mirror of
https://github.com/golang/go.git
synced 2025-12-08 06:10:04 +00:00
3f2cb493e5
Reuse the same mechanisms for handling universal builtins like len to handle unsafe.Sizeof, etc. Allows us to drop package unsafe's export data, and simplifies some code. Updates #17508. Change-Id: I620e0617c24e57e8a2d7cccd0e2de34608779656 Reviewed-on: https://go-review.googlesource.com/31433 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org>
1826 lines
37 KiB
Go
1826 lines
37 KiB
Go
// Copyright 2011 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 gc
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import (
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"cmd/internal/obj"
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"fmt"
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"strconv"
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"strings"
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"unicode/utf8"
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)
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// A FmtFlag value is a set of flags (or 0).
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// They control how the Xconv functions format their values.
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// See the respective function's documentation for details.
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type FmtFlag int
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// TODO(gri) The ' ' flag is not used anymore in %-formats.
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// Eliminate eventually.
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const ( // fmt.Format flag/prec or verb
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FmtLeft FmtFlag = 1 << iota // '-'
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FmtSharp // '#'
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FmtSign // '+'
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FmtUnsigned // ' ' (historic: u flag)
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FmtShort // verb == 'S' (historic: h flag)
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FmtLong // verb == 'L' (historic: l flag)
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FmtComma // '.' (== hasPrec) (historic: , flag)
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FmtByte // '0' (historic: hh flag)
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)
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// fmtFlag computes the (internal) FmtFlag
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// value given the fmt.State and format verb.
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func fmtFlag(s fmt.State, verb rune) FmtFlag {
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var flag FmtFlag
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if s.Flag('-') {
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flag |= FmtLeft
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}
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if s.Flag('#') {
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flag |= FmtSharp
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}
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if s.Flag('+') {
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flag |= FmtSign
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}
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if s.Flag(' ') {
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flag |= FmtUnsigned
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}
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if _, ok := s.Precision(); ok {
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flag |= FmtComma
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}
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if s.Flag('0') {
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flag |= FmtByte
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}
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switch verb {
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case 'S':
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flag |= FmtShort
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case 'L':
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flag |= FmtLong
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}
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return flag
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}
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// Format conversions:
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// TODO(gri) verify these; eliminate those not used anymore
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//
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// %v Op Node opcodes
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// Flags: #: print Go syntax (automatic unless fmtmode == FDbg)
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//
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// %j *Node Node details
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// Flags: 0: suppresses things not relevant until walk
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//
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// %v *Val Constant values
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//
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// %v *Sym Symbols
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// %S unqualified identifier in any mode
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// Flags: +,- #: mode (see below)
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// 0: in export mode: unqualified identifier if exported, qualified if not
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//
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// %v *Type Types
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// %S omit "func" and receiver in function types
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// %L definition instead of name.
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// Flags: +,- #: mode (see below)
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// ' ' (only in -/Sym mode) print type identifiers wit package name instead of prefix.
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//
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// %v *Node Nodes
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// %S (only in +/debug mode) suppress recursion
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// %L (only in Error mode) print "foo (type Bar)"
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// Flags: +,- #: mode (see below)
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//
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// %v Nodes Node lists
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// Flags: those of *Node
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// .: separate items with ',' instead of ';'
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// *Sym, *Type, and *Node types use the flags below to set the format mode
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const (
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FErr = iota
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FDbg
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FTypeId
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)
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var fmtmode int = FErr
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var fmtpkgpfx int // "% v" stickyness for *Type objects
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// The mode flags '+', '-', and '#' are sticky; they persist through
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// recursions of *Node, *Type, and *Sym values. The ' ' flag is
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// sticky only on *Type recursions and only used in %-/*Sym mode.
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//
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// Example: given a *Sym: %+v %#v %-v print an identifier properly qualified for debug/export/internal mode
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// Useful format combinations:
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// TODO(gri): verify these
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//
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// *Node, Nodes:
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// %+v multiline recursive debug dump of *Node/Nodes
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// %+S non-recursive debug dump
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//
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// *Node:
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// %#v Go format
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// %L "foo (type Bar)" for error messages
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//
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// *Type:
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// %#v Go format
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// %#L type definition instead of name
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// %#S omit"func" and receiver in function signature
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//
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// %-v type identifiers
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// %-S type identifiers without "func" and arg names in type signatures (methodsym)
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// %- v type identifiers with package name instead of prefix (typesym, dcommontype, typehash)
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func setfmode(flags *FmtFlag) (fm int) {
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fm = fmtmode
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if *flags&FmtSign != 0 {
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fmtmode = FDbg
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} else if *flags&FmtSharp != 0 {
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// ignore (textual export format no longer supported)
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} else if *flags&FmtLeft != 0 {
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fmtmode = FTypeId
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}
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*flags &^= (FmtSharp | FmtLeft | FmtSign)
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return
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}
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var goopnames = []string{
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OADDR: "&",
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OADD: "+",
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OADDSTR: "+",
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OALIGNOF: "unsafe.Alignof",
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OANDAND: "&&",
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OANDNOT: "&^",
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OAND: "&",
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OAPPEND: "append",
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OAS: "=",
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OAS2: "=",
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OBREAK: "break",
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OCALL: "function call", // not actual syntax
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OCAP: "cap",
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OCASE: "case",
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OCLOSE: "close",
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OCOMPLEX: "complex",
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OCOM: "^",
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OCONTINUE: "continue",
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OCOPY: "copy",
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ODEC: "--",
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ODELETE: "delete",
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ODEFER: "defer",
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ODIV: "/",
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OEQ: "==",
