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carbon-lang
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toolchain
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check
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testdata
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extern.carbon

extern.carbon 9.4 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/none.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/function/declaration/extern.carbon
    12. 

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

  13. // TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/function/declaration/extern.carbon
    14. 

  14. 

  15. // --- basic.carbon
    16. 

  16. 

  17. library "[[@TEST_NAME]]";
    18. 

  18. 

  19. extern fn F();
    20. 

  20. 

  21. // --- basic_use.carbon
    22. 

  22. 

  23. import library "basic";
    24. 

  24. 

  25. var x: () = F();
    26. 

  26. 

  27. // --- fail_redecl.carbon
    28. 

  28. 

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

  30. 

  31. extern fn F();
    32. 

  32. // CHECK:STDERR: fail_redecl.carbon:[[@LINE+7]]:1: error: redeclaration of `fn F` is redundant [RedeclRedundant]
    33. 

  33. // CHECK:STDERR: extern fn F();
    34. 

  34. // CHECK:STDERR: ^~~~~~~~~~~~~~
    35. 

  35. // CHECK:STDERR: fail_redecl.carbon:[[@LINE-4]]:1: note: previously declared here [RedeclPrevDecl]
    36. 

  36. // CHECK:STDERR: extern fn F();
    37. 

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

  38. // CHECK:STDERR:
    39. 

  39. extern fn F();
    40. 

  40. 

  41. // --- fail_redecl_extern.carbon
    42. 

  42. 

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

  44. 

  45. extern fn F();
    46. 

  46. // CHECK:STDERR: fail_redecl_extern.carbon:[[@LINE+7]]:1: error: redeclaration of `fn F` is redundant [RedeclRedundant]
    47. 

  47. // CHECK:STDERR: fn F();
    48. 

  48. // CHECK:STDERR: ^~~~~~~
    49. 

  49. // CHECK:STDERR: fail_redecl_extern.carbon:[[@LINE-4]]:1: note: previously declared here [RedeclPrevDecl]
    50. 

  50. // CHECK:STDERR: extern fn F();
    51. 

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

  52. // CHECK:STDERR:
    53. 

  53. fn F();
    54. 

  54. 

  55. // --- fail_member_extern.carbon
    56. 

  56. 

  57. library "[[@TEST_NAME]]";
    58. 

  58. 

  59. class C {
    60. 

  60.   // CHECK:STDERR: fail_member_extern.carbon:[[@LINE+4]]:3: error: `extern` not allowed; requires file or namespace scope [ModifierExternNotAllowed]
    61. 

  61.   // CHECK:STDERR:   extern fn F();
    62. 

  62.   // CHECK:STDERR:   ^~~~~~
    63. 

  63.   // CHECK:STDERR:
    64. 

  64.   extern fn F();
    65. 

  65.   // CHECK:STDERR: fail_member_extern.carbon:[[@LINE+4]]:3: error: `extern` not allowed; requires file or namespace scope [ModifierExternNotAllowed]
    66. 

  66.   // CHECK:STDERR:   extern fn G[self: Self]();
    67. 

  67.   // CHECK:STDERR:   ^~~~~~
    68. 

  68.   // CHECK:STDERR:
    69. 

  69.   extern fn G[self: Self]();
    70. 

  70. }
    71. 

  71. 

  72. // --- fail_extern_library_in_importer.carbon
    73. 

  73. 

  74. library "[[@TEST_NAME]]";
    75. 

  75. 

  76. import library "basic";
    77. 

  77. 

  78. // CHECK:STDERR: fail_extern_library_in_importer.carbon:[[@LINE+8]]:1: error: cannot declare imported `fn F` as `extern library` [ExternLibraryInImporter]
    79. 

  79. // CHECK:STDERR: extern library "basic" fn F();
    80. 

  80. // CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    81. 

  81. // CHECK:STDERR: fail_extern_library_in_importer.carbon:[[@LINE-5]]:1: in import [InImport]
    82. 

  82. // CHECK:STDERR: basic.carbon:4:1: note: previously declared here [RedeclPrevDecl]
    83. 

  83. // CHECK:STDERR: extern fn F();
    84. 

  84. // CHECK:STDERR: ^~~~~~~~~~~~~~
    85. 

  85. // CHECK:STDERR:
    86. 

  86. extern library "basic" fn F();
    87. 

  87. 

  88. // CHECK:STDOUT: --- basic.carbon
    89. 

  89. // CHECK:STDOUT:
    90. 

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

  91. // CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
    92. 

  92. // CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
    93. 

  93. // CHECK:STDOUT: }
    94. 

  94. // CHECK:STDOUT:
    95. 

  95. // CHECK:STDOUT: file {
    96. 

  96. // CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
    97. 

  97. // CHECK:STDOUT:     .F = %F.decl
    98. 

  98. // CHECK:STDOUT:   }
    99. 

  99. // CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
    100. 

  100. // CHECK:STDOUT: }
    101. 

  101. // CHECK:STDOUT:
    102. 

  102. // CHECK:STDOUT: extern fn @F();
    103. 

