sjansen/messageformat

package compiler

import (
    "fmt"
    "strings"

    "github.com/sjansen/messageformat/ast"
    "golang.org/x/text/language"
)

type plainArg struct {
    ArgID string
}

func newPlainArg(lang language.Tag, p *ast.PlainArg) (*plainArg, error) {
    return &plainArg{ArgID: p.ArgID}, nil
}

func (p *plainArg) format(b *strings.Builder, lang language.Tag, arguments map[string]interface{}) error {
    value, ok := arguments[p.ArgID]
    if !ok {
        return fmt.Errorf("missing arg: %q", p.ArgID)
    }
    str, ok := value.(string)
    if !ok {
        return fmt.Errorf("expected string got: %T", value)
    }
    b.WriteString(str)
    return nil
}