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OFALL: "fallthrough",
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OFOR: "for",
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OGE: ">=",
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OGOTO: "goto",
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OGT: ">",
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OIF: "if",
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OIMAG: "imag",
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OINC: "++",
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OIND: "*",
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OLEN: "len",
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OLE: "<=",
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OLSH: "<<",
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OLT: "<",
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OMAKE: "make",
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OMINUS: "-",
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OMOD: "%",
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OMUL: "*",
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ONEW: "new",
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ONE: "!=",
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ONOT: "!",
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OOFFSETOF: "unsafe.Offsetof",
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OOROR: "||",
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OOR: "|",
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OPANIC: "panic",
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OPLUS: "+",
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OPRINTN: "println",
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OPRINT: "print",
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ORANGE: "range",
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OREAL: "real",
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ORECV: "<-",
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ORECOVER: "recover",
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ORETURN: "return",
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ORSH: ">>",
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OSELECT: "select",
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OSEND: "<-",
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OSIZEOF: "unsafe.Sizeof",
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OSUB: "-",
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OSWITCH: "switch",
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OXOR: "^",
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OXFALL: "fallthrough",
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}
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func (o Op) String() string {
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return fmt.Sprint(o)
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}
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func (o Op) GoString() string {
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return fmt.Sprintf("%#v", o)
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}
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func (o Op) Format(s fmt.State, verb rune) {
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switch verb {
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case 'v':
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o.oconv(s, fmtFlag(s, verb))
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default:
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fmt.Fprintf(s, "%%!%c(Op=%d)", verb, int(o))
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}
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}
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func (o Op) oconv(s fmt.State, flag FmtFlag) {
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if (flag&FmtSharp != 0) || fmtmode != FDbg {
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if o >= 0 && int(o) < len(goopnames) && goopnames[o] != "" {
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fmt.Fprint(s, goopnames[o])
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return
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}
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}
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if o >= 0 && int(o) < len(opnames) && opnames[o] != "" {
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fmt.Fprint(s, opnames[o])
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return
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}
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fmt.Fprintf(s, "O-%d", int(o))
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}
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var classnames = []string{
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"Pxxx",
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"PEXTERN",
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"PAUTO",
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"PAUTOHEAP",
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"PPARAM",
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"PPARAMOUT",
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"PFUNC",
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}
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func (n *Node) Format(s fmt.State, verb rune) {
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switch verb {
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case 'v', 'S', 'L':
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n.Nconv(s, fmtFlag(s, verb))
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case 'j':
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n.jconv(s, fmtFlag(s, verb))
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default:
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fmt.Fprintf(s, "%%!%c(*Node=%p)", verb, n)
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}
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}
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// *Node details
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func (n *Node) jconv(s fmt.State, flag FmtFlag) {
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c := flag & FmtShort
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if c == 0 && n.Ullman != 0 {
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fmt.Fprintf(s, " u(%d)", n.Ullman)
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}
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if c == 0 && n.Addable {
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fmt.Fprintf(s, " a(%v)", n.Addable)
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}
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if c == 0 && n.Name != nil && n.Name.Vargen != 0 {
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fmt.Fprintf(s, " g(%d)", n.Name.Vargen)
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}
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if n.Lineno != 0 {
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fmt.Fprintf(s, " l(%d)", n.Lineno)
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}
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if c == 0 && n.Xoffset != BADWIDTH {
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fmt.Fprintf(s, " x(%d)", n.Xoffset)
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}
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if n.Class != 0 {
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if int(n.Class) < len(classnames) {
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fmt.Fprintf(s, " class(%s)", classnames[n.Class])
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} else {
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fmt.Fprintf(s, " class(%d?)", n.Class)
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}
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}
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if n.Colas {
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fmt.Fprintf(s, " colas(%v)", n.Colas)
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}
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if n.Name != nil && n.Name.Funcdepth != 0 {
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fmt.Fprintf(s, " f(%d)", n.Name.Funcdepth)
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}
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if n.Func != nil && n.Func.Depth != 0 {
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fmt.Fprintf(s, " ff(%d)", n.Func.Depth)
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}
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switch n.Esc {
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case EscUnknown:
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break
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case EscHeap:
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fmt.Fprint(s, " esc(h)")
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case EscScope:
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fmt.Fprint(s, " esc(s)")
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case EscNone:
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fmt.Fprint(s, " esc(no)")
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case EscNever:
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if c == 0 {
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fmt.Fprint(s, " esc(N)")
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}
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default:
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fmt.Fprintf(s, " esc(%d)", n.Esc)
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}
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if e, ok := n.Opt().(*NodeEscState); ok && e.Loopdepth != 0 {
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fmt.Fprintf(s, " ld(%d)", e.Loopdepth)
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}
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if c == 0 && n.Typecheck != 0 {
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fmt.Fprintf(s, " tc(%d)", n.Typecheck)
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}
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if c == 0 && n.IsStatic {
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fmt.Fprint(s, " static")
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}
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if n.Isddd {
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fmt.Fprintf(s, " isddd(%v)", n.Isddd)
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}
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if n.Implicit {
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fmt.Fprintf(s, " implicit(%v)", n.Implicit)
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}
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if n.Embedded != 0 {
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fmt.Fprintf(s, " embedded(%d)", n.Embedded)
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}
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if n.Addrtaken {
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fmt.Fprint(s, " addrtaken")
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}
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if n.Assigned {
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fmt.Fprint(s, " assigned")
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}
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if n.Bounded {
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fmt.Fprint(s, " bounded")
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}
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if n.NonNil {
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fmt.Fprint(s, " nonnil")
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}
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if c == 0 && n.Used {
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fmt.Fprintf(s, " used(%v)", n.Used)
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}
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}
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func (v Val) Format(s fmt.State, verb rune) {
