
// // Copyright (c) 2006, Brian Frank and Andy Frank // Licensed under the Academic Free License version 3.0 // // History: // 26 Jul 06 Brian Frank Creation // ** ** GenericType models a parameterized generic type: List, Map, or Func ** abstract class GenericType : CType { ////////////////////////////////////////////////////////////////////////// // Construction ////////////////////////////////////////////////////////////////////////// new make(CType base) { this.base = base } ////////////////////////////////////////////////////////////////////////// // CType ////////////////////////////////////////////////////////////////////////// override CNamespace ns() { return base.ns } override CPod pod() { return ns.sysPod } override Str name() { return base.name } override Str qname() { return base.qname } override Int flags() { return 0 } override Bool isGeneric() { return false } override Bool isParameterized() { return true } override ListType toListOf() { if (listOf == null) listOf = ListType.make(this) return listOf } override CType[] mixins() { return CType[,] } override Str:CSlot slots { get { if (@slots == null) @slots = parameterizeSlots() return @slots } } override Str toStr() { return signature() } ////////////////////////////////////////////////////////////////////////// // Parameterize ////////////////////////////////////////////////////////////////////////// private Str:CSlot parameterizeSlots() { s := Str:CSlot[:] base.slots.map(s) |CSlot slot->Obj| { return parameterizeSlot(slot) } return s } private CSlot parameterizeSlot(CSlot slot) { m := slot as CMethod if (m == null) return slot if (!m.isGeneric) return slot return ParameterizedMethod.make(this, m) } internal CType parameterize(CType t) { if (!t.isGenericParameter) return t if (t is ListType) return parameterizeListType((ListType)t) if (t is FuncType) return parameterizeFuncType((FuncType)t) if (t.name.size != 1) throw CompilerErr.make("Cannot parameterize $t.qname", null) return doParameterize(t.name[0]) } private CType parameterizeListType(ListType t) { return parameterize(t.v).toListOf } private CType parameterizeFuncType(FuncType t) { params := (CType[])t.params.map(CType[,]) |CType p->CType| { return parameterize(p) } ret := parameterize(t.ret) return FuncType.make(params, t.names, ret) } abstract CType doParameterize(Int ch) ////////////////////////////////////////////////////////////////////////// // Fields ////////////////////////////////////////////////////////////////////////// override readonly CType base private ListType listOf } ************************************************************************** ** ListType ************************************************************************** ** ** ListType models a parameterized List type. ** class ListType : GenericType { new make(CType v) : super(v.ns.listType) { this.v = v this.signature = "${v.signature}[]" } override Bool isGenericParameter() { return v.isGenericParameter } override Bool fits(CType t) { if (this == t) return true if (t.signature == "sys::List") return true if (t.isObj) return true if (t.name.size == 1 && t.pod.name == "sys") return true that := t.deref as ListType if (that == null) return false return v.fits(that.v) } override CType doParameterize(Int ch) { switch (ch) { case 'V': return v case 'L': return this default: throw Err.make(ch.toChar) } } readonly CType v // value type override readonly Str signature // v[] } ************************************************************************** ** MapType ************************************************************************** ** ** MapType models a parameterized Map type. ** class MapType : GenericType { new make(CType k, CType v) : super(k.ns.mapType) { this.k = k this.v = v this.signature = "[${k.signature}:${v.signature}]" } override Bool isGenericParameter() { return k.isGenericParameter || v.isGenericParameter } override Bool fits(CType t) { if (this == t) return true if (t.signature == "sys::Map") return true if (t.isObj) return true if (t.name.size == 1 && t.pod.name == "sys") return true that := t.deref as MapType if (that == null) return false return k.fits(that.k) && v.fits(that.v) } override CType doParameterize(Int ch) { switch (ch) { case 'K': return k case 'V': return v case 'M': return this default: throw Err.make(ch.toChar) } } readonly CType k // keytype readonly CType v // value type override readonly Str signature // [k:v] } ************************************************************************** ** FuncType ************************************************************************** ** ** FuncType models a parameterized Func type. ** class FuncType : GenericType { new make(CType[] params, Str[] names, CType ret) : super(ret.ns.funcType) { this.params = params this.names = names this.ret = ret this.isGenericParameter = ret.isGenericParameter s := StrBuf.make.add("|") params.each |CType p, Int i| { isGenericParameter |= p.isGenericParameter if (i > 0) s.add(","); s.add(p.signature) } s.add("->").add(ret.signature).add("|") this.signature = s.toStr } override Bool fits(CType t) { if (this == t) return true if (t.signature == "sys::Func") return true if (t.isObj) return true if (t.name.size == 1 && t.pod.name == "sys") return true that := t.deref as FuncType if (that == null) return false // match return type (if void is needed, anything matches) if (!that.ret.isVoid && !ret.fits(that.ret)) return false // match params - it is ok for me to have less than // the type params (if I want to ignore them), but I // must have no more if (params.size > that.params.size) return false for (i:=0; i<params.size; ++i) if (!that.params[i].fits(params[i])) return false // this method works for the specified method type return true; } ParamDef[] toParamDefs(Location loc) { p := ParamDef[,] p.size = params.size for (i:=0; i<params.size; ++i) { p[i] = ParamDef.make(loc, params[i], names[i]) } return p } override CType doParameterize(Int ch) { if ('A' <= ch && ch <= 'H') { index := ch - 'A' if (index < params.size) return params[index] return ns.objType } switch (ch) { case 'R': return ret default: throw Err.make(ch.toChar) } } readonly CType[] params // a, b, c ... readonly Str[] names // parameter names readonly CType ret // return type override readonly Str signature // |a,b..n->r| override readonly Bool isGenericParameter } ************************************************************************** ** GenericParameterType ************************************************************************** ** ** GenericParameterType models the generic parameter types ** sys::V, sys::K, etc. ** class GenericParameterType : CType { new make(CNamespace ns, Str name) { this.ns = ns this.name = name this.qname = "sys::$name" } override CNamespace ns override CPod pod() { return ns.sysPod } override Str name override Str qname override Str signature() { return qname } override Int flags() { return 0 } override Bool isGeneric() { return false } override Bool isParameterized() { return false } override Bool isGenericParameter() { return true } override ListType toListOf() { if (listOf == null) listOf = ListType.make(this); return listOf } override CType base() { return ns.objType } override CType[] mixins() { return CType[,] } override Str:CSlot slots() { throw UnsupportedErr.make } override Str toStr() { return qname } private ListType listOf } ************************************************************************** ** ParameterizedMethod ************************************************************************** ** ** ParameterizedMethod models a parameterized CMethod ** class ParameterizedMethod : CMethod { new make(GenericType parent, CMethod generic) { this.parent = parent this.generic = generic this.returnType = parent.parameterize(generic.returnType) generic.params.map(this.params = CParam[,]) |CParam p->Obj| { return ParameterizedMethodParam.make(parent, p) } signature = "$returnType $name(" + params.join(", ") + ")" } override Str name() { return generic.name } override Str qname() { return generic.qname } override Int flags() { return generic.flags } override Str toStr() { return signature } override Bool isParameterized() { return true } override CType inheritedReturnType() { return generic.inheritedReturnType } override readonly CType parent override readonly Str signature override readonly CMethod generic override readonly CType returnType override readonly CParam[] params } ************************************************************************** ** ParameterizedMethodParam ************************************************************************** class ParameterizedMethodParam : CParam { new make(GenericType parent, CParam generic) { this.generic = generic this.paramType = parent.parameterize(generic.paramType) } override Str name() { return generic.name } override Bool hasDefault() { return generic.hasDefault } override Str toStr() { return "$paramType $name" } override readonly CType paramType readonly CParam generic }