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extern.carbon

extern.carbon 8.9 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. // AUTOUPDATE
    6. 

  6. // TIP: To test this file alone, run:
    7. 

  7. // TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/function/declaration/no_prelude/extern.carbon
    8. 

  8. // TIP: To dump output, run:
    9. 

  9. // TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/function/declaration/no_prelude/extern.carbon
    10. 

  10. 

  11. // --- basic.carbon
    12. 

  12. 

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

  14. 

  15. extern fn F();
    16. 

  16. 

  17. // --- basic_use.carbon
    18. 

  18. 

  19. import library "basic";
    20. 

  20. 

  21. var x: () = F();
    22. 

  22. 

  23. // --- fail_redecl.carbon
    24. 

  24. 

  25. library "[[@TEST_NAME]]";
    26. 

  26. 

  27. extern fn F();
    28. 

  28. // CHECK:STDERR: fail_redecl.carbon:[[@LINE+7]]:1: error: redeclaration of `fn F` is redundant [RedeclRedundant]
    29. 

  29. // CHECK:STDERR: extern fn F();
    30. 

  30. // CHECK:STDERR: ^~~~~~~~~~~~~~
    31. 

  31. // CHECK:STDERR: fail_redecl.carbon:[[@LINE-4]]:1: note: previously declared here [RedeclPrevDecl]
    32. 

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

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

  34. // CHECK:STDERR:
    35. 

  35. extern fn F();
    36. 

  36. 

  37. // --- fail_redecl_extern.carbon
    38. 

  38. 

  39. library "[[@TEST_NAME]]";
    40. 

  40. 

  41. extern fn F();
    42. 

  42. // CHECK:STDERR: fail_redecl_extern.carbon:[[@LINE+7]]:1: error: redeclaration of `fn F` is redundant [RedeclRedundant]
    43. 

  43. // CHECK:STDERR: fn F();
    44. 

  44. // CHECK:STDERR: ^~~~~~~
    45. 

  45. // CHECK:STDERR: fail_redecl_extern.carbon:[[@LINE-4]]:1: note: previously declared here [RedeclPrevDecl]
    46. 

  46. // CHECK:STDERR: extern fn F();
    47. 

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

  48. // CHECK:STDERR:
    49. 

  49. fn F();
    50. 

  50. 

  51. // --- fail_member_extern.carbon
    52. 

  52. 

  53. library "[[@TEST_NAME]]";
    54. 

  54. 

  55. class C {
    56. 

  56.   // CHECK:STDERR: fail_member_extern.carbon:[[@LINE+4]]:3: error: `extern` not allowed; requires file or namespace scope [ModifierExternNotAllowed]
    57. 

  57.   // CHECK:STDERR:   extern fn F();
    58. 

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

  59.   // CHECK:STDERR:
    60. 

  60.   extern fn F();
    61. 

  61.   // CHECK:STDERR: fail_member_extern.carbon:[[@LINE+4]]:3: error: `extern` not allowed; requires file or namespace scope [ModifierExternNotAllowed]
    62. 

  62.   // CHECK:STDERR:   extern fn G[self: Self]();
    63. 

  63.   // CHECK:STDERR:   ^~~~~~
    64. 

  64.   // CHECK:STDERR:
    65. 

  65.   extern fn G[self: Self]();
    66. 

  66. }
    67. 

  67. 

  68. // --- fail_extern_library_in_importer.carbon
    69. 

  69. 

  70. library "[[@TEST_NAME]]";
    71. 

  71. 

  72. import library "basic";
    73. 

  73. 

  74. // CHECK:STDERR: fail_extern_library_in_importer.carbon:[[@LINE+8]]:1: error: cannot declare imported `fn F` as `extern library` [ExternLibraryInImporter]
    75. 

  75. // CHECK:STDERR: extern library "basic" fn F();
    76. 

  76. // CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    77. 

  77. // CHECK:STDERR: fail_extern_library_in_importer.carbon:[[@LINE-5]]:1: in import [InImport]
    78. 

  78. // CHECK:STDERR: basic.carbon:4:1: note: previously declared here [RedeclPrevDecl]
    79. 

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

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

  81. // CHECK:STDERR:
    82. 

  82. extern library "basic" fn F();
    83. 

  83. 

  84. // CHECK:STDOUT: --- basic.carbon
    85. 

  85. // CHECK:STDOUT:
    86. 

  86. // CHECK:STDOUT: constants {
    87. 

  87. // CHECK:STDOUT:   %F.type: type = fn_type @F [template]
    88. 

  88. // CHECK:STDOUT:   %F: %F.type = struct_value () [template]
    89. 

  89. // CHECK:STDOUT: }
    90. 

  90. // CHECK:STDOUT:
    91. 

  91. // CHECK:STDOUT: file {
    92. 

  92. // CHECK:STDOUT:   package: <namespace> = namespace [template] {
    93. 

  93. // CHECK:STDOUT:     .F = %F.decl
    94. 

  94. // CHECK:STDOUT:   }
    95. 

  95. // CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [template = constants.%F] {} {}
    96. 

  96. // CHECK:STDOUT: }
    97. 

