as well
Assignment.CreateStatement("b", "x"))),
// here x is not in the scope (is already removed)
Assignment.CreateStatement(NameReference.Create("b"), bad_ref),
ExpressionFactory.Readout("b")
)));
resolver = NameResolver.Create(env);
Assert.AreEqual(1, resolver.ErrorManager.Errors.Count);
Assert.IsTrue(resolver.ErrorManager.HasError(ErrorCode.ReferenceNotFound, bad_ref));
}
return(resolver);
}
public IErrorReporter TranslationTableOfInferredCommonTypes()
{
NameResolver resolver = null;
foreach (var mutability in Options.AllMutabilityModes)
{
var env = Environment.Create(new Options()
{
}.SetMutability(mutability));
var root_ns = env.Root;
TemplateParameter template_param = TemplateParametersBuffer.Create("T").Values.Single();
root_ns.AddBuilder(FunctionBuilder.Create("getMe", new[] { template_param },
ExpressionReadMode.OptionalUse,
NameFactory.UnitNameReference(), Block.CreateStatement())
.Parameters(FunctionParameter.Create("a", NameFactory.ReferenceNameReference("T"), ExpressionReadMode.CannotBeRead),
FunctionParameter.Create("b", NameFactory.ReferenceNameReference("T"), ExpressionReadMode.CannotBeRead)));
FunctionCall call = FunctionCall.Create(NameReference.Create("getMe"), NameReference.Create("x"), NameReference.Create("y"));
root_ns.AddBuilder(FunctionBuilder.Create("common",
NameFactory.UnitNameReference(),
Block.CreateStatement(
VariableDeclaration.CreateStatement("x", NameFactory.ReferenceNameReference(NameFactory.Int64NameReference()),
Int64Literal.Create("3")),
VariableDeclaration.CreateStatement("y", NameFactory.ReferenceNameReference(NameFactory.BoolNameReference()),
BoolLiteral.CreateTrue()),
call
)));
resolver = NameResolver.Create(env);
Assert.AreEqual(0, resolver.ErrorManager.Errors.Count);
// the actual point of this test are those two lines checking if we get correct translation table for entire
// instance of the called function
Assert.IsTrue(call.Resolution.TargetFunctionInstance.Translation.Translate(template_param,
out IEntityInstance common_instance));
Assert.AreEqual(resolver.Context.Env.IEquatableType.InstanceOf, common_instance);
}
return(resolver);
}
public static TypeBuilder WithEquatableEquals(this TypeBuilder builder, EntityModifier modifier = null)
{
return(builder.With(FunctionBuilder.Create(NameFactory.EqualOperator,
ExpressionReadMode.ReadRequired, NameFactory.BoolNameReference(),
Block.CreateStatement(
IfBranch.CreateIf(IsSame.Create(NameReference.CreateThised(), NameReference.Create("cmp")),
new[] { Return.Create(BoolLiteral.CreateTrue()) }),
// let obj = cmp cast? Self
VariableDeclaration.CreateStatement("obj", null, ExpressionFactory.CheckedSelfCast("cmp",
NameFactory.ReferenceNameReference(builder.CreateTypeNameReference(TypeMutability.ReadOnly)))),
// return this==obj.value
Return.Create(ExpressionFactory.IsEqual(NameReference.Create(NameFactory.ThisVariableName),
NameReference.Create("obj")))))
.SetModifier(EntityModifier.Override | modifier)
.Parameters(FunctionParameter.Create("cmp",
NameFactory.ReferenceNameReference(NameFactory.IEquatableNameReference(TypeMutability.ReadOnly))))));
}
public IInterpreter ShortcutComputationInOptionalDeclaration()
{
var interpreter = new Interpreter.Interpreter();
foreach (var mutability in Options.AllMutabilityModes)
{
// purpose: check if RHS of the optional declaration is computed only when it is needed
// here we count RHS computations and since we declare two variables
// let (x,y) =? (None,Some)
// Some should not be executed, because `x` assigment fails first
var env = Language.Environment.Create(new Options()
{
DebugThrowOnError = true,
DiscardingAnyExpressionDuringTests = true,
}.SetMutability(mutability));
var root_ns = env.Root;
root_ns.AddBuilder(TypeBuilder.Create("Mutator")
.SetModifier(EntityModifier.Mutable)
.With(VariableDeclaration.CreateStatement("c", NameFactory.IntNameReference(), null,
env.Options.ReassignableModifier() | EntityModifier.Public)));
// return Some or None depending on the `f` parameter, and also increments the count of option evaluations
root_ns.AddBuilder(FunctionBuilder.Create("give", NameFactory.OptionNameReference(NameFactory.Nat8NameReference()),
Block.CreateStatement(
ExpressionFactory.Inc(() => NameReference.Create("m", "c")),
