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basics.carbon

basics.carbon 9.2 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/convert.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/const/basics.carbon
    10. 

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

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

  12. 

  13. // --- basic.carbon
    14. 

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

  15. 

  16. class C;
    17. 

  17. 

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

  19. fn A(p: const C**) -> const C** {
    20. 

  20.   return p;
    21. 

  21. }
    22. 

  22. 

  23. fn B(p: const (C*)) -> const (C*) {
    24. 

  24.   return p;
    25. 

  25. }
    26. 

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

  27. 

  28. // --- collapse.carbon
    29. 

  29. library "[[@TEST_NAME]]";
    30. 

  30. 

  31. class C;
    32. 

  32. 

  33. // OK, `const (const C)` is the same type as `const C`.
    34. 

  34. //@dump-sem-ir-begin
    35. 

  35. // CHECK:STDERR: collapse.carbon:[[@LINE+4]]:23: warning: `const` applied repeatedly to the same type has no additional effect [RepeatedConst]
    36. 

  36. // CHECK:STDERR: fn F(p: const C**) -> const (const C)** {
    37. 

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

  38. // CHECK:STDERR:
    39. 

  39. fn F(p: const C**) -> const (const C)** {
    40. 

  40.   return p;
    41. 

  41. }
    42. 

  42. //@dump-sem-ir-end
    43. 

  43. 

  44. // --- fail_collapse_in_error.carbon
    45. 

  45. library "[[@TEST_NAME]]";
    46. 

  46. 

  47. class C;
    48. 

  48. 

  49. // CHECK:STDERR: fail_collapse_in_error.carbon:[[@LINE+4]]:9: warning: `const` applied repeatedly to the same type has no additional effect [RepeatedConst]
    50. 

  50. // CHECK:STDERR: fn G(p: const (const C)**) -> C** {
    51. 

  51. // CHECK:STDERR:         ^~~~~~~~~~~~~~~
    52. 

  52. // CHECK:STDERR:
    53. 

  53. fn G(p: const (const C)**) -> C** {
    54. 

  54.   // CHECK:STDERR: fail_collapse_in_error.carbon:[[@LINE+7]]:3: error: cannot implicitly convert expression of type `const C**` to `C**` [ConversionFailure]
    55. 

  55.   // CHECK:STDERR:   return p;
    56. 

  56.   // CHECK:STDERR:   ^~~~~~~~~
    57. 

  57.   // CHECK:STDERR: fail_collapse_in_error.carbon:[[@LINE+4]]:3: note: type `const C**` does not implement interface `Core.ImplicitAs(C**)` [MissingImplInMemberAccessNote]
    58. 

  58.   // CHECK:STDERR:   return p;
    59. 

  59.   // CHECK:STDERR:   ^~~~~~~~~
    60. 

  60.   // CHECK:STDERR:
    61. 

  61.   return p;
    62. 

  62. }
    63. 

  63. 

  64. // CHECK:STDOUT: --- basic.carbon
    65. 

  65. // CHECK:STDOUT:
    66. 

  66. // CHECK:STDOUT: constants {
    67. 

  67. // CHECK:STDOUT:   %C: type = class_type @C [concrete]
    68. 

  68. // CHECK:STDOUT:   %const.668: type = const_type %C [concrete]
    69. 

  69. // CHECK:STDOUT:   %ptr.801: type = ptr_type %const.668 [concrete]
    70. 

  70. // CHECK:STDOUT:   %ptr.564: type = ptr_type %ptr.801 [concrete]
    71. 

  71. // CHECK:STDOUT:   %pattern_type.28c: type = pattern_type %ptr.564 [concrete]
    72. 

  72. // CHECK:STDOUT:   %A.type: type = fn_type @A [concrete]
    73. 

  73. // CHECK:STDOUT:   %A: %A.type = struct_value () [concrete]
    74. 

  74. // CHECK:STDOUT:   %ptr.019: type = ptr_type %C [concrete]
    75. 

  75. // CHECK:STDOUT:   %const.2b1: type = const_type %ptr.019 [concrete]
    76. 

  76. // CHECK:STDOUT:   %pattern_type.3a2: type = pattern_type %const.2b1 [concrete]
    77. 

  77. // CHECK:STDOUT:   %B.type: type = fn_type @B [concrete]
    78. 

  78. // CHECK:STDOUT:   %B: %B.type = struct_value () [concrete]
    79. 

  79. // CHECK:STDOUT: }
    80. 

  80. // CHECK:STDOUT:
    81. 

  81. // CHECK:STDOUT: imports {
    82. 

  82. // CHECK:STDOUT: }
    83. 

  83. // CHECK:STDOUT:
    84. 

  84. // CHECK:STDOUT: file {
    85. 

  85. // CHECK:STDOUT:   %A.decl: %A.type = fn_decl @A [concrete = constants.%A] {
    86. 

  86. // CHECK:STDOUT:     %p.patt: %pattern_type.28c = binding_pattern p [concrete]
    87. 

  87. // CHECK:STDOUT:     %p.param_patt: %pattern_type.28c = value_param_pattern %p.patt, call_param0 [concrete]
    88. 

