| // Copyright 2011 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 gc |
| |
| import ( |
| "bytes" |
| "cmd/compile/internal/types" |
| "cmd/internal/src" |
| "fmt" |
| "io" |
| "strconv" |
| "strings" |
| "sync" |
| "unicode/utf8" |
| ) |
| |
| // A FmtFlag value is a set of flags (or 0). |
| // They control how the Xconv functions format their values. |
| // See the respective function's documentation for details. |
| type FmtFlag int |
| |
| const ( // fmt.Format flag/prec or verb |
| FmtLeft FmtFlag = 1 << iota // '-' |
| FmtSharp // '#' |
| FmtSign // '+' |
| FmtUnsigned // internal use only (historic: u flag) |
| FmtShort // verb == 'S' (historic: h flag) |
| FmtLong // verb == 'L' (historic: l flag) |
| FmtComma // '.' (== hasPrec) (historic: , flag) |
| FmtByte // '0' (historic: hh flag) |
| ) |
| |
| // fmtFlag computes the (internal) FmtFlag |
| // value given the fmt.State and format verb. |
| func fmtFlag(s fmt.State, verb rune) FmtFlag { |
| var flag FmtFlag |
| if s.Flag('-') { |
| flag |= FmtLeft |
| } |
| if s.Flag('#') { |
| flag |= FmtSharp |
| } |
| if s.Flag('+') { |
| flag |= FmtSign |
| } |
| if s.Flag(' ') { |
| Fatalf("FmtUnsigned in format string") |
| } |
| if _, ok := s.Precision(); ok { |
| flag |= FmtComma |
| } |
| if s.Flag('0') { |
| flag |= FmtByte |
| } |
| switch verb { |
| case 'S': |
| flag |= FmtShort |
| case 'L': |
| flag |= FmtLong |
| } |
| return flag |
| } |
| |
| // Format conversions: |
| // TODO(gri) verify these; eliminate those not used anymore |
| // |
| // %v Op Node opcodes |
| // Flags: #: print Go syntax (automatic unless mode == FDbg) |
| // |
| // %j *Node Node details |
| // Flags: 0: suppresses things not relevant until walk |
| // |
| // %v *Val Constant values |
| // |
| // %v *types.Sym Symbols |
| // %S unqualified identifier in any mode |
| // Flags: +,- #: mode (see below) |
| // 0: in export mode: unqualified identifier if exported, qualified if not |
| // |
| // %v *types.Type Types |
| // %S omit "func" and receiver in function types |
| // %L definition instead of name. |
| // Flags: +,- #: mode (see below) |
| // ' ' (only in -/Sym mode) print type identifiers wit package name instead of prefix. |
| // |
| // %v *Node Nodes |
| // %S (only in +/debug mode) suppress recursion |
| // %L (only in Error mode) print "foo (type Bar)" |
| // Flags: +,- #: mode (see below) |
| // |
| // %v Nodes Node lists |
| // Flags: those of *Node |
| // .: separate items with ',' instead of ';' |
| |
| // *types.Sym, *types.Type, and *Node types use the flags below to set the format mode |
| const ( |
| FErr fmtMode = iota |
| FDbg |
| FTypeId |
| FTypeIdName // same as FTypeId, but use package name instead of prefix |
| ) |
| |
| // The mode flags '+', '-', and '#' are sticky; they persist through |
| // recursions of *Node, *types.Type, and *types.Sym values. The ' ' flag is |
| // sticky only on *types.Type recursions and only used in %-/*types.Sym mode. |
| // |
| // Example: given a *types.Sym: %+v %#v %-v print an identifier properly qualified for debug/export/internal mode |
| |
| // Useful format combinations: |
| // TODO(gri): verify these |
| // |
| // *Node, Nodes: |
| // %+v multiline recursive debug dump of *Node/Nodes |
| // %+S non-recursive debug dump |
| // |
| // *Node: |
| // %#v Go format |
| // %L "foo (type Bar)" for error messages |
| // |
| // *types.Type: |
| // %#v Go format |
| // %#L type definition instead of name |
| // %#S omit "func" and receiver in function signature |
| // |
| // %-v type identifiers |
| // %-S type identifiers without "func" and arg names in type signatures (methodsym) |
| // %- v type identifiers with package name instead of prefix (typesym, dcommontype, typehash) |
| |
| // update returns the results of applying f to mode. |
| func (f FmtFlag) update(mode fmtMode) (FmtFlag, fmtMode) { |
| switch { |
| case f&FmtSign != 0: |
| mode = FDbg |
| case f&FmtSharp != 0: |
| // ignore (textual export format no longer supported) |
| case f&FmtUnsigned != 0: |
| mode = FTypeIdName |
| case f&FmtLeft != 0: |
| mode = FTypeId |
| } |
| |
| f &^= FmtSharp | FmtLeft | FmtSign |
| return f, mode |
| } |
| |
| var goopnames = []string{ |
| OADDR: "&", |
| OADD: "+", |
| OADDSTR: "+", |
| OALIGNOF: "unsafe.Alignof", |
| OANDAND: "&&", |
| OANDNOT: "&^", |
| OAND: "&", |
| OAPPEND: "append", |
| OAS: "=", |
| OAS2: "=", |
| OBREAK: "break", |
| OCALL: "function call", // not actual syntax |
| OCAP: "cap", |
| OCASE: "case", |
| OCLOSE: "close", |
| OCOMPLEX: "complex", |
| OBITNOT: "^", |
| OCONTINUE: "continue", |
| OCOPY: "copy", |
| ODELETE: "delete", |
| ODEFER: "defer", |
| ODIV: "/", |
| OEQ: "==", |
| OFALL: "fallthrough", |
| OFOR: "for", |
| OFORUNTIL: "foruntil", // not actual syntax; used to avoid off-end pointer live on backedge.892 |
| OGE: ">=", |
| OGOTO: "goto", |
| OGT: ">", |
| OIF: "if", |
| OIMAG: "imag", |
| OINLMARK: "inlmark", |
| ODEREF: "*", |
| OLEN: "len", |
| OLE: "<=", |
| OLSH: "<<", |
| OLT: "<", |
| OMAKE: "make", |
| ONEG: "-", |
| OMOD: "%", |
| OMUL: "*", |
| ONEW: "new", |
| ONE: "!=", |
| ONOT: "!", |
| OOFFSETOF: "unsafe.Offsetof", |
| OOROR: "||", |
| OOR: "|", |
| OPANIC: "panic", |
| OPLUS: "+", |
| OPRINTN: "println", |
| OPRINT: "print", |
| ORANGE: "range", |
| OREAL: "real", |
| ORECV: "<-", |
| ORECOVER: "recover", |
| ORETURN: "return", |
| ORSH: ">>", |
| OSELECT: "select", |
| OSEND: "<-", |
| OSIZEOF: "unsafe.Sizeof", |
| OSUB: "-", |
| OSWITCH: "switch", |
| OXOR: "^", |
| } |
| |
| func (o Op) GoString() string { |
| return fmt.Sprintf("%#v", o) |
| } |
| |
| func (o Op) format(s fmt.State, verb rune, mode fmtMode) { |
| switch verb { |
| case 'v': |
| o.oconv(s, fmtFlag(s, verb), mode) |
| |
| default: |
| fmt.Fprintf(s, "%%!%c(Op=%d)", verb, int(o)) |
| } |
| } |
| |
| func (o Op) oconv(s fmt.State, flag FmtFlag, mode fmtMode) { |
| if flag&FmtSharp != 0 || mode != FDbg { |
| if int(o) < len(goopnames) && goopnames[o] != "" { |
