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// Package parse implements a parser for acc programs.
package parse
import (
"io"
"strings"
"github.com/mmcloughlin/addchain/acc/ast"
"github.com/mmcloughlin/addchain/acc/parse/internal/parser"
)
//go:generate pigeon -o internal/parser/zparser.go acc.peg
// File parses filename.
func File(filename string) (*ast.Chain, error) {
return cast(parser.ParseFile(filename))
}
// Reader parses the data from r using filename as information in
// error messages.
func Reader(filename string, r io.Reader) (*ast.Chain, error) {
return cast(parser.ParseReader(filename, r))
}
// String parses s.
func String(s string) (*ast.Chain, error) {
return Reader("string", strings.NewReader(s))
}
func cast(i interface{}, err error) (*ast.Chain, error) {
if err != nil {
return nil, err
}
return i.(*ast.Chain), nil
}
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