  88. // CHECK:STDOUT:     %return.patt: %pattern_type.28c = return_slot_pattern [concrete]
    89. 

  89. // CHECK:STDOUT:     %return.param_patt: %pattern_type.28c = out_param_pattern %return.patt, call_param1 [concrete]
    90. 

  90. // CHECK:STDOUT:   } {
    91. 

  91. // CHECK:STDOUT:     %C.ref.loc6_29: type = name_ref C, file.%C.decl [concrete = constants.%C]
    92. 

  92. // CHECK:STDOUT:     %const.loc6_23: type = const_type %C.ref.loc6_29 [concrete = constants.%const.668]
    93. 

  93. // CHECK:STDOUT:     %ptr.loc6_30: type = ptr_type %const.loc6_23 [concrete = constants.%ptr.801]
    94. 

  94. // CHECK:STDOUT:     %ptr.loc6_31: type = ptr_type %ptr.loc6_30 [concrete = constants.%ptr.564]
    95. 

  95. // CHECK:STDOUT:     %p.param: %ptr.564 = value_param call_param0
    96. 

  96. // CHECK:STDOUT:     %.loc6: type = splice_block %ptr.loc6_17 [concrete = constants.%ptr.564] {
    97. 

  97. // CHECK:STDOUT:       %C.ref.loc6_15: type = name_ref C, file.%C.decl [concrete = constants.%C]
    98. 

  98. // CHECK:STDOUT:       %const.loc6_9: type = const_type %C.ref.loc6_15 [concrete = constants.%const.668]
    99. 

  99. // CHECK:STDOUT:       %ptr.loc6_16: type = ptr_type %const.loc6_9 [concrete = constants.%ptr.801]
    100. 

  100. // CHECK:STDOUT:       %ptr.loc6_17: type = ptr_type %ptr.loc6_16 [concrete = constants.%ptr.564]
    101. 

  101. // CHECK:STDOUT:     }
    102. 

  102. // CHECK:STDOUT:     %p: %ptr.564 = bind_name p, %p.param
    103. 

  103. // CHECK:STDOUT:     %return.param: ref %ptr.564 = out_param call_param1
    104. 

  104. // CHECK:STDOUT:     %return: ref %ptr.564 = return_slot %return.param
    105. 

  105. // CHECK:STDOUT:   }
    106. 

  106. // CHECK:STDOUT:   %B.decl: %B.type = fn_decl @B [concrete = constants.%B] {
    107. 

  107. // CHECK:STDOUT:     %p.patt: %pattern_type.3a2 = binding_pattern p [concrete]
    108. 

  108. // CHECK:STDOUT:     %p.param_patt: %pattern_type.3a2 = value_param_pattern %p.patt, call_param0 [concrete]
    109. 

  109. // CHECK:STDOUT:     %return.patt: %pattern_type.3a2 = return_slot_pattern [concrete]
    110. 

  110. // CHECK:STDOUT:     %return.param_patt: %pattern_type.3a2 = out_param_pattern %return.patt, call_param1 [concrete]
    111. 

  111. // CHECK:STDOUT:   } {
    112. 

  112. // CHECK:STDOUT:     %C.ref.loc10_31: type = name_ref C, file.%C.decl [concrete = constants.%C]
    113. 

  113. // CHECK:STDOUT:     %ptr.loc10_32: type = ptr_type %C.ref.loc10_31 [concrete = constants.%ptr.019]
    114. 

  114. // CHECK:STDOUT:     %const.loc10_24: type = const_type %ptr.loc10_32 [concrete = constants.%const.2b1]
    115. 

  115. // CHECK:STDOUT:     %p.param: %const.2b1 = value_param call_param0
    116. 

  116. // CHECK:STDOUT:     %.loc10: type = splice_block %const.loc10_9 [concrete = constants.%const.2b1] {
    117. 

  117. // CHECK:STDOUT:       %C.ref.loc10_16: type = name_ref C, file.%C.decl [concrete = constants.%C]
    118. 

  118. // CHECK:STDOUT:       %ptr.loc10_17: type = ptr_type %C.ref.loc10_16 [concrete = constants.%ptr.019]
    119. 

  119. // CHECK:STDOUT:       %const.loc10_9: type = const_type %ptr.loc10_17 [concrete = constants.%const.2b1]
    120. 

  120. // CHECK:STDOUT:     }
    121. 

  121. // CHECK:STDOUT:     %p: %const.2b1 = bind_name p, %p.param
    122. 

  122. // CHECK:STDOUT:     %return.param: ref %const.2b1 = out_param call_param1
    123. 

  123. // CHECK:STDOUT:     %return: ref %const.2b1 = return_slot %return.param
    124. 

  124. // CHECK:STDOUT:   }
    125. 

  125. // CHECK:STDOUT: }
    126. 

  126. // CHECK:STDOUT:
    127. 

  127. // CHECK:STDOUT: fn @A(%p.param: %ptr.564) -> %ptr.564 {
    128. 

  128. // CHECK:STDOUT: !entry:
    129. 

  129. // CHECK:STDOUT:   %p.ref: %ptr.564 = name_ref p, %p
    130. 

