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convert_qualifiers.carbon

convert_qualifiers.carbon 9.9 KB
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  1. // Part of the Carbon Language project, under the Apache License v2.0 with LLVM
    2. 

  2. // Exceptions. See /LICENSE for license information.
    3. 

  3. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
    4. 

  4. //
    5. 

  5. // INCLUDE-FILE: toolchain/testing/testdata/min_prelude/int.carbon
    6. 

  6. //
    7. 

  7. // AUTOUPDATE
    8. 

  8. // TIP: To test this file alone, run:
    9. 

  9. // TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/pointer/convert_qualifiers.carbon
    10. 

  10. // TIP: To dump output, run:
    11. 

  11. // TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/pointer/convert_qualifiers.carbon
    12. 

  12. 

  13. // --- same_or_added_qualifiers.carbon
    14. 

  14. 

  15. library "[[@TEST_NAME]]";
    16. 

  16. 

  17. class X {}
    18. 

  18. 

  19. fn TakeConst(p: const X*);
    20. 

  20. fn TakeNonConst(p: X*);
    21. 

  21. 

  22. fn NonConst(p: X*) {
    23. 

  23.   //@dump-sem-ir-begin
    24. 

  24.   TakeNonConst(p);
    25. 

  25.   TakeConst(p);
    26. 

  26.   //@dump-sem-ir-end
    27. 

  27. }
    28. 

  28. fn Const(p: const X*) {
    29. 

  29.   //@dump-sem-ir-begin
    30. 

  30.   TakeConst(p);
    31. 

  31.   //@dump-sem-ir-end
    32. 

  32. }
    33. 

  33. 

  34. // Same thing, but the pointee type happens to be a pointer.
    35. 

  35. fn TakeConstConst(p: const (const X*)*);
    36. 

  36. fn NonConstConst(p: const X**) {
    37. 

  37.   //@dump-sem-ir-begin
    38. 

  38.   TakeConstConst(p);
    39. 

  39.   //@dump-sem-ir-end
    40. 

  40. }
    41. 

  41. 

  42. // --- fail_removed_qualifiers.carbon
    43. 

  43. 

  44. library "[[@TEST_NAME]]";
    45. 

  45. 

  46. class X {}
    47. 

  47. 

  48. fn TakeNonConst(p: X*);
    49. 

  49. 

  50. // CHECK:STDERR: fail_removed_qualifiers.carbon:[[@LINE+10]]:38: error: cannot implicitly convert expression of type `const X*` to `X*` [ConversionFailure]
    51. 

  51. // CHECK:STDERR: fn Const(p: const X*) { TakeNonConst(p); }
    52. 

  52. // CHECK:STDERR:                                      ^
    53. 

  53. // CHECK:STDERR: fail_removed_qualifiers.carbon:[[@LINE+7]]:38: note: type `const X*` does not implement interface `Core.ImplicitAs(X*)` [MissingImplInMemberAccessInContext]
    54. 

  54. // CHECK:STDERR: fn Const(p: const X*) { TakeNonConst(p); }
    55. 

  55. // CHECK:STDERR:                                      ^
    56. 

  56. // CHECK:STDERR: fail_removed_qualifiers.carbon:[[@LINE-8]]:17: note: initializing function parameter [InCallToFunctionParam]
    57. 

  57. // CHECK:STDERR: fn TakeNonConst(p: X*);
    58. 

  58. // CHECK:STDERR:                 ^~~~~
    59. 

  59. // CHECK:STDERR:
    60. 

  60. fn Const(p: const X*) { TakeNonConst(p); }
    61. 

  61. 

  62. // --- fail_todo_nested_qualifiers.carbon
    63. 

  63. 

  64. library "[[@TEST_NAME]]";
    65. 

  65. 

  66. class X {}
    67. 

  67. 

  68. fn TakeConstConst(p: const (const X*)*);
    69. 

  69. 

  70. // TODO: We should allow these conversions.
    71. 

  71. 

  72. fn NonConstNonConst(p: X**) {
    73. 

  73.   //@dump-sem-ir-begin
    74. 

  74.   // CHECK:STDERR: fail_todo_nested_qualifiers.carbon:[[@LINE+10]]:18: error: cannot implicitly convert expression of type `X**` to `const (const X*)*` [ConversionFailure]
    75. 

  75.   // CHECK:STDERR:   TakeConstConst(p);
    76. 

  76.   // CHECK:STDERR:                  ^
    77. 

