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package tcl
import (
"log"
"os"
"github.com/davecgh/go-spew/spew"
. "github.com/oec/goparsify"
)
// Tcl parser, using combinators
// Based on the grammer in:
// https://wiki.tcl-lang.org/page/BNF+for+Tcl
var (
word Parser
commands Parser
script Parser
)
var (
comment = NewParser("comment", Merge(NoAutoWS(Seq("#", NotChars("\r\n"))))).Map(found("comment"))
wordExp = NewParser("{*}word", NoAutoWS(Seq("{*}", &word))).Map(found("wordExp"))
wordSub = NewParser("[*]word", NoAutoWS(Seq("[*]", &word))).Map(found("wordSub"))
wordBrc = NewParser("{word}", Seq("{", &word, "}")).Map(found("wordBrc"))
wordQtd = NewParser(`"word"`, StringLit(`"`)).Map(found("wordQtd"))
wordSmp = NewParser("simple", NotChars("{}[]*")).Map(found("simple"))
command = NewParser("command", Many(&word)).Map(found("command")).Map(found("command"))
)
func init() {
word = NewParser("word", Any(&wordSmp, &wordQtd, &wordBrc, &wordSub, &wordExp)).Map(found("word"))
commands = NewParser("commands", Any(&command, Maybe(Chars(";"))))
script = NewParser("script", Many(Any(&comment, &commands)))
}
func Parse(input string) (data interface{}, e error) {
data, e = Run(&script, input, ASCIIWhitespace)
return
}
func ParseDebug(input string) (data interface{}, e error) {
EnableLogging(os.Stdout)
data, e = Run(&script, input, ASCIIWhitespace)
return
}
func found(typ string) func(*Result) {
return func(r *Result) {
log.Println("found a", typ)
spew.Dump(r)
}
}
func dump(r *Result) {
spew.Dump(r)
}
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