diff options
Diffstat (limited to 'gcc/go/gofrontend/expressions.cc')
-rw-r--r-- | gcc/go/gofrontend/expressions.cc | 110 |
1 files changed, 19 insertions, 91 deletions
diff --git a/gcc/go/gofrontend/expressions.cc b/gcc/go/gofrontend/expressions.cc index aadca97..00d35a9 100644 --- a/gcc/go/gofrontend/expressions.cc +++ b/gcc/go/gofrontend/expressions.cc @@ -3352,97 +3352,7 @@ class Find_named_object : public Traverse bool found_; }; -// A reference to a const in an expression. - -class Const_expression : public Expression -{ - public: - Const_expression(Named_object* constant, Location location) - : Expression(EXPRESSION_CONST_REFERENCE, location), - constant_(constant), type_(NULL), seen_(false) - { } - - Named_object* - named_object() - { return this->constant_; } - - const Named_object* - named_object() const - { return this->constant_; } - - // Check that the initializer does not refer to the constant itself. - void - check_for_init_loop(); - - protected: - int - do_traverse(Traverse*); - - Expression* - do_lower(Gogo*, Named_object*, Statement_inserter*, int); - - bool - do_is_constant() const - { return true; } - - bool - do_is_zero_value() const - { return this->constant_->const_value()->expr()->is_zero_value(); } - - bool - do_is_static_initializer() const - { return true; } - - bool - do_numeric_constant_value(Numeric_constant* nc) const; - - bool - do_string_constant_value(std::string* val) const; - - bool - do_boolean_constant_value(bool* val) const; - - Type* - do_type(); - - // The type of a const is set by the declaration, not the use. - void - do_determine_type(const Type_context*); - - void - do_check_types(Gogo*); - - Expression* - do_copy() - { return this; } - - Bexpression* - do_get_backend(Translate_context* context); - - int - do_inlining_cost() const - { return 1; } - - // When exporting a reference to a const as part of a const - // expression, we export the value. We ignore the fact that it has - // a name. - void - do_export(Export_function_body* efb) const - { this->constant_->const_value()->expr()->export_expression(efb); } - - void - do_dump_expression(Ast_dump_context*) const; - - private: - // The constant. - Named_object* constant_; - // The type of this reference. This is used if the constant has an - // abstract type. - Type* type_; - // Used to prevent infinite recursion when a constant incorrectly - // refers to itself. - mutable bool seen_; -}; +// Class Const_expression. // Traversal. @@ -3454,6 +3364,14 @@ Const_expression::do_traverse(Traverse* traverse) return TRAVERSE_CONTINUE; } +// Whether this is the zero value. + +bool +Const_expression::do_is_zero_value() const +{ + return this->constant_->const_value()->expr()->is_zero_value(); +} + // Lower a constant expression. This is where we convert the // predeclared constant iota into an integer value. @@ -3708,6 +3626,16 @@ Const_expression::do_get_backend(Translate_context* context) return expr->get_backend(context); } +// When exporting a reference to a const as part of a const +// expression, we export the value. We ignore the fact that it has +// a name. + +void +Const_expression::do_export(Export_function_body* efb) const +{ + this->constant_->const_value()->expr()->export_expression(efb); +} + // Dump ast representation for constant expression. void |