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/*
Version 1.0 26/08/1994
Author: Sjaak Smetsers
*/
/****
internal representation for types used by the type checker
****/
STRUCT (symbol_type, SymbolType)
{
struct type_cell ** syt_args;
struct type_cell * syt_result;
/*
unsigned long syt_unspec_args;
*/
unsigned short syt_arity;
unsigned short syt_mark:1;
unsigned short syt_part_spec:1;
};
STRUCT (type_alt_info, TypeAltInfo)
{
struct recursive_call * tai_recursive_calls;
struct overloaded_function * tai_overloaded_funs;
struct internal_call * tai_internal_calls;
struct type_alt_info * tai_next;
unsigned tai_line;
};
struct lifted_arguments_info
{
struct overloaded_variable_list_elem * lai_overloaded_vars;
PolyList lai_type_vars;
PolyList lai_attribute_vars;
} ;
STRUCT (symbol_type_info,SymbolTypeInfo)
{
SymbolTypeP sti_type1;
SymbolTypeP sti_type2;
struct type_cell ** sti_overloaded_vars;
TypeAltInfo sti_type_alt_info;
union
{ struct lifted_arguments_info * sti_u_lifted_args_info;
PolyList sti_u_lifted_over_vars;
} sti_union;
} ;
#define sti_lifted_args_info sti_union.sti_u_lifted_args_info
#define sti_lifted_over_vars sti_union.sti_u_lifted_over_vars
STRUCT (type_cons_repr, TypeConsRepr)
{
SymbDef tcr_symbol;
int tcr_arity;
};
#define sdef_inf_type sdef_rule_type_info -> sti_type1
#define sdef_predef_type sdef_rule_type_info -> sti_type2
#define sdef_overloaded_vars sdef_rule_type_info -> sti_overloaded_vars
#define sdef_type_alt_info sdef_rule_type_info -> sti_type_alt_info
#define sdef_lifted_args_info sdef_rule_type_info -> sti_lifted_args_info
#define sdef_lifted_temp_over_vars sdef_rule_type_info -> sti_lifted_args_info -> lai_overloaded_vars
#define sdef_lifted_type_vars sdef_rule_type_info -> sti_lifted_args_info -> lai_type_vars
#define sdef_lifted_attr_vars sdef_rule_type_info -> sti_lifted_args_info -> lai_attribute_vars
#define sdef_lifted_over_vars sdef_rule_type_info -> sti_lifted_over_vars
#define sdef_rc_inf_type sdef_rule_cons_type_info -> sti_type1
#define sdef_rc_predef_type sdef_rule_cons_type_info -> sti_type2
typedef unsigned int AttributeCellKind;
enum
{ AC_Indirection = 0, AC_UnChanging = 0, AC_Unique, AC_Variable, AC_NotUnique
};
#define AttributeCellKindSize 2
#ifdef THINK_C
#define DAttributeCellKind(v) (\
v == AC_Indirection ? "AC_Indirection" :\
v == AC_Unique ? "AC_Unique" :\
v == AC_Variable ? "AC_Variable" :\
v == AC_NotUnique ? "AC_NotUnique" :\
"Unknown")
#endif
typedef struct plain_attr_var
{ Bool pav_mark:1;
Bool pav_exi_quanti:1;
AttributeCellKind pav_varkind:AttributeCellKindSize;
struct temp_attr_var * pav_forward;
} *PlainAttrVar;
STRUCT (attr_var_with_equatuations, AttrVarWithEquations)
{ struct
{ Bool ave_bi_mark:1;
Bool ave_bi_coercible:1;
Bool ave_bi_present_mark:1;
Bool ave_bi_printed:1;
unsigned ave_bi_number;
} ave_bitinfo;
union
{ struct temp_attr_var * ave_inf_forward;
struct simple_attr_equation * ave_inf_impl_equa;
} ave_info;
struct simple_attr_equation * ave_equations;
} ;
#define ave_mark ave_bitinfo.ave_bi_mark
#define ave_coercible ave_bitinfo.ave_bi_coercible
#define ave_present_mark ave_bitinfo.ave_bi_present_mark
#define ave_printed ave_bitinfo.ave_bi_printed
#define ave_number ave_bitinfo.ave_bi_number
#define ave_refcount ave_bitinfo.ave_bi_refcount
#define ave_offrefcount ave_bitinfo.ave_bi_offrefcount
#define ave_forward ave_info.ave_inf_forward
#define ave_impl_equa ave_info.ave_inf_impl_equa
STRUCT (attr_equation_list, AttrEquationList)
{ struct
{ Bool ae_bi_mark:1;
Bool ae_bi_implicit:1;
} ae_bitinfo;
AttrEquationList ae_nextoffered;