| fmt.Fprint(s, goopnames[o]) |
| return |
| } |
| } |
| |
| // 'o.String()' instead of just 'o' to avoid infinite recursion |
| fmt.Fprint(s, o.String()) |
| } |
| |
| type ( |
| fmtMode int |
| |
| fmtNodeErr Node |
| fmtNodeDbg Node |
| fmtNodeTypeId Node |
| fmtNodeTypeIdName Node |
| |
| fmtOpErr Op |
| fmtOpDbg Op |
| fmtOpTypeId Op |
| fmtOpTypeIdName Op |
| |
| fmtTypeErr types.Type |
| fmtTypeDbg types.Type |
| fmtTypeTypeId types.Type |
| fmtTypeTypeIdName types.Type |
| |
| fmtSymErr types.Sym |
| fmtSymDbg types.Sym |
| fmtSymTypeId types.Sym |
| fmtSymTypeIdName types.Sym |
| |
| fmtNodesErr Nodes |
| fmtNodesDbg Nodes |
| fmtNodesTypeId Nodes |
| fmtNodesTypeIdName Nodes |
| ) |
| |
| func (n *fmtNodeErr) Format(s fmt.State, verb rune) { (*Node)(n).format(s, verb, FErr) } |
| func (n *fmtNodeDbg) Format(s fmt.State, verb rune) { (*Node)(n).format(s, verb, FDbg) } |
| func (n *fmtNodeTypeId) Format(s fmt.State, verb rune) { (*Node)(n).format(s, verb, FTypeId) } |
| func (n *fmtNodeTypeIdName) Format(s fmt.State, verb rune) { (*Node)(n).format(s, verb, FTypeIdName) } |
| func (n *Node) Format(s fmt.State, verb rune) { n.format(s, verb, FErr) } |
| |
| func (o fmtOpErr) Format(s fmt.State, verb rune) { Op(o).format(s, verb, FErr) } |
| func (o fmtOpDbg) Format(s fmt.State, verb rune) { Op(o).format(s, verb, FDbg) } |
| func (o fmtOpTypeId) Format(s fmt.State, verb rune) { Op(o).format(s, verb, FTypeId) } |
| func (o fmtOpTypeIdName) Format(s fmt.State, verb rune) { Op(o).format(s, verb, FTypeIdName) } |
| func (o Op) Format(s fmt.State, verb rune) { o.format(s, verb, FErr) } |
| |
| func (t *fmtTypeErr) Format(s fmt.State, verb rune) { typeFormat((*types.Type)(t), s, verb, FErr) } |
| func (t *fmtTypeDbg) Format(s fmt.State, verb rune) { typeFormat((*types.Type)(t), s, verb, FDbg) } |
| func (t *fmtTypeTypeId) Format(s fmt.State, verb rune) { |
| typeFormat((*types.Type)(t), s, verb, FTypeId) |
| } |
| func (t *fmtTypeTypeIdName) Format(s fmt.State, verb rune) { |
| typeFormat((*types.Type)(t), s, verb, FTypeIdName) |
| } |
| |
| // func (t *types.Type) Format(s fmt.State, verb rune) // in package types |
| |
| func (y *fmtSymErr) Format(s fmt.State, verb rune) { symFormat((*types.Sym)(y), s, verb, FErr) } |
| func (y *fmtSymDbg) Format(s fmt.State, verb rune) { symFormat((*types.Sym)(y), s, verb, FDbg) } |
| func (y *fmtSymTypeId) Format(s fmt.State, verb rune) { symFormat((*types.Sym)(y), s, verb, FTypeId) } |
| func (y *fmtSymTypeIdName) Format(s fmt.State, verb rune) { |
| symFormat((*types.Sym)(y), s, verb, FTypeIdName) |
| } |
| |
| // func (y *types.Sym) Format(s fmt.State, verb rune) // in package types { y.format(s, verb, FErr) } |
| |
| func (n fmtNodesErr) Format(s fmt.State, verb rune) { (Nodes)(n).format(s, verb, FErr) } |
| func (n fmtNodesDbg) Format(s fmt.State, verb rune) { (Nodes)(n).format(s, verb, FDbg) } |
| func (n fmtNodesTypeId) Format(s fmt.State, verb rune) { (Nodes)(n).format(s, verb, FTypeId) } |
| func (n fmtNodesTypeIdName) Format(s fmt.State, verb rune) { (Nodes)(n).format(s, verb, FTypeIdName) } |
| func (n Nodes) Format(s fmt.State, verb rune) { n.format(s, verb, FErr) } |
| |
| func (m fmtMode) Fprintf(s fmt.State, format string, args ...interface{}) { |
| m.prepareArgs(args) |
| fmt.Fprintf(s, format, args...) |
| } |
| |
| func (m fmtMode) Sprintf(format string, args ...interface{}) string { |
| m.prepareArgs(args) |
| return fmt.Sprintf(format, args...) |
| } |
| |
| func (m fmtMode) Sprint(args ...interface{}) string { |
| m.prepareArgs(args) |
| return fmt.Sprint(args...) |
| } |
| |
| func (m fmtMode) prepareArgs(args []interface{}) { |
| switch m { |
| case FErr: |
| for i, arg := range args { |
| switch arg := arg.(type) { |
| case Op: |
| args[i] = fmtOpErr(arg) |
| case *Node: |
| args[i] = (*fmtNodeErr)(arg) |
| case *types.Type: |
| args[i] = (*fmtTypeErr)(arg) |
| case *types.Sym: |
| args[i] = (*fmtSymErr)(arg) |
| case Nodes: |
| args[i] = fmtNodesErr(arg) |
| case Val, int32, int64, string, types.EType: |
| // OK: printing these types doesn't depend on mode |
| default: |
| Fatalf("mode.prepareArgs type %T", arg) |
| } |
| } |
| case FDbg: |
| for i, arg := range args { |
| switch arg := arg.(type) { |
| case Op: |
| args[i] = fmtOpDbg(arg) |
| case *Node: |
| args[i] = (*fmtNodeDbg)(arg) |
| case *types.Type: |
| args[i] = (*fmtTypeDbg)(arg) |
| case *types.Sym: |
| args[i] = (*fmtSymDbg)(arg) |
| case Nodes: |
| args[i] = fmtNodesDbg(arg) |
| case Val, int32, int64, string, types.EType: |
| // OK: printing these types doesn't depend on mode |
| default: |
| Fatalf("mode.prepareArgs type %T", arg) |
| } |
| } |
| case FTypeId: |
| for i, arg := range args { |
| switch arg := arg.(type) { |
| case Op: |
| args[i] = fmtOpTypeId(arg) |
| case *Node: |
| args[i] = (*fmtNodeTypeId)(arg) |
| case *types.Type: |
| args[i] = (*fmtTypeTypeId)(arg) |
| case *types.Sym: |
| args[i] = (*fmtSymTypeId)(arg) |
| case Nodes: |
| args[i] = fmtNodesTypeId(arg) |
| case Val, int32, int64, string, types.EType: |
| // OK: printing these types doesn't depend on mode |
| default: |
| Fatalf("mode.prepareArgs type %T", arg) |
| } |
| } |
| case FTypeIdName: |
| for i, arg := range args { |
| switch arg := arg.(type) { |
| case Op: |
| args[i] = fmtOpTypeIdName(arg) |
| case *Node: |
| args[i] = (*fmtNodeTypeIdName)(arg) |
| case *types.Type: |
| args[i] = (*fmtTypeTypeIdName)(arg) |
| case *types.Sym: |
| args[i] = (*fmtSymTypeIdName)(arg) |
| case Nodes: |
| args[i] = fmtNodesTypeIdName(arg) |
| case Val, int32, int64, string, types.EType: |
| // OK: printing these types doesn't depend on mode |
| default: |
| Fatalf("mode.prepareArgs type %T", arg) |
| } |
| } |
| default: |
| Fatalf("mode.prepareArgs mode %d", m) |
| } |
| } |
| |
| func (n *Node) format(s fmt.State, verb rune, mode fmtMode) { |
| switch verb { |
| case 'v', 'S', 'L': |
| n.nconv(s, fmtFlag(s, verb), mode) |
| |
| case 'j': |
| n.jconv(s, fmtFlag(s, verb)) |
