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fail_partial_constant.carbon

fail_partial_constant.carbon 12 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/primitives.carbon
    6. 

  6. // TODO: Add ranges and switch to "--dump-sem-ir-ranges=only".
    7. 

  7. // EXTRA-ARGS: --dump-sem-ir-ranges=if-present
    8. 

  8. //
    9. 

  9. // AUTOUPDATE
    10. 

  10. // TIP: To test this file alone, run:
    11. 

  11. // TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/if_expr/fail_partial_constant.carbon
    12. 

  12. // TIP: To dump output, run:
    13. 

  13. // TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/if_expr/fail_partial_constant.carbon
    14. 

  14. 

  15. // --- fail_non_constant_condition.carbon
    16. 

  16. 

  17. package NonConstantCondition;
    18. 

  18. 

  19. fn ConditionIsNonConstant(b: bool) {
    20. 

  20.   // We choose to not accept this even if both arms evaluate to the same
    21. 

  21.   // constant value, because it notionally involves evaluating a non-constant
    22. 

  22.   // condition.
    23. 

  23.   // CHECK:STDERR: fail_non_constant_condition.carbon:[[@LINE+4]]:10: error: cannot evaluate type expression [TypeExprEvaluationFailure]
    24. 

  24.   // CHECK:STDERR:   var v: if b then i32 else i32 = 1;
    25. 

  25.   // CHECK:STDERR:          ^~~~~~~~~~~~~~~~~~~~~~
    26. 

  26.   // CHECK:STDERR:
    27. 

  27.   var v: if b then i32 else i32 = 1;
    28. 

  28. }
    29. 

  29. 

  30. // --- fail_non_constant_result.carbon
    31. 

  31. 

  32. package NonConstantResult;
    33. 

  33. 

  34. fn ChosenBranchIsNonConstant(t: type) {
    35. 

  35.   // CHECK:STDERR: fail_non_constant_result.carbon:[[@LINE+4]]:10: error: cannot evaluate type expression [TypeExprEvaluationFailure]
    36. 

  36.   // CHECK:STDERR:   var v: if true then t else i32 = 1;
    37. 

  37.   // CHECK:STDERR:          ^~~~~~~~~~~~~~~~~~~~~~~
    38. 

  38.   // CHECK:STDERR:
    39. 

  39.   var v: if true then t else i32 = 1;
    40. 

  40.   // CHECK:STDERR: fail_non_constant_result.carbon:[[@LINE+4]]:10: error: cannot evaluate type expression [TypeExprEvaluationFailure]
    41. 

  41.   // CHECK:STDERR:   var w: if false then i32 else t = 1;
    42. 

  42.   // CHECK:STDERR:          ^~~~~~~~~~~~~~~~~~~~~~~~
    43. 

  43.   // CHECK:STDERR:
    44. 

  44.   var w: if false then i32 else t = 1;
    45. 

  45. }
    46. 

  46. 

  47. // CHECK:STDOUT: --- fail_non_constant_condition.carbon
    48. 

  48. // CHECK:STDOUT:
    49. 

  49. // CHECK:STDOUT: constants {
    50. 

  50. // CHECK:STDOUT:   %Bool.type: type = fn_type @Bool [concrete]
    51. 

  51. // CHECK:STDOUT:   %Bool: %Bool.type = struct_value () [concrete]
    52. 

  52. // CHECK:STDOUT:   %pattern_type.831: type = pattern_type bool [concrete]
    53. 

  53. // CHECK:STDOUT:   %ConditionIsNonConstant.type: type = fn_type @ConditionIsNonConstant [concrete]
    54. 

  54. // CHECK:STDOUT:   %ConditionIsNonConstant: %ConditionIsNonConstant.type = struct_value () [concrete]
    55. 

  55. // CHECK:STDOUT:   %int_32: Core.IntLiteral = int_value 32 [concrete]
    56. 

  56. // CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
    57. 

  57. // CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
    58. 