struct temp_attr_var * ae_offered;
union
{ struct attr_equation_list * ae_inf_nextdemanded;
AttrVarWithEquationsP ae_inf_forward;
} ae_info;
struct temp_attr_var * ae_demanded;
};
#define ae_mark ae_bitinfo.ae_bi_mark
#define ae_implicit ae_bitinfo.ae_bi_implicit
#define ae_nextdemanded ae_info.ae_inf_nextdemanded
#define ae_forward ae_info.ae_inf_forward
STRUCT (simple_attr_equation, SimpleAttrEquation)
{ Bool sae_mark:1;
AttrVarWithEquationsP sae_offattr;
struct simple_attr_equation * sae_next;
};
STRUCT (temp_attr_var, TempAttrVar)
{ Bool tav_mark: 1;
Bool tav_present: 1;
Bool tav_free: 1;
Bool tav_onstack: 1;
Bool tav_exi_quanti: 1;
Bool tav_non_coercible: 1;
AttributeCellKind tav_varkind: AttributeCellKindSize;
unsigned tav_number;
AttrEquationList tav_offered;
union
{ AttrVarWithEquationsP tav_inf_forward;
AttrEquationList tav_inf_demanded;
TempAttrVar tav_inf_indirection;
SimpleAttrEquation tav_inf_impl_equa;
} tav_info;
};
#define tav_forward tav_info.tav_inf_forward
#define tav_demanded tav_info.tav_inf_demanded
#define tav_indirection tav_info.tav_inf_indirection
#define tav_impl_equa tav_info.tav_inf_impl_equa
STRUCT (class_variable_info, ClassVariableInfo)
{
SymbolList cv_overloaded;
NodeId cv_nodeid;
};
typedef union
{ struct
{ SymbolList tv_overloaded;
union
{ struct type_cell * tv_u_forward;
TypeVar tv_u_type_var;
unsigned tv_u_number;
} tv_u;
} cc_variable;
Symbol cc_basic;
struct
{ TypeConsRepr tcc_symbol;
struct type_cell ** tcc_args;
} cc_typeconstructor;
struct
{ struct type_cell * fc_arg;
struct type_cell * fc_result;
} cc_funtype;
struct
{ struct type_cell * sc_indirect;
struct type_cell * sc_arg;
} cc_strictnessinfo;
struct
{ union
{ struct type_cell * cv_u_forward;
TypeVar cv_u_type_var;
} cv_u;
ClassVariableInfo cv_info;
} cc_classvariable;
struct
{ int cova_arity;
struct type_cell ** cova_types;
} cc_constructorvariable;
struct
{ struct type_cell * void_forward;
} cc_voidtype;
struct
{ struct type_cell * empty_forward;
} cc_emptytype;
} CellContents;
/* Don not change the order of constants in the next enumaration type */
typedef unsigned int CellKind;
enum
{ BasicType, VoidType, FunctionType, ConstructorType,
TypeVariable, ExistentialVariable, StrictnessCell,
ClassVariable, ConstructorVariable,
Indirection, EmptyType
};
#define CellKindSize 4
#ifdef THINK_C
#define DCellKind(v) (\
v == BasicType ? "BasicType" :\
v == ConstructorType ? "ConstructorType" :\
v == FunctionType ? "FunctionType" :\
v == TypeVariable ? "TypeVariable" :\
v == VoidType ? "VoidType" :\
v == StrictnessCell ? "StrictnessCell" :\
v == Indirection ? "Indirection" :\
v == ExistentialVariable ? "ExistentialVariable" :\
v == ClassVariable ? "ClassVariable" :\
v == ConstructorVariable ? "ConstructorVariable" :\
"Unknown")
#endif
#ifndef _NEW_ARRAY_
typedef unsigned int StrictCellKind;
enum
{ SC_Lazy, SC_Strict, SC_Var, SC_Indirection
};
#define StrictCellKindSize 2
#endif
#ifdef THINK_C
#define DStrictCellKind(v) (\
v == SC_Lazy ? "SC_Lazy" :\
v == SC_Strict ? "SC_Strict" :\
v == SC_Var ? "SC_Var" :\
v == SC_Indirection ? "SC_Indirection" :\
"Unknown")
#endif
typedef unsigned int AttrVarKind;
enum
{ AVK_None, AVK_Plain, AVK_Equation, AVK_Temporarily
};
#define AttrVarKindSize 2
#ifdef THINK_C
#define DAttrVarKind(v) (\
v == AVK_None ? "AVK_None" :\
v == AVK_Plain ? "AVK_Plain" :\
v == AVK_Equation ? "AVK_Equation" :\
v == AVK_Temporarily ? "AVK_Temporarily":\
"Unknown")
#endif
#define MaxInstanciationDepth 8
typedef struct
{ Bool ci_removed: 1;
Bool ci_printed: 1;
Bool ci_free: 1;
Bool ci_mark: 1;
Bool ci_expanded: 1;
Bool ci_hidden: 1;
