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Current Path: /opt/golang/1.19.4/src/cmd/compile/internal/types2

opt / golang / 1.19.4 / src / cmd / compile / internal / types2 /

📁 ..
📄 api.go(17.37 KB)
📄 api_test.go(79.44 KB)
📄 array.go(803 B)
📄 assignments.go(13.89 KB)
📄 basic.go(1.48 KB)
📄 builtins.go(23.73 KB)
📄 builtins_test.go(9.89 KB)
📄 call.go(19.08 KB)
📄 chan.go(910 B)
📄 check.go(17.12 KB)
📄 check_test.go(8.96 KB)
📄 compilersupport.go(1.05 KB)
📄 context.go(4.34 KB)
📄 context_test.go(2.3 KB)
📄 conversions.go(8.27 KB)
📄 decl.go(27.86 KB)
📄 errorcalls_test.go(1.15 KB)
📄 errors.go(7.62 KB)
📄 errors_test.go(1.01 KB)
📄 example_test.go(7.41 KB)
📄 expr.go(54.01 KB)
📄 gccgosizes.go(1017 B)
📄 hilbert_test.go(3.63 KB)
📄 importer_test.go(913 B)
📄 index.go(11.13 KB)
📄 infer.go(24.86 KB)
📄 initorder.go(9.55 KB)
📄 instantiate.go(9.93 KB)
📄 instantiate_test.go(5.98 KB)
📄 interface.go(6.04 KB)
📄 issues_test.go(17.4 KB)
📄 labels.go(7.05 KB)
📄 lookup.go(17.01 KB)
📄 main_test.go(336 B)
📄 map.go(659 B)
📄 mono.go(9.03 KB)
📄 mono_test.go(2.65 KB)
📄 named.go(22.4 KB)
📄 named_test.go(2.35 KB)
📄 object.go(18.8 KB)
📄 object_test.go(5.13 KB)
📄 objset.go(928 B)
📄 operand.go(10.62 KB)
📄 package.go(2.67 KB)
📄 pointer.go(635 B)
📄 predicates.go(14.64 KB)
📄 resolver.go(24.88 KB)
📄 resolver_test.go(4.81 KB)
📄 return.go(4.34 KB)
📄 scope.go(9.38 KB)
📄 selection.go(3.99 KB)
📄 self_test.go(2.58 KB)
📄 signature.go(12.1 KB)
📄 sizeof_test.go(1.28 KB)
📄 sizes.go(7.56 KB)
📄 sizes_test.go(3.25 KB)
📄 slice.go(577 B)
📄 stdlib_test.go(8.8 KB)
📄 stmt.go(25.66 KB)
📄 struct.go(6.24 KB)
📄 subst.go(10.78 KB)
📄 termlist.go(3.68 KB)
📄 termlist_test.go(7.18 KB)
📁 testdata
📄 tuple.go(929 B)
📄 type.go(2.92 KB)
📄 typelists.go(1.84 KB)
📄 typeparam.go(4.75 KB)
📄 typeset.go(13.87 KB)
📄 typeset_test.go(2.41 KB)
📄 typestring.go(10.61 KB)
📄 typestring_test.go(4.11 KB)
📄 typeterm.go(3.52 KB)
📄 typeterm_test.go(5.08 KB)
📄 typexpr.go(14.8 KB)
📄 unify.go(18.34 KB)
📄 union.go(6.1 KB)
📄 universe.go(7.58 KB)
📄 validtype.go(7.77 KB)
📄 version.go(2.13 KB)

Editing: version.go

// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package types2

import (
	"cmd/compile/internal/syntax"
	"fmt"
	"regexp"
	"strconv"
	"strings"
)

// langCompat reports an error if the representation of a numeric
// literal is not compatible with the current language version.
func (check *Checker) langCompat(lit *syntax.BasicLit) {
	s := lit.Value
	if len(s) <= 2 || check.allowVersion(check.pkg, 1, 13) {
		return
	}
	// len(s) > 2
	if strings.Contains(s, "_") {
		check.versionErrorf(lit, "go1.13", "underscores in numeric literals")
		return
	}
	if s[0] != '0' {
		return
	}
	radix := s[1]
	if radix == 'b' || radix == 'B' {
		check.versionErrorf(lit, "go1.13", "binary literals")
		return
	}
	if radix == 'o' || radix == 'O' {
		check.versionErrorf(lit, "go1.13", "0o/0O-style octal literals")
		return
	}
	if lit.Kind != syntax.IntLit && (radix == 'x' || radix == 'X') {
		check.versionErrorf(lit, "go1.13", "hexadecimal floating-point literals")
	}
}

// allowVersion reports whether the given package
// is allowed to use version major.minor.
func (check *Checker) allowVersion(pkg *Package, major, minor int) bool {
	// We assume that imported packages have all been checked,
	// so we only have to check for the local package.
	if pkg != check.pkg {
		return true
	}
	ma, mi := check.version.major, check.version.minor
	return ma == 0 && mi == 0 || ma > major || ma == major && mi >= minor
}

type version struct {
	major, minor int
}

// parseGoVersion parses a Go version string (such as "go1.12")
// and returns the version, or an error. If s is the empty
// string, the version is 0.0.
func parseGoVersion(s string) (v version, err error) {
	if s == "" {
		return
	}
	matches := goVersionRx.FindStringSubmatch(s)
	if matches == nil {
		err = fmt.Errorf(`should be something like "go1.12"`)
		return
	}
	v.major, err = strconv.Atoi(matches[1])
	if err != nil {
		return
	}
	v.minor, err = strconv.Atoi(matches[2])
	return
}

// goVersionRx matches a Go version string, e.g. "go1.12".
var goVersionRx = regexp.MustCompile(`^go([1-9][0-9]*)\.(0|[1-9][0-9]*)$`)

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Editing: version.go

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