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|
package lexer
import (
"fmt"
"github.com/antonmedv/expr/file"
)
type Kind string
const (
Identifier Kind = "Identifier"
Number = "Number"
String = "String"
Operator = "Operator"
Bracket = "Bracket"
EOF = "EOF"
)
type Token struct {
file.Location
Kind Kind
Value string
}
func (t Token) String() string {
if t.Value == "" {
return string(t.Kind)
}
return fmt.Sprintf("%s(%#v)", t.Kind, t.Value)
}
func (t Token) Is(kind Kind, values ...string) bool {
if len(values) == 0 {
return kind == t.Kind
}
for _, v := range values {
if v == t.Value {
goto found
}
}
return false
found:
return kind == t.Kind
}
|
