source:
tests/fallthrough.cfa@
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| 1 | // |
| 2 | // Cforall Version 1.0.0 Copyright (C) 2018 University of Waterloo |
| 3 | // |
| 4 | // The contents of this file are covered under the licence agreement in the |
| 5 | // file "LICENCE" distributed with Cforall. |
| 6 | // |
| 7 | // fallthrough.cfa -- |
| 8 | // |
| 9 | // Author : Rob Schluntz |
| 10 | // Created On : Wed Mar 14 10:06:25 2018 |
| 11 | // Last Modified By : Peter A. Buhr |
| 12 | // Last Modified On : Mon Dec 24 11:24:35 2018 |
| 13 | // Update Count : 22 |
| 14 | // |
| 15 | |
| 16 | #include <fstream.hfa> |
| 17 | |
| 18 | void test(int choice) { |
| 19 | choose ( choice ) { |
| 20 | case 1: |
| 21 | sout | "case 1"; |
| 22 | fallthru; |
| 23 | case 2: |
| 24 | sout | "case 2"; |
| 25 | fallthru; |
| 26 | sout | "did not fallthru"; |
| 27 | if ( 7 ) fallthru common2; |
| 28 | fallthru common1; |
| 29 | case 3: |
| 30 | sout | "case 3"; |
| 31 | fallthru default; |
| 32 | fallthru common1; |
| 33 | common1: |
| 34 | sout | "common1"; |
| 35 | // break |
| 36 | case 4: |
| 37 | sout | "case 4"; |
| 38 | fallthru common2; |
| 39 | case 5: |
| 40 | sout | "case 5"; |
| 41 | fallthru common2; |
| 42 | fallthru default; |
| 43 | case 6: |
| 44 | sout | "case 6"; |
| 45 | fallthru common2; |
| 46 | common2: |
| 47 | sout | "common2"; |
| 48 | // break |
| 49 | default: |
| 50 | sout | "default"; |
| 51 | fallthru; |
| 52 | } // choose |
| 53 | |
| 54 | sout | nl; |
| 55 | |
| 56 | switch ( choice ) { |
| 57 | case 1: |
| 58 | sout | "case 1"; |
| 59 | switch ( choice ) { |
| 60 | case 1: |
| 61 | sout | "case 1"; |
| 62 | for ( int i = 0; i < 4; i += 1 ) { |
| 63 | sout | i; |
| 64 | if ( i == 2 ) fallthru common; |
| 65 | } // for |
| 66 | } // switch |
| 67 | break; |
| 68 | case 5: |
| 69 | sout | "case 5"; |
| 70 | if ( choice == 5 ) { |
| 71 | if ( choice != 5 ) { |
| 72 | sout | "error"; |
| 73 | } else { |
| 74 | sout | "check"; |
| 75 | fallthru common; |
| 76 | } // if |
| 77 | } // if |
| 78 | common: |
| 79 | sout | "common"; |
| 80 | fallthru; |
| 81 | break; |
| 82 | default: |
| 83 | sout | "default"; |
| 84 | fallthru; |
| 85 | } // switch |
| 86 | |
| 87 | #if ERR1 |
| 88 | // ERROR: fallthrough must be enclosed in switch or choose |
| 89 | fallthru; |
| 90 | // ERROR: fallthrough must be enclosed in switch or choose |
| 91 | fallthru common4; |
| 92 | // ERROR: fallthrough must be enclosed in switch or choose |
| 93 | fallthru default; |
| 94 | choose ( 3 ) { |
| 95 | case 2: |
| 96 | for () { |
| 97 | choose ( 2 ) { |
| 98 | case 1: |
| 99 | // ERROR: default is later, but in a different switch |
| 100 | fallthru default; |
| 101 | // ERROR: common3 is later, but not at the same level as a case clause |
| 102 | fallthru common3; |
| 103 | } |
| 104 | common3: ; |
| 105 | } // for |
| 106 | default: |
| 107 | case 1: |
| 108 | common4: |
| 109 | // ERROR: attempt to jump up with fallthrough |
| 110 | if ( 7 ) fallthru common4; |
| 111 | // ERROR: attempt to jump up with fallthrough |
| 112 | fallthru default; |
| 113 | } // choose |
| 114 | #endif |
| 115 | } |
| 116 | |
| 117 | int main() { |
| 118 | test( 1 ); |
| 119 | sout | nl; |
| 120 | test( 5 ); |
| 121 | } |
| 122 | |
| 123 | // Local Variables: // |
| 124 | // tab-width: 4 // |
| 125 | // compile-command: "cfa fallthrough.cfa" // |
| 126 | // End: // |
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