  58. // CHECK:STDOUT:   %i32: type = class_type @Int, @Int(%int_32) [concrete]
    59. 

  59. // CHECK:STDOUT:   %int_1: Core.IntLiteral = int_value 1 [concrete]
    60. 

  60. // CHECK:STDOUT:   %Destroy.type: type = facet_type <@Destroy> [concrete]
    61. 

  61. // CHECK:STDOUT: }
    62. 

  62. // CHECK:STDOUT:
    63. 

  63. // CHECK:STDOUT: imports {
    64. 

  64. // CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
    65. 

  65. // CHECK:STDOUT:     .Bool = %Core.Bool
    66. 

  66. // CHECK:STDOUT:     .Int = %Core.Int
    67. 

  67. // CHECK:STDOUT:     .Destroy = %Core.Destroy
    68. 

  68. // CHECK:STDOUT:     import Core//prelude
    69. 

  69. // CHECK:STDOUT:     import Core//prelude/...
    70. 

  70. // CHECK:STDOUT:   }
    71. 

  71. // CHECK:STDOUT:   %Core.Bool: %Bool.type = import_ref Core//prelude/parts/bool, Bool, loaded [concrete = constants.%Bool]
    72. 

  72. // CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/parts/int, Int, loaded [concrete = constants.%Int.generic]
    73. 

  73. // CHECK:STDOUT:   %Core.Destroy: type = import_ref Core//prelude/parts/destroy, Destroy, loaded [concrete = constants.%Destroy.type]
    74. 

  74. // CHECK:STDOUT: }
    75. 

  75. // CHECK:STDOUT:
    76. 

  76. // CHECK:STDOUT: file {
    77. 

  77. // CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
    78. 

  78. // CHECK:STDOUT:     .Core = imports.%Core
    79. 

  79. // CHECK:STDOUT:     .ConditionIsNonConstant = %ConditionIsNonConstant.decl
    80. 

  80. // CHECK:STDOUT:   }
    81. 

  81. // CHECK:STDOUT:   %Core.import = import Core
    82. 

  82. // CHECK:STDOUT:   %ConditionIsNonConstant.decl: %ConditionIsNonConstant.type = fn_decl @ConditionIsNonConstant [concrete = constants.%ConditionIsNonConstant] {
    83. 

  83. // CHECK:STDOUT:     %b.patt: %pattern_type.831 = binding_pattern b [concrete]
    84. 

  84. // CHECK:STDOUT:     %b.param_patt: %pattern_type.831 = value_param_pattern %b.patt, call_param0 [concrete]
    85. 

  85. // CHECK:STDOUT:   } {
    86. 

  86. // CHECK:STDOUT:     %b.param: bool = value_param call_param0
    87. 

  87. // CHECK:STDOUT:     %.loc4_30.1: type = splice_block %.loc4_30.3 [concrete = bool] {
    88. 

  88. // CHECK:STDOUT:       %bool.make_type: init type = call constants.%Bool() [concrete = bool]
    89. 

  89. // CHECK:STDOUT:       %.loc4_30.2: type = value_of_initializer %bool.make_type [concrete = bool]
    90. 

  90. // CHECK:STDOUT:       %.loc4_30.3: type = converted %bool.make_type, %.loc4_30.2 [concrete = bool]
    91. 

  91. // CHECK:STDOUT:     }
    92. 

  92. // CHECK:STDOUT:     %b: bool = bind_name b, %b.param
    93. 

  93. // CHECK:STDOUT:   }
    94. 

  94. // CHECK:STDOUT: }
    95. 

  95. // CHECK:STDOUT:
    96. 

  96. // CHECK:STDOUT: fn @ConditionIsNonConstant(%b.param: bool) {
    97. 

  97. // CHECK:STDOUT: !entry:
    98. 

  98. // CHECK:STDOUT:   name_binding_decl {
    99. 

  99. // CHECK:STDOUT:     %v.patt: <error> = binding_pattern v [concrete]
    100. 

