/
fmt.go
1736 lines (1500 loc) · 36.4 KB
/
fmt.go
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// 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/internal/obj"
"fmt"
"strconv"
"strings"
"unicode/utf8"
)
//
// Format conversions
// %L int Line numbers
//
// %E int etype values (aka 'Kind')
//
// %O int Node Opcodes
// Flags: "%#O": print go syntax. (automatic unless fmtmode == FDbg)
//
// %J Node* Node details
// Flags: "%hJ" suppresses things not relevant until walk.
//
// %V Val* Constant values
//
// %S Sym* Symbols
// Flags: +,- #: mode (see below)
// "%hS" unqualified identifier in any mode
// "%hhS" in export mode: unqualified identifier if exported, qualified if not
//
// %T Type* Types
// Flags: +,- #: mode (see below)
// 'l' definition instead of name.
// 'h' omit "func" and receiver in function types
// 'u' (only in -/Sym mode) print type identifiers wit package name instead of prefix.
//
// %N Node* Nodes
// Flags: +,- #: mode (see below)
// 'h' (only in +/debug mode) suppress recursion
// 'l' (only in Error mode) print "foo (type Bar)"
//
// %H NodeList* NodeLists
// Flags: those of %N
// ',' separate items with ',' instead of ';'
//
// In mparith1.c:
// %B Mpint* Big integers
// %F Mpflt* Big floats
//
// %S, %T and %N obey use the following flags to set the format mode:
const (
FErr = iota
FDbg
FExp
FTypeId
)
var fmtmode int = FErr
var fmtpkgpfx int // %uT stickyness
//
// E.g. for %S: %+S %#S %-S print an identifier properly qualified for debug/export/internal mode.
//
// The mode flags +, - and # are sticky, meaning they persist through
// recursions of %N, %T and %S, but not the h and l flags. The u flag is
// sticky only on %T recursions and only used in %-/Sym mode.
//
// Useful format combinations:
//
// %+N %+H multiline recursive debug dump of node/nodelist
// %+hN %+hH non recursive debug dump
//
// %#N %#T export format
// %#lT type definition instead of name
// %#hT omit"func" and receiver in function signature
//
// %lN "foo (type Bar)" for error messages
//
// %-T type identifiers
// %-hT type identifiers without "func" and arg names in type signatures (methodsym)
// %-uT type identifiers with package name instead of prefix (typesym, dcommontype, typehash)
//
func setfmode(flags *int) int {
fm := fmtmode
if *flags&obj.FmtSign != 0 {
fmtmode = FDbg
} else if *flags&obj.FmtSharp != 0 {
fmtmode = FExp
} else if *flags&obj.FmtLeft != 0 {
fmtmode = FTypeId
}
*flags &^= (obj.FmtSharp | obj.FmtLeft | obj.FmtSign)
return fm
}
// Fmt "%L": Linenumbers
var goopnames = []string{
OADDR: "&",
OADD: "+",
OADDSTR: "+",
OANDAND: "&&",
OANDNOT: "&^",
OAND: "&",
OAPPEND: "append",
OAS: "=",
OAS2: "=",
OBREAK: "break",
OCALL: "function call", // not actual syntax
OCAP: "cap",
OCASE: "case",
OCLOSE: "close",
OCOMPLEX: "complex",
OCOM: "^",
OCONTINUE: "continue",
OCOPY: "copy",
ODEC: "--",
ODELETE: "delete",
ODEFER: "defer",
ODIV: "/",
OEQ: "==",
OFALL: "fallthrough",
OFOR: "for",
OGE: ">=",
OGOTO: "goto",
OGT: ">",
OIF: "if",
OIMAG: "imag",
OINC: "++",
OIND: "*",
OLEN: "len",
OLE: "<=",
OLSH: "<<",
OLT: "<",
OMAKE: "make",
OMINUS: "-",
OMOD: "%",
OMUL: "*",
ONEW: "new",
ONE: "!=",
ONOT: "!",
OOROR: "||",
OOR: "|",
OPANIC: "panic",
OPLUS: "+",
OPRINTN: "println",
OPRINT: "print",
ORANGE: "range",
OREAL: "real",
ORECV: "<-",
ORECOVER: "recover",
ORETURN: "return",
ORSH: ">>",
OSELECT: "select",
OSEND: "<-",
OSUB: "-",
OSWITCH: "switch",
OXOR: "^",
}
// Fmt "%O": Node opcodes
func Oconv(o int, flag int) string {
if (flag&obj.FmtSharp != 0) || fmtmode != FDbg {
if o >= 0 && o < len(goopnames) && goopnames[o] != "" {
return goopnames[o]
}
}
if o >= 0 && o < len(opnames) && opnames[o] != "" {
return opnames[o]
}
return fmt.Sprintf("O-%d", o)
}
var classnames = []string{
"Pxxx",
"PEXTERN",
"PAUTO",
"PPARAM",
"PPARAMOUT",
"PPARAMREF",
"PFUNC",
}
// Fmt "%J": Node details.
