| 1 | /*
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| 2 | * Copyright (c) 2010 Jiri Svoboda
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @file Error classes (used with exception handling). */
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| 30 |
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| 31 | #include <assert.h>
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| 32 | #include "../builtin.h"
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| 33 | #include "../mytypes.h"
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| 34 | #include "../symbol.h"
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| 35 |
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| 36 | #include "bi_error.h"
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| 37 |
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| 38 | /** Declare error class hierarchy.
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| 39 | *
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| 40 | * @param bi Builtin object
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| 41 | */
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| 42 | void bi_error_declare(builtin_t *bi)
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| 43 | {
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| 44 | /*
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| 45 | * Declare class Error and its subclasses.
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| 46 | * Here, class Error supplants a package or namespace.
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| 47 | */
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| 48 |
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| 49 | builtin_code_snippet(bi,
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| 50 | "class Error is\n"
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| 51 | " -- Common ancestor of all error classes\n"
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| 52 | " class Base is\n"
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| 53 | " end\n"
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| 54 | " -- Accessing nil reference\n"
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| 55 | " class NilReference : Base is\n"
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| 56 | " end\n"
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| 57 | " -- Array index out of bounds\n"
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| 58 | " class OutOfBounds : Base is\n"
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| 59 | " end\n"
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| 60 | "end\n");
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| 61 | }
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| 62 |
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| 63 | /** Bind error class hierarchy.
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| 64 | *
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| 65 | * @param bi Builtin object
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| 66 | */
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| 67 | void bi_error_bind(builtin_t *bi)
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| 68 | {
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| 69 | stree_symbol_t *sym;
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| 70 |
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| 71 | /* Declare class Error and its subclasses. */
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| 72 |
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| 73 | sym = builtin_find_lvl1(bi, "Error", "OutOfBounds");
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| 74 | bi->error_outofbounds = symbol_to_csi(sym);
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| 75 | assert(bi->error_outofbounds != NULL);
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| 76 |
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| 77 | sym = builtin_find_lvl1(bi, "Error", "NilReference");
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| 78 | bi->error_nilreference = symbol_to_csi(sym);
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| 79 | assert(bi->error_nilreference != NULL);
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| 80 | }
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