1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo |
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3 | // |
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4 | // The contents of this file are covered under the licence agreement in the |
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5 | // file "LICENCE" distributed with Cforall. |
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6 | // |
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7 | // GenericSubstitution.cpp -- |
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8 | // |
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9 | // Author : Aaron B. Moss |
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10 | // Created On : Wed May 22 14:15:00 2019 |
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11 | // Last Modified By : Aaron B. Moss |
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12 | // Created On : Wed May 22 14:15:00 2019 |
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13 | // Update Count : 1 |
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14 | // |
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15 | |
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16 | #include "GenericSubstitution.hpp" |
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17 | |
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18 | #include <cassert> |
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19 | #include <utility> // for move |
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20 | |
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21 | #include "Decl.hpp" |
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22 | #include "Node.hpp" // for maybe_accept |
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23 | #include "Pass.hpp" |
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24 | #include "Type.hpp" |
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25 | #include "TypeSubstitution.hpp" |
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26 | |
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27 | namespace ast { |
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28 | |
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29 | namespace { |
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30 | struct GenericSubstitutionBuilder : public WithShortCircuiting { |
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31 | TypeSubstitution sub; |
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32 | |
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33 | void previsit( const Type * ) { |
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34 | // allow empty substitution for non-generic type |
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35 | visit_children = false; |
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36 | } |
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37 | |
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38 | void previsit( const ReferenceType * ) { |
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39 | // do nothing; allows substitution from base type |
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40 | } |
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41 | |
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42 | private: |
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43 | // make substitution for generic type |
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44 | void makeSub( const ReferenceToType * ty ) { |
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45 | visit_children = false; |
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46 | const AggregateDecl * aggr = ty->aggr(); |
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47 | sub = TypeSubstitution{ aggr->params.begin(), aggr->params.end(), ty->params.begin() }; |
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48 | } |
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49 | |
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50 | public: |
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51 | void previsit( const StructInstType * ty ) { |
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52 | makeSub( ty ); |
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53 | } |
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54 | |
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55 | void previsit( const UnionInstType * ty ) { |
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56 | makeSub( ty ); |
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57 | } |
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58 | }; |
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59 | } |
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60 | |
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61 | TypeSubstitution genericSubstitution( const Type * ty ) { |
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62 | Pass<GenericSubstitutionBuilder> builder; |
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63 | maybe_accept( ty, builder ); |
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64 | return std::move(builder.core.sub); |
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65 | } |
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66 | |
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67 | } |
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68 | |
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69 | // Local Variables: // |
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70 | // tab-width: 4 // |
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71 | // mode: c++ // |
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72 | // compile-command: "make install" // |
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73 | // End: // |
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