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https://github.com/golang/go
synced 2024-11-12 09:50:21 -07:00
reflection type structure. no parsing etc. yet.
main is a simple tester outside the Makefile. R=rsc DELTA=455 (455 added, 0 deleted, 0 changed) OCL=17235 CL=17242
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parent
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693a31b88e
47
usr/r/reflect/Makefile
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47
usr/r/reflect/Makefile
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# Copyright 2009 The Go Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style
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# license that can be found in the LICENSE file.
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# DO NOT EDIT. Automatically generated by gobuild.
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# gobuild -m reflect print.go type.go
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O=6
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GC=$(O)g
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CC=$(O)c -w
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AS=$(O)a
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AR=$(O)ar
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PKG=$(GOROOT)/pkg/reflect.a
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install: $(PKG)
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nuke: clean
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rm -f $(PKG)
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clean:
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rm -f *.$O *.a
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%.$O: %.go
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$(GC) $*.go
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%.$O: %.c
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$(CC) $*.c
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%.$O: %.s
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$(AS) $*.s
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O1=\
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type.$O\
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O2=\
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print.$O\
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$(PKG): a1 a2
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a1: $(O1)
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$(AR) grc $(PKG) $(O1)
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a2: $(O2)
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$(AR) grc $(PKG) $(O2)
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$(O1): nuke
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$(O2): a1
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31
usr/r/reflect/main.go
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31
usr/r/reflect/main.go
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import (
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"reflect"
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)
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func main() {
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reflect.Print(reflect.Int8); print("\n");
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reflect.Print(reflect.Int16); print("\n");
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reflect.Print(reflect.Int32); print("\n");
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reflect.Print(reflect.Int64); print("\n");
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reflect.Print(reflect.Uint8); print("\n");
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reflect.Print(reflect.Uint16); print("\n");
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reflect.Print(reflect.Uint32); print("\n");
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reflect.Print(reflect.Uint64); print("\n");
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reflect.Print(reflect.Float32); print("\n");
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reflect.Print(reflect.Float64); print("\n");
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reflect.Print(reflect.Float80); print("\n");
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reflect.Print(reflect.String); print("\n");
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reflect.Print(reflect.PtrInt8); print("\n");
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reflect.Print(reflect.ArrayFloat32); print("\n");
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reflect.Print(reflect.MapStringInt16); print("\n");
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reflect.Print(reflect.ChanArray); print("\n");
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reflect.Print(reflect.Structure); print("\n");
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reflect.Print(reflect.Function); print("\n");
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}
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101
usr/r/reflect/print.go
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101
usr/r/reflect/print.go
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package reflect
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import (
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"reflect"
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)
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// Implemented as a function rather than a method to keep the
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// Type interface small. TODO: should this return a string?
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export func Print(typ Type) {
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switch(typ.Kind()) {
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case Int8Kind:
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print("int8");
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case Int16Kind:
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print("int16");
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case Int32Kind:
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print("int32");
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case Int64Kind:
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print("int64");
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case Uint8Kind:
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print("uint8");
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case Uint16Kind:
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print("uint16");
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case Uint32Kind:
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print("uint32");
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case Uint64Kind:
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print("uint64");
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case Float32Kind:
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print("float32");
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case Float64Kind:
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print("float64");
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case Float80Kind:
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print("float80");
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case StringKind:
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print("string");
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case PtrKind:
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p := typ.(PtrType);
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print("*");
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Print(p.Sub());
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case ArrayKind:
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a := typ.(ArrayType);
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if a.Len() >= 0 {
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print("[", a.Len(), "]")
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} else {
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print("[]")
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}
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Print(a.Elem());
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case MapKind:
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m := typ.(MapType);
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print("map[");
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Print(m.Key());
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print("]");
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Print(m.Elem());
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case ChanKind:
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c := typ.(ChanType);
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switch c.Dir() {
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case RecvDir:
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print("<-chan");
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case SendDir:
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print("chan<-");
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case BothDir:
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print("chan");
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default:
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panicln("reflect.Print: unknown chan direction");
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}
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Print(c.Elem());
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case StructKind:
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s := typ.(StructType);
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print("struct{");
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for i := 0; i < s.Len(); i++ {