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switch verb {
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case 'v':
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v.vconv(s, fmtFlag(s, verb))
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default:
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fmt.Fprintf(s, "%%!%c(Val=%T)", verb, v)
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}
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}
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func (v Val) vconv(s fmt.State, flag FmtFlag) {
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switch u := v.U.(type) {
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case *Mpint:
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if !u.Rune {
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if flag&FmtSharp != 0 {
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fmt.Fprint(s, bconv(u, FmtSharp))
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return
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}
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fmt.Fprint(s, bconv(u, 0))
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return
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}
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switch x := u.Int64(); {
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case ' ' <= x && x < utf8.RuneSelf && x != '\\' && x != '\'':
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fmt.Fprintf(s, "'%c'", int(x))
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case 0 <= x && x < 1<<16:
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fmt.Fprintf(s, "'\\u%04x'", uint(int(x)))
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case 0 <= x && x <= utf8.MaxRune:
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fmt.Fprintf(s, "'\\U%08x'", uint64(x))
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default:
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fmt.Fprintf(s, "('\\x00' + %v)", u)
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}
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case *Mpflt:
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if flag&FmtSharp != 0 {
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fmt.Fprint(s, fconv(u, 0))
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return
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}
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fmt.Fprint(s, fconv(u, FmtSharp))
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return
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case *Mpcplx:
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switch {
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case flag&FmtSharp != 0:
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fmt.Fprintf(s, "(%v+%vi)", &u.Real, &u.Imag)
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case v.U.(*Mpcplx).Real.CmpFloat64(0) == 0:
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fmt.Fprintf(s, "%vi", fconv(&u.Imag, FmtSharp))
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case v.U.(*Mpcplx).Imag.CmpFloat64(0) == 0:
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fmt.Fprint(s, fconv(&u.Real, FmtSharp))
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case v.U.(*Mpcplx).Imag.CmpFloat64(0) < 0:
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fmt.Fprintf(s, "(%v%vi)", fconv(&u.Real, FmtSharp), fconv(&u.Imag, FmtSharp))
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default:
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fmt.Fprintf(s, "(%v+%vi)", fconv(&u.Real, FmtSharp), fconv(&u.Imag, FmtSharp))
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}
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case string:
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fmt.Fprint(s, strconv.Quote(u))
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case bool:
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t := "false"
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if u {
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t = "true"
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}
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fmt.Fprint(s, t)
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case *NilVal:
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fmt.Fprint(s, "nil")
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default:
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fmt.Fprintf(s, "<ctype=%d>", v.Ctype())
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}
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}
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|
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/*
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s%,%,\n%g
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s%\n+%\n%g
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s%^[ ]*T%%g
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s%,.*%%g
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s%.+% [T&] = "&",%g
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s%^ ........*\]%&~%g
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s%~ %%g
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*/
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var etnames = []string{
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Txxx: "Txxx",
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TINT: "INT",
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TUINT: "UINT",
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TINT8: "INT8",
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|
TUINT8: "UINT8",
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|
TINT16: "INT16",
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|
TUINT16: "UINT16",
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|
TINT32: "INT32",
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|
TUINT32: "UINT32",
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|
TINT64: "INT64",
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|
TUINT64: "UINT64",
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|
TUINTPTR: "UINTPTR",
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|
TFLOAT32: "FLOAT32",
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|
TFLOAT64: "FLOAT64",
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|
TCOMPLEX64: "COMPLEX64",
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|
TCOMPLEX128: "COMPLEX128",
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|
TBOOL: "BOOL",
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|
TPTR32: "PTR32",
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|
TPTR64: "PTR64",
|
|
TFUNC: "FUNC",
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|
TARRAY: "ARRAY",
|
|
TSLICE: "SLICE",
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|
TSTRUCT: "STRUCT",
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TCHAN: "CHAN",
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|
TMAP: "MAP",
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|
TINTER: "INTER",
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|
TFORW: "FORW",
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|
TSTRING: "STRING",
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TUNSAFEPTR: "TUNSAFEPTR",
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TANY: "ANY",
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|
TIDEAL: "TIDEAL",
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|
TNIL: "TNIL",
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TBLANK: "TBLANK",
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TFUNCARGS: "TFUNCARGS",
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TCHANARGS: "TCHANARGS",
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TINTERMETH: "TINTERMETH",
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TDDDFIELD: "TDDDFIELD",
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}
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|
|
func (et EType) String() string {
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|
if int(et) < len(etnames) && etnames[et] != "" {
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return etnames[et]
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}
|
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return fmt.Sprintf("E-%d", et)
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}
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|
|
func (s *Sym) symfmt(flag FmtFlag) string {
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if s.Pkg != nil && flag&FmtShort == 0 {
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switch fmtmode {
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|
case FErr: // This is for the user
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|
if s.Pkg == builtinpkg || s.Pkg == localpkg {
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return s.Name
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|
}
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|
|
|
// If the name was used by multiple packages, display the full path,
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|
if s.Pkg.Name != "" && numImport[s.Pkg.Name] > 1 {
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return fmt.Sprintf("%q.%s", s.Pkg.Path, s.Name)
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}
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return s.Pkg.Name + "." + s.Name
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|
|
case FDbg:
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|
return s.Pkg.Name + "." + s.Name
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|
|
case FTypeId:
|
|
if flag&FmtUnsigned != 0 {
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|
return s.Pkg.Name + "." + s.Name // dcommontype, typehash
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|
}
|
|
return s.Pkg.Prefix + "." + s.Name // (methodsym), typesym, weaksym
|
|
}
|
|
}
|
|
|
|
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 fmtmode == FDbg {
|
|
return fmt.Sprintf("@%q.%s", s.Pkg.Path, name)
|
|
}
|
|
|
|
return name
|
|
}
|
|
|
|
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 (t *Type) typefmt(flag FmtFlag) 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 t.Sym.sconv(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&FmtLong == 0 && t.Sym != nil && t != Types[t.Etype] {
|
|
switch fmtmode {
|
|
case FTypeId:
|
|
if flag&FmtShort != 0 {
|
|
if t.Vargen != 0 {
|
|
return fmt.Sprintf("%v·%d", t.Sym.sconv(FmtShort), t.Vargen)
|
|
}
|
|
return t.Sym.sconv(FmtShort)
|
|
}
|
|
|
|
if flag&FmtUnsigned != 0 {
|
|
return t.Sym.sconv(FmtUnsigned)
|
|
}
|
|
|
|
if t.Sym.Pkg == localpkg && t.Vargen != 0 {
|
|
return fmt.Sprintf("%v·%d", t.Sym, t.Vargen)
|
|
}
|
|
}
|
|
|
|
return t.Sym.String()
|
|
}
|
|
|
|
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 := t.Etype.String() + "-" + t.typefmt(flag)
|
|
fmtmode = FDbg
|
|
return str
|
|
}
|
|
|
|
switch t.Etype {
|
|
case TPTR32, TPTR64:
|
|
if fmtmode == FTypeId && (flag&FmtShort != 0) {
|
|
return "*" + t.Elem().tconv(FmtShort)
|
|
}
|
|
return "*" + t.Elem().String()
|
|
|
|
case TARRAY:
|
|
if t.isDDDArray() {
|
|
return "[...]" + t.Elem().String()
|
|
}
|
|
return fmt.Sprintf("[%d]%v", t.NumElem(), t.Elem())
|
|
|
|
case TSLICE:
|
|
return "[]" + t.Elem().String()
|
|
|
|
case TCHAN:
|
|
switch t.ChanDir() {
|
|
case Crecv:
|
|
return "<-chan " + t.Elem().String()
|
|
|
|
case Csend:
|
|
return "chan<- " + t.Elem().String()
|
|
}
|
|
|
|
if t.Elem() != nil && t.Elem().IsChan() && t.Elem().Sym == nil && t.Elem().ChanDir() == Crecv {
|
|
return "chan (" + t.Elem().String() + ")"
|
|
}
|
|
return "chan " + t.Elem().String()
|
|
|
|
case TMAP:
|
|
return "map[" + t.Key().String() + "]" + t.Val().String()
|
|
|
|
case TINTER:
|
|
if t.IsEmptyInterface() {
|
|
return "interface {}"
|
|
}
|
|
buf := make([]byte, 0, 64)
|
|
buf = append(buf, "interface {"...)
|
|
for i, f := range t.Fields().Slice() {
|
|
if i != 0 {
|
|
buf = append(buf, ';')
|
|
}
|
|
buf = append(buf, ' ')
|
|
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 exportname(f.Sym.Name):
|
|
buf = append(buf, f.Sym.sconv(FmtShort)...)
|
|
default:
|
|
buf = append(buf, f.Sym.sconv(FmtUnsigned)...)
|
|
}
|
|
buf = append(buf, f.Type.tconv(FmtShort)...)
