1 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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2 | * Copyright (C) 2001 Gerwin Klein <[email protected]> *
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3 | * Copyright (C) 2001 Bernhard Rumpe <[email protected]> *
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4 | * All rights reserved. *
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5 | * *
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6 | * This program is free software; you can redistribute it and/or modify *
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7 | * it under the terms of the GNU General Public License. See the file *
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8 | * COPYRIGHT for more information. *
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9 | * *
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10 | * This program is distributed in the hope that it will be useful, *
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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13 | * GNU General Public License for more details. *
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14 | * *
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15 | * You should have received a copy of the GNU General Public License along *
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16 | * with this program; if not, write to the Free Software Foundation, Inc., *
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17 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
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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 | * AST node for function declarations.
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24 | *
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25 | * Also contains a reference to the symbol table of
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26 | * the paramaters and their arity.
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27 | */
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28 | class Tdekl implements AST {
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29 | Tident ident; // identifier
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30 | Tparlist parlist; // liste of parameter
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31 | Texp exp; // function body
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32 |
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33 | public Tdekl(Tident i, Tparlist p, Texp e) {
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34 | parlist=p;
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35 | ident=i;
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36 | exp=e;
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37 | }
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38 |
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39 | public String toString() {
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40 | return(ident+"("+parlist+") = \n "+exp);
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41 | }
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42 |
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43 | SymTab params; // symbol table of the parameters
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44 | int arity;
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45 |
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46 | public void setSymtab(SymTab st) {
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47 | params = new SymTab(st);
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48 | parlist.setSymtab(params,false,0);
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49 | arity = params.size();
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50 |
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51 | boolean isNew = st.enter(ident.toString(),
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52 | new STEfun(ident.toString(),this,arity));
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53 | // CoCo (Fun)
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54 | if(!isNew) Main.error("funktion "+ident+" defined twice!");
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55 | }
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56 |
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57 | public void printSymtabs() {
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58 | System.out.print("funktion "+ident.toString()+"\n"+params);
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59 | }
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60 |
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61 | public void checkcontext() {
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62 | exp.checkcontext(params); // CoCo (DefFun,DefVar,Arity)
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63 | }
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64 |
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65 | public void prepInterp(SymTab st) { // set pointers and indices
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66 | exp.prepInterp(params);
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67 | }
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68 |
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69 | public int interpret(int[] in, int[] par) {
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70 | return(exp.interpret(in,par));
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71 | }
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72 |
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73 | public int arity() { return(arity); }
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74 | }
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75 |
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