  100. // CHECK:STDOUT:     %v.var_patt: <error> = var_pattern %v.patt [concrete]
    101. 

  101. // CHECK:STDOUT:   }
    102. 

  102. // CHECK:STDOUT:   %v.var: ref <error> = var %v.var_patt [concrete = <error>]
    103. 

  103. // CHECK:STDOUT:   %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1]
    104. 

  104. // CHECK:STDOUT:   assign %v.var, <error>
    105. 

  105. // CHECK:STDOUT:   br !.loc12_13
    106. 

  106. // CHECK:STDOUT:
    107. 

  107. // CHECK:STDOUT: !.loc12_13:
    108. 

  108. // CHECK:STDOUT:   %b.ref: bool = name_ref b, %b
    109. 

  109. // CHECK:STDOUT:   if %b.ref br !if.expr.then else br !if.expr.else
    110. 

  110. // CHECK:STDOUT:
    111. 

  111. // CHECK:STDOUT: !if.expr.then:
    112. 

  112. // CHECK:STDOUT:   %int_32.loc12_20: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
    113. 

  113. // CHECK:STDOUT:   %i32.loc12_20: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
    114. 

  114. // CHECK:STDOUT:   br !if.expr.result(%i32.loc12_20)
    115. 

  115. // CHECK:STDOUT:
    116. 

  116. // CHECK:STDOUT: !if.expr.else:
    117. 

  117. // CHECK:STDOUT:   %int_32.loc12_29: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
    118. 

  118. // CHECK:STDOUT:   %i32.loc12_29: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
    119. 

  119. // CHECK:STDOUT:   br !if.expr.result(%i32.loc12_29)
    120. 

  120. // CHECK:STDOUT:
    121. 

  121. // CHECK:STDOUT: !if.expr.result:
    122. 

  122. // CHECK:STDOUT:   %.loc12: type = block_arg !if.expr.result
    123. 

  123. // CHECK:STDOUT:   br !.loc12_7
    124. 

  124. // CHECK:STDOUT:
    125. 

  125. // CHECK:STDOUT: !.loc12_7:
    126. 

  126. // CHECK:STDOUT:   %v: <error> = bind_name v, <error> [concrete = <error>]
    127. 

  127. // CHECK:STDOUT:   %impl.elem0: <error> = impl_witness_access <error>, element0 [concrete = <error>]
    128. 

  128. // CHECK:STDOUT:   return
    129. 

  129. // CHECK:STDOUT: }
    130. 

  130. // CHECK:STDOUT:
    131. 

  131. // CHECK:STDOUT: --- fail_non_constant_result.carbon
    132. 

  132. // CHECK:STDOUT:
    133. 

  133. // CHECK:STDOUT: constants {
    134. 

  134. // CHECK:STDOUT:   %pattern_type.98f: type = pattern_type type [concrete]
    135. 

  135. // CHECK:STDOUT:   %ChosenBranchIsNonConstant.type: type = fn_type @ChosenBranchIsNonConstant [concrete]
    136. 

  136. // CHECK:STDOUT:   %ChosenBranchIsNonConstant: %ChosenBranchIsNonConstant.type = struct_value () [concrete]
    137. 

  137. // CHECK:STDOUT:   %true: bool = bool_literal true [concrete]
    138. 

  138. // CHECK:STDOUT:   %int_32: Core.IntLiteral = int_value 32 [concrete]
    139. 

  139. // CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
    140. 

  140. // CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
    141. 

  141. // CHECK:STDOUT:   %i32: type = class_type @Int, @Int(%int_32) [concrete]
    142. 

  142. // CHECK:STDOUT:   %int_1: Core.IntLiteral = int_value 1 [concrete]
    143. 

  143. // CHECK:STDOUT:   %false: bool = bool_literal false [concrete]
    144. 

  144. // CHECK:STDOUT:   %Destroy.type: type = facet_type <@Destroy> [concrete]
    145. 

  145. // CHECK:STDOUT: }
    146. 

  146. // CHECK:STDOUT:
    147. 

