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carbon-lang
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toolchain
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check
/
testdata
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named_constraint
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empty.carbon

empty.carbon 12 KB
История Исходник

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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/none.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/named_constraint/empty.carbon
    10. 

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

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

  12. 

  13. constraint Empty {}
    14. 

  14. 

  15. // No constraints, so it matches any type, but you can't do anything with it.
    16. 

  16. // Like `type`.
    17. 

  17. //
    18. 

  18. //@dump-sem-ir-begin
    19. 

  19. fn F(T:! Empty) {}
    20. 

  20. //@dump-sem-ir-end
    21. 

  21. 

  22. interface Z {}
    23. 

  23. 

  24. //@dump-sem-ir-begin
    25. 

  25. fn G(T:! Z, U:! type, V:! Empty) {
    26. 

  26.   F({});
    27. 

  27.   F(type);
    28. 

  28.   F(T);
    29. 

  29.   F(U);
    30. 

  30.   F(V);
    31. 

  31. }
    32. 

  32. //@dump-sem-ir-end
    33. 

  33. 

  34. // CHECK:STDOUT: --- empty.carbon
    35. 

  35. // CHECK:STDOUT:
    36. 

  36. // CHECK:STDOUT: constants {
    37. 

  37. // CHECK:STDOUT:   %Empty.type: type = facet_type <@Empty> [concrete]
    38. 

  38. // CHECK:STDOUT:   %T.861: %Empty.type = symbolic_binding T, 0 [symbolic]
    39. 

  39. // CHECK:STDOUT:   %pattern_type.e25: type = pattern_type %Empty.type [concrete]
    40. 

  40. // CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
    41. 

  41. // CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
    42. 

  42. // CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
    43. 

  43. // CHECK:STDOUT:   %Z.type: type = facet_type <@Z> [concrete]
    44. 

  44. // CHECK:STDOUT:   %T.3b3: %Z.type = symbolic_binding T, 0 [symbolic]
    45. 

  45. // CHECK:STDOUT:   %pattern_type.4a0: type = pattern_type %Z.type [concrete]
    46. 

  46. // CHECK:STDOUT:   %U: type = symbolic_binding U, 1 [symbolic]
    47. 

  47. // CHECK:STDOUT:   %pattern_type.98f: type = pattern_type type [concrete]
    48. 

  48. // CHECK:STDOUT:   %V: %Empty.type = symbolic_binding V, 2 [symbolic]
    49. 

  49. // CHECK:STDOUT:   %G.type: type = fn_type @G [concrete]
    50. 

  50. // CHECK:STDOUT:   %G: %G.type = struct_value () [concrete]
    51. 

  51. // CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
    52. 

  52. // CHECK:STDOUT:   %empty_struct: %empty_struct_type = struct_value () [concrete]
    53. 

  53. // CHECK:STDOUT:   %Empty.facet.6fa: %Empty.type = facet_value %empty_struct_type, () [concrete]
    54. 

  54. // CHECK:STDOUT:   %F.specific_fn.007: <specific function> = specific_function %F, @F(%Empty.facet.6fa) [concrete]
    55. 

  55. // CHECK:STDOUT:   %Empty.facet.832: %Empty.type = facet_value type, () [concrete]
    56. 

  56. // CHECK:STDOUT:   %F.specific_fn.7db: <specific function> = specific_function %F, @F(%Empty.facet.832) [concrete]
    57. 

  57. // CHECK:STDOUT:   %T.binding.as_type: type = symbolic_binding_type T, 0, %T.3b3 [symbolic]
    58. 

  58. // CHECK:STDOUT:   %Empty.facet.146: %Empty.type = facet_value %T.binding.as_type, () [symbolic]
    59. 

  59. // CHECK:STDOUT:   %F.specific_fn.2bd: <specific function> = specific_function %F, @F(%Empty.facet.146) [symbolic]
    60. 

  60. // CHECK:STDOUT:   %Empty.facet.a70: %Empty.type = facet_value %U, () [symbolic]
    61. 