|
|
}
|
|
if t.NumFields() != 0 {
|
|
buf = append(buf, ' ')
|
|
}
|
|
buf = append(buf, '}')
|
|
return string(buf)
|
|
|
|
case TFUNC:
|
|
buf := make([]byte, 0, 64)
|
|
if flag&FmtShort != 0 {
|
|
// no leading func
|
|
} else {
|
|
if t.Recv() != nil {
|
|
buf = append(buf, "method"...)
|
|
buf = append(buf, t.Recvs().String()...)
|
|
buf = append(buf, ' ')
|
|
}
|
|
buf = append(buf, "func"...)
|
|
}
|
|
buf = append(buf, t.Params().String()...)
|
|
|
|
switch t.Results().NumFields() {
|
|
case 0:
|
|
// nothing to do
|
|
|
|
case 1:
|
|
buf = append(buf, ' ')
|
|
buf = append(buf, t.Results().Field(0).Type.String()...) // struct->field->field's type
|
|
|
|
default:
|
|
buf = append(buf, ' ')
|
|
buf = append(buf, t.Results().String()...)
|
|
}
|
|
return string(buf)
|
|
|
|
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.
|
|
if mt.Bucket == t {
|
|
return "map.bucket[" + m.Key().String() + "]" + m.Val().String()
|
|
}
|
|
|
|
if mt.Hmap == t {
|
|
return "map.hdr[" + m.Key().String() + "]" + m.Val().String()
|
|
}
|
|
|
|
if mt.Hiter == t {
|
|
return "map.iter[" + m.Key().String() + "]" + m.Val().String()
|
|
}
|
|
|
|
yyerror("unknown internal map type")
|
|
}
|
|
|
|
buf := make([]byte, 0, 64)
|
|
if t.IsFuncArgStruct() {
|
|
buf = append(buf, '(')
|
|
var flag1 FmtFlag
|
|
if fmtmode == FTypeId || fmtmode == FErr { // no argument names on function signature, and no "noescape"/"nosplit" tags
|
|
flag1 = FmtShort
|
|
}
|
|
for i, f := range t.Fields().Slice() {
|
|
if i != 0 {
|
|
buf = append(buf, ", "...)
|
|
}
|
|
buf = append(buf, fldconv(f, flag1)...)
|
|
}
|
|
buf = append(buf, ')')
|
|
} else {
|
|
buf = append(buf, "struct {"...)
|
|
for i, f := range t.Fields().Slice() {
|
|
if i != 0 {
|
|
buf = append(buf, ';')
|
|
}
|
|
buf = append(buf, ' ')
|
|
buf = append(buf, fldconv(f, FmtLong)...)
|
|
}
|
|
if t.NumFields() != 0 {
|
|
buf = append(buf, ' ')
|
|
}
|
|
buf = append(buf, '}')
|
|
}
|
|
return string(buf)
|
|
|
|
case TFORW:
|
|
if t.Sym != nil {
|
|
return "undefined " + t.Sym.String()
|
|
}
|
|
return "undefined"
|
|
|
|
case TUNSAFEPTR:
|
|
return "unsafe.Pointer"
|
|
|
|
case TDDDFIELD:
|
|
return fmt.Sprintf("%v <%v> %v", t.Etype, t.Sym, t.DDDField())
|
|
|
|
case Txxx:
|
|
return "Txxx"
|
|
}
|
|
|
|
// Don't know how to handle - fall back to detailed prints.
|
|
return fmt.Sprintf("%v <%v> %v", t.Etype, t.Sym, t.Elem())
|
|
}
|
|
|
|
// Statements which may be rendered with a simplestmt as init.
|
|
func stmtwithinit(op Op) bool {
|
|
switch op {
|
|
case OIF, OFOR, OSWITCH:
|
|
return true
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
func (n *Node) stmtfmt(s fmt.State) {
|
|
// 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 && (fmtmode != 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 {
|
|
fmt.Fprintf(s, " %v; ", n.Ninit)
|
|
}
|
|
|
|
switch n.Op {
|
|
case ODCL:
|
|
fmt.Fprintf(s, "var %v %v", n.Left.Sym, n.Left.Type)
|
|
|
|
case ODCLFIELD:
|
|
if n.Left != nil {
|
|
fmt.Fprintf(s, "%v %v", n.Left, n.Right)
|
|
} else {
|
|
fmt.Fprintf(s, "%v", n.Right)
|
|
}
|
|
|
|
// 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, OASWB:
|
|
if n.Colas && !complexinit {
|
|
fmt.Fprintf(s, "%v := %v", n.Left, n.Right)
|
|
} else {
|
|
fmt.Fprintf(s, "%v = %v", n.Left, n.Right)
|
|
}
|
|
|
|
case OASOP:
|
|
if n.Implicit {
|
|
if Op(n.Etype) == OADD {
|
|
fmt.Fprintf(s, "%v++", n.Left)
|
|
} else {
|
|
fmt.Fprintf(s, "%v--", n.Left)
|
|
}
|
|
break
|
|
}
|
|
|
|
fmt.Fprintf(s, "%v %#v= %v", n.Left, Op(n.Etype), n.Right)
|
|
|
|
case OAS2:
|
|
if n.Colas && !complexinit {
|
|
fmt.Fprintf(s, "%.v := %.v", n.List, n.Rlist)
|
|
break
|
|
}
|
|
fallthrough
|
|
|
|
case OAS2DOTTYPE, OAS2FUNC, OAS2MAPR, OAS2RECV:
|
|
fmt.Fprintf(s, "%.v = %.v", n.List, n.Rlist)
|
|
|
|
case ORETURN:
|
|
fmt.Fprintf(s, "return %.v", n.List)
|
|
|
|
case ORETJMP:
|
|
fmt.Fprintf(s, "retjmp %v", n.Sym)
|
|
|
|
case OPROC:
|
|
fmt.Fprintf(s, "go %v", n.Left)
|
|
|
|
case ODEFER:
|
|
fmt.Fprintf(s, "defer %v", n.Left)
|
|
|
|
case OIF:
|
|
if simpleinit {
|
|
fmt.Fprintf(s, "if %v; %v { %v }", n.Ninit.First(), n.Left, n.Nbody)
|
|
} else {
|
|
