mirrors/llvm-project
0
0
Fork 0
mirror of https://github.com/llvm/llvm-project.git synced 2025-04-16 11:26:42 +00:00
Code Issues Projects Releases Wiki Activity
llvm-project/clang/test/SemaTemplate/make_integer_seq.cpp
Matheus Izvekov bcd9ba2b7e
[clang] Track the templated entity in type substitution. 
This is a change to how we represent type subsitution in the AST.
Instead of only storing the replaced type, we track the templated
entity we are substituting, plus an index.
We modify MLTAL to track the templated entity at each level.

Otherwise, it's much more expensive to go from the template parameter back
to the templated entity, and not possible to do in some cases, as when
we instantiate outer templates, parameters might still reference the
original entity.

This also allows us to very cheaply lookup the templated entity we saw in
the naming context and find the corresponding argument it was replaced
from, such as for implementing template specialization resugaring.

Signed-off-by: Matheus Izvekov <mizvekov@gmail.com>

Differential Revision: https://reviews.llvm.org/D131858
2022-10-15 22:08:36 +02:00

143 lines
9.6 KiB
C++
Raw Blame History

// RUN: %clang_cc1 -std=c++2b -fsyntax-only -triple x86_64-linux-gnu -ast-dump -verify -xc++ < %s | FileCheck %s
template <class A1, A1... A2> struct A {};
using test1 = __make_integer_seq<A, int, 1>;
// CHECK: |-TypeAliasDecl 0x{{[0-9A-Fa-f]+}} <line:5:1, col:43> col:7 test1 '__make_integer_seq<A, int, 1>':'A<int, 0>'
// CHECK-NEXT: `-ElaboratedType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, int, 1>' sugar
// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, int, 1>' sugar alias __make_integer_seq
// CHECK-NEXT: |-TemplateArgument template A
// CHECK-NEXT: |-TemplateArgument type 'int'
// CHECK-NEXT: | `-BuiltinType 0x{{[0-9A-Fa-f]+}} 'int'
// CHECK-NEXT: |-TemplateArgument expr
// CHECK-NEXT: | `-ConstantExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'int'
// CHECK-NEXT: | |-value: Int 1
// CHECK-NEXT: | `-IntegerLiteral 0x{{[0-9A-Fa-f]+}} <col:42> 'int' 1
// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} 'A<int, 0>' sugar A
// CHECK-NEXT: |-TemplateArgument type 'int':'int'
// CHECK-NEXT: | `-SubstTemplateTypeParmType 0x{{[0-9A-Fa-f]+}} 'int' sugar typename depth 0 index 1
// CHECK-NEXT: | |-BuiltinTemplate 0x{{[0-9A-Fa-f]+}} '__make_integer_seq'
// CHECK-NEXT: | `-BuiltinType 0x{{[0-9A-Fa-f]+}} 'int'
// CHECK-NEXT: |-TemplateArgument expr
// CHECK-NEXT: | `-ConstantExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'int'
// CHECK-NEXT: | |-value: Int 0
// CHECK-NEXT: | `-IntegerLiteral 0x{{[0-9A-Fa-f]+}} <col:42> 'int':'int' 0
// CHECK-NEXT: `-RecordType 0x{{[0-9A-Fa-f]+}} 'A<int, 0>'
// CHECK-NEXT: `-ClassTemplateSpecialization 0x{{[0-9A-Fa-f]+}} 'A'
template <class B1, B1 B2> using B = __make_integer_seq<A, B1, B2>;
using test2 = B<int, 1>;
// CHECK: |-TypeAliasDecl 0x{{[0-9A-Fa-f]+}} <line:29:1, col:23> col:7 test2 'B<int, 1>':'A<int, 0>'
// CHECK-NEXT: `-ElaboratedType 0x{{[0-9A-Fa-f]+}} 'B<int, 1>' sugar
// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} 'B<int, 1>' sugar alias B
// CHECK-NEXT: |-TemplateArgument type 'int'
// CHECK-NEXT: | `-BuiltinType 0x{{[0-9A-Fa-f]+}} 'int'
// CHECK-NEXT: |-TemplateArgument expr
// CHECK-NEXT: | `-ConstantExpr 0x{{[0-9A-Fa-f]+}} <col:22> 'int'
// CHECK-NEXT: | |-value: Int 1
