Gecko [ 167.86.127.34 ]

Name	Size	Permission
builtin	[ DIR ]	drwxr-xr-x
testdata	[ DIR ]	drwxr-xr-x
alg.go	16.28 KB	-rw-r--r--
align.go	9.85 KB	-rw-r--r--
bexport.go	4.41 KB	-rw-r--r--
bimport.go	667 B	-rw-r--r--
bitset.go	1.15 KB	-rw-r--r--
bootstrap.go	311 B	-rw-r--r--
builtin.go	16.41 KB	-rw-r--r--
builtin_test.go	622 B	-rw-r--r--
bv.go	5.5 KB	-rw-r--r--
class_string.go	712 B	-rw-r--r--
closure.go	15.57 KB	-rw-r--r--
const.go	27.21 KB	-rw-r--r--
constFold_test.go	322.99 KB	-rw-r--r--
dcl.go	28.37 KB	-rw-r--r--
dep_test.go	587 B	-rw-r--r--
dump.go	6.37 KB	-rw-r--r--
dwinl.go	10.07 KB	-rw-r--r--
esc.go	12.22 KB	-rw-r--r--
escape.go	37.37 KB	-rw-r--r--
export.go	5.33 KB	-rw-r--r--
fixedbugs_test.go	2.23 KB	-rw-r--r--
float_test.go	11.51 KB	-rw-r--r--
fmt.go	41.71 KB	-rw-r--r--
gen.go	2.33 KB	-rw-r--r--
global_test.go	2.57 KB	-rw-r--r--
go.go	7.4 KB	-rw-r--r--
gsubr.go	9.08 KB	-rw-r--r--
iexport.go	31.65 KB	-rw-r--r--
iface_test.go	1.92 KB	-rw-r--r--
iimport.go	22.79 KB	-rw-r--r--
init.go	3.29 KB	-rw-r--r--
initorder.go	9.84 KB	-rw-r--r--
inl.go	35.08 KB	-rw-r--r--
inl_test.go	6.64 KB	-rw-r--r--
lang_test.go	1.46 KB	-rw-r--r--
lex.go	5.96 KB	-rw-r--r--
lex_test.go	3.63 KB	-rw-r--r--
logic_test.go	11.08 KB	-rw-r--r--
main.go	43.75 KB	-rw-r--r--
mapfile_mmap.go	1.21 KB	-rw-r--r--
mapfile_read.go	485 B	-rw-r--r--
mkbuiltin.go	5.34 KB	-rw-r--r--
mpfloat.go	6.56 KB	-rw-r--r--
mpint.go	5.34 KB	-rw-r--r--
noder.go	37.65 KB	-rw-r--r--
obj.go	11.44 KB	-rw-r--r--
op_string.go	4.88 KB	-rw-r--r--
order.go	37.39 KB	-rw-r--r--
pgen.go	21.66 KB	-rw-r--r--
pgen_test.go	6.01 KB	-rw-r--r--
phi.go	14.72 KB	-rw-r--r--
plive.go	44.51 KB	-rw-r--r--
pprof.go	274 B	-rw-r--r--
racewalk.go	2.61 KB	-rw-r--r--
range.go	13.72 KB	-rw-r--r--
reflect.go	48.07 KB	-rw-r--r--
reproduciblebuilds_test.go	1.46 KB	-rw-r--r--
scc.go	4.18 KB	-rw-r--r--
scope.go	2.8 KB	-rw-r--r--
scope_test.go	13.67 KB	-rw-r--r--
select.go	9.16 KB	-rw-r--r--
shift_test.go	21.46 KB	-rw-r--r--
sinit.go	26.75 KB	-rw-r--r--
sizeof_test.go	844 B	-rw-r--r--
ssa.go	224.4 KB	-rw-r--r--
ssa_test.go	5.1 KB	-rw-r--r--
subr.go	43.73 KB	-rw-r--r--
swt.go	18.51 KB	-rw-r--r--
syntax.go	36.41 KB	-rw-r--r--
timings.go	5.75 KB	-rw-r--r--
trace.go	494 B	-rw-r--r--
truncconst_test.go	1.76 KB	-rw-r--r--
typecheck.go	87.11 KB	-rw-r--r--
types.go	1.19 KB	-rw-r--r--
types_acc.go	491 B	-rw-r--r--
universe.go	10.88 KB	-rw-r--r--
unsafe.go	1.8 KB	-rw-r--r--
util.go	2.18 KB	-rw-r--r--
walk.go	101.89 KB	-rw-r--r--
zerorange_test.go	1.89 KB	-rw-r--r--

Code Editor : lex.go

// Copyright 2009 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 (
	"cmd/compile/internal/syntax"
	"cmd/internal/objabi"
	"cmd/internal/src"
	"fmt"
	"strings"
)

// lineno is the source position at the start of the most recently lexed token.
// TODO(gri) rename and eventually remove
var lineno src.XPos

func makePos(base *src.PosBase, line, col uint) src.XPos {
	return Ctxt.PosTable.XPos(src.MakePos(base, line, col))
}

func isSpace(c rune) bool {
	return c == ' ' || c == '\t' || c == '\n' || c == '\r'
}

func isQuoted(s string) bool {
	return len(s) >= 2 && s[0] == '"' && s[len(s)-1] == '"'
}

const (
	// Func pragmas.
	Nointerface    syntax.Pragma = 1 << iota
	Noescape                     // func parameters don't escape
	Norace                       // func must not have race detector annotations
	Nosplit                      // func should not execute on separate stack
	Noinline                     // func should not be inlined
	NoCheckPtr                   // func should not be instrumented by checkptr
	CgoUnsafeArgs                // treat a pointer to one arg as a pointer to them all
	UintptrEscapes               // pointers converted to uintptr escape