  61. // CHECK:STDOUT:   %F.specific_fn.1c5: <specific function> = specific_function %F, @F(%Empty.facet.a70) [symbolic]
    62. 

  62. // CHECK:STDOUT:   %F.specific_fn.f38: <specific function> = specific_function %F, @F(%V) [symbolic]
    63. 

  63. // CHECK:STDOUT: }
    64. 

  64. // CHECK:STDOUT:
    65. 

  65. // CHECK:STDOUT: file {
    66. 

  66. // CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {
    67. 

  67. // CHECK:STDOUT:     %T.patt: %pattern_type.e25 = symbolic_binding_pattern T, 0 [concrete]
    68. 

  68. // CHECK:STDOUT:   } {
    69. 

  69. // CHECK:STDOUT:     %.loc19: type = splice_block %Empty.ref [concrete = constants.%Empty.type] {
    70. 

  70. // CHECK:STDOUT:       <elided>
    71. 

  71. // CHECK:STDOUT:       %Empty.ref: type = name_ref Empty, file.%Empty.decl [concrete = constants.%Empty.type]
    72. 

  72. // CHECK:STDOUT:     }
    73. 

  73. // CHECK:STDOUT:     %T.loc19_6.2: %Empty.type = symbolic_binding T, 0 [symbolic = %T.loc19_6.1 (constants.%T.861)]
    74. 

  74. // CHECK:STDOUT:   }
    75. 

  75. // CHECK:STDOUT:   %G.decl: %G.type = fn_decl @G [concrete = constants.%G] {
    76. 

  76. // CHECK:STDOUT:     %T.patt: %pattern_type.4a0 = symbolic_binding_pattern T, 0 [concrete]
    77. 

  77. // CHECK:STDOUT:     %U.patt: %pattern_type.98f = symbolic_binding_pattern U, 1 [concrete]
    78. 

  78. // CHECK:STDOUT:     %V.patt: %pattern_type.e25 = symbolic_binding_pattern V, 2 [concrete]
    79. 

  79. // CHECK:STDOUT:   } {
    80. 

  80. // CHECK:STDOUT:     %.loc25_10: type = splice_block %Z.ref [concrete = constants.%Z.type] {
    81. 

  81. // CHECK:STDOUT:       <elided>
    82. 

  82. // CHECK:STDOUT:       %Z.ref: type = name_ref Z, file.%Z.decl [concrete = constants.%Z.type]
    83. 

  83. // CHECK:STDOUT:     }
    84. 

  84. // CHECK:STDOUT:     %T.loc25_6.2: %Z.type = symbolic_binding T, 0 [symbolic = %T.loc25_6.1 (constants.%T.3b3)]
    85. 

  85. // CHECK:STDOUT:     <elided>
    86. 

  86. // CHECK:STDOUT:     %U.loc25_13.2: type = symbolic_binding U, 1 [symbolic = %U.loc25_13.1 (constants.%U)]
    87. 

  87. // CHECK:STDOUT:     %.loc25_27: type = splice_block %Empty.ref [concrete = constants.%Empty.type] {
    88. 

  88. // CHECK:STDOUT:       <elided>
    89. 

  89. // CHECK:STDOUT:       %Empty.ref: type = name_ref Empty, file.%Empty.decl [concrete = constants.%Empty.type]
    90. 

  90. // CHECK:STDOUT:     }
    91. 

  91. // CHECK:STDOUT:     %V.loc25_23.2: %Empty.type = symbolic_binding V, 2 [symbolic = %V.loc25_23.1 (constants.%V)]
    92. 

  92. // CHECK:STDOUT:   }
    93. 

  93. // CHECK:STDOUT: }
    94. 

  94. // CHECK:STDOUT:
    95. 

  95. // CHECK:STDOUT: generic fn @F(%T.loc19_6.2: %Empty.type) {
    96. 

  96. // CHECK:STDOUT:   %T.loc19_6.1: %Empty.type = symbolic_binding T, 0 [symbolic = %T.loc19_6.1 (constants.%T.861)]
    97. 