| |
| default: |
| fmt.Fprintf(s, "%%!%c(*Node=%p)", verb, n) |
| } |
| } |
| |
| // *Node details |
| func (n *Node) jconv(s fmt.State, flag FmtFlag) { |
| c := flag & FmtShort |
| |
| // Useful to see which nodes in a Node Dump/dumplist are actually identical |
| if Debug_dumpptrs != 0 { |
| fmt.Fprintf(s, " p(%p)", n) |
| } |
| if c == 0 && n.Name != nil && n.Name.Vargen != 0 { |
| fmt.Fprintf(s, " g(%d)", n.Name.Vargen) |
| } |
| |
| if Debug_dumpptrs != 0 && c == 0 && n.Name != nil && n.Name.Defn != nil { |
| // Useful to see where Defn is set and what node it points to |
| fmt.Fprintf(s, " defn(%p)", n.Name.Defn) |
| } |
| |
| if n.Pos.IsKnown() { |
| pfx := "" |
| switch n.Pos.IsStmt() { |
| case src.PosNotStmt: |
| pfx = "_" // "-" would be confusing |
| case src.PosIsStmt: |
| pfx = "+" |
| } |
| fmt.Fprintf(s, " l(%s%d)", pfx, n.Pos.Line()) |
| } |
| |
| if c == 0 && n.Xoffset != BADWIDTH { |
| fmt.Fprintf(s, " x(%d)", n.Xoffset) |
| } |
| |
| if n.Class() != 0 { |
| fmt.Fprintf(s, " class(%v)", n.Class()) |
| } |
| |
| if n.Colas() { |
| fmt.Fprintf(s, " colas(%v)", n.Colas()) |
| } |
| |
| switch n.Esc { |
| case EscUnknown: |
| break |
| |
| case EscHeap: |
| fmt.Fprint(s, " esc(h)") |
| |
| case EscNone: |
| fmt.Fprint(s, " esc(no)") |
| |
| case EscNever: |
| if c == 0 { |
| fmt.Fprint(s, " esc(N)") |
| } |
| |
| default: |
| fmt.Fprintf(s, " esc(%d)", n.Esc) |
| } |
| |
| if e, ok := n.Opt().(*EscLocation); ok && e.loopDepth != 0 { |
| fmt.Fprintf(s, " ld(%d)", e.loopDepth) |
| } |
| |
| if c == 0 && n.Typecheck() != 0 { |
| fmt.Fprintf(s, " tc(%d)", n.Typecheck()) |
| } |
| |
| if n.IsDDD() { |
| fmt.Fprintf(s, " isddd(%v)", n.IsDDD()) |
| } |
| |
| if n.Implicit() { |
| fmt.Fprintf(s, " implicit(%v)", n.Implicit()) |
| } |
| |
| if n.Embedded() { |
| fmt.Fprintf(s, " embedded") |
| } |
| |
| if n.Op == ONAME { |
| if n.Name.Addrtaken() { |
| fmt.Fprint(s, " addrtaken") |
| } |
| if n.Name.Assigned() { |
| fmt.Fprint(s, " assigned") |
| } |
| if n.Name.IsClosureVar() { |
| fmt.Fprint(s, " closurevar") |
| } |
| if n.Name.Captured() { |
| fmt.Fprint(s, " captured") |
| } |
| if n.Name.IsOutputParamHeapAddr() { |
| fmt.Fprint(s, " outputparamheapaddr") |
| } |
| } |
| if n.Bounded() { |
| fmt.Fprint(s, " bounded") |
| } |
| if n.NonNil() { |
| fmt.Fprint(s, " nonnil") |
| } |
| |
| if c == 0 && n.HasCall() { |
| fmt.Fprint(s, " hascall") |
| } |
| |
| if c == 0 && n.Name != nil && n.Name.Used() { |
| fmt.Fprint(s, " used") |
| } |
| } |
| |
| func (v Val) Format(s fmt.State, verb rune) { |
| switch verb { |
| case 'v': |
| v.vconv(s, fmtFlag(s, verb)) |
| |
| default: |
| fmt.Fprintf(s, "%%!%c(Val=%T)", verb, v) |
| } |
| } |
| |
| func (v Val) vconv(s fmt.State, flag FmtFlag) { |
| switch u := v.U.(type) { |
| case *Mpint: |
| if !u.Rune { |
| if flag&FmtSharp != 0 { |
| fmt.Fprint(s, u.String()) |
| return |
| } |
| fmt.Fprint(s, u.GoString()) |
| return |
| } |
| |
| switch x := u.Int64(); { |
| case ' ' <= x && x < utf8.RuneSelf && x != '\\' && x != '\'': |
| fmt.Fprintf(s, "'%c'", int(x)) |
| |
| case 0 <= x && x < 1<<16: |
| fmt.Fprintf(s, "'\\u%04x'", uint(int(x))) |
| |
| case 0 <= x && x <= utf8.MaxRune: |
| fmt.Fprintf(s, "'\\U%08x'", uint64(x)) |
| |
| default: |
| fmt.Fprintf(s, "('\\x00' + %v)", u) |
| } |
| |
| case *Mpflt: |
| if flag&FmtSharp != 0 { |
| fmt.Fprint(s, u.String()) |
| return |
| } |
| fmt.Fprint(s, u.GoString()) |
| return |
| |
| case *Mpcplx: |
| if flag&FmtSharp != 0 { |
| fmt.Fprint(s, u.String()) |
| return |
| } |
| fmt.Fprint(s, u.GoString()) |
| return |
| |
| case string: |
| fmt.Fprint(s, strconv.Quote(u)) |
| |
| case bool: |
| fmt.Fprint(s, u) |
| |
| case *NilVal: |
| fmt.Fprint(s, "nil") |
| |
| default: |
| fmt.Fprintf(s, "<ctype=%d>", v.Ctype()) |
| } |
| } |
| |
| /* |
| s%,%,\n%g |
| s%\n+%\n%g |
| s%^[ ]*T%%g |
| s%,.*%%g |
| s%.+% [T&] = "&",%g |
| s%^ ........*\]%&~%g |
| s%~ %%g |
| */ |
| |
| func symfmt(b *bytes.Buffer, s *types.Sym, flag FmtFlag, mode fmtMode) { |
| if flag&FmtShort == 0 { |
| switch mode { |
| case FErr: // This is for the user |
| if s.Pkg == builtinpkg || s.Pkg == localpkg { |
| b.WriteString(s.Name) |
| return |
| } |
| |
| // If the name was used by multiple packages, display the full path, |
| if s.Pkg.Name != "" && numImport[s.Pkg.Name] > 1 { |
| fmt.Fprintf(b, "%q.%s", s.Pkg.Path, s.Name) |
| return |
| } |
| b.WriteString(s.Pkg.Name) |
| b.WriteByte('.') |
| b.WriteString(s.Name) |
| return |
| |
| case FDbg: |
| b.WriteString(s.Pkg.Name) |
| b.WriteByte('.') |
| b.WriteString(s.Name) |
| return |
| |
| case FTypeIdName: |
| // dcommontype, typehash |
| b.WriteString(s.Pkg.Name) |
| b.WriteByte('.') |
| b.WriteString(s.Name) |
| return |
| |
| case FTypeId: |
| // (methodsym), typesym, weaksym |
| b.WriteString(s.Pkg.Prefix) |
| b.WriteByte('.') |
| b.WriteString(s.Name) |
| return |
| } |
| } |
| |
| if flag&FmtByte != 0 { |
| // FmtByte (hh) implies FmtShort (h) |
| // skip leading "type." in method name |
| name := s.Name |
| if i := strings.LastIndex(name, "."); i >= 0 { |
| name = name[i+1:] |
| } |
| |
| if mode == FDbg { |
| fmt.Fprintf(b, "@%q.%s", s.Pkg.Path, name) |
| return |
| } |
| |
| b.WriteString(name) |
| return |
| } |
| |
| b.WriteString(s.Name) |
| } |
| |
| var basicnames = []string{ |
| TINT: "int", |
| TUINT: "uint", |
| TINT8: "int8", |
| TUINT8: "uint8", |
| TINT16: "int16", |
| TUINT16: "uint16", |
| TINT32: "int32", |
| TUINT32: "uint32", |
| TINT64: "int64", |
| TUINT64: "uint64", |
| TUINTPTR: "uintptr", |
| TFLOAT32: "float32", |
| TFLOAT64: "float64", |
| TCOMPLEX64: "complex64", |
| TCOMPLEX128: "complex128", |
| TBOOL: "bool", |
| TANY: "any", |
| TSTRING: "string", |
| TNIL: "nil", |
| TIDEAL: "untyped number", |
| TBLANK: "blank", |
| } |
| |
| var fmtBufferPool = sync.Pool{ |
| New: func() interface{} { |
| return new(bytes.Buffer) |
| }, |
| } |
| |
| func tconv(t *types.Type, flag FmtFlag, mode fmtMode) string { |
| buf := fmtBufferPool.Get().(*bytes.Buffer) |