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n, t := s.Field(i);
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print(n, " ");
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Print(t);
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if i < s.Len() - 1 {
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print("; ");
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}
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}
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print("}");
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case FuncKind:
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f := typ.(FuncType);
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print("func ");
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if f.Receiver() != nil {
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print("(");
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Print(f.Receiver());
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print(")");
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}
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print("(");
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Print(f.In());
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print(")");
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if f.Out() != nil {
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print("(");
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Print(f.Out());
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print(")");
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}
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default:
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panicln("can't print type ", typ.Kind());
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}
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}
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292
usr/r/reflect/type.go
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292
usr/r/reflect/type.go
Normal file
@ -0,0 +1,292 @@
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package reflect
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export type Type interface
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export type Value interface{} // TODO: define this
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export func LookupTypeName(name string) Type
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//export var GlobalTypeStrings = sys.typestrings;
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// Cache of types keyed by type name
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var types = new(map[string] *Type) // BUG TODO: should be Type not *Type
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// Cache of type strings keyed by type name
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var strings = new(map[string] string)
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export const (
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ArrayKind = iota;
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ChanKind;
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Float32Kind;
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Float64Kind;
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Float80Kind;
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FuncKind;
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Int16Kind;
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Int32Kind;
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Int64Kind;
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Int8Kind;
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MapKind;
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PtrKind;
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StringKind;
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StructKind;
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Uint16Kind;
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Uint32Kind;
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Uint64Kind;
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Uint8Kind;
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)
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type Type interface {
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Kind() int;
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}
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type BasicType struct{
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kind int
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}
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func (t *BasicType) Kind() int {
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return t.kind
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}
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func NewBasicType(k int) Type {
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t := new(BasicType);
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t.kind = k;
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return t;
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}
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// Basic types
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export var (
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Int8 = NewBasicType(Int8Kind);
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Int16 = NewBasicType(Int16Kind);
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Int32 = NewBasicType(Int32Kind);
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Int64 = NewBasicType(Int64Kind);
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Uint8 = NewBasicType(Uint8Kind);
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Uint16 = NewBasicType(Uint16Kind);
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Uint32 = NewBasicType(Uint32Kind);
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Uint64 = NewBasicType(Uint64Kind);
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Float32 = NewBasicType(Float32Kind);
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Float64 = NewBasicType(Float64Kind);
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Float80 = NewBasicType(Float80Kind);
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String = NewBasicType(StringKind);
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)
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type StubType struct {
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name string;
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typ Type;
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}
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func (t *StubType) Get() Type {
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if t.typ == nil {
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t.typ = LookupTypeName(t.name)
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}
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return t.typ
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}
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export type PtrType interface {
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Sub() Type
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}
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type PtrTypeStruct struct {
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sub *StubType
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}
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func (t *PtrTypeStruct) Kind() int {
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return PtrKind
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}
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func (t *PtrTypeStruct) Sub() Type {
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return t.sub.Get()
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}
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func NewPtrTypeStruct(sub *StubType) *PtrTypeStruct {
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t := new(PtrTypeStruct);
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t.sub = sub;
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return t;
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}
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export type ArrayType interface {
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Len() int;
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Elem() Type;
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}
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type ArrayTypeStruct struct {
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elem *StubType;
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len int;
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}
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func (t *ArrayTypeStruct) Kind() int {
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return ArrayKind
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}
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func (t *ArrayTypeStruct) Len() int {
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// -1 is open array? TODO
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return t.len
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}
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func (t *ArrayTypeStruct) Elem() Type {
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return t.elem.Get()
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}
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func NewArrayTypeStruct(len int, elem *StubType) *ArrayTypeStruct {
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t := new(ArrayTypeStruct);
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t.len = len;