  97. // CHECK:STDOUT:
    98. 

  98. // CHECK:STDOUT: !definition:
    99. 

  99. // CHECK:STDOUT:
    100. 

  100. // CHECK:STDOUT:   fn() {
    101. 

  101. // CHECK:STDOUT:   !entry:
    102. 

  102. // CHECK:STDOUT:     return
    103. 

  103. // CHECK:STDOUT:   }
    104. 

  104. // CHECK:STDOUT: }
    105. 

  105. // CHECK:STDOUT:
    106. 

  106. // CHECK:STDOUT: generic fn @G(%T.loc25_6.2: %Z.type, %U.loc25_13.2: type, %V.loc25_23.2: %Empty.type) {
    107. 

  107. // CHECK:STDOUT:   %T.loc25_6.1: %Z.type = symbolic_binding T, 0 [symbolic = %T.loc25_6.1 (constants.%T.3b3)]
    108. 

  108. // CHECK:STDOUT:   %U.loc25_13.1: type = symbolic_binding U, 1 [symbolic = %U.loc25_13.1 (constants.%U)]
    109. 

  109. // CHECK:STDOUT:   %V.loc25_23.1: %Empty.type = symbolic_binding V, 2 [symbolic = %V.loc25_23.1 (constants.%V)]
    110. 

  110. // CHECK:STDOUT:
    111. 

  111. // CHECK:STDOUT: !definition:
    112. 

  112. // CHECK:STDOUT:   %T.binding.as_type: type = symbolic_binding_type T, 0, %T.loc25_6.1 [symbolic = %T.binding.as_type (constants.%T.binding.as_type)]
    113. 

  113. // CHECK:STDOUT:   %Empty.facet.loc28_6.2: %Empty.type = facet_value %T.binding.as_type, () [symbolic = %Empty.facet.loc28_6.2 (constants.%Empty.facet.146)]
    114. 

  114. // CHECK:STDOUT:   %F.specific_fn.loc28_3.2: <specific function> = specific_function constants.%F, @F(%Empty.facet.loc28_6.2) [symbolic = %F.specific_fn.loc28_3.2 (constants.%F.specific_fn.2bd)]
    115. 

  115. // CHECK:STDOUT:   %Empty.facet.loc29_6.2: %Empty.type = facet_value %U.loc25_13.1, () [symbolic = %Empty.facet.loc29_6.2 (constants.%Empty.facet.a70)]
    116. 

  116. // CHECK:STDOUT:   %F.specific_fn.loc29_3.2: <specific function> = specific_function constants.%F, @F(%Empty.facet.loc29_6.2) [symbolic = %F.specific_fn.loc29_3.2 (constants.%F.specific_fn.1c5)]
    117. 

  117. // CHECK:STDOUT:   %F.specific_fn.loc30_3.2: <specific function> = specific_function constants.%F, @F(%V.loc25_23.1) [symbolic = %F.specific_fn.loc30_3.2 (constants.%F.specific_fn.f38)]
    118. 

  118. // CHECK:STDOUT:
    119. 

  119. // CHECK:STDOUT:   fn() {
    120. 

  120. // CHECK:STDOUT:   !entry:
    121. 

  121. // CHECK:STDOUT:     %F.ref.loc26: %F.type = name_ref F, file.%F.decl [concrete = constants.%F]
    122. 

  122. // CHECK:STDOUT:     %.loc26_6: %empty_struct_type = struct_literal () [concrete = constants.%empty_struct]
    123. 

  123. // CHECK:STDOUT:     %Empty.facet.loc26: %Empty.type = facet_value constants.%empty_struct_type, () [concrete = constants.%Empty.facet.6fa]
    124. 

  124. // CHECK:STDOUT:     %.loc26_7: %Empty.type = converted %.loc26_6, %Empty.facet.loc26 [concrete = constants.%Empty.facet.6fa]
    125. 