| buf.Reset() |
| defer fmtBufferPool.Put(buf) |
| |
| tconv2(buf, t, flag, mode, nil) |
| return types.InternString(buf.Bytes()) |
| } |
| |
| // tconv2 writes a string representation of t to b. |
| // flag and mode control exactly what is printed. |
| // Any types x that are already in the visited map get printed as @%d where %d=visited[x]. |
| // See #16897 before changing the implementation of tconv. |
| func tconv2(b *bytes.Buffer, t *types.Type, flag FmtFlag, mode fmtMode, visited map[*types.Type]int) { |
| if off, ok := visited[t]; ok { |
| // We've seen this type before, so we're trying to print it recursively. |
| // Print a reference to it instead. |
| fmt.Fprintf(b, "@%d", off) |
| return |
| } |
| if t == nil { |
| b.WriteString("<T>") |
| return |
| } |
| if t.Etype == types.TSSA { |
| b.WriteString(t.Extra.(string)) |
| return |
| } |
| if t.Etype == types.TTUPLE { |
| b.WriteString(t.FieldType(0).String()) |
| b.WriteByte(',') |
| b.WriteString(t.FieldType(1).String()) |
| return |
| } |
| |
| if t.Etype == types.TRESULTS { |
| tys := t.Extra.(*types.Results).Types |
| for i, et := range tys { |
| if i > 0 { |
| b.WriteByte(',') |
| } |
| b.WriteString(et.String()) |
| } |
| return |
| } |
| |
| flag, mode = flag.update(mode) |
| if mode == FTypeIdName { |
| flag |= FmtUnsigned |
| } |
| if t == types.Bytetype || t == types.Runetype { |
| // in %-T mode collapse rune and byte with their originals. |
| switch mode { |
| case FTypeIdName, FTypeId: |
| t = types.Types[t.Etype] |
| default: |
| sconv2(b, t.Sym, FmtShort, mode) |
| return |
| } |
| } |
| if t == types.Errortype { |
| b.WriteString("error") |
| return |
| } |
| |
| // Unless the 'L' flag was specified, if the type has a name, just print that name. |
| if flag&FmtLong == 0 && t.Sym != nil && t != types.Types[t.Etype] { |
| switch mode { |
| case FTypeId, FTypeIdName: |
| if flag&FmtShort != 0 { |
| if t.Vargen != 0 { |
| sconv2(b, t.Sym, FmtShort, mode) |
| fmt.Fprintf(b, "·%d", t.Vargen) |
| return |
| } |
| sconv2(b, t.Sym, FmtShort, mode) |
| return |
| } |
| |
| if mode == FTypeIdName { |
| sconv2(b, t.Sym, FmtUnsigned, mode) |
| return |
| } |
| |
| if t.Sym.Pkg == localpkg && t.Vargen != 0 { |
| b.WriteString(mode.Sprintf("%v·%d", t.Sym, t.Vargen)) |
| return |
| } |
| } |
| |
| sconv2(b, t.Sym, 0, mode) |
| return |
| } |
| |
| if int(t.Etype) < len(basicnames) && basicnames[t.Etype] != "" { |
| var name string |
| switch t { |
| case types.UntypedBool: |
| name = "untyped bool" |
| case types.UntypedString: |
| name = "untyped string" |
| case types.UntypedInt: |
| name = "untyped int" |
| case types.UntypedRune: |
| name = "untyped rune" |
| case types.UntypedFloat: |
| name = "untyped float" |
| case types.UntypedComplex: |
| name = "untyped complex" |
| default: |
| name = basicnames[t.Etype] |
| } |
| b.WriteString(name) |
| return |
| } |
| |
| if mode == FDbg { |
| b.WriteString(t.Etype.String()) |
| b.WriteByte('-') |
| tconv2(b, t, flag, FErr, visited) |
| return |
| } |
| |
| // At this point, we might call tconv2 recursively. Add the current type to the visited list so we don't |
| // try to print it recursively. |
| // We record the offset in the result buffer where the type's text starts. This offset serves as a reference |
| // point for any later references to the same type. |
| // Note that we remove the type from the visited map as soon as the recursive call is done. |
| // This prevents encoding types like map[*int]*int as map[*int]@4. (That encoding would work, |
| // but I'd like to use the @ notation only when strictly necessary.) |
| if visited == nil { |
| visited = map[*types.Type]int{} |
| } |
| visited[t] = b.Len() |
| defer delete(visited, t) |
| |
| switch t.Etype { |
| case TPTR: |
| b.WriteByte('*') |
| switch mode { |
| case FTypeId, FTypeIdName: |
| if flag&FmtShort != 0 { |
| tconv2(b, t.Elem(), FmtShort, mode, visited) |
| return |
| } |
| } |
| tconv2(b, t.Elem(), 0, mode, visited) |
| |
| case TARRAY: |
| b.WriteByte('[') |
| b.WriteString(strconv.FormatInt(t.NumElem(), 10)) |
| b.WriteByte(']') |
| tconv2(b, t.Elem(), 0, mode, visited) |
| |
| case TSLICE: |
| b.WriteString("[]") |
| tconv2(b, t.Elem(), 0, mode, visited) |
| |
| case TCHAN: |
| switch t.ChanDir() { |
| case types.Crecv: |
| b.WriteString("<-chan ") |
| tconv2(b, t.Elem(), 0, mode, visited) |
| case types.Csend: |
| b.WriteString("chan<- ") |
| tconv2(b, t.Elem(), 0, mode, visited) |
| default: |
| b.WriteString("chan ") |
| if t.Elem() != nil && t.Elem().IsChan() && t.Elem().Sym == nil && t.Elem().ChanDir() == types.Crecv { |
| b.WriteByte('(') |
| tconv2(b, t.Elem(), 0, mode, visited) |
| b.WriteByte(')') |
| } else { |
| tconv2(b, t.Elem(), 0, mode, visited) |
| } |
| } |
| |
| case TMAP: |
| b.WriteString("map[") |
| tconv2(b, t.Key(), 0, mode, visited) |
| b.WriteByte(']') |
| tconv2(b, t.Elem(), 0, mode, visited) |
| |
| case TINTER: |
| if t.IsEmptyInterface() { |
| b.WriteString("interface {}") |
| break |
| } |
| b.WriteString("interface {") |
| for i, f := range t.Fields().Slice() { |
| if i != 0 { |
| b.WriteByte(';') |
| } |
| b.WriteByte(' ') |
| switch { |
| case f.Sym == nil: |
| // Check first that a symbol is defined for this type. |
| // Wrong interface definitions may have types lacking a symbol. |
| break |
| case types.IsExported(f.Sym.Name): |
| sconv2(b, f.Sym, FmtShort, mode) |
| default: |
| flag1 := FmtLeft |
| if flag&FmtUnsigned != 0 { |
| flag1 = FmtUnsigned |
| } |
| sconv2(b, f.Sym, flag1, mode) |
| } |
| tconv2(b, f.Type, FmtShort, mode, visited) |
| } |
| if t.NumFields() != 0 { |
| b.WriteByte(' ') |
| } |
| b.WriteByte('}') |
| |
| case TFUNC: |
| if flag&FmtShort != 0 { |
| // no leading func |
| } else { |
| if t.Recv() != nil { |
| b.WriteString("method") |
| tconv2(b, t.Recvs(), 0, mode, visited) |
| b.WriteByte(' ') |
| } |
| b.WriteString("func") |
| } |
| tconv2(b, t.Params(), 0, mode, visited) |
| |
| switch t.NumResults() { |
