Golang typesutil.IsJsPackage函數代碼示例

//.........這裏部分代碼省略.........
			c.PrintCond(false, "goto "+s.Label.Name, fmt.Sprintf("$s = %d; continue;", c.labelCase(c.p.Uses[s.Label].(*types.Label))))
		case token.FALLTHROUGH:
			// handled in CaseClause
		default:
			panic("Unhandled branch statment: " + s.Tok.String())
		}

	case *ast.ReturnStmt:
		results := s.Results
		if c.resultNames != nil {
			if len(s.Results) != 0 {
				c.translateStmt(&ast.AssignStmt{
					Lhs: c.resultNames,
					Tok: token.ASSIGN,
					Rhs: s.Results,
				}, nil)
			}
			results = c.resultNames
		}
		c.Printf("return%s;", c.translateResults(results))

	case *ast.DeferStmt:
		isBuiltin := false
		isJs := false
		switch fun := s.Call.Fun.(type) {
		case *ast.Ident:
			var builtin *types.Builtin
			builtin, isBuiltin = c.p.Uses[fun].(*types.Builtin)
			if isBuiltin && builtin.Name() == "recover" {
				c.Printf("$deferred.push([$recover, []]);")
				return
			}
		case *ast.SelectorExpr:
			isJs = typesutil.IsJsPackage(c.p.Uses[fun.Sel].Pkg())
		}
		sig := c.p.Types[s.Call.Fun].Type.Underlying().(*types.Signature)
		args := c.translateArgs(sig, s.Call.Args, s.Call.Ellipsis.IsValid(), true)
		if isBuiltin || isJs {
			vars := make([]string, len(s.Call.Args))
			callArgs := make([]ast.Expr, len(s.Call.Args))
			for i, arg := range s.Call.Args {
				v := c.newVariable("_arg")
				vars[i] = v
				callArgs[i] = c.newIdent(v, c.p.Types[arg].Type)
			}
			call := c.translateExpr(&ast.CallExpr{
				Fun:      s.Call.Fun,
				Args:     callArgs,
				Ellipsis: s.Call.Ellipsis,
			})
			c.Printf("$deferred.push([function(%s) { %s; }, [%s]]);", strings.Join(vars, ", "), call, strings.Join(args, ", "))
			return
		}
		c.Printf("$deferred.push([%s, [%s]]);", c.translateExpr(s.Call.Fun), strings.Join(args, ", "))

	case *ast.AssignStmt:
		if s.Tok != token.ASSIGN && s.Tok != token.DEFINE {
			panic(s.Tok)
		}

		if s.Tok == token.DEFINE {
			for _, lhs := range s.Lhs {
				if !isBlank(lhs) {
					obj := c.p.Defs[lhs.(*ast.Ident)]
					if obj == nil {
						obj = c.p.Uses[lhs.(*ast.Ident)]

func (c *funcContext) translateExpr(expr ast.Expr) *expression {
	exprType := c.p.TypeOf(expr)
	if value := c.p.Types[expr].Value; value != nil {
		basic := exprType.Underlying().(*types.Basic)
		switch {
		case isBoolean(basic):
			return c.formatExpr("%s", strconv.FormatBool(exact.BoolVal(value)))
		case isInteger(basic):
			if is64Bit(basic) {
				if basic.Kind() == types.Int64 {
					d, ok := exact.Int64Val(value)
					if !ok {
						panic("could not get exact uint")
					}
					return c.formatExpr("new %s(%s, %s)", c.typeName(exprType), strconv.FormatInt(d>>32, 10), strconv.FormatUint(uint64(d)&(1<<32-1), 10))
				}
				d, ok := exact.Uint64Val(value)
				if !ok {
					panic("could not get exact uint")
				}
				return c.formatExpr("new %s(%s, %s)", c.typeName(exprType), strconv.FormatUint(d>>32, 10), strconv.FormatUint(d&(1<<32-1), 10))
			}
			d, ok := exact.Int64Val(value)
			if !ok {
				panic("could not get exact int")
			}
			return c.formatExpr("%s", strconv.FormatInt(d, 10))
		case isFloat(basic):
			f, _ := exact.Float64Val(value)
			return c.formatExpr("%s", strconv.FormatFloat(f, 'g', -1, 64))
		case isComplex(basic):
			r, _ := exact.Float64Val(exact.Real(value))
			i, _ := exact.Float64Val(exact.Imag(value))
			if basic.Kind() == types.UntypedComplex {
				exprType = types.Typ[types.Complex128]
			}
			return c.formatExpr("new %s(%s, %s)", c.typeName(exprType), strconv.FormatFloat(r, 'g', -1, 64), strconv.FormatFloat(i, 'g', -1, 64))
		case isString(basic):
			return c.formatExpr("%s", encodeString(exact.StringVal(value)))
		default:
			panic("Unhandled constant type: " + basic.String())
		}
	}

	var obj types.Object
	switch e := expr.(type) {
	case *ast.SelectorExpr:
		obj = c.p.Uses[e.Sel]
	case *ast.Ident:
		obj = c.p.Defs[e]
		if obj == nil {
			obj = c.p.Uses[e]
		}
	}

	if obj != nil && typesutil.IsJsPackage(obj.Pkg()) {
		switch obj.Name() {
		case "Global":
			return c.formatExpr("$global")
		case "Module":
			return c.formatExpr("$module")
		case "Undefined":
			return c.formatExpr("undefined")
		}
	}

	switch e := expr.(type) {
	case *ast.CompositeLit:
		if ptrType, isPointer := exprType.(*types.Pointer); isPointer {
			exprType = ptrType.Elem()
		}

		collectIndexedElements := func(elementType types.Type) []string {
			var elements []string
			i := 0
			zero := c.translateExpr(c.zeroValue(elementType)).String()
			for _, element := range e.Elts {
				if kve, isKve := element.(*ast.KeyValueExpr); isKve {
					key, ok := exact.Int64Val(c.p.Types[kve.Key].Value)
					if !ok {
						panic("could not get exact int")
					}
					i = int(key)
					element = kve.Value
				}
				for len(elements) <= i {
					elements = append(elements, zero)
				}
				elements[i] = c.translateImplicitConversionWithCloning(element, elementType).String()
				i++
			}
			return elements
		}

		switch t := exprType.Underlying().(type) {
		case *types.Array:
			elements := collectIndexedElements(t.Elem())
			if len(elements) == 0 {
				return c.formatExpr("%s.zero()", c.typeName(t))
			}
//.........這裏部分代碼省略.........