Last change
on this file since e693572 was
5546f50b,
checked in by Peter A. Buhr <pabuhr@…>, 5 months ago
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File size:
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1 | #include <fstream.hfa> |
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2 | #include <stdlib.hfa> |
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3 | #include <array.hfa> // learned has to come afer stdlib, which uses the word tag |
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4 | |
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5 | // Usage: |
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6 | // ./a.out 5 |
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7 | // example does an unchecked reference to argv[1] |
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8 | |
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9 | |
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10 | forall( [N] ) // array bound |
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11 | array(bool, N) & f( array(float, N) & a, array(float, N) & b ) { |
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12 | array(bool, N) & ret = *alloc(); // sizeof used by alloc |
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13 | for( i; N ) { |
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14 | ret[i] = 0.005 > 2 * (abs(a[i] - b[i])) / (abs(a[i]) + abs(b[i])); |
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15 | } |
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16 | return ret; |
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17 | } |
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18 | |
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19 | |
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20 | |
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21 | |
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22 | |
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23 | |
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24 | |
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25 | |
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26 | |
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27 | |
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28 | // TODO: standardize argv |
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29 | |
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30 | int main( int argc, char * argv[] ) { |
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31 | int n = ato( argv[1] ); |
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32 | array(float, n) a, b; // VLA |
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33 | for ( i; n ) { |
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34 | a[i] = 3.14 / (i + 1); |
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35 | b[i] = a[i] + 0.005 ; |
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36 | } |
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37 | array(bool, n) & result = f( a, b ); // call |
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38 | sout | "result: " | nonl; |
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39 | for ( i; n ) |
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40 | sout | result[i] | nonl; |
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41 | sout | nl; |
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42 | free( &result ); // free returned storage |
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43 | } |
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44 | /* |
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45 | $\$$ ./a.out 5 |
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46 | result: true true true false false |
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47 | $\$$ ./a.out 7 |
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48 | result: true true true false false false false |
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49 | */ |
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50 | |
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51 | void fred() { |
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52 | array(float, 10) a; |
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53 | array(float, 20) b; |
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54 | f( a, a ); |
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55 | f( b, b ); |
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56 | f( a, b ); |
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57 | } |
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58 | |
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59 | #ifdef SHOWERR1 |
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60 | forall( [M], [N] ) |
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61 | void bad( array(float, M) &a, array(float, N) &b ) { |
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62 | f( a, a ); // ok |
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63 | f( b, b ); // ok |
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64 | f( a, b ); // error |
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65 | } |
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66 | #endif |
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67 | |
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68 | |
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69 | |
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70 | forall( [M], [N] ) |
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71 | void bad_fixed( array(float, M) & a, array(float, N) & b ) { |
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72 | if ( M == N ) { |
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73 | f( a, (array(float, M) &)b ); // cast b to matching type |
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74 | } |
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75 | } |
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