| case 0: |
| // nothing to do |
| |
| case 1: |
| b.WriteByte(' ') |
| tconv2(b, t.Results().Field(0).Type, 0, mode, visited) // struct->field->field's type |
| |
| default: |
| b.WriteByte(' ') |
| tconv2(b, t.Results(), 0, mode, visited) |
| } |
| |
| case TSTRUCT: |
| if m := t.StructType().Map; m != nil { |
| mt := m.MapType() |
| // Format the bucket struct for map[x]y as map.bucket[x]y. |
| // This avoids a recursive print that generates very long names. |
| switch t { |
| case mt.Bucket: |
| b.WriteString("map.bucket[") |
| case mt.Hmap: |
| b.WriteString("map.hdr[") |
| case mt.Hiter: |
| b.WriteString("map.iter[") |
| default: |
| Fatalf("unknown internal map type") |
| } |
| tconv2(b, m.Key(), 0, mode, visited) |
| b.WriteByte(']') |
| tconv2(b, m.Elem(), 0, mode, visited) |
| break |
| } |
| |
| if funarg := t.StructType().Funarg; funarg != types.FunargNone { |
| b.WriteByte('(') |
| var flag1 FmtFlag |
| switch mode { |
| case FTypeId, FTypeIdName, FErr: |
| // no argument names on function signature, and no "noescape"/"nosplit" tags |
| flag1 = FmtShort |
| } |
| for i, f := range t.Fields().Slice() { |
| if i != 0 { |
| b.WriteString(", ") |
| } |
| fldconv(b, f, flag1, mode, visited, funarg) |
| } |
| b.WriteByte(')') |
| } else { |
| b.WriteString("struct {") |
| for i, f := range t.Fields().Slice() { |
| if i != 0 { |
| b.WriteByte(';') |
| } |
| b.WriteByte(' ') |
| fldconv(b, f, FmtLong, mode, visited, funarg) |
| } |
| if t.NumFields() != 0 { |
| b.WriteByte(' ') |
| } |
| b.WriteByte('}') |
| } |
| |
| case TFORW: |
| b.WriteString("undefined") |
| if t.Sym != nil { |
| b.WriteByte(' ') |
| sconv2(b, t.Sym, 0, mode) |
| } |
| |
| case TUNSAFEPTR: |
| b.WriteString("unsafe.Pointer") |
| |
| case Txxx: |
| b.WriteString("Txxx") |
| default: |
| // Don't know how to handle - fall back to detailed prints. |
| b.WriteString(mode.Sprintf("%v <%v>", t.Etype, t.Sym)) |
| } |
| } |
| |
| // Statements which may be rendered with a simplestmt as init. |
| func stmtwithinit(op Op) bool { |
| switch op { |
| case OIF, OFOR, OFORUNTIL, OSWITCH: |
| return true |
| } |
| |
| return false |
| } |
| |
| func (n *Node) stmtfmt(s fmt.State, mode fmtMode) { |
| // some statements allow for an init, but at most one, |
| // but we may have an arbitrary number added, eg by typecheck |
| // and inlining. If it doesn't fit the syntax, emit an enclosing |
| // block starting with the init statements. |
| |
| // if we can just say "for" n->ninit; ... then do so |
| simpleinit := n.Ninit.Len() == 1 && n.Ninit.First().Ninit.Len() == 0 && stmtwithinit(n.Op) |
| |
| // otherwise, print the inits as separate statements |
| complexinit := n.Ninit.Len() != 0 && !simpleinit && (mode != FErr) |
| |
| // but if it was for if/for/switch, put in an extra surrounding block to limit the scope |
| extrablock := complexinit && stmtwithinit(n.Op) |
| |
| if extrablock { |
| fmt.Fprint(s, "{") |
| } |
| |
| if complexinit { |
| mode.Fprintf(s, " %v; ", n.Ninit) |
| } |
| |
| switch n.Op { |
| case ODCL: |
| mode.Fprintf(s, "var %v %v", n.Left.Sym, n.Left.Type) |
| |
| case ODCLFIELD: |
| if n.Sym != nil { |
| mode.Fprintf(s, "%v %v", n.Sym, n.Left) |
| } else { |
| mode.Fprintf(s, "%v", n.Left) |
| } |
| |
| // Don't export "v = <N>" initializing statements, hope they're always |
| // preceded by the DCL which will be re-parsed and typechecked to reproduce |
| // the "v = <N>" again. |
| case OAS: |
| if n.Colas() && !complexinit { |
| mode.Fprintf(s, "%v := %v", n.Left, n.Right) |
| } else { |
| mode.Fprintf(s, "%v = %v", n.Left, n.Right) |
| } |
| |
| case OASOP: |
| if n.Implicit() { |
| if n.SubOp() == OADD { |
| mode.Fprintf(s, "%v++", n.Left) |
| } else { |
| mode.Fprintf(s, "%v--", n.Left) |
| } |
| break |
| } |
| |
| mode.Fprintf(s, "%v %#v= %v", n.Left, n.SubOp(), n.Right) |
| |
| case OAS2: |
| if n.Colas() && !complexinit { |
| mode.Fprintf(s, "%.v := %.v", n.List, n.Rlist) |
| break |
| } |
| fallthrough |
| |
| case OAS2DOTTYPE, OAS2FUNC, OAS2MAPR, OAS2RECV: |
| mode.Fprintf(s, "%.v = %v", n.List, n.Right) |
| |
| case ORETURN: |
| mode.Fprintf(s, "return %.v", n.List) |
| |
| case ORETJMP: |
| mode.Fprintf(s, "retjmp %v", n.Sym) |
| |
| case OINLMARK: |
| mode.Fprintf(s, "inlmark %d", n.Xoffset) |
| |
| case OGO: |
| mode.Fprintf(s, "go %v", n.Left) |
| |
| case ODEFER: |
| mode.Fprintf(s, "defer %v", n.Left) |
| |
| case OIF: |
| if simpleinit { |
| mode.Fprintf(s, "if %v; %v { %v }", n.Ninit.First(), n.Left, n.Nbody) |
| } else { |
| mode.Fprintf(s, "if %v { %v }", n.Left, n.Nbody) |
| } |
| if n.Rlist.Len() != 0 { |
| mode.Fprintf(s, " else { %v }", n.Rlist) |
| } |
| |
| case OFOR, OFORUNTIL: |
| opname := "for" |
| if n.Op == OFORUNTIL { |
| opname = "foruntil" |
| } |
| if mode == FErr { // TODO maybe only if FmtShort, same below |
| fmt.Fprintf(s, "%s loop", opname) |
| break |
| } |
| |
| fmt.Fprint(s, opname) |
| if simpleinit { |
| mode.Fprintf(s, " %v;", n.Ninit.First()) |
| } else if n.Right != nil { |
| fmt.Fprint(s, " ;") |
| } |
| |
| if n.Left != nil { |
| mode.Fprintf(s, " %v", n.Left) |
| } |
| |
| if n.Right != nil { |
| mode.Fprintf(s, "; %v", n.Right) |
| } else if simpleinit { |
| fmt.Fprint(s, ";") |
| } |
| |
| if n.Op == OFORUNTIL && n.List.Len() != 0 { |
| mode.Fprintf(s, "; %v", n.List) |
| } |
| |
| mode.Fprintf(s, " { %v }", n.Nbody) |
| |
| case ORANGE: |
| if mode == FErr { |
| fmt.Fprint(s, "for loop") |
| break |
| } |
| |
| if n.List.Len() == 0 { |
| mode.Fprintf(s, "for range %v { %v }", n.Right, n.Nbody) |
| break |
| } |
| |
| mode.Fprintf(s, "for %.v = range %v { %v }", n.List, n.Right, n.Nbody) |
| |
| case OSELECT, OSWITCH: |
| if mode == FErr { |
| mode.Fprintf(s, "%v statement", n.Op) |
| break |
| } |
| |
| mode.Fprintf(s, "%#v", n.Op) |
| if simpleinit { |
| mode.Fprintf(s, " %v;", n.Ninit.First()) |
| } |
| if n.Left != nil { |
| mode.Fprintf(s, " %v ", n.Left) |
| } |
| |
| mode.Fprintf(s, " { %v }", n.List) |
| |
| case OCASE: |
