[296b2be] | 1 | #pragma once |
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| 2 | |
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| 3 | //------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| 4 | // Deep magic (a.k.a template meta programming) to make the templated visitor work |
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| 5 | // Basically the goal is to make 2 previsit_impl |
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| 6 | // 1 - Use when a pass implements a valid previsit. This uses overloading which means the any overload of |
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| 7 | // 'pass.previsit( node )' that compiles will be used for that node for that type |
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| 8 | // This requires that this option only compile for passes that actually define an appropriate visit. |
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| 9 | // SFINAE will make sure the compilation errors in this function don't halt the build. |
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| 10 | // See http://en.cppreference.com/w/cpp/language/sfinae for details on SFINAE |
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| 11 | // 2 - Since the first implementation might not be specilizable, the second implementation exists and does nothing. |
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| 12 | // This is needed only to eliminate the need for passes to specify any kind of handlers. |
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| 13 | // The second implementation only works because it has a lower priority. This is due to the bogus last parameter. |
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| 14 | // The second implementation takes a long while the first takes an int. Since the caller always passes an literal 0 |
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| 15 | // the first implementation takes priority in regards to overloading. |
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| 16 | // Mutator functions work along the same principal |
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| 17 | //------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| 18 | // Visit |
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| 19 | template<typename pass_type, typename node_type> |
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[d7dc824] | 20 | static inline auto previsit_impl( pass_type& pass, node_type * node, __attribute__((unused)) int unused ) -> decltype( pass.previsit( node ), void() ) { |
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[296b2be] | 21 | pass.previsit( node ); |
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| 22 | } |
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| 23 | |
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| 24 | template<typename pass_type, typename node_type> |
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[b3c36f4] | 25 | static inline void previsit_impl( __attribute__((unused)) pass_type& pass, __attribute__((unused)) node_type * node, __attribute__((unused)) long unused ) {} |
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[296b2be] | 26 | |
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| 27 | |
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| 28 | template<typename pass_type, typename node_type> |
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[d7dc824] | 29 | static inline auto postvisit_impl( pass_type& pass, node_type * node, __attribute__((unused)) int unused ) -> decltype( pass.postvisit( node ), void() ) { |
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[296b2be] | 30 | pass.postvisit( node ); |
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| 31 | } |
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| 32 | |
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| 33 | template<typename pass_type, typename node_type> |
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[b3c36f4] | 34 | static inline void postvisit_impl( __attribute__((unused)) pass_type& pass, __attribute__((unused)) node_type * node, __attribute__((unused)) long unused ) {} |
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[296b2be] | 35 | |
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| 36 | // Mutate |
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| 37 | template<typename pass_type, typename node_type> |
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[d7dc824] | 38 | static inline auto premutate_impl( pass_type& pass, node_type * node, __attribute__((unused)) int unused ) -> decltype( pass.premutate( node ), void() ) { |
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[296b2be] | 39 | return pass.premutate( node ); |
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| 40 | } |
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| 41 | |
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| 42 | template<typename pass_type, typename node_type> |
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[b3c36f4] | 43 | static inline void premutate_impl( __attribute__((unused)) pass_type& pass, __attribute__((unused)) node_type * node, __attribute__((unused)) long unused ) {} |
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[296b2be] | 44 | |
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| 45 | |
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| 46 | template<typename return_type, typename pass_type, typename node_type> |
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[d7dc824] | 47 | static inline auto postmutate_impl( pass_type& pass, node_type * node, __attribute__((unused)) int unused ) -> decltype( pass.postmutate( node ) ) { |
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[296b2be] | 48 | return pass.postmutate( node ); |
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| 49 | } |
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| 50 | |
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| 51 | template<typename return_type, typename pass_type, typename node_type> |
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| 52 | static inline return_type postmutate_impl( __attribute__((unused)) pass_type& pass, node_type * node, __attribute__((unused)) long unused ) { return node; } |
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| 53 | |
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| 54 | // Begin/End scope |
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| 55 | template<typename pass_type> |
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[d7dc824] | 56 | static inline auto begin_scope_impl( pass_type& pass, __attribute__((unused)) int unused ) -> decltype( pass.beginScope(), void() ) { |
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[296b2be] | 57 | pass.beginScope(); |
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| 58 | } |
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| 59 | |
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| 60 | template<typename pass_type> |
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| 61 | static inline void begin_scope_impl( __attribute__((unused)) pass_type& pass, __attribute__((unused)) long unused ) {} |
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| 62 | |
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| 63 | |
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| 64 | template<typename pass_type> |
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[d7dc824] | 65 | static inline auto end_scope_impl( pass_type& pass, __attribute__((unused)) int unused ) -> decltype( pass.endScope(), void() ) { |
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[296b2be] | 66 | pass.endScope(); |
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| 67 | } |
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| 68 | |
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| 69 | template<typename pass_type> |
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[3fb9a83] | 70 | static inline void end_scope_impl( __attribute__((unused)) pass_type& pass, __attribute__((unused)) long unused ) {} |
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| 71 | |
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[134322e] | 72 | // Fields |
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[b3c36f4] | 73 | #define FIELD_PTR( type, name ) \ |
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| 74 | template<typename pass_type> \ |
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[d7dc824] | 75 | static inline auto name##_impl( pass_type& pass, __attribute__((unused)) int unused ) -> decltype( &pass.name ) { return &pass.name; } \ |
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[b3c36f4] | 76 | \ |
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| 77 | template<typename pass_type> \ |
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[134322e] | 78 | static inline type * name##_impl( __attribute__((unused)) pass_type& pass, __attribute__((unused)) long unused ) { return nullptr;} \ |
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| 79 | |
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| 80 | FIELD_PTR( TypeSubstitution *, env ) |
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| 81 | FIELD_PTR( std::list< Statement* >, stmtsToAddBefore ) |
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[7b13aeb] | 82 | FIELD_PTR( std::list< Statement* >, stmtsToAddAfter ) |
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| 83 | FIELD_PTR( bool, skip_children ) |
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