  77.   // CHECK:STDERR: fail_todo_nested_qualifiers.carbon:[[@LINE+7]]:18: note: type `X**` does not implement interface `Core.ImplicitAs(const (const X*)*)` [MissingImplInMemberAccessInContext]
    78. 

  78.   // CHECK:STDERR:   TakeConstConst(p);
    79. 

  79.   // CHECK:STDERR:                  ^
    80. 

  80.   // CHECK:STDERR: fail_todo_nested_qualifiers.carbon:[[@LINE-12]]:19: note: initializing function parameter [InCallToFunctionParam]
    81. 

  81.   // CHECK:STDERR: fn TakeConstConst(p: const (const X*)*);
    82. 

  82.   // CHECK:STDERR:                   ^~~~~~~~~~~~~~~~~~~~
    83. 

  83.   // CHECK:STDERR:
    84. 

  84.   TakeConstConst(p);
    85. 

  85.   //@dump-sem-ir-end
    86. 

  86. }
    87. 

  87. 

  88. fn ConstNonConst(p: const (X*)*) {
    89. 

  89.   //@dump-sem-ir-begin
    90. 

  90.   // CHECK:STDERR: fail_todo_nested_qualifiers.carbon:[[@LINE+10]]:18: error: cannot implicitly convert expression of type `const (X*)*` to `const (const X*)*` [ConversionFailure]
    91. 

  91.   // CHECK:STDERR:   TakeConstConst(p);
    92. 

  92.   // CHECK:STDERR:                  ^
    93. 

  93.   // CHECK:STDERR: fail_todo_nested_qualifiers.carbon:[[@LINE+7]]:18: note: type `const (X*)*` does not implement interface `Core.ImplicitAs(const (const X*)*)` [MissingImplInMemberAccessInContext]
    94. 

  94.   // CHECK:STDERR:   TakeConstConst(p);
    95. 

  95.   // CHECK:STDERR:                  ^
    96. 

  96.   // CHECK:STDERR: fail_todo_nested_qualifiers.carbon:[[@LINE-28]]:19: note: initializing function parameter [InCallToFunctionParam]
    97. 

  97.   // CHECK:STDERR: fn TakeConstConst(p: const (const X*)*);
    98. 

  98.   // CHECK:STDERR:                   ^~~~~~~~~~~~~~~~~~~~
    99. 

  99.   // CHECK:STDERR:
    100. 

  100.   TakeConstConst(p);
    101. 

  101.   //@dump-sem-ir-end
    102. 

  102. }
    103. 

  103. 

  104. // --- fail_nested_added_qualifiers.carbon
    105. 

  105. 

  106. library "[[@TEST_NAME]]";
    107. 

  107. 

  108. class X {}
    109. 

  109. 

  110. fn TakeNonConstConst(p: (const X*)*);
    111. 

  111. 

  112. // CHECK:STDERR: fail_nested_added_qualifiers.carbon:[[@LINE+10]]:49: error: cannot implicitly convert expression of type `X**` to `const X**` [ConversionFailure]
    113. 

  113. // CHECK:STDERR: fn NonConstNonConst(p: X**) { TakeNonConstConst(p); }
    114. 

  114. // CHECK:STDERR:                                                 ^
    115. 

  115. // CHECK:STDERR: fail_nested_added_qualifiers.carbon:[[@LINE+7]]:49: note: type `X**` does not implement interface `Core.ImplicitAs(const X**)` [MissingImplInMemberAccessInContext]
    116. 

  116. // CHECK:STDERR: fn NonConstNonConst(p: X**) { TakeNonConstConst(p); }
    117. 

  117. // CHECK:STDERR:                                                 ^
    118. 

  118. // CHECK:STDERR: fail_nested_added_qualifiers.carbon:[[@LINE-8]]:22: note: initializing function parameter [InCallToFunctionParam]
    119. 

  119. // CHECK:STDERR: fn TakeNonConstConst(p: (const X*)*);
    120. 

  120. // CHECK:STDERR:                      ^~~~~~~~~~~~~~
    121. 

  121. // CHECK:STDERR:
    122. 

  122. fn NonConstNonConst(p: X**) { TakeNonConstConst(p); }
    123. 

  123. 

  124. // CHECK:STDOUT: --- same_or_added_qualifiers.carbon
    125. 

  125. // CHECK:STDOUT:
    126. 

  126. // CHECK:STDOUT: constants {
    127. 

