diff options
Diffstat (limited to 'chapter25/src/main/java')
| -rw-r--r-- | chapter25/src/main/java/com/seaofnodes/simple/Parser.java | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/chapter25/src/main/java/com/seaofnodes/simple/Parser.java b/chapter25/src/main/java/com/seaofnodes/simple/Parser.java index 1dc50c75..1f03eda6 100644 --- a/chapter25/src/main/java/com/seaofnodes/simple/Parser.java +++ b/chapter25/src/main/java/com/seaofnodes/simple/Parser.java @@ -1978,6 +1978,8 @@ public class Parser { return parsePostfixMethod(rvalue,_scope.in(_scope.update(_scope.var(selfx),null))); } // Assign-update direct into Scope + if( var._final ) + throw error("Cannot reassign final '"+var._name+"'"); Node op = opAssign(ch,rvalue, var.type() ); _scope.update(var,op); return postfix(ch) ? rvalue.unkeep() : op; @@ -2001,13 +2003,17 @@ public class Parser { // flt + flt ==>> use float op Node op = switch(ch) { case 1, (char)-1, - '+' -> new AddNode(lhs,rhs); - case '-' -> new SubNode(lhs,rhs); - case '*' -> new MulNode(lhs,rhs); - case '/' -> new DivNode(lhs,rhs); - case '|' -> new OrNode(null,lhs,rhs); - case '&' -> new AndNode(null,lhs,rhs); - default -> throw TODO(); + '+' -> new AddNode(lhs,rhs); + case '-' -> new SubNode(lhs,rhs); + case '*' -> new MulNode(lhs,rhs); + case '/' -> new DivNode(lhs,rhs); + case '|' -> new OrNode(null,lhs,rhs); + case '&' -> new AndNode(null,lhs,rhs); + case '^' -> new XorNode(loc(),lhs,rhs); + case Lexer.SHL -> new ShlNode(loc(),lhs,rhs); + case Lexer.SAR -> new SarNode(loc(),lhs,rhs); + case Lexer.SHR -> new ShrNode(loc(),lhs,rhs); + default -> throw TODO(); }; // Convert to float ops, or narrow int types; error if not declared type. // Also, if postfix LHS is still keep() @@ -2824,8 +2830,14 @@ public class Parser { // Next oper= character, or 0. // As a convenience, mark "++" as a char 1 and "--" as char -1 (65535) + // Distinct tags for the multi-character compound operators. + static final char SHL = 2, SAR = 3, SHR = 4; + public char matchOperAssign() { skipWhiteSpace(); + if( match("<<=" ) ) return SHL; + if( match(">>>=") ) return SHR; + if( match(">>=" ) ) return SAR; if( _position+2 >= _input.length ) return 0; char ch0 = (char)_input[_position]; if( "+-/*&|^".indexOf(ch0) == -1 ) return 0; |