  103. // CHECK:STDOUT:
    104. 

  104. // CHECK:STDOUT: --- basic_use.carbon
    105. 

  105. // CHECK:STDOUT:
    106. 

  106. // CHECK:STDOUT: constants {
    107. 

  107. // CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
    108. 

  108. // CHECK:STDOUT:   %empty_tuple: %empty_tuple.type = tuple_value () [concrete]
    109. 

  109. // CHECK:STDOUT:   %pattern_type: type = pattern_type %empty_tuple.type [concrete]
    110. 

  110. // CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
    111. 

  111. // CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
    112. 

  112. // CHECK:STDOUT: }
    113. 

  113. // CHECK:STDOUT:
    114. 

  114. // CHECK:STDOUT: imports {
    115. 

  115. // CHECK:STDOUT:   %Main.F: %F.type = import_ref Main//basic, F, loaded [concrete = constants.%F]
    116. 

  116. // CHECK:STDOUT: }
    117. 

  117. // CHECK:STDOUT:
    118. 

  118. // CHECK:STDOUT: file {
    119. 

  119. // CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
    120. 

  120. // CHECK:STDOUT:     .F = imports.%Main.F
    121. 

  121. // CHECK:STDOUT:     .x = %x
    122. 

  122. // CHECK:STDOUT:   }
    123. 

  123. // CHECK:STDOUT:   %default.import = import <none>
    124. 

  124. // CHECK:STDOUT:   name_binding_decl {
    125. 

  125. // CHECK:STDOUT:     %x.patt: %pattern_type = ref_binding_pattern x [concrete]
    126. 

  126. // CHECK:STDOUT:     %x.var_patt: %pattern_type = var_pattern %x.patt [concrete]
    127. 

  127. // CHECK:STDOUT:   }
    128. 

  128. // CHECK:STDOUT:   %x.var: ref %empty_tuple.type = var %x.var_patt [concrete]
    129. 

  129. // CHECK:STDOUT:   %.loc4_9.1: type = splice_block %.loc4_9.3 [concrete = constants.%empty_tuple.type] {
    130. 

  130. // CHECK:STDOUT:     %.loc4_9.2: %empty_tuple.type = tuple_literal () [concrete = constants.%empty_tuple]
    131. 

  131. // CHECK:STDOUT:     %.loc4_9.3: type = converted %.loc4_9.2, constants.%empty_tuple.type [concrete = constants.%empty_tuple.type]
    132. 

  132. // CHECK:STDOUT:   }
    133. 

  133. // CHECK:STDOUT:   %x: ref %empty_tuple.type = ref_binding x, %x.var [concrete = %x.var]
    134. 

  134. // CHECK:STDOUT: }
    135. 

  135. // CHECK:STDOUT:
    136. 

  136. // CHECK:STDOUT: extern fn @F [from "basic.carbon"];
    137. 

  137. // CHECK:STDOUT:
    138. 

  138. // CHECK:STDOUT: fn @__global_init() {
    139. 

  139. // CHECK:STDOUT: !entry:
    140. 

  140. // CHECK:STDOUT:   %F.ref: %F.type = name_ref F, imports.%Main.F [concrete = constants.%F]
    141. 

  141. // CHECK:STDOUT:   %F.call: init %empty_tuple.type = call %F.ref()
    142. 

  142. // CHECK:STDOUT:   assign file.%x.var, %F.call
    143. 

  143. // CHECK:STDOUT:   return
    144. 

  144. // CHECK:STDOUT: }
    145. 

  145. // CHECK:STDOUT:
    146. 

  146. // CHECK:STDOUT: --- fail_redecl.carbon
    147. 

  147. // CHECK:STDOUT:
    148. 

  148. // CHECK:STDOUT: constants {
    149. 

  149. // CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
    150. 

  150. // CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
    151. 

  151. // CHECK:STDOUT: }
    152. 

  152. // CHECK:STDOUT:
    153. 

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

  154. // CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
    155. 

  155. // CHECK:STDOUT:     .F = %F.decl.loc4
    156. 

  156. // CHECK:STDOUT:   }
    157. 

  157. // CHECK:STDOUT:   %F.decl.loc4: %F.type = fn_decl @F [concrete = constants.%F] {} {}
    158. 

  158. // CHECK:STDOUT:   %F.decl.loc12: %F.type = fn_decl @F [concrete = constants.%F] {} {}
    159. 

  159. // CHECK:STDOUT: }
    160. 

  160. // CHECK:STDOUT:
    161. 

  161. // CHECK:STDOUT: extern fn @F();
    162. 

  162. // CHECK:STDOUT:
    163. 

  163. // CHECK:STDOUT: --- fail_redecl_extern.carbon
    164. 

  164. // CHECK:STDOUT:
    165. 

  165. // CHECK:STDOUT: constants {
    166. 

  166. // CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
    167. 

  167. // CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
    168. 

  168. // CHECK:STDOUT: }
    169. 

  169. // CHECK:STDOUT:
    170. 

  170. // CHECK:STDOUT: file {
    171. 