  127. // CHECK:STDOUT:   %X: type = class_type @X [concrete]
    128. 

  128. // CHECK:STDOUT:   %const.9ff: type = const_type %X [concrete]
    129. 

  129. // CHECK:STDOUT:   %ptr.d4c: type = ptr_type %const.9ff [concrete]
    130. 

  130. // CHECK:STDOUT:   %TakeConst.type: type = fn_type @TakeConst [concrete]
    131. 

  131. // CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
    132. 

  132. // CHECK:STDOUT:   %TakeConst: %TakeConst.type = struct_value () [concrete]
    133. 

  133. // CHECK:STDOUT:   %ptr.2a9: type = ptr_type %X [concrete]
    134. 

  134. // CHECK:STDOUT:   %TakeNonConst.type: type = fn_type @TakeNonConst [concrete]
    135. 

  135. // CHECK:STDOUT:   %TakeNonConst: %TakeNonConst.type = struct_value () [concrete]
    136. 

  136. // CHECK:STDOUT:   %const.1ce: type = const_type %ptr.d4c [concrete]
    137. 

  137. // CHECK:STDOUT:   %ptr.a2c: type = ptr_type %const.1ce [concrete]
    138. 

  138. // CHECK:STDOUT:   %TakeConstConst.type: type = fn_type @TakeConstConst [concrete]
    139. 

  139. // CHECK:STDOUT:   %TakeConstConst: %TakeConstConst.type = struct_value () [concrete]
    140. 

  140. // CHECK:STDOUT:   %ptr.0ab: type = ptr_type %ptr.d4c [concrete]
    141. 

  141. // CHECK:STDOUT: }
    142. 

  142. // CHECK:STDOUT:
    143. 

  143. // CHECK:STDOUT: fn @NonConst(%p.param: %ptr.2a9) {
    144. 

  144. // CHECK:STDOUT: !entry:
    145. 

  145. // CHECK:STDOUT:   %TakeNonConst.ref: %TakeNonConst.type = name_ref TakeNonConst, file.%TakeNonConst.decl [concrete = constants.%TakeNonConst]
    146. 

  146. // CHECK:STDOUT:   %p.ref.loc11: %ptr.2a9 = name_ref p, %p
    147. 

  147. // CHECK:STDOUT:   %TakeNonConst.call: init %empty_tuple.type = call %TakeNonConst.ref(%p.ref.loc11)
    148. 

  148. // CHECK:STDOUT:   %TakeConst.ref: %TakeConst.type = name_ref TakeConst, file.%TakeConst.decl [concrete = constants.%TakeConst]
    149. 

  149. // CHECK:STDOUT:   %p.ref.loc12: %ptr.2a9 = name_ref p, %p
    150. 

  150. // CHECK:STDOUT:   %.loc12_13.1: %ptr.d4c = as_compatible %p.ref.loc12
    151. 

  151. // CHECK:STDOUT:   %.loc12_13.2: %ptr.d4c = converted %p.ref.loc12, %.loc12_13.1
    152. 

  152. // CHECK:STDOUT:   %TakeConst.call: init %empty_tuple.type = call %TakeConst.ref(%.loc12_13.2)
    153. 

  153. // CHECK:STDOUT:   <elided>
    154. 

  154. // CHECK:STDOUT: }
    155. 

  155. // CHECK:STDOUT:
    156. 

  156. // CHECK:STDOUT: fn @Const(%p.param: %ptr.d4c) {
    157. 

  157. // CHECK:STDOUT: !entry:
    158. 

  158. // CHECK:STDOUT:   %TakeConst.ref: %TakeConst.type = name_ref TakeConst, file.%TakeConst.decl [concrete = constants.%TakeConst]
    159. 

  159. // CHECK:STDOUT:   %p.ref: %ptr.d4c = name_ref p, %p
    160. 

  160. // CHECK:STDOUT:   %TakeConst.call: init %empty_tuple.type = call %TakeConst.ref(%p.ref)
    161. 

  161. // CHECK:STDOUT:   <elided>
    162. 

  162. // CHECK:STDOUT: }
    163. 

  163. // CHECK:STDOUT:
    164. 

  164. // CHECK:STDOUT: fn @NonConstConst(%p.param: %ptr.0ab) {
    165. 

  165. // CHECK:STDOUT: !entry:
    166. 

  166. // CHECK:STDOUT:   %TakeConstConst.ref: %TakeConstConst.type = name_ref TakeConstConst, file.%TakeConstConst.decl [concrete = constants.%TakeConstConst]
    167. 

