annotate tests/agcl/ffcalc/ffcm-a.syn @ 22:5581ef01f993

Regen all the AG output. This also fixes the line number output in the tools (cgbigen/helpgen/help2html), apparently because those files weren't regenerated last go.
author David A. Holland
date Mon, 13 Jun 2022 00:06:39 -0400
parents 13d2b8934445
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 {/* FOUR FUNCTION CALCULATOR: FFCALC.SYN */}
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2
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3 // -- CONFIGURATION SECTION ----------------------------
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4 [
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5 default token type = double
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6 disregard white space
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7 lexeme { real}
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8 traditional engine
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9 ]
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10
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11 // -- FOUR FUNCTION CALCULATOR -------------------------
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12 (void) calculator $
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13 -> [statement, '\n']..., eof
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14
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15 (void) calculation
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16 -> expression:x =printf("%g\n",x);
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17 -> name:n, '=', expression:x ={
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18 printf("%c = %g\n",n+'A',value[n]=x);}
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19 -> error
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20
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21 expression
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22 -> term
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23 -> expression:x, '+', term:t = x+t;
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24 -> expression:x, '-', term:t = x-t;
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25
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26 term
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27 -> factor:f
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28 -> term:t, '*', factor:f = t*f;
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29 -> term:t, '/', factor:f = t/f;
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30
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31 factor
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32 -> identifier:n = value[n];
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33 -> real
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34 -> '(', expression:x, ')' = x;
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35 -> '-', factor:f = -f;
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36
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37 identifier
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38 ->
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39
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40 // -- LEXICAL UNITS ------------------------------------
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41 digit = '0-9'
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42 eof = -1
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43
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44 (void) white space
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45 -> ' ' + '\t' + '\r' + '\f' + '\v'
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46 -> "/*", ~eof?..., "*/"
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47
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48 (int) name
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49 -> 'a-z' + 'A-Z':c = c-'A';
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50
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51 real
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52 -> integer part:i, '.', fraction part:f = i+f;
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53 -> integer part, '.'?
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54 -> '.', fraction part:f = f;
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55
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56 integer part
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57 -> digit:d = d-'0';
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58 -> integer part:x, digit:d = 10*x + d-'0';
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59
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60 fraction part
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61 -> digit:d =(d-'0')/10.;
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62 -> digit:d, fraction part:f =(d-'0' + f)/10.;
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63
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64 name
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65 -> letter: c =n_chars = 0, name[n_chars++]=c;
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66 -> name, letter+digit: c =name[n_chars++]=c;
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67
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68 { /* -- EMBEDDED C ---------------------------------- */
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69 double value[64]; /* registers */
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70 void main(void) {
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71 ffcalc();
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72 }
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73 } // -- END OF EMBEDDED C ------------------------------