50     int which() const { return expr.which(); }  in which()
54       : expr(nil()) {}  in expression_ast()
56     expression_ast(unary_op const& expr)  in expression_ast()
57       : expr(expr) {}  in expression_ast()
59     expression_ast(binary_op const& expr)  in expression_ast()
60       : expr(expr) {}  in expression_ast()
62     expression_ast(unsigned int expr)  in expression_ast()
63       : expr(expr) {}  in expression_ast()
65     expression_ast(type const& expr)  in expression_ast()
66       : expr(expr) {}  in expression_ast()
73     type expr;  member
81     inline T get(expression_ast const& expr)  in get()  argument
83         return boost::get<T>(expr.expr);  in get()
136     expr = binary_op('+', expr, rhs);  in operator +=()
142     expr = binary_op('-', expr, rhs);  in operator -=()
148     expr = binary_op('*', expr, rhs);  in operator *=()
154     expr = binary_op('/', expr, rhs);  in operator /=()
168     expression_ast operator()(expression_ast const& expr) const  in operator ()()
170         return unary_op(Op, expr);  in operator ()()