func Jconv(n *Node, flag int) string {
var buf bytes.Buffer
c := flag & obj.FmtShort
if c == 0 && n.Ullman != 0 {
fmt.Fprintf(&buf, " u(%d)", n.Ullman)
}
if c == 0 && n.Addable {
fmt.Fprintf(&buf, " a(%v)", n.Addable)
}
if c == 0 && n.Vargen != 0 {
fmt.Fprintf(&buf, " g(%d)", n.Vargen)
}
if n.Lineno != 0 {
fmt.Fprintf(&buf, " l(%d)", n.Lineno)
}
if c == 0 && n.Xoffset != BADWIDTH {
fmt.Fprintf(&buf, " x(%d%+d)", n.Xoffset, n.Stkdelta)
}
if n.Class != 0 {
s := ""
if n.Class&PHEAP != 0 {
s = ",heap"
}
if int(n.Class&^PHEAP) < len(classnames) {
fmt.Fprintf(&buf, " class(%s%s)", classnames[n.Class&^PHEAP], s)
} else {
fmt.Fprintf(&buf, " class(%d?%s)", n.Class&^PHEAP, s)
}
}
if n.Colas {
fmt.Fprintf(&buf, " colas(%v)", n.Colas)
}
if n.Funcdepth != 0 {
fmt.Fprintf(&buf, " f(%d)", n.Funcdepth)
}
switch n.Esc {
case EscUnknown:
break
case EscHeap:
buf.WriteString(" esc(h)")
case EscScope:
buf.WriteString(" esc(s)")
case EscNone:
buf.WriteString(" esc(no)")
case EscNever:
if c == 0 {
buf.WriteString(" esc(N)")
}
default:
fmt.Fprintf(&buf, " esc(%d)", n.Esc)
}
if n.Escloopdepth != 0 {
fmt.Fprintf(&buf, " ld(%d)", n.Escloopdepth)
}
if c == 0 && n.Typecheck != 0 {
fmt.Fprintf(&buf, " tc(%d)", n.Typecheck)
}
if c == 0 && n.Dodata != 0 {
fmt.Fprintf(&buf, " dd(%d)", n.Dodata)
}
if n.Isddd {
fmt.Fprintf(&buf, " isddd(%v)", n.Isddd)
}
if n.Implicit {
fmt.Fprintf(&buf, " implicit(%v)", n.Implicit)
}
if n.Embedded != 0 {
fmt.Fprintf(&buf, " embedded(%d)", n.Embedded)
}
if n.Addrtaken {
buf.WriteString(" addrtaken")
}
if n.Assigned {
buf.WriteString(" assigned")
}
if c == 0 && n.Used {
fmt.Fprintf(&buf, " used(%v)", n.Used)
}
return buf.String()
}
// Fmt "%V": Values
func Vconv(v *Val, flag int) string {
switch v.Ctype {
case CTINT:
if (flag&obj.FmtSharp != 0) || fmtmode == FExp {
return Bconv(v.U.Xval, obj.FmtSharp)
}
return Bconv(v.U.Xval, 0)
case CTRUNE:
x := Mpgetfix(v.U.Xval)
if ' ' <= x && x < 0x80 && x != '\\' && x != '\'' {
return fmt.Sprintf("'%c'", int(x))
}
if 0 <= x && x < 1<<16 {
return fmt.Sprintf("'\\u%04x'", uint(int(x)))
}
if 0 <= x && x <= utf8.MaxRune {
return fmt.Sprintf("'\\U%08x'", uint64(x))
}
return fmt.Sprintf("('\\x00' + %v)", v.U.Xval)
case CTFLT:
if (flag&obj.FmtSharp != 0) || fmtmode == FExp {
return Fconv(v.U.Fval, 0)
}
return Fconv(v.U.Fval, obj.FmtSharp)
case CTCPLX:
if (flag&obj.FmtSharp != 0) || fmtmode == FExp {
return fmt.Sprintf("(%v+%vi)", &v.U.Cval.Real, &v.U.Cval.Imag)
}
if mpcmpfltc(&v.U.Cval.Real, 0) == 0 {
return fmt.Sprintf("%vi", Fconv(&v.U.Cval.Imag, obj.FmtSharp))
}
if mpcmpfltc(&v.U.Cval.Imag, 0) == 0 {
return Fconv(&v.U.Cval.Real, obj.FmtSharp)
