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Add banned characters rule (#532) (#591)

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doniacld 2021-10-14 20:56:29 +02:00 committed by GitHub
parent 71b31e26ab
commit be81121399
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13 changed files with 135 additions and 59 deletions

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@ -464,14 +464,15 @@ List of all available rules. The rules ported from `golint` are left unchanged a
| [`function-length`](./RULES_DESCRIPTIONS.md#function-length) | n/a | Warns on functions exceeding the statements or lines max | no | no |
| [`nested-structs`](./RULES_DESCRIPTIONS.md#nested-structs) | n/a | Warns on structs within structs | no | no |
| [`useless-break`](./RULES_DESCRIPTIONS.md#useless-break) | n/a | Warns on useless `break` statements in case clauses | no | no |
| [`banned-characters`](./RULES_DESCRIPTIONS.md#banned-characters) | n/a | Checks banned characters in identifiers | no | no |
## Configurable rules
Here you can find how you can configure some of the existing rules:
Here you can find how you can configure some existing rules:
### `var-naming`
This rule accepts two slices of strings, a whitelist and a blacklist of initialisms. By default the rule behaves exactly as the alternative in `golint` but optionally, you can relax it (see [golint/lint/issues/89](https://github.com/golang/lint/issues/89))
This rule accepts two slices of strings, a whitelist and a blacklist of initialisms. By default, the rule behaves exactly as the alternative in `golint` but optionally, you can relax it (see [golint/lint/issues/89](https://github.com/golang/lint/issues/89))
```toml
[rule.var-naming]

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@ -8,6 +8,7 @@ List of all available rules.
- [argument-limit](#argument-limit)
- [atomic](#atomic)
- [bare-return](#bare-return)
- [banned-characters](#banned-characters)
- [blank-imports](#blank-imports)
- [bool-literal-in-expr](#bool-literal-in-expr)
- [call-to-gc](#call-to-gc)
@ -115,6 +116,19 @@ _Description_: Warns on bare (a.k.a. naked) returns
_Configuration_: N/A
## banned-characters
_Description_: Checks given banned characters in identifiers(func, var, const). Comments are not checked.
_Configuration_: This rule accepts a slice of strings, the characters to ban.
Example:
```toml
[rule.banned-characters]
arguments =["Ω","Σ","σ"]
```
## blank-imports
_Description_: Blank import should be only in a main or test package, or have a comment justifying it.

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@ -82,6 +82,7 @@ var allRules = append([]lint.Rule{
&rule.IfReturnRule{},
&rule.UselessBreak{},
&rule.TimeEqualRule{},
&rule.BannedCharsRule{},
}, defaultRules...)
var allFormatters = []lint.Formatter{
@ -111,7 +112,7 @@ func GetLintingRules(config *lint.Config) ([]lint.Rule, error) {
rulesMap[r.Name()] = r
}
lintingRules := []lint.Rule{}
var lintingRules []lint.Rule
for name, ruleConfig := range config.Rules {
rule, ok := rulesMap[name]
if !ok {

46
go.sum
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@ -1,35 +1,20 @@
github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/BurntSushi/toml v0.4.1 h1:GaI7EiDXDRfa8VshkTj7Fym7ha+y8/XxIgD2okUIjLw=
github.com/BurntSushi/toml v0.4.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
github.com/chavacava/garif v0.0.0-20210405163807-87a70f3d418b h1:StHNkfM8nXnNQnk5/0uYYhIqvvENd14hoHPnZsakTNo=
github.com/chavacava/garif v0.0.0-20210405163807-87a70f3d418b/go.mod h1:Qjyv4H3//PWVzTeCezG2b9IRn6myJxJSr4TD/xo6ojU=
github.com/chavacava/garif v0.0.0-20210405164556-e8a0a408d6af h1:spmv8nSH9h5oCQf40jt/ufBCt9j0/58u4G+rkeMqXGI=
github.com/chavacava/garif v0.0.0-20210405164556-e8a0a408d6af/go.mod h1:Qjyv4H3//PWVzTeCezG2b9IRn6myJxJSr4TD/xo6ojU=
github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/fatih/color v1.10.0 h1:s36xzo75JdqLaaWoiEHk767eHiwo0598uUxyfiPkDsg=
github.com/fatih/color v1.10.0/go.mod h1:ELkj/draVOlAH/xkhN6mQ50Qd0MPOk5AAr3maGEBuJM=
github.com/fatih/color v1.11.0 h1:l4iX0RqNnx/pU7rY2DB/I+znuYY0K3x6Ywac6EIr0PA=
github.com/fatih/color v1.11.0/go.mod h1:ELkj/draVOlAH/xkhN6mQ50Qd0MPOk5AAr3maGEBuJM=