// CHECK-NEXT: | `-IntegerLiteral 0x{{[0-9A-Fa-f]+}} <col:22> 'int' 1
// CHECK-NEXT: `-ElaboratedType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, int, 1>' sugar
// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, int, 1>' sugar alias __make_integer_seq
// CHECK-NEXT: |-TemplateArgument template A
// CHECK-NEXT: |-TemplateArgument type 'int':'int'
// CHECK-NEXT: | `-SubstTemplateTypeParmType 0x{{[0-9A-Fa-f]+}} 'int' sugar class depth 0 index 0 B1
// CHECK-NEXT: | |-TypeAliasTemplate 0x{{[0-9A-Fa-f]+}} 'B'
// CHECK-NEXT: | `-BuiltinType 0x{{[0-9A-Fa-f]+}} 'int'
// CHECK-NEXT: |-TemplateArgument expr
// CHECK-NEXT: | `-ConstantExpr 0x{{[0-9A-Fa-f]+}} <line:28:64> 'int'
// CHECK-NEXT: | |-value: Int 1
// CHECK-NEXT: | `-SubstNonTypeTemplateParmExpr 0x{{[0-9A-Fa-f]+}} <col:64> 'int'
// CHECK-NEXT: | |-NonTypeTemplateParmDecl 0x{{[0-9A-Fa-f]+}} <col:21, col:24> col:24 referenced 'B1' depth 0 index 1 B2
// CHECK-NEXT: | `-IntegerLiteral 0x{{[0-9A-Fa-f]+}} <col:64> 'int' 1
// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} 'A<int, 0>' sugar A
// CHECK-NEXT: |-TemplateArgument type 'int':'int'
// CHECK-NEXT: | `-SubstTemplateTypeParmType 0x{{[0-9A-Fa-f]+}} 'int' sugar typename depth 0 index 1
// CHECK-NEXT: | |-BuiltinTemplate 0x{{[0-9A-Fa-f]+}} '__make_integer_seq'
// CHECK-NEXT: | `-BuiltinType 0x{{[0-9A-Fa-f]+}} 'int'
// CHECK-NEXT: |-TemplateArgument expr
// CHECK-NEXT: | `-ConstantExpr 0x{{[0-9A-Fa-f]+}} <col:64> 'int'
// CHECK-NEXT: | |-value: Int 0
// CHECK-NEXT: | `-IntegerLiteral 0x{{[0-9A-Fa-f]+}} <col:64> 'int':'int' 0
// CHECK-NEXT: `-RecordType 0x{{[0-9A-Fa-f]+}} 'A<int, 0>'
// CHECK-NEXT: `-ClassTemplateSpecialization 0x{{[0-9A-Fa-f]+}} 'A'
template <template <class T, T...> class S, class T, int N> struct C {
using test3 = __make_integer_seq<S, T, N>;
// CHECK: |-TypeAliasDecl 0x{{[0-9A-Fa-f]+}} <line:65:3, col:43> col:9 test3 '__make_integer_seq<S, T, N>':'__make_integer_seq<type-parameter-0-1, N>'
// CHECK-NEXT: `-ElaboratedType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<S, T, N>' sugar dependent
// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<S, T, N>' sugar dependent alias __make_integer_seq
// CHECK-NEXT: |-TemplateArgument template S
// CHECK-NEXT: |-TemplateArgument type 'T'
// CHECK-NEXT: | `-TemplateTypeParmType 0x{{[0-9A-Fa-f]+}} 'T' dependent depth 0 index 1
// CHECK-NEXT: | `-TemplateTypeParm 0x{{[0-9A-Fa-f]+}} 'T'
// CHECK-NEXT: |-TemplateArgument expr
// CHECK-NEXT: | `-ImplicitCastExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'type-parameter-0-1':'type-parameter-0-1' <Dependent>
// CHECK-NEXT: | `-DeclRefExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'int' NonTypeTemplateParm 0x{{[0-9A-Fa-f]+}} 'N' 'int'
// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<type-parameter-0-1, N>' dependent __make_integer_seq
// CHECK-NEXT: |-TemplateArgument template
// CHECK-NEXT: |-TemplateArgument type 'type-parameter-0-1'
// CHECK-NEXT: | `-TemplateTypeParmType 0x{{[0-9A-Fa-f]+}} 'type-parameter-0-1' dependent depth 0 index 1
// CHECK-NEXT: `-TemplateArgument expr
// CHECK-NEXT: `-ImplicitCastExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'type-parameter-0-1':'type-parameter-0-1' <Dependent>
// CHECK-NEXT: `-DeclRefExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'int' NonTypeTemplateParm 0x{{[0-9A-Fa-f]+}} 'N' 'int'
using test4 = __make_integer_seq<A, T, 1>;