| if n.List.Len() != 0 { |
| mode.Fprintf(s, "case %.v", n.List) |
| } else { |
| fmt.Fprint(s, "default") |
| } |
| mode.Fprintf(s, ": %v", n.Nbody) |
| |
| case OBREAK, OCONTINUE, OGOTO, OFALL: |
| if n.Sym != nil { |
| mode.Fprintf(s, "%#v %v", n.Op, n.Sym) |
| } else { |
| mode.Fprintf(s, "%#v", n.Op) |
| } |
| |
| case OEMPTY: |
| break |
| |
| case OLABEL: |
| mode.Fprintf(s, "%v: ", n.Sym) |
| } |
| |
| if extrablock { |
| fmt.Fprint(s, "}") |
| } |
| } |
| |
| var opprec = []int{ |
| OALIGNOF: 8, |
| OAPPEND: 8, |
| OBYTES2STR: 8, |
| OARRAYLIT: 8, |
| OSLICELIT: 8, |
| ORUNES2STR: 8, |
| OCALLFUNC: 8, |
| OCALLINTER: 8, |
| OCALLMETH: 8, |
| OCALL: 8, |
| OCAP: 8, |
| OCLOSE: 8, |
| OCONVIFACE: 8, |
| OCONVNOP: 8, |
| OCONV: 8, |
| OCOPY: 8, |
| ODELETE: 8, |
| OGETG: 8, |
| OLEN: 8, |
| OLITERAL: 8, |
| OMAKESLICE: 8, |
| OMAKESLICECOPY: 8, |
| OMAKE: 8, |
| OMAPLIT: 8, |
| ONAME: 8, |
| ONEW: 8, |
| ONONAME: 8, |
| OOFFSETOF: 8, |
| OPACK: 8, |
| OPANIC: 8, |
| OPAREN: 8, |
| OPRINTN: 8, |
| OPRINT: 8, |
| ORUNESTR: 8, |
| OSIZEOF: 8, |
| OSTR2BYTES: 8, |
| OSTR2RUNES: 8, |
| OSTRUCTLIT: 8, |
| OTARRAY: 8, |
| OTCHAN: 8, |
| OTFUNC: 8, |
| OTINTER: 8, |
| OTMAP: 8, |
| OTSTRUCT: 8, |
| OINDEXMAP: 8, |
| OINDEX: 8, |
| OSLICE: 8, |
| OSLICESTR: 8, |
| OSLICEARR: 8, |
| OSLICE3: 8, |
| OSLICE3ARR: 8, |
| OSLICEHEADER: 8, |
| ODOTINTER: 8, |
| ODOTMETH: 8, |
| ODOTPTR: 8, |
| ODOTTYPE2: 8, |
| ODOTTYPE: 8, |
| ODOT: 8, |
| OXDOT: 8, |
| OCALLPART: 8, |
| OPLUS: 7, |
| ONOT: 7, |
| OBITNOT: 7, |
| ONEG: 7, |
| OADDR: 7, |
| ODEREF: 7, |
| ORECV: 7, |
| OMUL: 6, |
| ODIV: 6, |
| OMOD: 6, |
| OLSH: 6, |
| ORSH: 6, |
| OAND: 6, |
| OANDNOT: 6, |
| OADD: 5, |
| OSUB: 5, |
| OOR: 5, |
| OXOR: 5, |
| OEQ: 4, |
| OLT: 4, |
| OLE: 4, |
| OGE: 4, |
| OGT: 4, |
| ONE: 4, |
| OSEND: 3, |
| OANDAND: 2, |
| OOROR: 1, |
| |
| // Statements handled by stmtfmt |
| OAS: -1, |
| OAS2: -1, |
| OAS2DOTTYPE: -1, |
| OAS2FUNC: -1, |
| OAS2MAPR: -1, |
| OAS2RECV: -1, |
| OASOP: -1, |
| OBREAK: -1, |
| OCASE: -1, |
| OCONTINUE: -1, |
| ODCL: -1, |
| ODCLFIELD: -1, |
| ODEFER: -1, |
| OEMPTY: -1, |
| OFALL: -1, |
| OFOR: -1, |
| OFORUNTIL: -1, |
| OGOTO: -1, |
| OIF: -1, |
| OLABEL: -1, |
| OGO: -1, |
| ORANGE: -1, |
| ORETURN: -1, |
| OSELECT: -1, |
| OSWITCH: -1, |
| |
| OEND: 0, |
| } |
| |
| func (n *Node) exprfmt(s fmt.State, prec int, mode fmtMode) { |
| for n != nil && n.Implicit() && (n.Op == ODEREF || n.Op == OADDR) { |
| n = n.Left |
| } |
| |
| if n == nil { |
| fmt.Fprint(s, "<N>") |
| return |
| } |
| |
| nprec := opprec[n.Op] |
| if n.Op == OTYPE && n.Sym != nil { |
| nprec = 8 |
| } |
| |
| if prec > nprec { |
| mode.Fprintf(s, "(%v)", n) |
| return |
| } |
| |
| switch n.Op { |
| case OPAREN: |
| mode.Fprintf(s, "(%v)", n.Left) |
| |
| case OLITERAL: // this is a bit of a mess |
| if mode == FErr { |
| if n.Orig != nil && n.Orig != n { |
| n.Orig.exprfmt(s, prec, mode) |
| return |
| } |
| if n.Sym != nil { |
| fmt.Fprint(s, smodeString(n.Sym, mode)) |
| return |
| } |
| } |
| if n.Val().Ctype() == CTNIL && n.Orig != nil && n.Orig != n { |
| n.Orig.exprfmt(s, prec, mode) |
| return |
| } |
| if n.Type != nil && !n.Type.IsUntyped() { |
| // Need parens when type begins with what might |
| // be misinterpreted as a unary operator: * or <-. |
| if n.Type.IsPtr() || (n.Type.IsChan() && n.Type.ChanDir() == types.Crecv) { |
| mode.Fprintf(s, "(%v)(%v)", n.Type, n.Val()) |
| return |
| } else { |
| mode.Fprintf(s, "%v(%v)", n.Type, n.Val()) |
| return |
| } |
| } |
| |
| mode.Fprintf(s, "%v", n.Val()) |
| |
| // Special case: name used as local variable in export. |
| // _ becomes ~b%d internally; print as _ for export |
| case ONAME: |
| if mode == FErr && n.Sym != nil && n.Sym.Name[0] == '~' && n.Sym.Name[1] == 'b' { |
| fmt.Fprint(s, "_") |
| return |
| } |
| fallthrough |
| case OPACK, ONONAME: |
| fmt.Fprint(s, smodeString(n.Sym, mode)) |
| |
| case OTYPE: |
| if n.Type == nil && n.Sym != nil { |
| fmt.Fprint(s, smodeString(n.Sym, mode)) |
| return |
| } |
| mode.Fprintf(s, "%v", n.Type) |
| |
| case OTARRAY: |
| if n.Left != nil { |
| mode.Fprintf(s, "[%v]%v", n.Left, n.Right) |
| return |
| } |
| mode.Fprintf(s, "[]%v", n.Right) // happens before typecheck |
| |
| case OTMAP: |
| mode.Fprintf(s, "map[%v]%v", n.Left, n.Right) |
| |
| case OTCHAN: |
| switch n.TChanDir() { |
| case types.Crecv: |
| mode.Fprintf(s, "<-chan %v", n.Left) |
| |
| case types.Csend: |
| mode.Fprintf(s, "chan<- %v", n.Left) |
| |
| default: |
| if n.Left != nil && n.Left.Op == OTCHAN && n.Left.Sym == nil && n.Left.TChanDir() == types.Crecv { |
| mode.Fprintf(s, "chan (%v)", n.Left) |
| } else { |
| mode.Fprintf(s, "chan %v", n.Left) |
| } |
| } |
| |
| case OTSTRUCT: |
| fmt.Fprint(s, "<struct>") |
| |
| case OTINTER: |
| fmt.Fprint(s, "<inter>") |
| |
| case OTFUNC: |
| fmt.Fprint(s, "<func>") |
| |
| case OCLOSURE: |
| if mode == FErr { |
| fmt.Fprint(s, "func literal") |
| return |
| } |
| if n.Nbody.Len() != 0 { |
| mode.Fprintf(s, "%v { %v }", n.Type, n.Nbody) |
| return |
| } |
| mode.Fprintf(s, "%v { %v }", n.Type, n.Func.Closure.Nbody) |
| |
| case OCOMPLIT: |
| if mode == FErr { |
| if n.Implicit() { |
| mode.Fprintf(s, "... argument") |
| return |
| } |
| if n.Right != nil { |
| mode.Fprintf(s, "%v{%s}", n.Right, ellipsisIf(n.List.Len() != 0)) |
| return |
| } |
| |
| fmt.Fprint(s, "composite literal") |
| return |
| } |
| mode.Fprintf(s, "(%v{ %.v })", n.Right, n.List) |
| |
| case OPTRLIT: |
| mode.Fprintf(s, "&%v", n.Left) |
| |
| case OSTRUCTLIT, OARRAYLIT, OSLICELIT, OMAPLIT: |
| if mode == FErr { |
| mode.Fprintf(s, "%v{%s}", n.Type, ellipsisIf(n.List.Len() != 0)) |
| return |
| } |
| mode.Fprintf(s, "(%v{ %.v })", n.Type, n.List) |
| |
| case OKEY: |
| if n.Left != nil && n.Right != nil { |
| mode.Fprintf(s, "%v:%v", n.Left, n.Right) |
| return |
| } |
| |
| if n.Left == nil && n.Right != nil { |
| mode.Fprintf(s, ":%v", n.Right) |
| return |
| } |
| if n.Left != nil && n.Right == nil { |
