// RUN: mlir-pdll %s -I %S -split-input-file | FileCheck %s

// CHECK:  Module
// CHECK:  `-UserConstraintDecl {{.*}} Name<Foo> ResultType<Tuple<>>
Constraint Foo();

// -----

// CHECK:  Module
// CHECK:  `-UserConstraintDecl {{.*}} Name<Foo> ResultType<Tuple<>> Code< /* Native Code */ >
Constraint Foo() [{ /* Native Code */ }];

// -----

// CHECK: Module
// CHECK: `-UserConstraintDecl {{.*}} Name<Foo> ResultType<Value>
// CHECK:   `Inputs`
// CHECK:     `-VariableDecl {{.*}} Name<arg> Type<Value>
// CHECK:   `Results`
// CHECK:     `-VariableDecl {{.*}} Name<> Type<Value>
// CHECK:   `-CompoundStmt {{.*}}
// CHECK:     `-ReturnStmt {{.*}}
// CHECK:       `-DeclRefExpr {{.*}} Type<Value>
// CHECK:         `-VariableDecl {{.*}} Name<arg> Type<Value>
Constraint Foo(arg: Value) -> Value => arg;

// -----

// CHECK: Module
// CHECK: `-UserConstraintDecl {{.*}} Name<Foo> ResultType<Tuple<result1: Value, result2: Attr>>
// CHECK:   `Results`
// CHECK:     |-VariableDecl {{.*}} Name<result1> Type<Value>
// CHECK:     | `Constraints`
// CHECK:     |   `-ValueConstraintDecl {{.*}}
// CHECK:     `-VariableDecl {{.*}} Name<result2> Type<Attr>
// CHECK:       `Constraints`
// CHECK:         `-AttrConstraintDecl {{.*}}
// CHECK:   `-CompoundStmt {{.*}}
// CHECK:     `-ReturnStmt {{.*}}
// CHECK:       `-TupleExpr {{.*}} Type<Tuple<result1: Value, result2: Attr>>
// CHECK:         |-MemberAccessExpr {{.*}} Member<0> Type<Value>
// CHECK:         | `-TupleExpr {{.*}} Type<Tuple<Value, Attr>>
// CHECK:         `-MemberAccessExpr {{.*}} Member<1> Type<Attr>
// CHECK:           `-TupleExpr {{.*}} Type<Tuple<Value, Attr>>
Constraint Foo() -> (result1: Value, result2: Attr) => (_: Value, attr<"10">);

// -----

// CHECK: Module
// CHECK: |-UserConstraintDecl {{.*}} Name<Bar> ResultType<Tuple<>>
// CHECK: `-UserConstraintDecl {{.*}} Name<Foo> ResultType<Value>
// CHECK:   `Inputs`
// CHECK:     `-VariableDecl {{.*}} Name<arg> Type<Value>
// CHECK:       `Constraints`
// CHECK:         `-UserConstraintDecl {{.*}} Name<Bar> ResultType<Tuple<>>
// CHECK:   `Results`
// CHECK:     `-VariableDecl {{.*}} Name<> Type<Value>
// CHECK:       `Constraints`
// CHECK:         `-UserConstraintDecl {{.*}} Name<Bar> ResultType<Tuple<>>
Constraint Bar(input: Value);

Constraint Foo(arg: Bar) -> Bar => arg;

// -----

// Test that anonymous constraints are uniquely named.

// CHECK: Module
// CHECK: UserConstraintDecl {{.*}} Name<<anonymous_constraint_0>> ResultType<Tuple<>>
// CHECK: UserConstraintDecl {{.*}} Name<<anonymous_constraint_1>> ResultType<Attr>
Constraint Outer() {
  Constraint() {};
  Constraint() => attr<"10">;
}