| 1 | // Testing Interactions Between Termination and Resumption
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| 2 |
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| 3 | #include <fstream.hfa>
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| 4 | #include "except-io.hfa"
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| 5 |
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| 6 | exception star {};
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| 7 | exception moon {};
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| 8 |
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| 9 | vtable(star) star_vt;
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| 10 | vtable(moon) moon_vt;
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| 11 |
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| 12 | int main(int argc, char * argv[]) {
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| 13 | // Resume falls back to terminate.
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| 14 | try {
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| 15 | throwResume (star){&star_vt};
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| 16 | } catch (star *) {
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| 17 | sout | "caught as termination";
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| 18 | }
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| 19 | // Variant of the above to check timing.
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| 20 | try {
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| 21 | loud_region a = "try block with resume throw";
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| 22 | throwResume (star){&star_vt};
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| 23 | } catch (star *) {
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| 24 | sout | "caught as termination";
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| 25 | } catchResume (star *) {
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| 26 | sout | "intermediate rethrow";
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| 27 | throwResume;
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| 28 | }
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| 29 | sout | nl;
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| 30 |
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| 31 | // Resume does not catch terminate.
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| 32 | try {
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| 33 | try {
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| 34 | throw (star){&star_vt};
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| 35 | } catchResume (star *) {
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| 36 | sout | "resume catch on terminate";
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| 37 | }
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| 38 | } catchResume (star *) {
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| 39 | sout | "resume catch on terminate";
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| 40 | } catch (star *) {
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| 41 | sout | "terminate catch on terminate";
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| 42 | }
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| 43 | sout | nl;
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| 44 |
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| 45 | // Terminate does not catch resume.
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| 46 | try {
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| 47 | try {
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| 48 | throwResume (star){&star_vt};
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| 49 | } catch (star *) {
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| 50 | sout | "terminate catch on resume";
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| 51 | }
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| 52 | } catch (star *) {
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| 53 | sout | "terminate catch on resume";
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| 54 | } catchResume (star *) {
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| 55 | sout | "resume catch on resume";
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| 56 | }
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| 57 | sout | nl;
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| 58 |
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| 59 | // Resume a termination exception.
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| 60 | try {
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| 61 | try {
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| 62 | try {
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| 63 | throw (star){&star_vt};
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| 64 | } catchResume (star *) {
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| 65 | sout | "inner resume catch (error)";
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| 66 | }
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| 67 | } catch (star * error) {
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| 68 | sout | "termination catch, will resume";
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| 69 | throwResume *error;
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| 70 | }
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| 71 | } catchResume (star *) {
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| 72 | sout | "outer resume catch";
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| 73 | }
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| 74 | sout | nl;
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| 75 |
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| 76 | // Terminate a resumption exception.
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| 77 | try {
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| 78 | try {
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| 79 | try {
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| 80 | throwResume (star){&star_vt};
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| 81 | } catch (star *) {
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| 82 | sout | "inner termination catch";
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| 83 | }
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| 84 | } catchResume (star * error) {
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| 85 | sout | "resumption catch, will terminate";
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| 86 | throw *error;
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| 87 | }
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| 88 | } catch (star *) {
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| 89 | sout | "outer terminate catch (error)";
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| 90 | }
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| 91 | sout | nl;
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| 92 |
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| 93 | // Unwinding a resumption catch does not break the system.
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| 94 | try {
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| 95 | try {
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| 96 | try {
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| 97 | try {
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| 98 | sout | "throwing resume moon";
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| 99 | throwResume (moon){&moon_vt};
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| 100 | } catch (star *) {
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| 101 | sout | "termination catch";
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| 102 | }
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| 103 | sout | "throwing resume star";
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| 104 | throwResume (star){&star_vt};
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| 105 | } catchResume (star *) {
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| 106 | sout | "resumption star catch";
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| 107 | }
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| 108 | } catchResume (moon *) {
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| 109 | sout | "resumption moon catch, will terminate";
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| 110 | throw (star){&star_vt};
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| 111 | }
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| 112 | } catchResume (star *) {
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| 113 | sout | "outermost catch (error)";
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| 114 | }
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| 115 | }
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