  130. // CHECK:STDOUT:   return %p.ref
    131. 

  131. // CHECK:STDOUT: }
    132. 

  132. // CHECK:STDOUT:
    133. 

  133. // CHECK:STDOUT: fn @B(%p.param: %const.2b1) -> %const.2b1 {
    134. 

  134. // CHECK:STDOUT: !entry:
    135. 

  135. // CHECK:STDOUT:   %p.ref: %const.2b1 = name_ref p, %p
    136. 

  136. // CHECK:STDOUT:   return %p.ref
    137. 

  137. // CHECK:STDOUT: }
    138. 

  138. // CHECK:STDOUT:
    139. 

  139. // CHECK:STDOUT: --- collapse.carbon
    140. 

  140. // CHECK:STDOUT:
    141. 

  141. // CHECK:STDOUT: constants {
    142. 

  142. // CHECK:STDOUT:   %C: type = class_type @C [concrete]
    143. 

  143. // CHECK:STDOUT:   %const: type = const_type %C [concrete]
    144. 

  144. // CHECK:STDOUT:   %ptr.801: type = ptr_type %const [concrete]
    145. 

  145. // CHECK:STDOUT:   %ptr.564: type = ptr_type %ptr.801 [concrete]
    146. 

  146. // CHECK:STDOUT:   %pattern_type: type = pattern_type %ptr.564 [concrete]
    147. 

  147. // CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
    148. 

  148. // CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
    149. 

  149. // CHECK:STDOUT: }
    150. 

  150. // CHECK:STDOUT:
    151. 

  151. // CHECK:STDOUT: imports {
    152. 

  152. // CHECK:STDOUT: }
    153. 

  153. // CHECK:STDOUT:
    154. 

  154. // CHECK:STDOUT: file {
    155. 

  155. // CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {
    156. 

  156. // CHECK:STDOUT:     %p.patt: %pattern_type = binding_pattern p [concrete]
    157. 

  157. // CHECK:STDOUT:     %p.param_patt: %pattern_type = value_param_pattern %p.patt, call_param0 [concrete]
    158. 

  158. // CHECK:STDOUT:     %return.patt: %pattern_type = return_slot_pattern [concrete]
    159. 

  159. // CHECK:STDOUT:     %return.param_patt: %pattern_type = out_param_pattern %return.patt, call_param1 [concrete]
    160. 

  160. // CHECK:STDOUT:   } {
    161. 

  161. // CHECK:STDOUT:     %C.ref.loc11_36: type = name_ref C, file.%C.decl [concrete = constants.%C]
    162. 

  162. // CHECK:STDOUT:     %const.loc11_30: type = const_type %C.ref.loc11_36 [concrete = constants.%const]
    163. 

  163. // CHECK:STDOUT:     %const.loc11_23: type = const_type %const.loc11_30 [concrete = constants.%const]
    164. 

  164. // CHECK:STDOUT:     %ptr.loc11_38: type = ptr_type %const.loc11_23 [concrete = constants.%ptr.801]
    165. 

  165. // CHECK:STDOUT:     %ptr.loc11_39: type = ptr_type %ptr.loc11_38 [concrete = constants.%ptr.564]
    166. 

  166. // CHECK:STDOUT:     %p.param: %ptr.564 = value_param call_param0
    167. 

  167. // CHECK:STDOUT:     %.loc11: type = splice_block %ptr.loc11_17 [concrete = constants.%ptr.564] {
    168. 

  168. // CHECK:STDOUT:       %C.ref.loc11_15: type = name_ref C, file.%C.decl [concrete = constants.%C]
    169. 

  169. // CHECK:STDOUT:       %const.loc11_9: type = const_type %C.ref.loc11_15 [concrete = constants.%const]
    170. 

  170. // CHECK:STDOUT:       %ptr.loc11_16: type = ptr_type %const.loc11_9 [concrete = constants.%ptr.801]
    171. 

  171. // CHECK:STDOUT:       %ptr.loc11_17: type = ptr_type %ptr.loc11_16 [concrete = constants.%ptr.564]
    172. 

  172. // CHECK:STDOUT:     }
    173. 

  173. // CHECK:STDOUT:     %p: %ptr.564 = bind_name p, %p.param
    174. 

  174. // CHECK:STDOUT:     %return.param: ref %ptr.564 = out_param call_param1
    175. 

  175. // CHECK:STDOUT:     %return: ref %ptr.564 = return_slot %return.param
    176. 

  176. // CHECK:STDOUT:   }
    177. 

  177. // CHECK:STDOUT: }
    178. 

  178. // CHECK:STDOUT:
    179. 

  179. // CHECK:STDOUT: fn @F(%p.param: %ptr.564) -> %ptr.564 {
    180. 

  180. // CHECK:STDOUT: !entry:
    181. 

  181. // CHECK:STDOUT:   %p.ref: %ptr.564 = name_ref p, %p
    182. 

  182. // CHECK:STDOUT:   return %p.ref
    183. 

  183. // CHECK:STDOUT: }
    184. 

  184. // CHECK:STDOUT:
    185.