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t.elem = elem;
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return t;
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}
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export type MapType interface {
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Key() Type;
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Elem() Type;
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}
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type MapTypeStruct struct {
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key *StubType;
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elem *StubType;
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}
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func (t *MapTypeStruct) Kind() int {
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return MapKind
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}
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func (t *MapTypeStruct) Key() Type {
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return t.key.Get()
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}
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func (t *MapTypeStruct) Elem() Type {
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return t.elem.Get()
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}
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func NewMapTypeStruct(key, elem *StubType) *MapTypeStruct {
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t := new(MapTypeStruct);
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t.key = key;
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t.elem = elem;
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return t;
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}
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export type ChanType interface {
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Dir() int;
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Elem() Type;
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}
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export const ( // channel direction
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SendDir = 1 << iota;
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RecvDir;
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BothDir = SendDir | RecvDir;
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)
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type ChanTypeStruct struct {
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elem *StubType;
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dir int;
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}
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func (t *ChanTypeStruct) Kind() int {
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return ChanKind
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}
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func (t *ChanTypeStruct) Dir() int {
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// -1 is open array? TODO
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return t.dir
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}
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func (t *ChanTypeStruct) Elem() Type {
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return t.elem.Get()
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}
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func NewChanTypeStruct(dir int, elem *StubType) *ChanTypeStruct {
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t := new(ChanTypeStruct);
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t.dir = dir;
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t.elem = elem;
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return t;
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}
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export type StructType interface {
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Field(int) (name string, typ Type);
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Len() int;
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}
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type Field struct {
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name string;
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typ *StubType;
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}
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type StructTypeStruct struct {
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field *[]Field;
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}
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func (t *StructTypeStruct) Kind() int {
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return StructKind
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}
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func (t *StructTypeStruct) Field(i int) (name string, typ Type) {
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return t.field[i].name, t.field[i].typ.Get()
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}
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func (t *StructTypeStruct) Len() int {
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return len(t.field)
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}
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func Struct(field *[]Field) *StructTypeStruct {
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t := new(StructTypeStruct);
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t.field = field;
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return t;
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}
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func NewStructTypeStruct(field *[]Field) *StructTypeStruct {
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t := new(StructTypeStruct);
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t.field = field;
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return t;
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}
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export type FuncType interface {
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Receiver() StructType;
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In() StructType;
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Out() StructType;
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}
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type FuncTypeStruct struct {
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receiver *StructTypeStruct;
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in *StructTypeStruct;
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out *StructTypeStruct;
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}
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func (t *FuncTypeStruct) Kind() int {
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return FuncKind
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}
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func (t *FuncTypeStruct) Receiver() StructType {
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return t.receiver
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}
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func (t *FuncTypeStruct) In() StructType {
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return t.in
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}
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func (t *FuncTypeStruct) Out() StructType {
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return t.out
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}
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func NewFuncTypeStruct(receiver, in, out *StructTypeStruct) *FuncTypeStruct {
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t := new(FuncTypeStruct);
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t.receiver = receiver;
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t.in = in;
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t.out = out;
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return t;
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}
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//helpers for early bootstrap and debugging
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export func LookupTypeName(name string) Type { return Int8 }
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func Stub(n string, t Type) *StubType {
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s := new(StubType);
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s.name = n;
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s.typ = t;
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return s;
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}
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export var PtrInt8 Type = NewPtrTypeStruct(Stub("i", Int8));
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export var ArrayFloat32 Type = NewArrayTypeStruct(100, Stub("f", Float32));
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export var MapStringInt16 Type = NewMapTypeStruct(Stub("s", String), Stub("i", Int16));
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export var ChanArray Type = NewChanTypeStruct(RecvDir, Stub("a", ArrayFloat32));
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var F1 = Field{"i", Stub("i", Int64)};
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var Fields = []Field{F1};
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export var Structure = NewStructTypeStruct(&Fields);
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export var Function Type = NewFuncTypeStruct(Structure, Structure, Structure);
|
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