  97. // CHECK:STDOUT:
    98. 

  98. // CHECK:STDOUT: extern fn @F();
    99. 

  99. // CHECK:STDOUT:
    100. 

  100. // CHECK:STDOUT: --- basic_use.carbon
    101. 

  101. // CHECK:STDOUT:
    102. 

  102. // CHECK:STDOUT: constants {
    103. 

  103. // CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [template]
    104. 

  104. // CHECK:STDOUT:   %F.type: type = fn_type @F [template]
    105. 

  105. // CHECK:STDOUT:   %F: %F.type = struct_value () [template]
    106. 

  106. // CHECK:STDOUT: }
    107. 

  107. // CHECK:STDOUT:
    108. 

  108. // CHECK:STDOUT: imports {
    109. 

  109. // CHECK:STDOUT:   %Main.F: %F.type = import_ref Main//basic, F, loaded [template = constants.%F]
    110. 

  110. // CHECK:STDOUT: }
    111. 

  111. // CHECK:STDOUT:
    112. 

  112. // CHECK:STDOUT: file {
    113. 

  113. // CHECK:STDOUT:   package: <namespace> = namespace [template] {
    114. 

  114. // CHECK:STDOUT:     .F = imports.%Main.F
    115. 

  115. // CHECK:STDOUT:     .x = %x
    116. 

  116. // CHECK:STDOUT:   }
    117. 

  117. // CHECK:STDOUT:   %default.import = import <none>
    118. 

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

  119. // CHECK:STDOUT:     %x.patt: %empty_tuple.type = binding_pattern x
    120. 

  120. // CHECK:STDOUT:     %.loc4_1: %empty_tuple.type = var_pattern %x.patt
    121. 

  121. // CHECK:STDOUT:   }
    122. 

  122. // CHECK:STDOUT:   %x.var: ref %empty_tuple.type = var x
    123. 

  123. // CHECK:STDOUT:   %.loc4_9.1: type = splice_block %.loc4_9.3 [template = constants.%empty_tuple.type] {
    124. 

  124. // CHECK:STDOUT:     %.loc4_9.2: %empty_tuple.type = tuple_literal ()
    125. 

  125. // CHECK:STDOUT:     %.loc4_9.3: type = converted %.loc4_9.2, constants.%empty_tuple.type [template = constants.%empty_tuple.type]
    126. 

  126. // CHECK:STDOUT:   }
    127. 

  127. // CHECK:STDOUT:   %x: ref %empty_tuple.type = bind_name x, %x.var
    128. 

  128. // CHECK:STDOUT: }
    129. 

  129. // CHECK:STDOUT:
    130. 

  130. // CHECK:STDOUT: extern fn @F() [from "basic.carbon"];
    131. 

  131. // CHECK:STDOUT:
    132. 

  132. // CHECK:STDOUT: fn @__global_init() {
    133. 

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

  134. // CHECK:STDOUT:   %F.ref: %F.type = name_ref F, imports.%Main.F [template = constants.%F]
    135. 

  135. // CHECK:STDOUT:   %F.call: init %empty_tuple.type = call %F.ref()
    136. 

  136. // CHECK:STDOUT:   assign file.%x.var, %F.call
    137. 

  137. // CHECK:STDOUT:   return
    138. 

  138. // CHECK:STDOUT: }
    139. 

  139. // CHECK:STDOUT:
    140. 

  140. // CHECK:STDOUT: --- fail_redecl.carbon
    141. 

  141. // CHECK:STDOUT:
    142. 

  142. // CHECK:STDOUT: constants {
    143. 

  143. // CHECK:STDOUT:   %F.type: type = fn_type @F [template]
    144. 

  144. // CHECK:STDOUT:   %F: %F.type = struct_value () [template]
    145. 

  145. // CHECK:STDOUT: }
    146. 

  146. // CHECK:STDOUT:
    147. 

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

  148. // CHECK:STDOUT:   package: <namespace> = namespace [template] {
    149. 

  149. // CHECK:STDOUT:     .F = %F.decl.loc4
    150. 

  150. // CHECK:STDOUT:   }
    151. 

  151. // CHECK:STDOUT:   %F.decl.loc4: %F.type = fn_decl @F [template = constants.%F] {} {}
    152. 

  152. // CHECK:STDOUT:   %F.decl.loc12: %F.type = fn_decl @F [template = constants.%F] {} {}
    153. 

  153. // CHECK:STDOUT: }
    154. 

  154. // CHECK:STDOUT:
    155. 

  155. // CHECK:STDOUT: extern fn @F();
    156. 

  156. // CHECK:STDOUT:
    157. 

  157. // CHECK:STDOUT: --- fail_redecl_extern.carbon
    158. 

  158. // CHECK:STDOUT:
    159. 

  159. // CHECK:STDOUT: constants {
    160. 

  160. // CHECK:STDOUT:   %F.type: type = fn_type @F [template]
    161. 

  161. // CHECK:STDOUT:   %F: %F.type = struct_value () [template]
    162. 

  162. // CHECK:STDOUT: }
    163. 

  163. // CHECK:STDOUT:
    164. 

  164. // CHECK:STDOUT: file {
    165. 

