smallest_cpp03_generator.h

/******************************************************************************
The MIT License(MIT)
 
Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com
 
Copyright(c) 2026 John Wellbelove
 
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//***************************************************************************
// THIS FILE HAS BEEN AUTO GENERATED. DO NOT EDIT THIS FILE.
//***************************************************************************
 
/*[[[cog
import cog
cog.outl("//***************************************************************************")
cog.outl("/// Template to determine the smallest type and size.")
cog.outl("/// Supports up to %s types." % NTypes)
cog.outl("/// Defines 'value_type' which is the type of the smallest parameter.")
cog.outl("/// Defines 'size' which is the size of the smallest parameter.")
cog.outl("///\\ingroup smallest")
cog.outl("//***************************************************************************")
cog.out("template <typename T1, ")
for n in range(2, int(NTypes)):
    cog.out("typename T%s = void, " % n)
    if n % 4 == 0:
        cog.outl("")
        cog.out("          ")
cog.outl("typename T%s = void>" % int(NTypes))
cog.outl("struct smallest_type")
cog.outl("{")
cog.outl("private:")
cog.outl("")
cog.outl("  // Declaration.")
cog.outl("  template <bool Boolean, typename TrueType, typename FalseType>")
cog.outl("  struct choose_type;")
cog.outl("")
cog.outl("  // Specialisation for 'true'.")
cog.outl("  // Defines 'type' as 'TrueType'.")
cog.outl("  template <typename TrueType, typename FalseType>")
cog.outl("  struct choose_type<true, TrueType, FalseType>")
cog.outl("  {")
cog.outl("    typedef TrueType type;")
cog.outl("  };")
cog.outl("")
cog.outl("  // Specialisation for 'false'. ")
cog.outl("  // Defines 'type' as 'FalseType'.")
cog.outl("  template <typename TrueType, typename FalseType>")
cog.outl("  struct choose_type<false, TrueType, FalseType>")
cog.outl("  {")
cog.outl("    typedef FalseType type;")
cog.outl("  };")
cog.outl("")
cog.outl("public:")
cog.outl("")
cog.outl("  // Define 'smallest_other' as 'smallest_type' with all but the first parameter. ")
cog.out("  typedef typename smallest_type<")
for n in range(2, int(NTypes)):
    cog.out("T%s, " % n)
    if n % 16 == 0:
        cog.outl("")
        cog.out("                                ")
cog.outl("T%s>::type smallest_other;" % int(NTypes))
cog.outl("")
cog.outl("  // Set 'type' to be the smallest of the first parameter and any of the others.")
cog.outl("  // This is recursive.")
cog.outl("  typedef typename choose_type<(sizeof(T1) < sizeof(smallest_other)), // Boolean")
cog.outl("                                T1,                                   // TrueType")
cog.outl("                                smallest_other>                       // FalseType")
cog.outl("                                ::type type;                          // The smallest type of the two.")
cog.outl("")
cog.outl("  // The size of the smallest type.")
cog.outl("  enum")
cog.outl("  {")
cog.outl("    size = sizeof(type)")
cog.outl("  };")
cog.outl("};")
cog.outl("")
cog.outl("//***************************************************************************")
cog.outl("// Specialisation for one template parameter.")
cog.outl("//***************************************************************************")
cog.outl("template <typename T1>")
cog.out("struct smallest_type<T1,   ")
for n in range(2, int(NTypes)):
    cog.out("void, ")
    if n % 8 == 0:
        cog.outl("")
        cog.out("                     ")
cog.outl("void>")
cog.outl("{")
cog.outl("  typedef T1 type;")
cog.outl("")
cog.outl("  enum")
cog.outl("  {")
cog.outl("    size = sizeof(type)")
cog.outl("  };")
cog.outl("};")
]]]*/
/*[[[end]]]*/