| mode.Fprintf(s, "%v:", n.Left) |
| return |
| } |
| fmt.Fprint(s, ":") |
| |
| case OSTRUCTKEY: |
| mode.Fprintf(s, "%v:%v", n.Sym, n.Left) |
| |
| case OCALLPART: |
| n.Left.exprfmt(s, nprec, mode) |
| if n.Right == nil || n.Right.Sym == nil { |
| fmt.Fprint(s, ".<nil>") |
| return |
| } |
| mode.Fprintf(s, ".%0S", n.Right.Sym) |
| |
| case OXDOT, ODOT, ODOTPTR, ODOTINTER, ODOTMETH: |
| n.Left.exprfmt(s, nprec, mode) |
| if n.Sym == nil { |
| fmt.Fprint(s, ".<nil>") |
| return |
| } |
| mode.Fprintf(s, ".%0S", n.Sym) |
| |
| case ODOTTYPE, ODOTTYPE2: |
| n.Left.exprfmt(s, nprec, mode) |
| if n.Right != nil { |
| mode.Fprintf(s, ".(%v)", n.Right) |
| return |
| } |
| mode.Fprintf(s, ".(%v)", n.Type) |
| |
| case OINDEX, OINDEXMAP: |
| n.Left.exprfmt(s, nprec, mode) |
| mode.Fprintf(s, "[%v]", n.Right) |
| |
| case OSLICE, OSLICESTR, OSLICEARR, OSLICE3, OSLICE3ARR: |
| n.Left.exprfmt(s, nprec, mode) |
| fmt.Fprint(s, "[") |
| low, high, max := n.SliceBounds() |
| if low != nil { |
| fmt.Fprint(s, low.modeString(mode)) |
| } |
| fmt.Fprint(s, ":") |
| if high != nil { |
| fmt.Fprint(s, high.modeString(mode)) |
| } |
| if n.Op.IsSlice3() { |
| fmt.Fprint(s, ":") |
| if max != nil { |
| fmt.Fprint(s, max.modeString(mode)) |
| } |
| } |
| fmt.Fprint(s, "]") |
| |
| case OSLICEHEADER: |
| if n.List.Len() != 2 { |
| Fatalf("bad OSLICEHEADER list length %d", n.List.Len()) |
| } |
| mode.Fprintf(s, "sliceheader{%v,%v,%v}", n.Left, n.List.First(), n.List.Second()) |
| |
| case OCOMPLEX, OCOPY: |
| if n.Left != nil { |
| mode.Fprintf(s, "%#v(%v, %v)", n.Op, n.Left, n.Right) |
| } else { |
| mode.Fprintf(s, "%#v(%.v)", n.Op, n.List) |
| } |
| |
| case OCONV, |
| OCONVIFACE, |
| OCONVNOP, |
| OBYTES2STR, |
| ORUNES2STR, |
| OSTR2BYTES, |
| OSTR2RUNES, |
| ORUNESTR: |
| if n.Type == nil || n.Type.Sym == nil { |
| mode.Fprintf(s, "(%v)", n.Type) |
| } else { |
| mode.Fprintf(s, "%v", n.Type) |
| } |
| if n.Left != nil { |
| mode.Fprintf(s, "(%v)", n.Left) |
| } else { |
| mode.Fprintf(s, "(%.v)", n.List) |
| } |
| |
| case OREAL, |
| OIMAG, |
| OAPPEND, |
| OCAP, |
| OCLOSE, |
| ODELETE, |
| OLEN, |
| OMAKE, |
| ONEW, |
| OPANIC, |
| ORECOVER, |
| OALIGNOF, |
| OOFFSETOF, |
| OSIZEOF, |
| OPRINT, |
| OPRINTN: |
| if n.Left != nil { |
| mode.Fprintf(s, "%#v(%v)", n.Op, n.Left) |
| return |
| } |
| if n.IsDDD() { |
| mode.Fprintf(s, "%#v(%.v...)", n.Op, n.List) |
| return |
| } |
| mode.Fprintf(s, "%#v(%.v)", n.Op, n.List) |
| |
| case OCALL, OCALLFUNC, OCALLINTER, OCALLMETH, OGETG: |
| n.Left.exprfmt(s, nprec, mode) |
| if n.IsDDD() { |
| mode.Fprintf(s, "(%.v...)", n.List) |
| return |
| } |
| mode.Fprintf(s, "(%.v)", n.List) |
| |
| case OMAKEMAP, OMAKECHAN, OMAKESLICE: |
| if n.List.Len() != 0 { // pre-typecheck |
| mode.Fprintf(s, "make(%v, %.v)", n.Type, n.List) |
| return |
| } |
| if n.Right != nil { |
| mode.Fprintf(s, "make(%v, %v, %v)", n.Type, n.Left, n.Right) |
| return |
| } |
| if n.Left != nil && (n.Op == OMAKESLICE || !n.Left.Type.IsUntyped()) { |
| mode.Fprintf(s, "make(%v, %v)", n.Type, n.Left) |
| return |
| } |
| mode.Fprintf(s, "make(%v)", n.Type) |
| |
| case OMAKESLICECOPY: |
| mode.Fprintf(s, "makeslicecopy(%v, %v, %v)", n.Type, n.Left, n.Right) |
| |
| case OPLUS, ONEG, OADDR, OBITNOT, ODEREF, ONOT, ORECV: |
| // Unary |
| mode.Fprintf(s, "%#v", n.Op) |
| if n.Left != nil && n.Left.Op == n.Op { |
| fmt.Fprint(s, " ") |
| } |
| n.Left.exprfmt(s, nprec+1, mode) |
| |
| // Binary |
| case OADD, |
| OAND, |
| OANDAND, |
| OANDNOT, |
| ODIV, |
| OEQ, |
| OGE, |
| OGT, |
| OLE, |
| OLT, |
| OLSH, |
| OMOD, |
| OMUL, |
| ONE, |
| OOR, |
| OOROR, |
| ORSH, |
| OSEND, |
| OSUB, |
| OXOR: |
| n.Left.exprfmt(s, nprec, mode) |
| mode.Fprintf(s, " %#v ", n.Op) |
| n.Right.exprfmt(s, nprec+1, mode) |
| |
| case OADDSTR: |
| for i, n1 := range n.List.Slice() { |
| if i != 0 { |
| fmt.Fprint(s, " + ") |
| } |
| n1.exprfmt(s, nprec, mode) |
| } |
| case ODDD: |
| mode.Fprintf(s, "...") |
| default: |
| mode.Fprintf(s, "<node %v>", n.Op) |
| } |
| } |
| |
| func (n *Node) nodefmt(s fmt.State, flag FmtFlag, mode fmtMode) { |
| t := n.Type |
| |
| // We almost always want the original. |
| // TODO(gri) Why the special case for OLITERAL? |
| if n.Op != OLITERAL && n.Orig != nil { |
| n = n.Orig |
| } |
| |
| if flag&FmtLong != 0 && t != nil { |
| if t.Etype == TNIL { |
| fmt.Fprint(s, "nil") |
| } else if n.Op == ONAME && n.Name.AutoTemp() { |
| mode.Fprintf(s, "%v value", t) |
| } else { |
| mode.Fprintf(s, "%v (type %v)", n, t) |
| } |
| return |
| } |
| |
| // TODO inlining produces expressions with ninits. we can't print these yet. |
| |
| if opprec[n.Op] < 0 { |
| n.stmtfmt(s, mode) |
| return |
| } |
| |
| n.exprfmt(s, 0, mode) |
| } |
| |
| func (n *Node) nodedump(s fmt.State, flag FmtFlag, mode fmtMode) { |
| recur := flag&FmtShort == 0 |
| |
| if recur { |
| indent(s) |
| if dumpdepth > 40 { |
| fmt.Fprint(s, "...") |
| return |
| } |
| |
| if n.Ninit.Len() != 0 { |
| mode.Fprintf(s, "%v-init%v", n.Op, n.Ninit) |
| indent(s) |
| } |
| } |
| |
| switch n.Op { |
| default: |
| mode.Fprintf(s, "%v%j", n.Op, n) |
| |
| case OLITERAL: |
| mode.Fprintf(s, "%v-%v%j", n.Op, n.Val(), n) |
| |
| case ONAME, ONONAME: |
| if n.Sym != nil { |
| mode.Fprintf(s, "%v-%v%j", n.Op, n.Sym, n) |
| } else { |
| mode.Fprintf(s, "%v%j", n.Op, n) |
| } |
| if recur && n.Type == nil && n.Name != nil && n.Name.Param != nil && n.Name.Param.Ntype != nil { |
| indent(s) |
| mode.Fprintf(s, "%v-ntype%v", n.Op, n.Name.Param.Ntype) |
| } |
| |
| case OASOP: |
| mode.Fprintf(s, "%v-%v%j", n.Op, n.SubOp(), n) |
| |
| case OTYPE: |
| mode.Fprintf(s, "%v %v%j type=%v", n.Op, n.Sym, n, n.Type) |
| if recur && n.Type == nil && n.Name != nil && n.Name.Param != nil && n.Name.Param.Ntype != nil { |
| indent(s) |
| mode.Fprintf(s, "%v-ntype%v", n.Op, n.Name.Param.Ntype) |
| } |
| } |
| |
| if n.Op == OCLOSURE && n.Func.Closure != nil && n.Func.Closure.Func.Nname.Sym != nil { |
