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annotate trunk/src/dil/semantic/Interpreter.d @ 691:276e2866f5fd

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Added static interpret() method to Interpreter.
author Aziz K?ksal <aziz.koeksal@gmail.com>
date Tue, 22 Jan 2008 18:05:37 +0100
parents f14cd41fc87d
children 56100b270897
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1 /++
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2 Author: Aziz Köksal
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3 License: GPL3
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4 +/
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5 module dil.semantic.Interpreter;
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6
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7 import dil.ast.Visitor;
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8 import dil.ast.Node,
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9 dil.ast.Declarations,
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10 dil.ast.Expressions,
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11 dil.ast.Statements,
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12 dil.ast.Types,
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13 dil.ast.Parameters;
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14
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15 import dil.semantic.Symbol,
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16 dil.semantic.Symbols,
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17 dil.semantic.Scope,
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18 dil.semantic.Types;
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19 import dil.Information;
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20
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21 class Interpreter : Visitor
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22 {
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23 Scope scop;
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24 InfoManager infoMan;
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25
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26 static class Result : Expression
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27 {
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28 }
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29
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30 static const Result CantInterpret;
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31
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32 static this()
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33 {
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34 CantInterpret = new Result;
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35 CantInterpret.type = Types.Error;
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36 }
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37
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38 static Expression interpret(Expression e, InfoManager infoMan, Scope scop)
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39 {
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40 return (new Interpreter(scop, infoMan)).start(e);
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41 }
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42
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43 this(Scope scop, InfoManager infoMan)
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44 {
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45 this.scop = scop;
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46 this.infoMan = infoMan;
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47 }
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48
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49 /// Start interpretation.
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50 Expression start(Expression e)
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51 {
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52 return e;
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53 }
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54
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55 bool isImmutable(Expression e)
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56 {
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57 switch (e.kind)
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58 {
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59 alias NodeKind NK;
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60 case NK.IntExpression, NK.RealExpression,
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61 NK.ComplexExpression, NK.CharExpression,
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62 NK.BoolExpression, NK.StringExpression:
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63 return true;
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64 default:
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65 return false;
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66 }
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67 }
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68 }