fmt.Fprintf(s, "if %v { %v }", n.Left, n.Nbody)
|
|
}
|
|
if n.Rlist.Len() != 0 {
|
|
fmt.Fprintf(s, " else { %v }", n.Rlist)
|
|
}
|
|
|
|
case OFOR:
|
|
if fmtmode == FErr { // TODO maybe only if FmtShort, same below
|
|
fmt.Fprint(s, "for loop")
|
|
break
|
|
}
|
|
|
|
fmt.Fprint(s, "for")
|
|
if simpleinit {
|
|
fmt.Fprintf(s, " %v;", n.Ninit.First())
|
|
} else if n.Right != nil {
|
|
fmt.Fprint(s, " ;")
|
|
}
|
|
|
|
if n.Left != nil {
|
|
fmt.Fprintf(s, " %v", n.Left)
|
|
}
|
|
|
|
if n.Right != nil {
|
|
fmt.Fprintf(s, "; %v", n.Right)
|
|
} else if simpleinit {
|
|
fmt.Fprint(s, ";")
|
|
}
|
|
|
|
fmt.Fprintf(s, " { %v }", n.Nbody)
|
|
|
|
case ORANGE:
|
|
if fmtmode == FErr {
|
|
fmt.Fprint(s, "for loop")
|
|
break
|
|
}
|
|
|
|
if n.List.Len() == 0 {
|
|
fmt.Fprintf(s, "for range %v { %v }", n.Right, n.Nbody)
|
|
break
|
|
}
|
|
|
|
fmt.Fprintf(s, "for %.v = range %v { %v }", n.List, n.Right, n.Nbody)
|
|
|
|
case OSELECT, OSWITCH:
|
|
if fmtmode == FErr {
|
|
fmt.Fprintf(s, "%v statement", n.Op)
|
|
break
|
|
}
|
|
|
|
fmt.Fprint(s, n.Op.GoString()) // %#v
|
|
if simpleinit {
|
|
fmt.Fprintf(s, " %v;", n.Ninit.First())
|
|
}
|
|
if n.Left != nil {
|
|
fmt.Fprintf(s, " %v ", n.Left)
|
|
}
|
|
|
|
fmt.Fprintf(s, " { %v }", n.List)
|
|
|
|
case OXCASE:
|
|
if n.List.Len() != 0 {
|
|
fmt.Fprintf(s, "case %.v", n.List)
|
|
} else {
|
|
fmt.Fprint(s, "default")
|
|
}
|
|
fmt.Fprintf(s, ": %v", n.Nbody)
|
|
|
|
case OCASE:
|
|
switch {
|
|
case n.Left != nil:
|
|
// single element
|
|
fmt.Fprintf(s, "case %v", n.Left)
|
|
case n.List.Len() > 0:
|
|
// range
|
|
if n.List.Len() != 2 {
|
|
Fatalf("bad OCASE list length %d", n.List.Len())
|
|
}
|
|
fmt.Fprintf(s, "case %v..%v", n.List.First(), n.List.Second())
|
|
default:
|
|
fmt.Fprint(s, "default")
|
|
}
|
|
fmt.Fprintf(s, ": %v", n.Nbody)
|
|
|
|
case OBREAK,
|
|
OCONTINUE,
|
|
OGOTO,
|
|
OFALL,
|
|
OXFALL:
|
|
if n.Left != nil {
|
|
fmt.Fprintf(s, "%#v %v", n.Op, n.Left)
|
|
} else {
|
|
fmt.Fprint(s, n.Op.GoString()) // %#v
|
|
}
|
|
|
|
case OEMPTY:
|
|
break
|
|
|
|
case OLABEL:
|
|
fmt.Fprintf(s, "%v: ", n.Left)
|
|
}
|
|
|
|
if extrablock {
|
|
fmt.Fprint(s, "}")
|
|
}
|
|
}
|
|
|
|
var opprec = []int{
|
|
OALIGNOF: 8,
|
|
OAPPEND: 8,
|
|
OARRAYBYTESTR: 8,
|
|
OARRAYLIT: 8,
|
|
OSLICELIT: 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,
|
|
OOFFSETOF: 8,
|
|
OPACK: 8,
|
|
OPANIC: 8,
|
|
OPAREN: 8,
|
|
OPRINTN: 8,
|
|
OPRINT: 8,
|
|
ORUNESTR: 8,
|
|
OSIZEOF: 8,
|
|
OSTRARRAYBYTE: 8,
|
|
OSTRARRAYRUNE: 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,
|
|
ODOTINTER: 8,
|
|
ODOTMETH: 8,
|
|
ODOTPTR: 8,
|
|
ODOTTYPE2: 8,
|
|
ODOTTYPE: 8,
|
|
ODOT: 8,
|
|
OXDOT: 8,
|
|
OCALLPART: 8,
|
|
OPLUS: 7,
|
|
ONOT: 7,
|
|
OCOM: 7,
|
|
OMINUS: 7,
|
|
OADDR: 7,
|
|
OIND: 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,
|
|
OCMPSTR: 4,
|
|
OCMPIFACE: 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,
|
|
OGOTO: -1,
|
|
OIF: -1,
|
|
OLABEL: -1,
|
|
OPROC: -1,
|
|
ORANGE: -1,
|
|
ORETURN: -1,
|
|
OSELECT: -1,
|
|
OSWITCH: -1,
|
|
OXCASE: -1,
|
|
OXFALL: -1,
|
|
OEND: 0,
|
|
}
|
|
|
|
func (n *Node) exprfmt(s fmt.State, prec int) {
|
|
for n != nil && n.Implicit && (n.Op == OIND || 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 {
|
|
fmt.Fprintf(s, "(%v)", n)
|
|
return
|
|
}
|
|
|
|
switch n.Op {
|
|
case OPAREN:
|
|
fmt.Fprintf(s, "(%v)", n.Left)
|
|
|
|
case ODDDARG:
|
|
fmt.Fprint(s, "... argument")
|
|
|
|
case OREGISTER:
|
|
fmt.Fprint(s, obj.Rconv(int(n.Reg)))
|
|
|
|
case OLITERAL: // this is a bit of a mess
|
|
if fmtmode == FErr {
|
|
if n.Orig != nil && n.Orig != n {
|
|
n.Orig.exprfmt(s, prec)
|
|
return
|
|
}
|
|
if n.Sym != nil {
|
|
fmt.Fprint(s, n.Sym.String())
|
|
return
|
|
}
|
|
}
|
|
if n.Val().Ctype() == CTNIL && n.Orig != nil && n.Orig != n {
|
|
n.Orig.exprfmt(s, prec)
|
|
return
|
|
}
|
|
if n.Type != nil && n.Type.Etype != TIDEAL && n.Type.Etype != TNIL && n.Type != idealbool && n.Type != idealstring {
|
|
// 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() == Crecv) {
|
|
fmt.Fprintf(s, "(%v)(%v)", n.Type, n.Val())
|
|
return
|
|
} else {
|
|
fmt.Fprintf(s, "%v(%v)", n.Type, n.Val())
|
|
return