  171. // CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
    172. 

  172. // CHECK:STDOUT:     .F = %F.decl.loc4
    173. 

  173. // CHECK:STDOUT:   }
    174. 

  174. // CHECK:STDOUT:   %F.decl.loc4: %F.type = fn_decl @F [concrete = constants.%F] {} {}
    175. 

  175. // CHECK:STDOUT:   %F.decl.loc12: %F.type = fn_decl @F [concrete = constants.%F] {} {}
    176. 

  176. // CHECK:STDOUT: }
    177. 

  177. // CHECK:STDOUT:
    178. 

  178. // CHECK:STDOUT: extern fn @F();
    179. 

  179. // CHECK:STDOUT:
    180. 

  180. // CHECK:STDOUT: --- fail_member_extern.carbon
    181. 

  181. // CHECK:STDOUT:
    182. 

  182. // CHECK:STDOUT: constants {
    183. 

  183. // CHECK:STDOUT:   %C: type = class_type @C [concrete]
    184. 

  184. // CHECK:STDOUT:   %C.F.type: type = fn_type @C.F [concrete]
    185. 

  185. // CHECK:STDOUT:   %C.F: %C.F.type = struct_value () [concrete]
    186. 

  186. // CHECK:STDOUT:   %pattern_type: type = pattern_type %C [concrete]
    187. 

  187. // CHECK:STDOUT:   %C.G.type: type = fn_type @C.G [concrete]
    188. 

  188. // CHECK:STDOUT:   %C.G: %C.G.type = struct_value () [concrete]
    189. 

  189. // CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
    190. 

  190. // CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
    191. 

  191. // CHECK:STDOUT: }
    192. 

  192. // CHECK:STDOUT:
    193. 

  193. // CHECK:STDOUT: file {
    194. 

  194. // CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
    195. 

  195. // CHECK:STDOUT:     .C = %C.decl
    196. 

  196. // CHECK:STDOUT:   }
    197. 

  197. // CHECK:STDOUT:   %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
    198. 

  198. // CHECK:STDOUT: }
    199. 

  199. // CHECK:STDOUT:
    200. 

  200. // CHECK:STDOUT: class @C {
    201. 

  201. // CHECK:STDOUT:   %C.F.decl: %C.F.type = fn_decl @C.F [concrete = constants.%C.F] {} {}
    202. 

  202. // CHECK:STDOUT:   %C.G.decl: %C.G.type = fn_decl @C.G [concrete = constants.%C.G] {
    203. 

  203. // CHECK:STDOUT:     %self.param_patt: %pattern_type = value_param_pattern [concrete]
    204. 

  204. // CHECK:STDOUT:     %self.patt: %pattern_type = at_binding_pattern self, %self.param_patt [concrete]
    205. 

  205. // CHECK:STDOUT:   } {
    206. 

  206. // CHECK:STDOUT:     %self.param: %C = value_param call_param0
    207. 

  207. // CHECK:STDOUT:     %Self.ref: type = name_ref Self, constants.%C [concrete = constants.%C]
    208. 

  208. // CHECK:STDOUT:     %self: %C = value_binding self, %self.param
    209. 

  209. // CHECK:STDOUT:   }
    210. 

  210. // CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness constants.%empty_struct_type [concrete = constants.%complete_type]
    211. 

  211. // CHECK:STDOUT:   complete_type_witness = %complete_type
    212. 

  212. // CHECK:STDOUT:
    213. 

  213. // CHECK:STDOUT: !members:
    214. 

  214. // CHECK:STDOUT:   .Self = constants.%C
    215. 

  215. // CHECK:STDOUT:   .F = %C.F.decl
    216. 

  216. // CHECK:STDOUT:   .G = %C.G.decl
    217. 

  217. // CHECK:STDOUT: }
    218. 

  218. // CHECK:STDOUT:
    219. 

  219. // CHECK:STDOUT: fn @C.F();
    220. 

  220. // CHECK:STDOUT:
    221. 

  221. // CHECK:STDOUT: fn @C.G(%self.param: %C);
    222. 

  222. // CHECK:STDOUT:
    223. 

  223. // CHECK:STDOUT: --- fail_extern_library_in_importer.carbon
    224. 

  224. // CHECK:STDOUT:
    225. 

  225. // CHECK:STDOUT: constants {
    226. 

  226. // CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
    227. 

  227. // CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
    228. 

  228. // CHECK:STDOUT: }
    229. 

  229. // CHECK:STDOUT:
    230. 

  230. // CHECK:STDOUT: file {
    231. 

  231. // CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
    232. 

  232. // CHECK:STDOUT:     .F = invalid
    233. 

  233. // CHECK:STDOUT:   }
    234. 

  234. // CHECK:STDOUT:   %default.import = import <none>
    235. 

  235. // CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
    236. 

  236. // CHECK:STDOUT: }
    237. 

  237. // CHECK:STDOUT:
    238. 

  238. // CHECK:STDOUT: extern fn @F [from "basic.carbon"];
    239. 

  239. // CHECK:STDOUT:
    240.