}
if mpcmpfltc(&v.U.Cval.Imag, 0) < 0 {
return fmt.Sprintf("(%v%vi)", Fconv(&v.U.Cval.Real, obj.FmtSharp), Fconv(&v.U.Cval.Imag, obj.FmtSharp))
}
return fmt.Sprintf("(%v+%vi)", Fconv(&v.U.Cval.Real, obj.FmtSharp), Fconv(&v.U.Cval.Imag, obj.FmtSharp))
case CTSTR:
return strconv.Quote(v.U.Sval)
case CTBOOL:
if v.U.Bval {
return "true"
}
return "false"
case CTNIL:
return "nil"
}
return fmt.Sprintf("<ctype=%d>", v.Ctype)
}
/*
s%,%,\n%g
s%\n+%\n%g
s%^[ ]*T%%g
s%,.*%%g
s%.+% [T&] = "&",%g
s%^ ........*\]%&~%g
s%~ %%g
*/
var etnames = []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",
TPTR32: "PTR32",
TPTR64: "PTR64",
TFUNC: "FUNC",
TARRAY: "ARRAY",
TSTRUCT: "STRUCT",
TCHAN: "CHAN",
TMAP: "MAP",
TINTER: "INTER",
TFORW: "FORW",
TFIELD: "FIELD",
TSTRING: "STRING",
TANY: "ANY",
}
// Fmt "%E": etype
func Econv(et int, flag int) string {
if et >= 0 && et < len(etnames) && etnames[et] != "" {
return etnames[et]
}
return fmt.Sprintf("E-%d", et)
}
// Fmt "%S": syms
func symfmt(s *Sym, flag int) string {
if s.Pkg != nil && flag&obj.FmtShort == 0 {
switch fmtmode {
case FErr: // This is for the user
if s.Pkg == localpkg {
return s.Name
}
// If the name was used by multiple packages, display the full path,
if s.Pkg.Name != "" && numImport[s.Pkg.Name] > 1 {
return fmt.Sprintf("%q.%s", s.Pkg.Path, s.Name)
}
return fmt.Sprintf("%s.%s", s.Pkg.Name, s.Name)
case FDbg:
return fmt.Sprintf("%s.%s", s.Pkg.Name, s.Name)
case FTypeId:
if flag&obj.FmtUnsigned != 0 {
return fmt.Sprintf("%s.%s", s.Pkg.Name, s.Name) // dcommontype, typehash
}
return fmt.Sprintf("%s.%s", s.Pkg.Prefix, s.Name) // (methodsym), typesym, weaksym
case FExp:
if s.Name != "" && s.Name[0] == '.' {
Fatal("exporting synthetic symbol %s", s.Name)
}
if s.Pkg != builtinpkg {
return fmt.Sprintf("@%q.%s", s.Pkg.Path, s.Name)
}
}
}
if flag&obj.FmtByte != 0 {
// FmtByte (hh) implies FmtShort (h)
// skip leading "type." in method name
p := s.Name
if i := strings.LastIndex(s.Name, "."); i >= 0 {
p = s.Name[i+1:]
}
// exportname needs to see the name without the prefix too.
if (fmtmode == FExp && !exportname(p)) || fmtmode == FDbg {
return fmt.Sprintf("@%q.%s", s.Pkg.Path, p)
}
return p
}
return 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",
}
func typefmt(t *Type, flag int) string {
if t == nil {
return "<T>"
}
if t == bytetype || t == runetype {
// in %-T mode collapse rune and byte with their originals.
if fmtmode != FTypeId {
return Sconv(t.Sym, obj.FmtShort)
}
t = Types[t.Etype]
}
if t == errortype {
return "error"
}
// Unless the 'l' flag was specified, if the type has a name, just print that name.