  165. // CHECK:STDOUT:   package: <namespace> = namespace [template] {
    166. 

  166. // CHECK:STDOUT:     .F = %F.decl.loc4
    167. 

  167. // CHECK:STDOUT:   }
    168. 

  168. // CHECK:STDOUT:   %F.decl.loc4: %F.type = fn_decl @F [template = constants.%F] {} {}
    169. 

  169. // CHECK:STDOUT:   %F.decl.loc12: %F.type = fn_decl @F [template = constants.%F] {} {}
    170. 

  170. // CHECK:STDOUT: }
    171. 

  171. // CHECK:STDOUT:
    172. 

  172. // CHECK:STDOUT: extern fn @F();
    173. 

  173. // CHECK:STDOUT:
    174. 

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

  175. // CHECK:STDOUT:
    176. 

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

  177. // CHECK:STDOUT:   %C: type = class_type @C [template]
    178. 

  178. // CHECK:STDOUT:   %F.type: type = fn_type @F [template]
    179. 

  179. // CHECK:STDOUT:   %F: %F.type = struct_value () [template]
    180. 

  180. // CHECK:STDOUT:   %G.type: type = fn_type @G [template]
    181. 

  181. // CHECK:STDOUT:   %G: %G.type = struct_value () [template]
    182. 

  182. // CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [template]
    183. 

  183. // CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [template]
    184. 

  184. // CHECK:STDOUT: }
    185. 

  185. // CHECK:STDOUT:
    186. 

  186. // CHECK:STDOUT: file {
    187. 

  187. // CHECK:STDOUT:   package: <namespace> = namespace [template] {
    188. 

  188. // CHECK:STDOUT:     .C = %C.decl
    189. 

  189. // CHECK:STDOUT:   }
    190. 

  190. // CHECK:STDOUT:   %C.decl: type = class_decl @C [template = constants.%C] {} {}
    191. 

  191. // CHECK:STDOUT: }
    192. 

  192. // CHECK:STDOUT:
    193. 

  193. // CHECK:STDOUT: class @C {
    194. 

  194. // CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [template = constants.%F] {} {}
    195. 

  195. // CHECK:STDOUT:   %G.decl: %G.type = fn_decl @G [template = constants.%G] {
    196. 

  196. // CHECK:STDOUT:     %self.patt: %C = binding_pattern self
    197. 

  197. // CHECK:STDOUT:     %self.param_patt: %C = value_param_pattern %self.patt, runtime_param0
    198. 

  198. // CHECK:STDOUT:   } {
    199. 

  199. // CHECK:STDOUT:     %self.param: %C = value_param runtime_param0
    200. 

  200. // CHECK:STDOUT:     %Self.ref: type = name_ref Self, constants.%C [template = constants.%C]
    201. 

  201. // CHECK:STDOUT:     %self: %C = bind_name self, %self.param
    202. 

  202. // CHECK:STDOUT:   }
    203. 

  203. // CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [template = constants.%complete_type]
    204. 

  204. // CHECK:STDOUT:   complete_type_witness = %complete_type
    205. 

  205. // CHECK:STDOUT:
    206. 

  206. // CHECK:STDOUT: !members:
    207. 

  207. // CHECK:STDOUT:   .Self = constants.%C
    208. 

  208. // CHECK:STDOUT:   .F = %F.decl
    209. 

  209. // CHECK:STDOUT:   .G = %G.decl
    210. 

  210. // CHECK:STDOUT: }
    211. 

  211. // CHECK:STDOUT:
    212. 

  212. // CHECK:STDOUT: fn @F();
    213. 

  213. // CHECK:STDOUT:
    214. 

  214. // CHECK:STDOUT: fn @G[%self.param_patt: %C]();
    215. 

  215. // CHECK:STDOUT:
    216. 

  216. // CHECK:STDOUT: --- fail_extern_library_in_importer.carbon
    217. 

  217. // CHECK:STDOUT:
    218. 

  218. // CHECK:STDOUT: constants {
    219. 

  219. // CHECK:STDOUT:   %F.type: type = fn_type @F [template]
    220. 

  220. // CHECK:STDOUT:   %F: %F.type = struct_value () [template]
    221. 

  221. // CHECK:STDOUT: }
    222. 

  222. // CHECK:STDOUT:
    223. 

  223. // CHECK:STDOUT: imports {
    224. 

  224. // CHECK:STDOUT: }
    225. 

  225. // CHECK:STDOUT:
    226. 

  226. // CHECK:STDOUT: file {
    227. 

  227. // CHECK:STDOUT:   package: <namespace> = namespace [template] {
    228. 

  228. // CHECK:STDOUT:     .F = invalid
    229. 

  229. // CHECK:STDOUT:   }
    230. 

  230. // CHECK:STDOUT:   %default.import = import <none>
    231. 

  231. // CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [template = constants.%F] {} {}
    232. 

  232. // CHECK:STDOUT: }
    233. 

  233. // CHECK:STDOUT:
    234. 

  234. // CHECK:STDOUT: extern fn @F() [from "basic.carbon"];
    235. 

  235. // CHECK:STDOUT:
    236.