| mode.Fprintf(s, " fnName %v", n.Func.Closure.Func.Nname.Sym) |
| } |
| if n.Sym != nil && n.Op != ONAME { |
| mode.Fprintf(s, " %v", n.Sym) |
| } |
| |
| if n.Type != nil { |
| mode.Fprintf(s, " %v", n.Type) |
| } |
| |
| if recur { |
| if n.Left != nil { |
| mode.Fprintf(s, "%v", n.Left) |
| } |
| if n.Right != nil { |
| mode.Fprintf(s, "%v", n.Right) |
| } |
| if n.Func != nil && n.Func.Closure != nil && n.Func.Closure.Nbody.Len() != 0 { |
| indent(s) |
| // The function associated with a closure |
| mode.Fprintf(s, "%v-clofunc%v", n.Op, n.Func.Closure) |
| } |
| if n.Func != nil && n.Func.Dcl != nil && len(n.Func.Dcl) != 0 { |
| indent(s) |
| // The dcls for a func or closure |
| mode.Fprintf(s, "%v-dcl%v", n.Op, asNodes(n.Func.Dcl)) |
| } |
| if n.List.Len() != 0 { |
| indent(s) |
| mode.Fprintf(s, "%v-list%v", n.Op, n.List) |
| } |
| |
| if n.Rlist.Len() != 0 { |
| indent(s) |
| mode.Fprintf(s, "%v-rlist%v", n.Op, n.Rlist) |
| } |
| |
| if n.Nbody.Len() != 0 { |
| indent(s) |
| mode.Fprintf(s, "%v-body%v", n.Op, n.Nbody) |
| } |
| } |
| } |
| |
| // "%S" suppresses qualifying with package |
| func symFormat(s *types.Sym, f fmt.State, verb rune, mode fmtMode) { |
| switch verb { |
| case 'v', 'S': |
| fmt.Fprint(f, sconv(s, fmtFlag(f, verb), mode)) |
| |
| default: |
| fmt.Fprintf(f, "%%!%c(*types.Sym=%p)", verb, s) |
| } |
| } |
| |
| func smodeString(s *types.Sym, mode fmtMode) string { return sconv(s, 0, mode) } |
| |
| // See #16897 before changing the implementation of sconv. |
| func sconv(s *types.Sym, flag FmtFlag, mode fmtMode) string { |
| if flag&FmtLong != 0 { |
| panic("linksymfmt") |
| } |
| |
| if s == nil { |
| return "<S>" |
| } |
| |
| if s.Name == "_" { |
| return "_" |
| } |
| buf := fmtBufferPool.Get().(*bytes.Buffer) |
| buf.Reset() |
| defer fmtBufferPool.Put(buf) |
| |
| flag, mode = flag.update(mode) |
| symfmt(buf, s, flag, mode) |
| return types.InternString(buf.Bytes()) |
| } |
| |
| func sconv2(b *bytes.Buffer, s *types.Sym, flag FmtFlag, mode fmtMode) { |
| if flag&FmtLong != 0 { |
| panic("linksymfmt") |
| } |
| if s == nil { |
| b.WriteString("<S>") |
| return |
| } |
| if s.Name == "_" { |
| b.WriteString("_") |
| return |
| } |
| |
| flag, mode = flag.update(mode) |
| symfmt(b, s, flag, mode) |
| } |
| |
| func fldconv(b *bytes.Buffer, f *types.Field, flag FmtFlag, mode fmtMode, visited map[*types.Type]int, funarg types.Funarg) { |
| if f == nil { |
| b.WriteString("<T>") |
| return |
| } |
| flag, mode = flag.update(mode) |
| if mode == FTypeIdName { |
| flag |= FmtUnsigned |
| } |
| |
| var name string |
| if flag&FmtShort == 0 { |
| s := f.Sym |
| |
| // Take the name from the original. |
| if mode == FErr { |
| s = origSym(s) |
| } |
| |
| if s != nil && f.Embedded == 0 { |
| if funarg != types.FunargNone { |
| name = asNode(f.Nname).modeString(mode) |
| } else if flag&FmtLong != 0 { |
| name = mode.Sprintf("%0S", s) |
| if !types.IsExported(name) && flag&FmtUnsigned == 0 { |
| name = smodeString(s, mode) // qualify non-exported names (used on structs, not on funarg) |
| } |
| } else { |
| name = smodeString(s, mode) |
| } |
| } |
| } |
| |
| if name != "" { |
| b.WriteString(name) |
| b.WriteString(" ") |
| } |
| |
| if f.IsDDD() { |
| var et *types.Type |
| if f.Type != nil { |
| et = f.Type.Elem() |
| } |
| b.WriteString("...") |
| tconv2(b, et, 0, mode, visited) |
| } else { |
| tconv2(b, f.Type, 0, mode, visited) |
| } |
| |
| if flag&FmtShort == 0 && funarg == types.FunargNone && f.Note != "" { |
| b.WriteString(" ") |
| b.WriteString(strconv.Quote(f.Note)) |
| } |
| } |
| |
| // "%L" print definition, not name |
| // "%S" omit 'func' and receiver from function types, short type names |
| func typeFormat(t *types.Type, s fmt.State, verb rune, mode fmtMode) { |
| switch verb { |
| case 'v', 'S', 'L': |
| fmt.Fprint(s, tconv(t, fmtFlag(s, verb), mode)) |
| default: |
| fmt.Fprintf(s, "%%!%c(*Type=%p)", verb, t) |
| } |
| } |
| |
| func (n *Node) String() string { return fmt.Sprint(n) } |
| func (n *Node) modeString(mode fmtMode) string { return mode.Sprint(n) } |
| |
| // "%L" suffix with "(type %T)" where possible |
| // "%+S" in debug mode, don't recurse, no multiline output |
| func (n *Node) nconv(s fmt.State, flag FmtFlag, mode fmtMode) { |
| if n == nil { |
| fmt.Fprint(s, "<N>") |
| return |
| } |
| |
| flag, mode = flag.update(mode) |
| |
| switch mode { |
| case FErr: |
| n.nodefmt(s, flag, mode) |
| |
| case FDbg: |
| dumpdepth++ |
| n.nodedump(s, flag, mode) |
| dumpdepth-- |
| |
| default: |
| Fatalf("unhandled %%N mode: %d", mode) |
| } |
| } |
| |
| func (l Nodes) format(s fmt.State, verb rune, mode fmtMode) { |
| switch verb { |
| case 'v': |
| l.hconv(s, fmtFlag(s, verb), mode) |
| |
| default: |
| fmt.Fprintf(s, "%%!%c(Nodes)", verb) |
| } |
| } |
| |
| func (n Nodes) String() string { |
| return fmt.Sprint(n) |
| } |
| |
| // Flags: all those of %N plus '.': separate with comma's instead of semicolons. |
| func (l Nodes) hconv(s fmt.State, flag FmtFlag, mode fmtMode) { |
| if l.Len() == 0 && mode == FDbg { |
| fmt.Fprint(s, "<nil>") |
| return |
| } |
| |
| flag, mode = flag.update(mode) |
| sep := "; " |
| if mode == FDbg { |
| sep = "\n" |
| } else if flag&FmtComma != 0 { |
| sep = ", " |
| } |
| |
| for i, n := range l.Slice() { |
| fmt.Fprint(s, n.modeString(mode)) |
| if i+1 < l.Len() { |
| fmt.Fprint(s, sep) |
| } |
| } |
| } |
| |
| func dumplist(s string, l Nodes) { |
| fmt.Printf("%s%+v\n", s, l) |
| } |
| |
| func fdumplist(w io.Writer, s string, l Nodes) { |
| fmt.Fprintf(w, "%s%+v\n", s, l) |
| } |
| |
| func Dump(s string, n *Node) { |
| fmt.Printf("%s [%p]%+v\n", s, n, n) |
| } |
| |
| // TODO(gri) make variable local somehow |
| var dumpdepth int |
| |
| // indent prints indentation to s. |
| func indent(s fmt.State) { |
| fmt.Fprint(s, "\n") |
| for i := 0; i < dumpdepth; i++ { |
| fmt.Fprint(s, ". ") |
| } |
| } |
| |
| func ellipsisIf(b bool) string { |
| if b { |
| return "..." |
| } |
| return "" |
| } |