if flag&obj.FmtLong == 0 && t.Sym != nil && t.Etype != TFIELD && t != Types[t.Etype] {
switch fmtmode {
case FTypeId:
if flag&obj.FmtShort != 0 {
if t.Vargen != 0 {
return fmt.Sprintf("%v·%d", Sconv(t.Sym, obj.FmtShort), t.Vargen)
}
return Sconv(t.Sym, obj.FmtShort)
}
if flag&obj.FmtUnsigned != 0 {
return Sconv(t.Sym, obj.FmtUnsigned)
}
fallthrough
case FExp:
if t.Sym.Pkg == localpkg && t.Vargen != 0 {
return fmt.Sprintf("%v·%d", t.Sym, t.Vargen)
}
}
return Sconv(t.Sym, 0)
}
if int(t.Etype) < len(basicnames) && basicnames[t.Etype] != "" {
prefix := ""
if fmtmode == FErr && (t == idealbool || t == idealstring) {
prefix = "untyped "
}
return prefix + basicnames[t.Etype]
}
if fmtmode == FDbg {
fmtmode = 0
str := Econv(int(t.Etype), 0) + "-" + typefmt(t, flag)
fmtmode = FDbg
return str
}
switch t.Etype {
case TPTR32, TPTR64:
if fmtmode == FTypeId && (flag&obj.FmtShort != 0) {
return fmt.Sprintf("*%v", Tconv(t.Type, obj.FmtShort))
}
return fmt.Sprintf("*%v", t.Type)
case TARRAY:
if t.Bound >= 0 {
return fmt.Sprintf("[%d]%v", t.Bound, t.Type)
}
if t.Bound == -100 {
return fmt.Sprintf("[...]%v", t.Type)
}
return fmt.Sprintf("[]%v", t.Type)
case TCHAN:
switch t.Chan {
case Crecv:
return fmt.Sprintf("<-chan %v", t.Type)
case Csend:
return fmt.Sprintf("chan<- %v", t.Type)
}
if t.Type != nil && t.Type.Etype == TCHAN && t.Type.Sym == nil && t.Type.Chan == Crecv {
return fmt.Sprintf("chan (%v)", t.Type)
}
return fmt.Sprintf("chan %v", t.Type)
case TMAP:
return fmt.Sprintf("map[%v]%v", t.Down, t.Type)
case TINTER:
var buf bytes.Buffer
buf.WriteString("interface {")
for t1 := t.Type; t1 != nil; t1 = t1.Down {
buf.WriteString(" ")
if exportname(t1.Sym.Name) {
buf.WriteString(Sconv(t1.Sym, obj.FmtShort))
} else {
buf.WriteString(Sconv(t1.Sym, obj.FmtUnsigned))
}
buf.WriteString(Tconv(t1.Type, obj.FmtShort))
if t1.Down != nil {
buf.WriteString(";")
}
}
if t.Type != nil {
buf.WriteString(" ")
}
buf.WriteString("}")
return buf.String()
case TFUNC:
var buf bytes.Buffer
if flag&obj.FmtShort != 0 {
// no leading func
} else {
if t.Thistuple != 0 {
buf.WriteString("method")
buf.WriteString(Tconv(getthisx(t), 0))
buf.WriteString(" ")
}
buf.WriteString("func")
}
buf.WriteString(Tconv(getinargx(t), 0))
switch t.Outtuple {
case 0:
break
case 1:
if fmtmode != FExp {
buf.WriteString(" ")
buf.WriteString(Tconv(getoutargx(t).Type.Type, 0)) // struct->field->field's type
break
}
fallthrough
default:
buf.WriteString(" ")
buf.WriteString(Tconv(getoutargx(t), 0))
}
return buf.String()
case TSTRUCT:
if t.Map != nil {
// Format the bucket struct for map[x]y as map.bucket[x]y.
// This avoids a recursive print that generates very long names.
if t.Map.Bucket == t {
return fmt.Sprintf("map.bucket[%v]%v", t.Map.Down, t.Map.Type)
}
if t.Map.Hmap == t {
return fmt.Sprintf("map.hdr[%v]%v", t.Map.Down, t.Map.Type)
}
if t.Map.Hiter == t {
return fmt.Sprintf("map.iter[%v]%v", t.Map.Down, t.Map.Type)
}
Yyerror("unknown internal map type")
}
var buf bytes.Buffer
if t.Funarg != 0 {
buf.WriteString("(")
if fmtmode == FTypeId || fmtmode == FErr { // no argument names on function signature, and no "noescape"/"nosplit" tags
for t1 := t.Type; t1 != nil; t1 = t1.Down {
buf.WriteString(Tconv(t1, obj.FmtShort))
if t1.Down != nil {
buf.WriteString(", ")
}
}
} else {
for t1 := t.Type; t1 != nil; t1 = t1.Down {
buf.WriteString(Tconv(t1, 0))
if t1.Down != nil {
buf.WriteString(", ")
}
}
}
buf.WriteString(")")
} else {
buf.WriteString("struct {")
for t1 := t.Type; t1 != nil; t1 = t1.Down {
buf.WriteString(" ")
buf.WriteString(Tconv(t1, obj.FmtLong))
if t1.Down != nil {
buf.WriteString(";")
}
}
if t.Type != nil {
buf.WriteString(" ")
}
buf.WriteString("}")
}
return buf.String()
case TFIELD:
var name string
if flag&obj.FmtShort == 0 {
s := t.Sym
// Take the name from the original, lest we substituted it with ~r%d or ~b%d.