|
|
}
|
|
}
|
|
|
|
fmt.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 fmtmode == FErr && n.Sym != nil && n.Sym.Name[0] == '~' && n.Sym.Name[1] == 'b' {
|
|
fmt.Fprint(s, "_")
|
|
return
|
|
}
|
|
fallthrough
|
|
case OPACK, ONONAME:
|
|
fmt.Fprint(s, n.Sym.String())
|
|
|
|
case OTYPE:
|
|
if n.Type == nil && n.Sym != nil {
|
|
fmt.Fprint(s, n.Sym.String())
|
|
return
|
|
}
|
|
fmt.Fprintf(s, "%v", n.Type)
|
|
|
|
case OTARRAY:
|
|
if n.Left != nil {
|
|
fmt.Fprintf(s, "[]%v", n.Left)
|
|
return
|
|
}
|
|
fmt.Fprintf(s, "[]%v", n.Right) // happens before typecheck
|
|
|
|
case OTMAP:
|
|
fmt.Fprintf(s, "map[%v]%v", n.Left, n.Right)
|
|
|
|
case OTCHAN:
|
|
switch ChanDir(n.Etype) {
|
|
case Crecv:
|
|
fmt.Fprintf(s, "<-chan %v", n.Left)
|
|
|
|
case Csend:
|
|
fmt.Fprintf(s, "chan<- %v", n.Left)
|
|
|
|
default:
|
|
if n.Left != nil && n.Left.Op == OTCHAN && n.Left.Sym == nil && ChanDir(n.Left.Etype) == Crecv {
|
|
fmt.Fprintf(s, "chan (%v)", n.Left)
|
|
} else {
|
|
fmt.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 fmtmode == FErr {
|
|
fmt.Fprint(s, "func literal")
|
|
return
|
|
}
|
|
if n.Nbody.Len() != 0 {
|
|
fmt.Fprintf(s, "%v { %v }", n.Type, n.Nbody)
|
|
return
|
|
}
|
|
fmt.Fprintf(s, "%v { %v }", n.Type, n.Func.Closure.Nbody)
|
|
|
|
case OCOMPLIT:
|
|
ptrlit := n.Right != nil && n.Right.Implicit && n.Right.Type != nil && n.Right.Type.IsPtr()
|
|
if fmtmode == FErr {
|
|
if n.Right != nil && n.Right.Type != nil && !n.Implicit {
|
|
if ptrlit {
|
|
fmt.Fprintf(s, "&%v literal", n.Right.Type.Elem())
|
|
return
|
|
} else {
|
|
fmt.Fprintf(s, "%v literal", n.Right.Type)
|
|
return
|
|
}
|
|
}
|
|
|
|
fmt.Fprint(s, "composite literal")
|
|
return
|
|
}
|
|
fmt.Fprintf(s, "(%v{ %.v })", n.Right, n.List)
|
|
|
|
case OPTRLIT:
|
|
fmt.Fprintf(s, "&%v", n.Left)
|
|
|
|
case OSTRUCTLIT, OARRAYLIT, OSLICELIT, OMAPLIT:
|
|
if fmtmode == FErr {
|
|
fmt.Fprintf(s, "%v literal", n.Type)
|
|
return
|
|
}
|
|
fmt.Fprintf(s, "(%v{ %.v })", n.Type, n.List)
|
|
|
|
case OKEY:
|
|
if n.Left != nil && n.Right != nil {
|
|
fmt.Fprintf(s, "%v:%v", n.Left, n.Right)
|
|
return
|
|
}
|
|
|
|
if n.Left == nil && n.Right != nil {
|
|
fmt.Fprintf(s, ":%v", n.Right)
|
|
return
|
|
}
|
|
if n.Left != nil && n.Right == nil {
|
|
fmt.Fprintf(s, "%v:", n.Left)
|
|
return
|
|
}
|
|
fmt.Fprint(s, ":")
|
|
|
|
case OSTRUCTKEY:
|
|
fmt.Fprintf(s, "%v:%v", n.Sym, n.Left)
|
|
|
|
case OCALLPART:
|
|
n.Left.exprfmt(s, nprec)
|
|
if n.Right == nil || n.Right.Sym == nil {
|
|
fmt.Fprint(s, ".<nil>")
|
|
return
|
|
}
|
|
fmt.Fprintf(s, ".%0S", n.Right.Sym)
|
|
|
|
case OXDOT, ODOT, ODOTPTR, ODOTINTER, ODOTMETH:
|
|
n.Left.exprfmt(s, nprec)
|
|
if n.Sym == nil {
|
|
fmt.Fprint(s, ".<nil>")
|
|
return
|
|
}
|
|
fmt.Fprintf(s, ".%0S", n.Sym)
|
|
|
|
case ODOTTYPE, ODOTTYPE2:
|
|
n.Left.exprfmt(s, nprec)
|
|
if n.Right != nil {
|
|
fmt.Fprintf(s, ".(%v)", n.Right)
|
|
return
|
|
}
|
|
fmt.Fprintf(s, ".(%v)", n.Type)
|
|
|
|
case OINDEX, OINDEXMAP:
|
|
n.Left.exprfmt(s, nprec)
|
|
fmt.Fprintf(s, "[%v]", n.Right)
|
|
|
|
case OSLICE, OSLICESTR, OSLICEARR, OSLICE3, OSLICE3ARR:
|
|
n.Left.exprfmt(s, nprec)
|
|
fmt.Fprint(s, "[")
|
|
low, high, max := n.SliceBounds()
|
|
if low != nil {
|
|
fmt.Fprint(s, low.String())
|
|
}
|
|
fmt.Fprint(s, ":")
|
|
if high != nil {
|
|
fmt.Fprint(s, high.String())
|
|
}
|
|
if n.Op.IsSlice3() {
|
|
fmt.Fprint(s, ":")
|
|
if max != nil {
|
|
fmt.Fprint(s, max.String())
|
|
}
|
|
}
|
|
fmt.Fprint(s, "]")
|
|
|
|
case OCOPY, OCOMPLEX:
|
|
fmt.Fprintf(s, "%#v(%v, %v)", n.Op, n.Left, n.Right)
|
|
|
|
case OCONV,
|
|
OCONVIFACE,
|
|
OCONVNOP,
|
|
OARRAYBYTESTR,
|
|
OARRAYRUNESTR,
|
|
OSTRARRAYBYTE,
|
|
OSTRARRAYRUNE,
|
|
ORUNESTR:
|
|
if n.Type == nil || n.Type.Sym == nil {
|
|
fmt.Fprintf(s, "(%v)(%v)", n.Type, n.Left)
|
|
return
|
|
}
|
|
if n.Left != nil {
|
|
fmt.Fprintf(s, "%v(%v)", n.Type, n.Left)
|
|
return
|
|
}
|
|
fmt.Fprintf(s, "%v(%.v)", n.Type, n.List)
|
|
|
|
case OREAL,
|
|
OIMAG,
|
|
OAPPEND,
|
|
OCAP,
|
|
OCLOSE,
|
|
ODELETE,
|
|
OLEN,
|
|
OMAKE,
|
|
ONEW,
|
|
OPANIC,
|
|
ORECOVER,
|
|
OALIGNOF,
|
|
OOFFSETOF,
|
|
OSIZEOF,
|
|
OPRINT,
|
|
OPRINTN:
|
|
