Exemplo n.º 1
0
func ListParserExt(env Env) p.Parser {
	left := p.Bind_(p.Rune('('), Skip)
	right := p.Bind_(Skip, p.Rune(')'))
	empty := p.Between(left, right, Skip)
	return func(st p.ParseState) (interface{}, error) {
		list, err := p.Between(left, right, bodyParserExt(env))(st)
		if err == nil {
			switch l := list.(type) {
			case List:
				return L(l), nil
			case []interface{}:
				return List(l), nil
			default:
				return nil, fmt.Errorf("List Parser(ext) Error: %v type is unexcepted: %v", list, reflect.TypeOf(list))
			}
		} else {
			_, e := empty(st)
			if e == nil {
				return List{}, nil
			} else {
				return nil, err
			}
		}
	}
}
Exemplo n.º 2
0
func TestParsecRune2(t *testing.T) {
	g := NewGispWith(
		map[string]Toolbox{
			"axiom": Axiom, "props": Propositions, "time": Time},
		map[string]Toolbox{"time": Time, "p": Parsec})
	//data := "Here is a Rune : 'a' and a is't a rune. It is a word in sentence."
	data := "'a' and a is't a rune. It is a word in sentence."
	state := p.MemoryParseState(data)
	pre, err := p.Between(p.Rune('\''), p.Rune('\''), p.AnyRune)(state)
	if err != nil {
		t.Fatalf("except found rune expr from \"%v\" but error:%v", data, err)
	}
	src := `
	(let ((st (p.state "` + data + `")))
		((p.rune '\'') st)
		(var data (p.anyone st))
		((p.rune '\'') st)
		data)
	`

	//fmt.Println(src)
	gre, err := g.Parse(src)
	if err != nil {
		t.Fatalf("except \"%v\" pass gisp '<rune>' but error:%v", src, err)
	}
	t.Logf("from gisp: %v", gre)
	t.Logf("from parsec: %v", pre)
	if !reflect.DeepEqual(pre, gre) {
		t.Fatalf("except got \"%v\" from gisp equal \"%v\" from parsec", gre, pre)
	}
}
Exemplo n.º 3
0
Arquivo: type.go Projeto: zy02636/gisp
func MapTypeParser(st p.ParseState) (interface{}, error) {
	key, err := p.Between(p.String("map["), p.Rune(']'), TypeParser)(st)
	if err != nil {
		return nil, err
	}
	value, err := TypeParser(st)
	if err != nil {
		return nil, err
	}
	return reflect.MapOf(key.(Type).Type, value.(Type).Type), nil
}
Exemplo n.º 4
0
		case '\'':
			return '\'', nil
		case '\\':
			return '\\', nil
		case 't':
			return '\t', nil
		default:
			return nil, st.Trap("Unknown escape sequence \\%c", r)
		}
	} else {
		return nil, err
	}
})

var RuneParser = p.Bind(
	p.Between(p.Rune('\''), p.Rune('\''),
		p.Either(p.Try(EscapeCharr), p.NoneOf("'"))),
	func(x interface{}) p.Parser {
		return p.Return(Rune(x.(rune)))
	},
)

var StringParser = p.Bind(
	p.Between(p.Rune('"'), p.Rune('"'),
		p.Many(p.Either(p.Try(EscapeChars), p.NoneOf("\"")))),
	p.ReturnString)

func bodyParser(st p.ParseState) (interface{}, error) {
	value, err := p.SepBy(ValueParser, p.Many1(Space))(st)
	return value, err
}
Exemplo n.º 5
0
			var (
				data string
				ok   bool
			)
			if data, ok = param.(string); !ok {
				return nil, ParsexSignErrorf("NoneOf Arg Error:except args has 1 string arg.")
			}
			return ParsecBox(p.NoneOf(data)), nil
		},
		"between": func(env Env, args ...interface{}) (Lisp, error) {
			ptype := reflect.TypeOf((*Parsecer)(nil)).Elem()
			params, err := GetArgs(env, px.UnionAll(TypeAs(ptype), TypeAs(ptype), TypeAs(ptype), px.Eof), args)
			if err != nil {
				return nil, err
			}
			return ParsecBox(p.Between(params[0].(Parsecer).Parser, params[1].(Parsecer).Parser, params[2].(Parsecer).Parser)), nil
		},
		"bind": func(env Env, args ...interface{}) (Lisp, error) {
			if len(args) != 2 {
				return nil, ParsexSignErrorf("Bind Args Error:except 2 args.")
			}
			prs, err := Eval(env, args[0])
			if err != nil {
				return nil, err
			}
			var parser Parsecer
			var ok bool
			if parser, ok = prs.(Parsecer); !ok {
				return nil, ParsexSignErrorf("Bind Args Error:except first arg is a parsecer.")
			}
			f, err := Eval(env, args[1])
Exemplo n.º 6
0
// BracketParserExt 在带有 Ext 的环境下对中括号表达式求值
func BracketParserExt(env Env) p.Parser {
	return p.Between(p.Rune('['), p.Rune(']'),
		p.SepBy1(ValueParserExt(env), p.Rune(':')),
	)
}
Exemplo n.º 7
0
// BracketParser 尝试将 state 中下一个值解析为中括号表达式
func BracketParser(st p.ParseState) (interface{}, error) {
	return p.Between(p.Rune('['), p.Rune(']'),
		p.SepBy1(ValueParser, p.Rune(':')),
	)(st)
}