// ~r%d is a (formerly) unnamed result.
if (fmtmode == FErr || fmtmode == FExp) && t.Nname != nil {
if t.Nname.Orig != nil {
s = t.Nname.Orig.Sym
if s != nil && s.Name[0] == '~' {
if s.Name[1] == 'r' { // originally an unnamed result
s = nil
} else if s.Name[1] == 'b' { // originally the blank identifier _
s = Lookup("_")
}
}
} else {
s = nil
}
}
if s != nil && t.Embedded == 0 {
if t.Funarg != 0 {
name = Nconv(t.Nname, 0)
} else if flag&obj.FmtLong != 0 {
name = Sconv(s, obj.FmtShort|obj.FmtByte) // qualify non-exported names (used on structs, not on funarg)
} else {
name = Sconv(s, 0)
}
} else if fmtmode == FExp {
// TODO(rsc) this breaks on the eliding of unused arguments in the backend
// when this is fixed, the special case in dcl.c checkarglist can go.
//if(t->funarg)
// fmtstrcpy(fp, "_ ");
//else
if t.Embedded != 0 && s.Pkg != nil && len(s.Pkg.Path) > 0 {
name = fmt.Sprintf("@%q.?", s.Pkg.Path)
} else {
name = "?"
}
}
}
var typ string
if t.Isddd {
typ = "..." + Tconv(t.Type.Type, 0)
} else {
typ = Tconv(t.Type, 0)
}
str := typ
if name != "" {
str = name + " " + typ
}
if flag&obj.FmtShort == 0 && t.Note != nil {
str += " " + strconv.Quote(*t.Note)
}
return str
case TFORW:
if t.Sym != nil {
return fmt.Sprintf("undefined %v", t.Sym)
}
return "undefined"
case TUNSAFEPTR:
if fmtmode == FExp {
return "@\"unsafe\".Pointer"
}
return "unsafe.Pointer"
}
if fmtmode == FExp {
Fatal("missing %v case during export", Econv(int(t.Etype), 0))
}
// Don't know how to handle - fall back to detailed prints.
return fmt.Sprintf("%v <%v> %v", Econv(int(t.Etype), 0), t.Sym, t.Type)
}
// Statements which may be rendered with a simplestmt as init.
func stmtwithinit(op int) bool {
switch op {
case OIF, OFOR, OSWITCH:
return true
}
return false
}
func stmtfmt(n *Node) string {
var f string
// 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 != nil && n.Ninit.Next == nil && n.Ninit.N.Ninit == nil && stmtwithinit(int(n.Op))
// otherwise, print the inits as separate statements
complexinit := n.Ninit != nil && !simpleinit && (fmtmode != FErr)
// but if it was for if/for/switch, put in an extra surrounding block to limit the scope
extrablock := complexinit && stmtwithinit(int(n.Op))
if extrablock {
f += "{"
}
if complexinit {
f += fmt.Sprintf(" %v; ", n.Ninit)
}
switch n.Op {
case ODCL:
if fmtmode == FExp {
switch n.Left.Class &^ PHEAP {
case PPARAM, PPARAMOUT, PAUTO:
f += fmt.Sprintf("var %v %v", n.Left, n.Left.Type)
goto ret
}
}
f += fmt.Sprintf("var %v %v", n.Left.Sym, n.Left.Type)
case ODCLFIELD:
if n.Left != nil {
f += fmt.Sprintf("%v %v", n.Left, n.Right)
} else {
f += Nconv(n.Right, 0)
}
// Don't export "v = <N>" initializing statements, hope they're always
// preceded by the DCL which will be re-parsed and typecheck to reproduce
// the "v = <N>" again.