  167. // CHECK:STDOUT:   %p.ref: %ptr.0ab = name_ref p, %p
    168. 

  168. // CHECK:STDOUT:   %.loc25_18.1: %ptr.a2c = as_compatible %p.ref
    169. 

  169. // CHECK:STDOUT:   %.loc25_18.2: %ptr.a2c = converted %p.ref, %.loc25_18.1
    170. 

  170. // CHECK:STDOUT:   %TakeConstConst.call: init %empty_tuple.type = call %TakeConstConst.ref(%.loc25_18.2)
    171. 

  171. // CHECK:STDOUT:   <elided>
    172. 

  172. // CHECK:STDOUT: }
    173. 

  173. // CHECK:STDOUT:
    174. 

  174. // CHECK:STDOUT: --- fail_todo_nested_qualifiers.carbon
    175. 

  175. // CHECK:STDOUT:
    176. 

  176. // CHECK:STDOUT: constants {
    177. 

  177. // CHECK:STDOUT:   %X: type = class_type @X [concrete]
    178. 

  178. // CHECK:STDOUT:   %const.9ff: type = const_type %X [concrete]
    179. 

  179. // CHECK:STDOUT:   %ptr.d4c: type = ptr_type %const.9ff [concrete]
    180. 

  180. // CHECK:STDOUT:   %const.1ce: type = const_type %ptr.d4c [concrete]
    181. 

  181. // CHECK:STDOUT:   %ptr.a2c: type = ptr_type %const.1ce [concrete]
    182. 

  182. // CHECK:STDOUT:   %TakeConstConst.type: type = fn_type @TakeConstConst [concrete]
    183. 

  183. // CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
    184. 

  184. // CHECK:STDOUT:   %TakeConstConst: %TakeConstConst.type = struct_value () [concrete]
    185. 

  185. // CHECK:STDOUT:   %ptr.2a9: type = ptr_type %X [concrete]
    186. 

  186. // CHECK:STDOUT:   %ptr.8a5: type = ptr_type %ptr.2a9 [concrete]
    187. 

  187. // CHECK:STDOUT:   %const.cbb: type = const_type %ptr.2a9 [concrete]
    188. 

  188. // CHECK:STDOUT:   %ptr.e9d: type = ptr_type %const.cbb [concrete]
    189. 

  189. // CHECK:STDOUT: }
    190. 

  190. // CHECK:STDOUT:
    191. 

  191. // CHECK:STDOUT: fn @NonConstNonConst(%p.param: %ptr.8a5) {
    192. 

  192. // CHECK:STDOUT: !entry:
    193. 

  193. // CHECK:STDOUT:   %TakeConstConst.ref: %TakeConstConst.type = name_ref TakeConstConst, file.%TakeConstConst.decl [concrete = constants.%TakeConstConst]
    194. 

  194. // CHECK:STDOUT:   %p.ref: %ptr.8a5 = name_ref p, %p
    195. 

  195. // CHECK:STDOUT:   %.loc22: %ptr.a2c = converted %p.ref, <error> [concrete = <error>]
    196. 

  196. // CHECK:STDOUT:   %TakeConstConst.call: init %empty_tuple.type = call %TakeConstConst.ref(<error>)
    197. 

  197. // CHECK:STDOUT:   <elided>
    198. 

  198. // CHECK:STDOUT: }
    199. 

  199. // CHECK:STDOUT:
    200. 

  200. // CHECK:STDOUT: fn @ConstNonConst(%p.param: %ptr.e9d) {
    201. 

  201. // CHECK:STDOUT: !entry:
    202. 

  202. // CHECK:STDOUT:   %TakeConstConst.ref: %TakeConstConst.type = name_ref TakeConstConst, file.%TakeConstConst.decl [concrete = constants.%TakeConstConst]
    203. 

  203. // CHECK:STDOUT:   %p.ref: %ptr.e9d = name_ref p, %p
    204. 

  204. // CHECK:STDOUT:   %.loc38: %ptr.a2c = converted %p.ref, <error> [concrete = <error>]
    205. 

  205. // CHECK:STDOUT:   %TakeConstConst.call: init %empty_tuple.type = call %TakeConstConst.ref(<error>)
    206. 

  206. // CHECK:STDOUT:   <elided>
    207. 

  207. // CHECK:STDOUT: }
    208. 

  208. // CHECK:STDOUT:
    209.