  147. // CHECK:STDOUT: imports {
    148. 

  148. // CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
    149. 

  149. // CHECK:STDOUT:     .Int = %Core.Int
    150. 

  150. // CHECK:STDOUT:     .Destroy = %Core.Destroy
    151. 

  151. // CHECK:STDOUT:     import Core//prelude
    152. 

  152. // CHECK:STDOUT:     import Core//prelude/...
    153. 

  153. // CHECK:STDOUT:   }
    154. 

  154. // CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/parts/int, Int, loaded [concrete = constants.%Int.generic]
    155. 

  155. // CHECK:STDOUT:   %Core.Destroy: type = import_ref Core//prelude/parts/destroy, Destroy, loaded [concrete = constants.%Destroy.type]
    156. 

  156. // CHECK:STDOUT: }
    157. 

  157. // CHECK:STDOUT:
    158. 

  158. // CHECK:STDOUT: file {
    159. 

  159. // CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
    160. 

  160. // CHECK:STDOUT:     .Core = imports.%Core
    161. 

  161. // CHECK:STDOUT:     .ChosenBranchIsNonConstant = %ChosenBranchIsNonConstant.decl
    162. 

  162. // CHECK:STDOUT:   }
    163. 

  163. // CHECK:STDOUT:   %Core.import = import Core
    164. 

  164. // CHECK:STDOUT:   %ChosenBranchIsNonConstant.decl: %ChosenBranchIsNonConstant.type = fn_decl @ChosenBranchIsNonConstant [concrete = constants.%ChosenBranchIsNonConstant] {
    165. 

  165. // CHECK:STDOUT:     %t.patt: %pattern_type.98f = binding_pattern t [concrete]
    166. 

  166. // CHECK:STDOUT:     %t.param_patt: %pattern_type.98f = value_param_pattern %t.patt, call_param0 [concrete]
    167. 

  167. // CHECK:STDOUT:   } {
    168. 

  168. // CHECK:STDOUT:     %t.param: type = value_param call_param0
    169. 

  169. // CHECK:STDOUT:     %t: type = bind_name t, %t.param
    170. 

  170. // CHECK:STDOUT:   }
    171. 

  171. // CHECK:STDOUT: }
    172. 

  172. // CHECK:STDOUT:
    173. 

  173. // CHECK:STDOUT: fn @ChosenBranchIsNonConstant(%t.param: type) {
    174. 

  174. // CHECK:STDOUT: !entry:
    175. 

  175. // CHECK:STDOUT:   name_binding_decl {
    176. 

  176. // CHECK:STDOUT:     %v.patt: <error> = binding_pattern v [concrete]
    177. 

  177. // CHECK:STDOUT:     %v.var_patt: <error> = var_pattern %v.patt [concrete]
    178. 

  178. // CHECK:STDOUT:   }
    179. 

  179. // CHECK:STDOUT:   %v.var: ref <error> = var %v.var_patt [concrete = <error>]
    180. 

  180. // CHECK:STDOUT:   %int_1.loc9: Core.IntLiteral = int_value 1 [concrete = constants.%int_1]
    181. 

  181. // CHECK:STDOUT:   assign %v.var, <error>
    182. 

  182. // CHECK:STDOUT:   br !.loc9_13
    183. 

  183. // CHECK:STDOUT:
    184. 

  184. // CHECK:STDOUT: !.loc9_13:
    185. 

  185. // CHECK:STDOUT:   %true: bool = bool_literal true [concrete = constants.%true]
    186. 

  186. // CHECK:STDOUT:   if %true br !if.expr.then.loc9 else br !if.expr.else.loc9
    187. 

  187. // CHECK:STDOUT:
    188. 

  188. // CHECK:STDOUT: !if.expr.then.loc9:
    189. 

  189. // CHECK:STDOUT:   %t.ref.loc9: type = name_ref t, %t
    190. 

  190. // CHECK:STDOUT:   br !if.expr.result.loc9(%t.ref.loc9)
    191. 

