1945 default:
1946 if (useBlockScope() && (type == LET && lookaheadIsLetDeclaration(true) || type == CONST)) {
1947 flags |= ForNode.PER_ITERATION_SCOPE;
1948 // LET/CONST declaration captured in container block created above.
1949 varDeclList = variableDeclarationList(varType = type, false, forStart);
1950 break;
1951 }
1952 if (env._const_as_var && type == CONST) {
1953 // Var declaration captured in for outer block.
1954 varDeclList = variableDeclarationList(varType = TokenType.VAR, false, forStart);
1955 break;
1956 }
1957
1958 init = expression(unaryExpression(), COMMARIGHT.getPrecedence(), true);
1959 break;
1960 }
1961
1962 switch (type) {
1963 case SEMICOLON:
1964 // for (init; test; modify)
1965
1966 // for each (init; test; modify) is invalid
1967 if ((flags & ForNode.IS_FOR_EACH) != 0) {
1968 throw error(AbstractParser.message("for.each.without.in"), token);
1969 }
1970
1971 expect(SEMICOLON);
1972 if (type != SEMICOLON) {
1973 test = joinPredecessorExpression();
1974 }
1975 expect(SEMICOLON);
1976 if (type != RPAREN) {
1977 modify = joinPredecessorExpression();
1978 }
1979 break;
1980
1981 case IDENT:
1982 if (env._es6 && "of".equals(getValue())) {
1983 isForOf = true;
1984 // fall through
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1945 default:
1946 if (useBlockScope() && (type == LET && lookaheadIsLetDeclaration(true) || type == CONST)) {
1947 flags |= ForNode.PER_ITERATION_SCOPE;
1948 // LET/CONST declaration captured in container block created above.
1949 varDeclList = variableDeclarationList(varType = type, false, forStart);
1950 break;
1951 }
1952 if (env._const_as_var && type == CONST) {
1953 // Var declaration captured in for outer block.
1954 varDeclList = variableDeclarationList(varType = TokenType.VAR, false, forStart);
1955 break;
1956 }
1957
1958 init = expression(unaryExpression(), COMMARIGHT.getPrecedence(), true);
1959 break;
1960 }
1961
1962 switch (type) {
1963 case SEMICOLON:
1964 // for (init; test; modify)
1965 if (varDeclList != null) {
1966 assert init == null;
1967 init = varDeclList.init;
1968 // late check for missing assignment, now we know it's a for (init; test; modify) loop
1969 if (varDeclList.missingAssignment != null) {
1970 if (varDeclList.missingAssignment instanceof IdentNode) {
1971 throw error(AbstractParser.message("missing.const.assignment", ((IdentNode)varDeclList.missingAssignment).getName()));
1972 } else {
1973 throw error(AbstractParser.message("missing.destructuring.assignment"), varDeclList.missingAssignment.getToken());
1974 }
1975 }
1976 }
1977
1978 // for each (init; test; modify) is invalid
1979 if ((flags & ForNode.IS_FOR_EACH) != 0) {
1980 throw error(AbstractParser.message("for.each.without.in"), token);
1981 }
1982
1983 expect(SEMICOLON);
1984 if (type != SEMICOLON) {
1985 test = joinPredecessorExpression();
1986 }
1987 expect(SEMICOLON);
1988 if (type != RPAREN) {
1989 modify = joinPredecessorExpression();
1990 }
1991 break;
1992
1993 case IDENT:
1994 if (env._es6 && "of".equals(getValue())) {
1995 isForOf = true;
1996 // fall through
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