  125. // CHECK:STDOUT:     %F.specific_fn.loc26: <specific function> = specific_function %F.ref.loc26, @F(constants.%Empty.facet.6fa) [concrete = constants.%F.specific_fn.007]
    126. 

  126. // CHECK:STDOUT:     %F.call.loc26: init %empty_tuple.type = call %F.specific_fn.loc26()
    127. 

  127. // CHECK:STDOUT:     %F.ref.loc27: %F.type = name_ref F, file.%F.decl [concrete = constants.%F]
    128. 

  128. // CHECK:STDOUT:     %Empty.facet.loc27: %Empty.type = facet_value type, () [concrete = constants.%Empty.facet.832]
    129. 

  129. // CHECK:STDOUT:     %.loc27: %Empty.type = converted type, %Empty.facet.loc27 [concrete = constants.%Empty.facet.832]
    130. 

  130. // CHECK:STDOUT:     %F.specific_fn.loc27: <specific function> = specific_function %F.ref.loc27, @F(constants.%Empty.facet.832) [concrete = constants.%F.specific_fn.7db]
    131. 

  131. // CHECK:STDOUT:     %F.call.loc27: init %empty_tuple.type = call %F.specific_fn.loc27()
    132. 

  132. // CHECK:STDOUT:     %F.ref.loc28: %F.type = name_ref F, file.%F.decl [concrete = constants.%F]
    133. 

  133. // CHECK:STDOUT:     %T.ref: %Z.type = name_ref T, %T.loc25_6.2 [symbolic = %T.loc25_6.1 (constants.%T.3b3)]
    134. 

  134. // CHECK:STDOUT:     %T.as_type: type = facet_access_type %T.ref [symbolic = %T.binding.as_type (constants.%T.binding.as_type)]
    135. 

  135. // CHECK:STDOUT:     %Empty.facet.loc28_6.1: %Empty.type = facet_value %T.as_type, () [symbolic = %Empty.facet.loc28_6.2 (constants.%Empty.facet.146)]
    136. 

  136. // CHECK:STDOUT:     %.loc28: %Empty.type = converted %T.ref, %Empty.facet.loc28_6.1 [symbolic = %Empty.facet.loc28_6.2 (constants.%Empty.facet.146)]
    137. 

  137. // CHECK:STDOUT:     %F.specific_fn.loc28_3.1: <specific function> = specific_function %F.ref.loc28, @F(constants.%Empty.facet.146) [symbolic = %F.specific_fn.loc28_3.2 (constants.%F.specific_fn.2bd)]
    138. 

  138. // CHECK:STDOUT:     %F.call.loc28: init %empty_tuple.type = call %F.specific_fn.loc28_3.1()
    139. 

  139. // CHECK:STDOUT:     %F.ref.loc29: %F.type = name_ref F, file.%F.decl [concrete = constants.%F]
    140. 

  140. // CHECK:STDOUT:     %U.ref: type = name_ref U, %U.loc25_13.2 [symbolic = %U.loc25_13.1 (constants.%U)]
    141. 

  141. // CHECK:STDOUT:     %Empty.facet.loc29_6.1: %Empty.type = facet_value %U.ref, () [symbolic = %Empty.facet.loc29_6.2 (constants.%Empty.facet.a70)]
    142. 

  142. // CHECK:STDOUT:     %.loc29: %Empty.type = converted %U.ref, %Empty.facet.loc29_6.1 [symbolic = %Empty.facet.loc29_6.2 (constants.%Empty.facet.a70)]
    143. 

  143. // CHECK:STDOUT:     %F.specific_fn.loc29_3.1: <specific function> = specific_function %F.ref.loc29, @F(constants.%Empty.facet.a70) [symbolic = %F.specific_fn.loc29_3.2 (constants.%F.specific_fn.1c5)]
    144. 

  144. // CHECK:STDOUT:     %F.call.loc29: init %empty_tuple.type = call %F.specific_fn.loc29_3.1()
    145. 