if n.Left != nil {
|
|
fmt.Fprintf(s, "%#v(%v)", n.Op, n.Left)
|
|
return
|
|
}
|
|
if n.Isddd {
|
|
fmt.Fprintf(s, "%#v(%.v...)", n.Op, n.List)
|
|
return
|
|
}
|
|
fmt.Fprintf(s, "%#v(%.v)", n.Op, n.List)
|
|
|
|
case OCALL, OCALLFUNC, OCALLINTER, OCALLMETH, OGETG:
|
|
n.Left.exprfmt(s, nprec)
|
|
if n.Isddd {
|
|
fmt.Fprintf(s, "(%.v...)", n.List)
|
|
return
|
|
}
|
|
fmt.Fprintf(s, "(%.v)", n.List)
|
|
|
|
case OMAKEMAP, OMAKECHAN, OMAKESLICE:
|
|
if n.List.Len() != 0 { // pre-typecheck
|
|
fmt.Fprintf(s, "make(%v, %.v)", n.Type, n.List)
|
|
return
|
|
}
|
|
if n.Right != nil {
|
|
fmt.Fprintf(s, "make(%v, %v, %v)", n.Type, n.Left, n.Right)
|
|
return
|
|
}
|
|
if n.Left != nil && (n.Op == OMAKESLICE || !n.Left.Type.IsUntyped()) {
|
|
fmt.Fprintf(s, "make(%v, %v)", n.Type, n.Left)
|
|
return
|
|
}
|
|
fmt.Fprintf(s, "make(%v)", n.Type)
|
|
|
|
// Unary
|
|
case OPLUS,
|
|
OMINUS,
|
|
OADDR,
|
|
OCOM,
|
|
OIND,
|
|
ONOT,
|
|
ORECV:
|
|
fmt.Fprint(s, n.Op.GoString()) // %#v
|
|
if n.Left.Op == n.Op {
|
|
fmt.Fprint(s, " ")
|
|
}
|
|
n.Left.exprfmt(s, nprec+1)
|
|
|
|
// 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)
|
|
fmt.Fprintf(s, " %#v ", n.Op)
|
|
n.Right.exprfmt(s, nprec+1)
|
|
|
|
case OADDSTR:
|
|
i := 0
|
|
for _, n1 := range n.List.Slice() {
|
|
if i != 0 {
|
|
fmt.Fprint(s, " + ")
|
|
}
|
|
n1.exprfmt(s, nprec)
|
|
i++
|
|
}
|
|
|
|
case OCMPSTR, OCMPIFACE:
|
|
n.Left.exprfmt(s, nprec)
|
|
// TODO(marvin): Fix Node.EType type union.
|
|
fmt.Fprintf(s, " %#v ", Op(n.Etype))
|
|
n.Right.exprfmt(s, nprec+1)
|
|
|
|
default:
|
|
fmt.Fprintf(s, "<node %v>", n.Op)
|
|
}
|
|
}
|
|
|
|
func (n *Node) nodefmt(s fmt.State, flag FmtFlag) {
|
|
t := n.Type
|
|
|
|
// we almost always want the original, except in export mode for literals
|
|
// this saves the importer some work, and avoids us having to redo some
|
|
// special casing for package unsafe
|
|
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 {
|
|
fmt.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)
|
|
return
|
|
}
|
|
|
|
n.exprfmt(s, 0)
|
|
}
|
|
|
|
func (n *Node) nodedump(s fmt.State, flag FmtFlag) {
|
|
if n == nil {
|
|
return
|
|
}
|
|
|
|
recur := flag&FmtShort == 0
|
|
|
|
if recur {
|
|
indent(s)
|
|
if dumpdepth > 10 {
|
|
fmt.Fprint(s, "...")
|
|
return
|
|
}
|
|
|
|
if n.Ninit.Len() != 0 {
|
|
fmt.Fprintf(s, "%v-init%v", n.Op, n.Ninit)
|
|
indent(s)
|
|
}
|
|
}
|
|
|
|
switch n.Op {
|
|
default:
|
|
fmt.Fprintf(s, "%v%j", n.Op, n)
|
|
|
|
case OREGISTER, OINDREG:
|
|
fmt.Fprintf(s, "%v-%v%j", n.Op, obj.Rconv(int(n.Reg)), n)
|
|
|
|
case OLITERAL:
|
|
fmt.Fprintf(s, "%v-%v%j", n.Op, n.Val(), n)
|
|
|
|
case ONAME, ONONAME:
|
|
if n.Sym != nil {
|
|
fmt.Fprintf(s, "%v-%v%j", n.Op, n.Sym, n)
|
|
} else {
|
|
fmt.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)
|
|
fmt.Fprintf(s, "%v-ntype%v", n.Op, n.Name.Param.Ntype)
|
|
}
|
|
|
|
case OASOP:
|
|
fmt.Fprintf(s, "%v-%v%j", n.Op, Op(n.Etype), n)
|
|
|
|
case OTYPE:
|
|
fmt.Fprintf(s, "%v %v%j type=%v", n.Op, n.Sym, n, n.Type)
|
|
if recur && n.Type == nil && n.Name.Param.Ntype != nil {
|
|
indent(s)
|
|
fmt.Fprintf(s, "%v-ntype%v", n.Op, n.Name.Param.Ntype)
|
|
}
|
|
}
|
|
|
|
if n.Sym != nil && n.Op != ONAME {
|
|
fmt.Fprintf(s, " %v", n.Sym)
|
|
}
|
|
|
|
if n.Type != nil {
|
|
fmt.Fprintf(s, " %v", n.Type)
|
|
}
|
|
|
|
if recur {
|
|
if n.Left != nil {
|
|
fmt.Fprintf(s, "%v", n.Left)
|
|
}
|
|
if n.Right != nil {
|
|
fmt.Fprintf(s, "%v", n.Right)
|
|
}
|
|
if n.List.Len() != 0 {
|
|
indent(s)
|
|
fmt.Fprintf(s, "%v-list%v", n.Op, n.List)
|
|
}
|
|
|
|
if n.Rlist.Len() != 0 {
|
|
indent(s)
|
|
fmt.Fprintf(s, "%v-rlist%v", n.Op, n.Rlist)
|
|
}
|
|
|
|
if n.Nbody.Len() != 0 {
|
|
indent(s)
|
|
fmt.Fprintf(s, "%v-body%v", n.Op, n.Nbody)
|
|
}
|
|
}
|
|
}
|
|
|
|
// "%S" suppresses qualifying with package
|
|
func (s *Sym) Format(f fmt.State, verb rune) {
|
|
switch verb {
|
|
case 'v', 'S':
|
|
fmt.Fprint(f, s.sconv(fmtFlag(f, verb)))
|
|
|
|
default:
|
|
fmt.Fprintf(f, "%%!%c(*Sym=%p)", verb, s)
|
|
}
|
|
}
|
|
|
|
func (s *Sym) String() string {
|
|
return s.sconv(0)
|
|
}
|
|
|
|
// See #16897 before changing the implementation of sconv.
