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value.go
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value.go
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// Copyright (c) 2022 The Go-Enjin Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package pageql
import "fmt"
type Value struct {
ContextKey *string `parser:" ( '.' @Ident )" json:"context-key,omitempty"`
Regexp *string `parser:"| ( 'm' @Regexp )" json:"regexp,omitempty"`
String *string `parser:"| ( @String )" json:"string,omitempty"`
Int *int `parser:"| ( @Int )" json:"int,omitempty"`
Float *float64 `parser:"| ( @Float )" json:"float,omitempty"`
Bool *Boolean `parser:"| @( 'true' | 'false' )" json:"bool,omitempty"`
Nil *Nil `parser:"| @( 'nil' )" json:"nil,omitempty"`
}
func (v *Value) Render() (clone *Value) {
clone = new(Value)
if v.ContextKey != nil {
key := *v.ContextKey
clone.ContextKey = &key
}
if v.Regexp != nil {
pattern := *v.Regexp
pattern, _ = UnquoteRegexp(pattern)
clone.Regexp = &pattern
}
if v.String != nil {
text := *v.String
text, _ = UnquoteString(text)
clone.String = &text
}
if v.Int != nil {
num := *v.Int
clone.Int = &num
}
if v.Float != nil {
num := *v.Float
clone.Float = &num
}
if v.Bool != nil {
bl := *v.Bool
clone.Bool = &bl
}
if v.Nil != nil {
nl := *v.Nil
clone.Nil = &nl
}
return
}
func UnquoteString(s string) (out string, err error) {
if s != "" {
last := len(s) - 1
for _, quote := range []uint8{'\'', '"'} {
if s[0] == quote {
if s[last] == quote {
out = s[1:last]
} else {
err = fmt.Errorf(`expected closing quote "%v"`, string(quote))
}
return
}
}
}
return
}
func UnquoteRegexp(s string) (out string, err error) {
if s != "" {
last := len(s) - 1
for _, quote := range []uint8{'/', '!', '@', '~'} {
if s[0] == quote {
if s[last] == quote {
out = s[1:last]
} else {
err = fmt.Errorf(`expected closing character "%v"`, string(quote))
}
return
}
}
}
return
}