  145. // CHECK:STDOUT:     %F.ref.loc30: %F.type = name_ref F, file.%F.decl [concrete = constants.%F]
    146. 

  146. // CHECK:STDOUT:     %V.ref: %Empty.type = name_ref V, %V.loc25_23.2 [symbolic = %V.loc25_23.1 (constants.%V)]
    147. 

  147. // CHECK:STDOUT:     %F.specific_fn.loc30_3.1: <specific function> = specific_function %F.ref.loc30, @F(constants.%V) [symbolic = %F.specific_fn.loc30_3.2 (constants.%F.specific_fn.f38)]
    148. 

  148. // CHECK:STDOUT:     %F.call.loc30: init %empty_tuple.type = call %F.specific_fn.loc30_3.1()
    149. 

  149. // CHECK:STDOUT:     return
    150. 

  150. // CHECK:STDOUT:   }
    151. 

  151. // CHECK:STDOUT: }
    152. 

  152. // CHECK:STDOUT:
    153. 

  153. // CHECK:STDOUT: specific @F(constants.%T.861) {
    154. 

  154. // CHECK:STDOUT:   %T.loc19_6.1 => constants.%T.861
    155. 

  155. // CHECK:STDOUT: }
    156. 

  156. // CHECK:STDOUT:
    157. 

  157. // CHECK:STDOUT: specific @G(constants.%T.3b3, constants.%U, constants.%V) {
    158. 

  158. // CHECK:STDOUT:   %T.loc25_6.1 => constants.%T.3b3
    159. 

  159. // CHECK:STDOUT:   %U.loc25_13.1 => constants.%U
    160. 

  160. // CHECK:STDOUT:   %V.loc25_23.1 => constants.%V
    161. 

  161. // CHECK:STDOUT: }
    162. 

  162. // CHECK:STDOUT:
    163. 

  163. // CHECK:STDOUT: specific @F(constants.%Empty.facet.6fa) {
    164. 

  164. // CHECK:STDOUT:   %T.loc19_6.1 => constants.%Empty.facet.6fa
    165. 

  165. // CHECK:STDOUT:
    166. 

  166. // CHECK:STDOUT: !definition:
    167. 

  167. // CHECK:STDOUT: }
    168. 

  168. // CHECK:STDOUT:
    169. 

  169. // CHECK:STDOUT: specific @F(constants.%Empty.facet.832) {
    170. 

  170. // CHECK:STDOUT:   %T.loc19_6.1 => constants.%Empty.facet.832
    171. 

  171. // CHECK:STDOUT:
    172. 

  172. // CHECK:STDOUT: !definition:
    173. 

  173. // CHECK:STDOUT: }
    174. 

  174. // CHECK:STDOUT:
    175. 

  175. // CHECK:STDOUT: specific @F(constants.%Empty.facet.146) {
    176. 

  176. // CHECK:STDOUT:   %T.loc19_6.1 => constants.%Empty.facet.146
    177. 

  177. // CHECK:STDOUT:
    178. 

  178. // CHECK:STDOUT: !definition:
    179. 

  179. // CHECK:STDOUT: }
    180. 

  180. // CHECK:STDOUT:
    181. 

  181. // CHECK:STDOUT: specific @F(constants.%Empty.facet.a70) {
    182. 

  182. // CHECK:STDOUT:   %T.loc19_6.1 => constants.%Empty.facet.a70
    183. 

  183. // CHECK:STDOUT:
    184. 

  184. // CHECK:STDOUT: !definition:
    185. 

  185. // CHECK:STDOUT: }
    186. 

  186. // CHECK:STDOUT:
    187. 

  187. // CHECK:STDOUT: specific @F(constants.%V) {
    188. 

  188. // CHECK:STDOUT:   %T.loc19_6.1 => constants.%V
    189. 

  189. // CHECK:STDOUT:
    190. 

  190. // CHECK:STDOUT: !definition:
    191. 

  191. // CHECK:STDOUT: }
    192. 

  192. // CHECK:STDOUT:
    193.