|
|
func (s *Sym) sconv(flag FmtFlag) string {
|
|
if flag&FmtLong != 0 {
|
|
panic("linksymfmt")
|
|
}
|
|
|
|
if s == nil {
|
|
return "<S>"
|
|
}
|
|
|
|
if s.Name == "_" {
|
|
return "_"
|
|
}
|
|
|
|
sf := flag
|
|
sm := setfmode(&flag)
|
|
str := s.symfmt(flag)
|
|
flag = sf
|
|
fmtmode = sm
|
|
return str
|
|
}
|
|
|
|
func (t *Type) String() string {
|
|
return t.tconv(0)
|
|
}
|
|
|
|
func fldconv(f *Field, flag FmtFlag) string {
|
|
if f == nil {
|
|
return "<T>"
|
|
}
|
|
|
|
sf := flag
|
|
sm := setfmode(&flag)
|
|
|
|
if fmtmode == FTypeId && (sf&FmtUnsigned != 0) {
|
|
fmtpkgpfx++
|
|
}
|
|
if fmtpkgpfx != 0 {
|
|
flag |= FmtUnsigned
|
|
}
|
|
|
|
var name string
|
|
if flag&FmtShort == 0 {
|
|
s := f.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 && f.Nname != nil {
|
|
if f.Nname.Orig != nil {
|
|
s = f.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 && f.Embedded == 0 {
|
|
if f.Funarg != FunargNone {
|
|
name = f.Nname.String()
|
|
} else if flag&FmtLong != 0 {
|
|
name = fmt.Sprintf("%0S", s)
|
|
if !exportname(name) && flag&FmtUnsigned == 0 {
|
|
name = s.String() // qualify non-exported names (used on structs, not on funarg)
|
|
}
|
|
} else {
|
|
name = s.String()
|
|
}
|
|
}
|
|
}
|
|
|
|
var typ string
|
|
if f.Isddd {
|
|
typ = fmt.Sprintf("...%v", f.Type.Elem())
|
|
} else {
|
|
typ = fmt.Sprintf("%v", f.Type)
|
|
}
|
|
|
|
str := typ
|
|
if name != "" {
|
|
str = name + " " + typ
|
|
}
|
|
|
|
if flag&FmtShort == 0 && f.Funarg == FunargNone && f.Note != "" {
|
|
str += " " + strconv.Quote(f.Note)
|
|
}
|
|
|
|
if fmtmode == FTypeId && (sf&FmtUnsigned != 0) {
|
|
fmtpkgpfx--
|
|
}
|
|
|
|
flag = sf
|
|
fmtmode = sm
|
|
return str
|
|
}
|
|
|
|
// "%L" print definition, not name
|
|
// "%S" omit 'func' and receiver from function types, short type names
|
|
// "% v" package name, not prefix (FTypeId mode, sticky)
|
|
func (t *Type) Format(s fmt.State, verb rune) {
|
|
switch verb {
|
|
case 'v', 'S', 'L':
|
|
fmt.Fprint(s, t.tconv(fmtFlag(s, verb)))
|
|
|
|
default:
|
|
fmt.Fprintf(s, "%%!%c(*Type=%p)", verb, t)
|
|
}
|
|
}
|
|
|
|
// See #16897 before changing the implementation of tconv.
|
|
func (t *Type) tconv(flag FmtFlag) string {
|
|
if t == nil {
|
|
return "<T>"
|
|
}
|
|
|
|
if t.Trecur > 4 {
|
|
return "<...>"
|
|
}
|
|
|
|
t.Trecur++
|
|
sf := flag
|
|
sm := setfmode(&flag)
|
|
|
|
if fmtmode == FTypeId && (sf&FmtUnsigned != 0) {
|
|
fmtpkgpfx++
|
|
}
|
|
if fmtpkgpfx != 0 {
|
|
flag |= FmtUnsigned
|
|
}
|
|
|
|
str := t.typefmt(flag)
|
|
|
|
if fmtmode == FTypeId && (sf&FmtUnsigned != 0) {
|
|
fmtpkgpfx--
|
|
}
|
|
|
|
flag = sf
|
|
fmtmode = sm
|
|
t.Trecur--
|
|
return str
|
|
}
|
|
|
|
func (n *Node) String() string {
|
|
return fmt.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) {
|
|
if n == nil {
|
|
fmt.Fprint(s, "<N>")
|
|
return
|
|
}
|
|
|
|
sf := flag
|
|
sm := setfmode(&flag)
|
|
|
|
switch fmtmode {
|
|
case FErr:
|
|
n.nodefmt(s, flag)
|
|
|
|
case FDbg:
|
|
dumpdepth++
|
|
n.nodedump(s, flag)
|
|
dumpdepth--
|
|
|
|
default:
|
|
Fatalf("unhandled %%N mode: %d", fmtmode)
|
|
}
|
|
|
|
flag = sf
|
|
fmtmode = sm
|
|
}
|
|
|
|
func (l Nodes) Format(s fmt.State, verb rune) {
|
|
switch verb {
|
|
case 'v':
|
|
l.hconv(s, fmtFlag(s, verb))
|
|
|
|
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) {
|
|
if l.Len() == 0 && fmtmode == FDbg {
|
|
fmt.Fprint(s, "<nil>")
|
|
return
|
|
}
|
|
|
|
sf := flag
|
|
sm := setfmode(&flag)
|
|
sep := "; "
|
|
if fmtmode == FDbg {
|
|
sep = "\n"
|
|
} else if flag&FmtComma != 0 {
|
|
sep = ", "
|
|
}
|
|
|
|
for i, n := range l.Slice() {
|
|
fmt.Fprint(s, n)
|
|
if i+1 < l.Len() {
|
|
fmt.Fprint(s, sep)
|
|
}
|
|
}
|
|
|
|
flag = sf
|
|
fmtmode = sm
|
|
}
|
|
|
|
func dumplist(s string, l Nodes) {
|
|
fmt.Printf("%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, ". ")
|
|
}
|
|
}
|