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annotate anagram/support/agcstack.cpp @ 6:607e3be6bad8

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Adjust to the moving target called the C++ standard. Apparently nowadays it's not allowed to define an explicit copy constructor but not an assignment operator. Consequently, defining the explicit copy constructor in terms of the implicit/automatic assignment operator for general convenience no longer works. Add assignment operators. Caution: not tested with the IBM compiler, but there's no particular reason it shouldn't work.
author David A. Holland
date Mon, 30 May 2022 23:46:22 -0400
parents 13d2b8934445
children
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1 /*
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2 * AnaGram, A System for Syntax Directed Programming
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3 * Copyright 1997-2002 Parsifal Software. All Rights Reserved.
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4 * See the file COPYING for license and usage terms.
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5 *
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6 * agcstk.cpp - character stack
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7 */
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8
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9 #include "agcstack.h"
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10 #include "assert.h"
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11
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12 //#define INCLUDE_LOGGING
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13 #include "log.h"
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14
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15
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16 AgString AgCharStack::popString(unsigned n) {
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17 LOGSECTION("AgCharStack::popString(unsigned)");
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18 assert(n <= size());
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19 LOGV(size());
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20 LOGV(n);
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21 AgString result(n);
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22 char *p = result.pointer();
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23 while (n--) {
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24 p[n] = pop();
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25 }
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26 return result;
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27 }
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28
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29 AgString AgCharStack::popString() {
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30 LOGSECTION("AgCharStack::popString");
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31 unsigned n = size();
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32 LOGV(size());
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33 LOGV(n);
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34 AgString result(n);
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35 char *p = result.pointer();
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36 while (n--) {
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37 p[n] = pop();
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38 }
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39 return result;
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40 }
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41
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42 AgCharStack &AgCharStack::push(const char *s) {
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43 while (*s) {
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44 push(*s++);
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45 }
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46 return *this;
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47 }
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48
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49 AgCharStack &AgCharStack::push(const char *s, unsigned n) {
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50 for (unsigned i = 0; i < n; i++) {
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51 push(s[i]);
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52 }
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53 return *this;
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54 }
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55
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56
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57 AgCharStack &AgCharStack::operator << (AgString s) {
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58 int n = s.size();
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59 char *p = s.pointer();
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60 while (n--) {
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61 (*this) << *p++;
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62 }
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63 return *this;
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64 }
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65
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66 AgCharStack &AgCharStack::operator << (const char *s) {
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67 if (s) {
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68 while (*s) {
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69 push(*s++);
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70 }
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71 }
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72 return *this;
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73 }