// Runtime-only func pragmas.
	// See ../../../../runtime/README.md for detailed descriptions.
	Systemstack        // func must run on system stack
	Nowritebarrier     // emit compiler error instead of write barrier
	Nowritebarrierrec  // error on write barrier in this or recursive callees
	Yeswritebarrierrec // cancels Nowritebarrierrec in this function and callees

// Runtime-only type pragmas
	NotInHeap // values of this type must not be heap allocated
)

func pragmaValue(verb string) syntax.Pragma {
	switch verb {
	case "go:nointerface":
		if objabi.Fieldtrack_enabled != 0 {
			return Nointerface
		}
	case "go:noescape":
		return Noescape
	case "go:norace":
		return Norace
	case "go:nosplit":
		return Nosplit | NoCheckPtr // implies NoCheckPtr (see #34972)
	case "go:noinline":
		return Noinline
	case "go:nocheckptr":
		return NoCheckPtr
	case "go:systemstack":
		return Systemstack
	case "go:nowritebarrier":
		return Nowritebarrier
	case "go:nowritebarrierrec":
		return Nowritebarrierrec | Nowritebarrier // implies Nowritebarrier
	case "go:yeswritebarrierrec":
		return Yeswritebarrierrec
	case "go:cgo_unsafe_args":
		return CgoUnsafeArgs | NoCheckPtr // implies NoCheckPtr (see #34968)
	case "go:uintptrescapes":
		// For the next function declared in the file
		// any uintptr arguments may be pointer values
		// converted to uintptr. This directive
		// ensures that the referenced allocated
		// object, if any, is retained and not moved
		// until the call completes, even though from
		// the types alone it would appear that the
		// object is no longer needed during the
		// call. The conversion to uintptr must appear
		// in the argument list.
		// Used in syscall/dll_windows.go.
		return UintptrEscapes
	case "go:notinheap":
		return NotInHeap
	}
	return 0
}

// pragcgo is called concurrently if files are parsed concurrently.
func (p *noder) pragcgo(pos syntax.Pos, text string) {
	f := pragmaFields(text)

verb := strings.TrimPrefix(f[0], "go:")
	f[0] = verb

switch verb {
	case "cgo_export_static", "cgo_export_dynamic":
		switch {
		case len(f) == 2 && !isQuoted(f[1]):
		case len(f) == 3 && !isQuoted(f[1]) && !isQuoted(f[2]):
		default:
			p.error(syntax.Error{Pos: pos, Msg: fmt.Sprintf(`usage: //go:%s local [remote]`, verb)})
			return
		}
	case "cgo_import_dynamic":
		switch {
		case len(f) == 2 && !isQuoted(f[1]):
		case len(f) == 3 && !isQuoted(f[1]) && !isQuoted(f[2]):
		case len(f) == 4 && !isQuoted(f[1]) && !isQuoted(f[2]) && isQuoted(f[3]):
			f[3] = strings.Trim(f[3], `"`)
			if objabi.GOOS == "aix" && f[3] != "" {
				// On Aix, library pattern must be "lib.a/object.o"
				// or "lib.a/libname.so.X"
				n := strings.Split(f[3], "/")
				if len(n) != 2 || !strings.HasSuffix(n[0], ".a") || (!strings.HasSuffix(n[1], ".o") && !strings.Contains(n[1], ".so.")) {
					p.error(syntax.Error{Pos: pos, Msg: `usage: //go:cgo_import_dynamic local [remote ["lib.a/object.o"]]`})
					return
				}
			}
		default:
			p.error(syntax.Error{Pos: pos, Msg: `usage: //go:cgo_import_dynamic local [remote ["library"]]`})
			return
		}
	case "cgo_import_static":
		switch {
		case len(f) == 2 && !isQuoted(f[1]):
		default:
			p.error(syntax.Error{Pos: pos, Msg: `usage: //go:cgo_import_static local`})
			return
		}
	case "cgo_dynamic_linker":
		switch {
		case len(f) == 2 && isQuoted(f[1]):
			f[1] = strings.Trim(f[1], `"`)
		default:
			p.error(syntax.Error{Pos: pos, Msg: `usage: //go:cgo_dynamic_linker "path"`})
			return
		}
	case "cgo_ldflag":
		switch {
		case len(f) == 2 && isQuoted(f[1]):
			f[1] = strings.Trim(f[1], `"`)
		default:
			p.error(syntax.Error{Pos: pos, Msg: `usage: //go:cgo_ldflag "arg"`})
			return
		}
	default:
		return
	}
	p.pragcgobuf = append(p.pragcgobuf, f)
}

// pragmaFields is similar to strings.FieldsFunc(s, isSpace)
// but does not split when inside double quoted regions and always
// splits before the start and after the end of a double quoted region.
// pragmaFields does not recognize escaped quotes. If a quote in s is not
// closed the part after the opening quote will not be returned as a field.
func pragmaFields(s string) []string {
	var a []string
	inQuote := false
	fieldStart := -1 // Set to -1 when looking for start of field.
	for i, c := range s {
		switch {
		case c == '"':
			if inQuote {
				inQuote = false
				a = append(a, s[fieldStart:i+1])
				fieldStart = -1
			} else {
				inQuote = true
				if fieldStart >= 0 {
					a = append(a, s[fieldStart:i])
				}
				fieldStart = i
			}
		case !inQuote && isSpace(c):
			if fieldStart >= 0 {
				a = append(a, s[fieldStart:i])
				fieldStart = -1
			}
		default:
			if fieldStart == -1 {
				fieldStart = i
			}
		}
	}
	if !inQuote && fieldStart >= 0 { // Last field might end at the end of the string.
		a = append(a, s[fieldStart:])
	}
	return a
}

${this.title}

Code Editor : lex.go