tl
Package tl implements TL (Type Language) schema parser and writer. Inspired by grammers parser.
Used by gotd/td in code generation pipeline.
go get github.com/gotd/tlParsing
This program parses schema from stdin and prints all definitions with their names and types.
package main
import (
"fmt"
"os"
"github.com/gotd/tl"
)
func main() {
schema, err := tl.Parse(os.Stdin)
if err != nil {
panic(err)
}
for _, d := range schema.Definitions {
fmt.Printf("%s#%x = %s;\n", d.Definition.Name, d.Definition.ID, d.Definition.Type)
}
}You can use it like that:
$ curl -s "https://raw.githubusercontent.com/tdlib/td/master/td/generate/scheme/td_api.tl" \
| go run github.com/gotd/tl/cmd/tl-print \
| lessOutput:
double#2210c154 = Double;
string#b5286e24 = String;
int32#5cb934fa = Int32;
int53#6781c7ee = Int53;
int64#5d9ed744 = Int64;
bytes#e937bb82 = Bytes;
boolFalse#bc799737 = Bool;
boolTrue#997275b5 = Bool;
error#9bdd8f1a = Error;
ok#d4edbe69 = Ok;
tdlibParameters#d29c1d7b = TdlibParameters;
//...Generating
You can also generate .tl file from tl.Schema.
Any WriteTo result is valid input for Parse.
package main
import (
"os"
"github.com/gotd/tl"
)
func main() {
def := tl.Definition{
Name: "error",
Type: tl.Type{Name: "Error"},
// Currently you should always pass explicit ID.
ID: 0x9bdd8f1a,
Params: []tl.Parameter{
{
Name: "code",
Type: tl.Type{Name: "int32", Bare: true},
},
{
Name: "message",
Type: tl.Type{Name: "string", Bare: true},
},
},
}
_, _ = tl.Schema{
Definitions: []tl.SchemaDefinition{
{
Category: tl.CategoryType,
Definition: def,
},
},
}.WriteTo(os.Stdout)
}Output
error#9bdd8f1a code:int32 message:string = Error;