github.com/fatih/color v1.12.0 h1:mRhaKNwANqRgUBGKmnI5ZxEk7QXmjQeCcuYFMX2bfcc=
github.com/fatih/color v1.12.0/go.mod h1:ELkj/draVOlAH/xkhN6mQ50Qd0MPOk5AAr3maGEBuJM=
github.com/fatih/color v1.13.0 h1:8LOYc1KYPPmyKMuN8QV2DNRWNbLo6LZ0iLs8+mlH53w=
github.com/fatih/color v1.13.0/go.mod h1:kLAiJbzzSOZDVNGyDpeOxJ47H46qBXwg5ILebYFFOfk=
github.com/fatih/structtag v1.2.0 h1:/OdNE99OxoI/PqaW/SuSK9uxxT3f/tcSZgon/ssNSx4=
github.com/fatih/structtag v1.2.0/go.mod h1:mBJUNpUnHmRKrKlQQlmCrh5PuhftFbNv8Ys4/aAZl94=
github.com/mattn/go-colorable v0.1.8 h1:c1ghPdyEDarC70ftn0y+A/Ee++9zz8ljHG1b13eJ0s8=
github.com/mattn/go-colorable v0.1.8/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
github.com/mattn/go-colorable v0.1.9 h1:sqDoxXbdeALODt0DAeJCVp38ps9ZogZEAXjus69YV3U=
github.com/mattn/go-colorable v0.1.9/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y=
github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
github.com/mattn/go-runewidth v0.0.9 h1:Lm995f3rfxdpd6TSmuVCHVb/QhupuXlYr8sCI/QdE+0=
github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
github.com/mgechev/dots v0.0.0-20190921121421-c36f7dcfbb81 h1:QASJXOGm2RZ5Ardbc86qNFvby9AqkLDibfChMtAg5QM=
github.com/mgechev/dots v0.0.0-20190921121421-c36f7dcfbb81/go.mod h1:KQ7+USdGKfpPjXk4Ga+5XxQM4Lm4e3gAogrreFAYpOg=
github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517 h1:zpIH83+oKzcpryru8ceC6BxnoG8TBrhgAvRg8obzup0=
github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517/go.mod h1:KQ7+USdGKfpPjXk4Ga+5XxQM4Lm4e3gAogrreFAYpOg=
github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
@ -43,59 +28,30 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
github.com/yuin/goldmark v1.4.0/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/mod v0.3.0 h1:RM4zey1++hCTbCVQfnWeKs9/IEsaBLA8vTkd0WVtmH4=
golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.4.2 h1:Gz96sIWK3OalVv/I/qNygP42zyoKp3xptRVCWRFEBvo=
golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4 h1:myAQVi0cGEoqQVR5POX+8RR2mrocKqNN1hmeMqhX27k=
golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210510120138-977fb7262007 h1:gG67DSER+11cZvqIMb8S8bt0vZtiN6xWYARwirrOSfE=
golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c h1:F1jZWGFhYfh0Ci55sIpILtKKK8p3i2/krTr0H1rg74I=
golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e h1:WUoyKPm6nCo1BnNUvPGnFG3T5DUVem42yDJZZ4CNxMA=
golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.1.0 h1:po9/4sTYwZU9lPhi1tOrb4hCv3qrhiQ77LZfGa2OjwY=
golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0=
golang.org/x/tools v0.1.1 h1:wGiQel/hW0NnEkJUk8lbzkX2gFJU6PFxf1v5OlCfuOs=
golang.org/x/tools v0.1.1/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
golang.org/x/tools v0.1.2 h1:kRBLX7v7Af8W7Gdbbc908OJcdgtK8bOz9Uaj8/F1ACA=
golang.org/x/tools v0.1.2/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
golang.org/x/tools v0.1.3 h1:L69ShwSZEyCsLKoAxDKeMvLDZkumEe8gXUZAjab0tX8=
golang.org/x/tools v0.1.3/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
golang.org/x/tools v0.1.4 h1:cVngSRcfgyZCzys3KYOpCFa+4dqX/Oub9tAq00ttGVs=
golang.org/x/tools v0.1.4/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
golang.org/x/tools v0.1.5 h1:ouewzE6p+/VEB31YYnTbEJdi8pFqKp4P4n85vwo3DHA=
golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
golang.org/x/tools v0.1.6 h1:SIasE1FVIQOWz2GEAHFOmoW7xchJcqlucjSULTL0Ag4=
golang.org/x/tools v0.1.6/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
golang.org/x/tools v0.1.7 h1:6j8CgantCy3yc8JGBqkDLMKWqZ0RDU2g1HVgacojGWQ=
golang.org/x/tools v0.1.7/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

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@ -11,7 +11,7 @@ type DisabledInterval struct {
RuleName string
}
// Rule defines an abstract rule interaface
// Rule defines an abstract rule interface
type Rule interface {
Name() string
Apply(*File, Arguments) []Failure

78
rule/banned-characters.go Normal file
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@ -0,0 +1,78 @@
package rule
import (
"fmt"
"go/ast"
"strings"
"github.com/mgechev/revive/lint"
)
// BannedCharsRule checks if a file contains banned characters.
type BannedCharsRule struct{}
const bannedCharsRuleName = "banned-characters"
// Apply applied the rule to the given file.