case OAS, OASWB:
if fmtmode == FExp && n.Right == nil {
break
}
if n.Colas && !complexinit {
f += fmt.Sprintf("%v := %v", n.Left, n.Right)
} else {
f += fmt.Sprintf("%v = %v", n.Left, n.Right)
}
case OASOP:
if n.Implicit {
if n.Etype == OADD {
f += fmt.Sprintf("%v++", n.Left)
} else {
f += fmt.Sprintf("%v--", n.Left)
}
break
}
f += fmt.Sprintf("%v %v= %v", n.Left, Oconv(int(n.Etype), obj.FmtSharp), n.Right)
case OAS2:
if n.Colas && !complexinit {
f += fmt.Sprintf("%v := %v", Hconv(n.List, obj.FmtComma), Hconv(n.Rlist, obj.FmtComma))
break
}
fallthrough
case OAS2DOTTYPE, OAS2FUNC, OAS2MAPR, OAS2RECV:
f += fmt.Sprintf("%v = %v", Hconv(n.List, obj.FmtComma), Hconv(n.Rlist, obj.FmtComma))
case ORETURN:
f += fmt.Sprintf("return %v", Hconv(n.List, obj.FmtComma))
case ORETJMP:
f += fmt.Sprintf("retjmp %v", n.Sym)
case OPROC:
f += fmt.Sprintf("go %v", n.Left)
case ODEFER:
f += fmt.Sprintf("defer %v", n.Left)
case OIF:
if simpleinit {
f += fmt.Sprintf("if %v; %v { %v }", n.Ninit.N, n.Ntest, n.Nbody)
} else {
f += fmt.Sprintf("if %v { %v }", n.Ntest, n.Nbody)
}
if n.Nelse != nil {
f += fmt.Sprintf(" else { %v }", n.Nelse)
}
case OFOR:
if fmtmode == FErr { // TODO maybe only if FmtShort, same below
f += "for loop"
break
}
f += "for"
if simpleinit {
f += fmt.Sprintf(" %v;", n.Ninit.N)
} else if n.Nincr != nil {
f += " ;"
}
if n.Ntest != nil {
f += fmt.Sprintf(" %v", n.Ntest)
}
if n.Nincr != nil {
f += fmt.Sprintf("; %v", n.Nincr)
} else if simpleinit {
f += ";"
}
f += fmt.Sprintf(" { %v }", n.Nbody)
case ORANGE:
if fmtmode == FErr {
f += "for loop"
break
}
if n.List == nil {
f += fmt.Sprintf("for range %v { %v }", n.Right, n.Nbody)
break
}
f += fmt.Sprintf("for %v = range %v { %v }", Hconv(n.List, obj.FmtComma), n.Right, n.Nbody)
case OSELECT, OSWITCH:
if fmtmode == FErr {
f += fmt.Sprintf("%v statement", Oconv(int(n.Op), 0))
break
}
f += Oconv(int(n.Op), obj.FmtSharp)
if simpleinit {
f += fmt.Sprintf(" %v;", n.Ninit.N)
}
if n.Ntest != nil {
f += Nconv(n.Ntest, 0)
}
f += fmt.Sprintf(" { %v }", n.List)
case OCASE, OXCASE:
if n.List != nil {
f += fmt.Sprintf("case %v: %v", Hconv(n.List, obj.FmtComma), n.Nbody)
} else {
f += fmt.Sprintf("default: %v", n.Nbody)
}
case OBREAK,
OCONTINUE,
OGOTO,
OFALL,
OXFALL:
if n.Left != nil {
f += fmt.Sprintf("%v %v", Oconv(int(n.Op), obj.FmtSharp), n.Left)
} else {
f += Oconv(int(n.Op), obj.FmtSharp)
}
case OEMPTY:
break
case OLABEL:
f += fmt.Sprintf("%v: ", n.Left)
}
ret:
if extrablock {
f += "}"
}
return f
}
var opprec = []int{
OAPPEND: 8,
OARRAYBYTESTR: 8,
OARRAYLIT: 8,
OARRAYRUNESTR: 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,
OMAKE: 8,
OMAPLIT: 8,
ONAME: 8,
ONEW: 8,
ONONAME: 8,
OPACK: 8,
OPANIC: 8,
OPAREN: 8,
OPRINTN: 8,
OPRINT: 8,
ORUNESTR: 8,
OSTRARRAYBYTE: 8,
OSTRARRAYRUNE: 8,
OSTRUCTLIT: 8,
OTARRAY: 8,
OTCHAN: 8,
OTFUNC: 8,
OTINTER: 8,
OTMAP: 8,
OTSTRUCT: 8,