// CHECK: |-TypeAliasDecl 0x{{[0-9A-Fa-f]+}} <line:84:3, col:43> col:9 test4 '__make_integer_seq<A, T, 1>':'__make_integer_seq<A, type-parameter-0-1, 1>'
// CHECK-NEXT: `-ElaboratedType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, T, 1>' sugar dependent
// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, T, 1>' sugar dependent alias __make_integer_seq
// CHECK-NEXT: |-TemplateArgument template A
// CHECK-NEXT: |-TemplateArgument type 'T'
// CHECK-NEXT: | `-TemplateTypeParmType 0x{{[0-9A-Fa-f]+}} 'T' dependent depth 0 index 1
// CHECK-NEXT: | `-TemplateTypeParm 0x{{[0-9A-Fa-f]+}} 'T'
// CHECK-NEXT: |-TemplateArgument expr
// CHECK-NEXT: | `-ImplicitCastExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'type-parameter-0-1':'type-parameter-0-1' <Dependent>
// CHECK-NEXT: | `-IntegerLiteral 0x{{[0-9A-Fa-f]+}} <col:42> 'int' 1
// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, type-parameter-0-1, 1>' dependent __make_integer_seq
// CHECK-NEXT: |-TemplateArgument template A
// CHECK-NEXT: |-TemplateArgument type 'type-parameter-0-1'
// CHECK-NEXT: | `-TemplateTypeParmType 0x{{[0-9A-Fa-f]+}} 'type-parameter-0-1' dependent depth 0 index 1
// CHECK-NEXT: `-TemplateArgument expr
// CHECK-NEXT: `-ImplicitCastExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'type-parameter-0-1':'type-parameter-0-1' <Dependent>
// CHECK-NEXT: `-IntegerLiteral 0x{{[0-9A-Fa-f]+}} <col:42> 'int' 1
using test5 = __make_integer_seq<A, int, N>;
// CHECK: `-TypeAliasDecl 0x{{[0-9A-Fa-f]+}} <line:103:3, col:45> col:9 test5 '__make_integer_seq<A, int, N>':'__make_integer_seq<A, int, N>'
// CHECK-NEXT: `-ElaboratedType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, int, N>' sugar dependent
// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, int, N>' sugar dependent alias __make_integer_seq
// CHECK-NEXT: |-TemplateArgument template A
// CHECK-NEXT: |-TemplateArgument type 'int'
// CHECK-NEXT: | `-BuiltinType 0x{{[0-9A-Fa-f]+}} 'int'
// CHECK-NEXT: |-TemplateArgument expr
// CHECK-NEXT: | `-DeclRefExpr 0x{{[0-9A-Fa-f]+}} <col:44> 'int' NonTypeTemplateParm 0x{{[0-9A-Fa-f]+}} 'N' 'int'
// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, int, N>' dependent __make_integer_seq
// CHECK-NEXT: |-TemplateArgument template A
// CHECK-NEXT: |-TemplateArgument type 'int'
// CHECK-NEXT: | `-BuiltinType 0x{{[0-9A-Fa-f]+}} 'int'
// CHECK-NEXT: `-TemplateArgument expr
// CHECK-NEXT: `-DeclRefExpr 0x{{[0-9A-Fa-f]+}} <col:44> 'int' NonTypeTemplateParm 0x{{[0-9A-Fa-f]+}} 'N' 'int'
};
// expected-no-diagnostics
template <class T, class S> struct D;
template <class T> struct D<T, __make_integer_seq<A, int, sizeof(T)>> {};
template struct D<char, A<int, 0>>;
template <class T, class S> struct E;
template <class T> struct E<T, __make_integer_seq<A, T, 2>> {};
template struct E<short, A<short, 0, 1>>;
template <template <class A1, A1... A2> class T, class S> struct F;
template <template <class A1, A1... A2> class T> struct F<T, __make_integer_seq<T, long, 3>> {};
template struct F<A, A<long, 0, 1, 2>>;
template <class T> struct G;
template <class T> struct G<__make_integer_seq<A, T, 1>> {};
template <class T> struct G<__make_integer_seq<A, T, 1U>> {};
template <int S, class = __make_integer_seq<A, int, S>> struct H;
template <int S, int... Is> struct H<S, A<int, Is...>> { };
template <int S> void h(H<S>);
void test_h() { h(H<5>{}); }
Reference in New Issue View Git Blame Copy Permalink