func (r *BannedCharsRule) Apply(file *lint.File, arguments lint.Arguments) []lint.Failure {
var failures []lint.Failure
checkNumberOfArguments(1, arguments, bannedCharsRuleName)
bannedCharList := r.getBannedCharsList(arguments)
onFailure := func(failure lint.Failure) {
failures = append(failures, failure)
}
w := lintBannedCharsRule{
bannedChars: bannedCharList,
onFailure: onFailure,
}
ast.Walk(w, file.AST)
return failures
}
// Name returns the rule name
func (r *BannedCharsRule) Name() string {
return bannedCharsRuleName
}
// getBannedCharsList converts arguments into the banned characters list
func (r *BannedCharsRule) getBannedCharsList(args lint.Arguments) []string {
var bannedChars []string
for _, char := range args {
charStr, ok := char.(string)
if !ok {
panic(fmt.Sprintf("Invalid argument for the %s rule: expecting a string, got %T", r.Name(), char))
}
bannedChars = append(bannedChars, charStr)
}
return bannedChars
}
type lintBannedCharsRule struct {
bannedChars []string
onFailure func(lint.Failure)
}
// Visit checks for each node if an identifier contains banned characters
func (w lintBannedCharsRule) Visit(node ast.Node) ast.Visitor {
n, ok := node.(*ast.Ident)
if !ok {
return w
}
for _, c := range w.bannedChars {
ok := strings.Contains(n.Name, c)
if ok {
w.onFailure(lint.Failure{
Confidence: 1,
Failure: fmt.Sprintf("banned character found: %s", c),
RuleName: bannedCharsRuleName,
Node: n,
})
}
}
return w
}

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@ -61,7 +61,7 @@ func (w bareReturnFinder) Visit(node ast.Node) ast.Visitor {
_, ok := node.(*ast.FuncLit)
if ok {
// skip analysing function literals
// they will analyzed by the lintBareReturnRule.Visit method
// they will be analysed by the lintBareReturnRule.Visit method
return nil
}

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@ -54,7 +54,7 @@ func (w *lintStringInt) Visit(node ast.Node) ast.Visitor {
w.onFailure(lint.Failure{
Confidence: 1,
Node: ce,
Failure: "dubious convertion of an integer into a string, use strconv.Itoa",
Failure: "dubious conversion of an integer into a string, use strconv.Itoa",
})
return w

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@ -184,7 +184,7 @@ func (w *lintNames) Visit(n ast.Node) ast.Visitor {
}
case *ast.InterfaceType:
// Do not check interface method names.
// They are often constrainted by the method names of concrete types.
// They are often constrained by the method names of concrete types.
for _, x := range v.Methods.List {
ft, ok := x.Type.(*ast.FuncType)
if !ok { // might be an embedded interface name

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@ -0,0 +1,17 @@
package test
import (
"testing"
"github.com/mgechev/revive/lint"
"github.com/mgechev/revive/rule"
)
// Test banned characters in a const, var and func names.
// One banned character is in the comment and should not be checked.
// One banned character from the list is not present in the fixture file.
func TestBannedCharacters(t *testing.T) {
testRule(t, "banned-characters", &rule.BannedCharsRule{}, &lint.RuleConfig{
Arguments: []interface{}{"Ω", "Σ", "σ", "1"},
})
}

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@ -125,7 +125,7 @@ func assertFailures(t *testing.T, baseDir string, fi os.FileInfo, src []byte, ru
type instruction struct {
Line int // the line number this applies to
Match string // what pattern to match
Match string // which pattern to match
Replacement string // what the suggested replacement line should be
}

9
testdata/banned-characters.go vendored Normal file
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@ -0,0 +1,9 @@
package fixtures
const Ω = "Omega" // MATCH:3 /banned character found: Ω/
// func contains banned characters Ω // authorized banned chars in comment
func funcΣ() error { // MATCH:6 /banned character found: Σ/
var charσhid string // MATCH:7 /banned character found: σ/
return nil
}

View File

@ -19,12 +19,12 @@ func StringTest() {
o struct{ x int }
)
const p = 0
_ = string(i) // MATCH /dubious convertion of an integer into a string, use strconv.Itoa/
_ = string(i) // MATCH /dubious conversion of an integer into a string, use strconv.Itoa/
_ = string(j)
_ = string(k)
_ = string(p) // MATCH /dubious convertion of an integer into a string, use strconv.Itoa/
_ = A(l) // MATCH /dubious convertion of an integer into a string, use strconv.Itoa/
_ = B(m) // MATCH /dubious convertion of an integer into a string, use strconv.Itoa/
_ = string(n[1]) // MATCH /dubious convertion of an integer into a string, use strconv.Itoa/
_ = string(o.x) // MATCH /dubious convertion of an integer into a string, use strconv.Itoa/
_ = string(p) // MATCH /dubious conversion of an integer into a string, use strconv.Itoa/
_ = A(l) // MATCH /dubious conversion of an integer into a string, use strconv.Itoa/
_ = B(m) // MATCH /dubious conversion of an integer into a string, use strconv.Itoa/
_ = string(n[1]) // MATCH /dubious conversion of an integer into a string, use strconv.Itoa/
_ = string(o.x) // MATCH /dubious conversion of an integer into a string, use strconv.Itoa/
}