Bool ci_overloaded: 1;
Bool ci_class_var: 1;
Bool ci_strict: 1;
Bool ci_tmp_cell: 1;
Bool ci_copy_cell: 1;
Bool ci_with_insres: 1;
Bool ci_no_match: 1;
Bool ci_non_coercible: 1;
Bool ci_default: 1;
CellKind ci_kind: CellKindSize;
AttributeCellKind ci_attrkind: AttributeCellKindSize;
AttrVarKind ci_attrvarkind:AttrVarKindSize;
unsigned ci_instdepth: MaxInstanciationDepth;
} CellInfo;
STRUCT (overloaded_type, OverloadedType)
{ TempAttrVar olt_tempvar;
struct type_cell * olt_forward;
};
typedef union
{ TempAttrVar cai_tempvar;
PlainAttrVar cai_plainvar;
AttrVarWithEquationsP cai_equvar;
struct type_cell * cai_forward;
OverloadedTypeP cai_overloadedtypes;
} CellAttrInfo;
typedef struct type_cell
{ CellInfo tc_cellinfo;
CellContents tc_contents;
CellAttrInfo tc_attrinfo;
} *TypeCell;
#define tc_kind tc_cellinfo.ci_kind
#define tc_removed tc_cellinfo.ci_removed
#define tc_free tc_cellinfo.ci_free
#define tc_mark tc_cellinfo.ci_mark
#define tc_expanded tc_cellinfo.ci_expanded
#define tc_hidden tc_cellinfo.ci_hidden
#define tc_overloaded tc_cellinfo.ci_overloaded
#define tc_class_var tc_cellinfo.ci_class_var
#define tc_printed tc_cellinfo.ci_printed
#define tc_tmp_cell tc_cellinfo.ci_tmp_cell
#define tc_copy_cell tc_cellinfo.ci_copy_cell
#define tc_strict tc_cellinfo.ci_strict
#define tc_with_insres tc_cellinfo.ci_with_insres
#define tc_no_match tc_cellinfo.ci_no_match
#define tc_non_coercible tc_cellinfo.ci_non_coercible
#define tc_default tc_cellinfo.ci_default
#ifndef _NEW_ARRAY_
#define tc_strictkind tc_cellinfo.ci_strictkind
#endif
#define tc_attrkind tc_cellinfo.ci_attrkind
#define tc_attrvarkind tc_cellinfo.ci_attrvarkind
#define tc_instdepth tc_cellinfo.ci_instdepth
#define tc_tempattrvar tc_attrinfo.cai_tempvar
#define tc_plainattrvar tc_attrinfo.cai_plainvar
#define tc_equattrvar tc_attrinfo.cai_equvar
#define tc_forward tc_attrinfo.cai_forward
#define tc_overloadedtypes tc_attrinfo.cai_overloadedtypes
#define tv_forward tv_u.tv_u_forward
#define tv_type_var tv_u.tv_u_type_var
#define tv_number tv_u.tv_u_number
#define contents_vc_number tc_contents.cc_variable.tv_number
#define contents_vc_forward tc_contents.cc_variable.tv_forward
#define contents_vc_type_var tc_contents.cc_variable.tv_type_var
#define contents_overloaded tc_contents.cc_variable.tv_overloaded
#define contents_indirect tc_contents.cc_variable.tv_forward
#define contents_basic tc_contents.cc_basic
#define contents_tc_symbol tc_contents.cc_typeconstructor.tcc_symbol
#define contents_tc_symbdef contents_tc_symbol -> tcr_symbol
#define contents_tc_arity contents_tc_symbol -> tcr_arity
#define contents_tc_args tc_contents.cc_typeconstructor.tcc_args
#define contents_ft_arg tc_contents.cc_funtype.fc_arg
#define contents_ft_result tc_contents.cc_funtype.fc_result
#define contents_si_indirect tc_contents.cc_strictnessinfo.sc_indirect
#define contents_si_arg tc_contents.cc_strictnessinfo.sc_arg
#define contents_cv_forward tc_contents.cc_classvariable.cv_u.cv_u_forward
#define contents_cv_type_var tc_contents.cc_classvariable.cv_u.cv_u_type_var
#define contents_cv_info tc_contents.cc_classvariable.cv_info
#define contents_cv_overloaded contents_cv_info -> cv_overloaded
#define contents_cv_nodeid contents_cv_info -> cv_nodeid
#define contents_cova_arity tc_contents.cc_constructorvariable.cova_arity
#define contents_cova_types tc_contents.cc_constructorvariable.cova_types
#define contents_void_forward tc_contents.cc_voidtype.void_forward
#define contents_empty_forward tc_contents.cc_emptytype.empty_forward
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