1 files changed, 87 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/noder/codes.go b/src/cmd/compile/internal/noder/codes.go
new file mode 100644
index 0000000..c1ee8d1
--- /dev/null
+++ b/src/cmd/compile/internal/noder/codes.go
@@ -0,0 +1,87 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package noder
+
+import "internal/pkgbits"
+
+// A codeStmt distinguishes among statement encodings.
+type codeStmt int
+
+func (c codeStmt) Marker() pkgbits.SyncMarker { return pkgbits.SyncStmt1 }
+func (c codeStmt) Value() int                 { return int(c) }
+
+const (
+	stmtEnd codeStmt = iota
+	stmtLabel
+	stmtBlock
+	stmtExpr
+	stmtSend
+	stmtAssign
+	stmtAssignOp
+	stmtIncDec
+	stmtBranch
+	stmtCall
+	stmtReturn
+	stmtIf
+	stmtFor
+	stmtSwitch
+	stmtSelect
+)
+
+// A codeExpr distinguishes among expression encodings.
+type codeExpr int
+
+func (c codeExpr) Marker() pkgbits.SyncMarker { return pkgbits.SyncExpr }
+func (c codeExpr) Value() int                 { return int(c) }
+
+// TODO(mdempsky): Split expr into addr, for lvalues.
+const (
+	exprConst  codeExpr = iota
+	exprLocal           // local variable
+	exprGlobal          // global variable or function
+	exprCompLit
+	exprFuncLit
+	exprFieldVal
+	exprMethodVal
+	exprMethodExpr
+	exprIndex
+	exprSlice
+	exprAssert
+	exprUnaryOp
+	exprBinaryOp
+	exprCall
+	exprConvert
+	exprNew
+	exprMake
+	exprNil
+	exprFuncInst
+	exprRecv
+	exprReshape
+)
+
+type codeAssign int
+
+func (c codeAssign) Marker() pkgbits.SyncMarker { return pkgbits.SyncAssign }
+func (c codeAssign) Value() int                 { return int(c) }
+
+const (
+	assignBlank codeAssign = iota
+	assignDef
+	assignExpr
+)
+
+// A codeDecl distinguishes among declaration encodings.
+type codeDecl int
+
+func (c codeDecl) Marker() pkgbits.SyncMarker { return pkgbits.SyncDecl }
+func (c codeDecl) Value() int                 { return int(c) }
+
+const (
+	declEnd codeDecl = iota
+	declFunc
+	declMethod
+	declVar
+	declOther
+)