  191. // CHECK:STDOUT:
    192. 

  192. // CHECK:STDOUT: !if.expr.else.loc9:
    193. 

  193. // CHECK:STDOUT:   %int_32.loc9: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
    194. 

  194. // CHECK:STDOUT:   %i32.loc9: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
    195. 

  195. // CHECK:STDOUT:   br !if.expr.result.loc9(%i32.loc9)
    196. 

  196. // CHECK:STDOUT:
    197. 

  197. // CHECK:STDOUT: !if.expr.result.loc9:
    198. 

  198. // CHECK:STDOUT:   %.loc9: type = block_arg !if.expr.result.loc9
    199. 

  199. // CHECK:STDOUT:   br !.loc9_7
    200. 

  200. // CHECK:STDOUT:
    201. 

  201. // CHECK:STDOUT: !.loc9_7:
    202. 

  202. // CHECK:STDOUT:   %v: <error> = bind_name v, <error> [concrete = <error>]
    203. 

  203. // CHECK:STDOUT:   name_binding_decl {
    204. 

  204. // CHECK:STDOUT:     %w.patt: <error> = binding_pattern w [concrete]
    205. 

  205. // CHECK:STDOUT:     %w.var_patt: <error> = var_pattern %w.patt [concrete]
    206. 

  206. // CHECK:STDOUT:   }
    207. 

  207. // CHECK:STDOUT:   %w.var: ref <error> = var %w.var_patt [concrete = <error>]
    208. 

  208. // CHECK:STDOUT:   %int_1.loc14: Core.IntLiteral = int_value 1 [concrete = constants.%int_1]
    209. 

  209. // CHECK:STDOUT:   assign %w.var, <error>
    210. 

  210. // CHECK:STDOUT:   br !.loc14_13
    211. 

  211. // CHECK:STDOUT:
    212. 

  212. // CHECK:STDOUT: !.loc14_13:
    213. 

  213. // CHECK:STDOUT:   %false: bool = bool_literal false [concrete = constants.%false]
    214. 

  214. // CHECK:STDOUT:   if %false br !if.expr.then.loc14 else br !if.expr.else.loc14
    215. 

  215. // CHECK:STDOUT:
    216. 

  216. // CHECK:STDOUT: !if.expr.then.loc14:
    217. 

  217. // CHECK:STDOUT:   %int_32.loc14: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
    218. 

  218. // CHECK:STDOUT:   %i32.loc14: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
    219. 

  219. // CHECK:STDOUT:   br !if.expr.result.loc14(%i32.loc14)
    220. 

  220. // CHECK:STDOUT:
    221. 

  221. // CHECK:STDOUT: !if.expr.else.loc14:
    222. 

  222. // CHECK:STDOUT:   %t.ref.loc14: type = name_ref t, %t
    223. 

  223. // CHECK:STDOUT:   br !if.expr.result.loc14(%t.ref.loc14)
    224. 

  224. // CHECK:STDOUT:
    225. 

  225. // CHECK:STDOUT: !if.expr.result.loc14:
    226. 

  226. // CHECK:STDOUT:   %.loc14: type = block_arg !if.expr.result.loc14
    227. 

  227. // CHECK:STDOUT:   br !.loc14_7
    228. 

  228. // CHECK:STDOUT:
    229. 

  229. // CHECK:STDOUT: !.loc14_7:
    230. 

  230. // CHECK:STDOUT:   %w: <error> = bind_name w, <error> [concrete = <error>]
    231. 

  231. // CHECK:STDOUT:   %impl.elem0.loc14: <error> = impl_witness_access <error>, element0 [concrete = <error>]
    232. 

  232. // CHECK:STDOUT:   %impl.elem0.loc9: <error> = impl_witness_access <error>, element0 [concrete = <error>]
    233. 

  233. // CHECK:STDOUT:   return
    234. 

  234. // CHECK:STDOUT: }
    235. 

  235. // CHECK:STDOUT:
    236.