Return.Create(ExpressionFactory.Ternary(NameReference.Create("f"),
ExpressionFactory.OptionOf(NameFactory.Nat8NameReference(), Nat8Literal.Create("11")),
ExpressionFactory.OptionEmpty(NameFactory.Nat8NameReference())))
))
.Parameters(FunctionParameter.Create("f", NameFactory.BoolNameReference()),
FunctionParameter.Create("m", NameFactory.ReferenceNameReference(NameReference.Create("Mutator")))));
IExpression opt_declaration = ExpressionFactory.OptionalDeclaration(new[] {
VariablePrototype.Create("x", NameFactory.Nat8NameReference()),
VariablePrototype.Create("y", NameFactory.Nat8NameReference())
}, new[] {
FunctionCall.Create("give", BoolLiteral.CreateFalse(), NameReference.Create("mut")),
FunctionCall.Create("give", BoolLiteral.CreateTrue(), NameReference.Create("mut")),
});
root_ns.AddBuilder(FunctionBuilder.Create("main",
ExpressionReadMode.OptionalUse,
NameFactory.Nat8NameReference(),
Block.CreateStatement(
VariableDeclaration.CreateStatement("mut", null, ExpressionFactory.StackConstructor(NameReference.Create("Mutator"))),
IfBranch.CreateIf(opt_declaration,
new[] {
ExpressionFactory.Readout("x"),
ExpressionFactory.Readout("y"),
ExpressionFactory.GenericThrow(),
},
IfBranch.CreateElse(
// crucial check -- we should not evaluate the second option
ExpressionFactory.AssertEqual(IntLiteral.Create("1"), NameReference.Create("mut", "c"))
)),
Return.Create(Nat8Literal.Create("0"))
)));
ExecValue result = interpreter.TestRun(env);
Assert.AreEqual((byte)0, result.RetValue.PlainValue);
}
return(interpreter);
}
public static IExpression OptionalAssignment(IEnumerable <IExpression> lhsExpressions, IEnumerable <IExpression> rhsExpressions)
{
// todo: add support for spread
if (lhsExpressions.Count() != rhsExpressions.Count())
{
throw new NotImplementedException();
}
// please note we could have dummy assignments in form
// _ ?= x
// in such case we are not interested in the assigment but the fact it was sucessful or not
lhsExpressions = lhsExpressions.Select(lhs => lhs is NameReference lhs_name && lhs_name.IsSink ? null : lhs);
var temp_names = new List <string>();
IExpression condition = null;
foreach (Tuple <IExpression, IExpression> pair in rhsExpressions.SyncZip(lhsExpressions))
{
IExpression rhs = pair.Item1;
IExpression lhs = pair.Item2;
IExpression opt;
if (lhs == null)
{
temp_names.Add(null);
opt = rhs;
}
else
{
string temp = AutoName.Instance.CreateNew("optassign");
temp_names.Add(temp);
opt = VariableDeclaration.CreateExpression(temp, null, rhs);
}
IExpression curr = NameReference.Create(opt, BrowseMode.Decompose, NameFactory.OptionHasValue);
if (condition == null)
{
condition = curr;
}
else
{
condition = And(condition, curr);
}
}
var success_body = new List <IExpression>();
{
foreach (Tuple <IExpression, string> pair in lhsExpressions.SyncZip(temp_names))
{
IExpression lhs = pair.Item1;
string temp = pair.Item2;
if (lhs != null)
{
success_body.Add(Assignment.CreateStatement(lhs,
NameReference.Create(NameReference.Create(temp), BrowseMode.Decompose, NameFactory.OptionValue)));
}
}
success_body.Add(BoolLiteral.CreateTrue());
}
IfBranch result = IfBranch.CreateIf(condition,
success_body,
IfBranch.CreateElse(BoolLiteral.CreateFalse()));
return(result);
}
public IInterpreter DereferenceOnIfCondition()
{
var interpreter = new Interpreter.Interpreter();
foreach (var mutability in Options.AllMutabilityModes)
{
var env = Language.Environment.Create(new Options()
{
DebugThrowOnError = true,
AllowInvalidMainResult = true
}.SetMutability(mutability));
var root_ns = env.Root;
var main_func = root_ns.AddBuilder(FunctionBuilder.Create(
"main",
ExpressionReadMode.OptionalUse,
NameFactory.Int64NameReference(),
Block.CreateStatement(new IExpression[] {
VariableDeclaration.CreateStatement("ptr", NameFactory.PointerNameReference(NameFactory.BoolNameReference()),
ExpressionFactory.HeapConstructor(NameFactory.BoolNameReference(), FunctionArgument.Create(BoolLiteral.CreateTrue()))),
Return.Create(IfBranch.CreateIf(NameReference.Create("ptr"), new[] { Int64Literal.Create("2") },
IfBranch.CreateElse(new[] { Int64Literal.Create("5") }))),
})));
ExecValue result = interpreter.TestRun(env);
Assert.AreEqual(2L, result.RetValue.PlainValue);
}
return(interpreter);
}