comparison: parser.cxx
parser.cxx
- changeset 52
- f2596a239ea1
- parent 51
- 2cfa6edbf928
- child 53
- 9ef7e549391f
equal
deleted
inserted
replaced
| 51:2cfa6edbf928 | 52:f2596a239ea1 |
|---|---|
| 644 return false; | 644 return false; |
| 645 } | 645 } |
| 646 | 646 |
| 647 // ============================================================================ | 647 // ============================================================================ |
| 648 // Finds an operator's corresponding dataheader | 648 // Finds an operator's corresponding dataheader |
| 649 static long DataHeaderByOperator (ScriptVar* var, int oper) { | 649 static word DataHeaderByOperator (ScriptVar* var, int oper) { |
| 650 if (IsAssignmentOperator (oper)) { | 650 if (IsAssignmentOperator (oper)) { |
| 651 if (!var) | 651 if (!var) |
| 652 error ("operator %d requires left operand to be a variable\n", oper); | 652 error ("operator %d requires left operand to be a variable\n", oper); |
| 653 | 653 |
| 654 // TODO: At the moment, vars only are global | 654 // TODO: At the moment, vars only are global |
| 788 // a literal or an expression. | 788 // a literal or an expression. |
| 789 DataBuffer* ScriptReader::ParseExprValue (int reqtype) { | 789 DataBuffer* ScriptReader::ParseExprValue (int reqtype) { |
| 790 DataBuffer* b = new DataBuffer(16); | 790 DataBuffer* b = new DataBuffer(16); |
| 791 | 791 |
| 792 ScriptVar* g; | 792 ScriptVar* g; |
| 793 | |
| 794 // Prefixing "!" means negation. | |
| 795 bool negate = !token.compare ("!"); | |
| 796 if (negate) // Jump past the "!" | |
| 797 MustNext (); | |
| 793 | 798 |
| 794 if (!token.compare ("(")) { | 799 if (!token.compare ("(")) { |
| 795 // Expression | 800 // Expression |
| 796 MustNext (); | 801 MustNext (); |
| 797 DataBuffer* c = ParseExpression (reqtype); | 802 DataBuffer* c = ParseExpression (reqtype); |
| 836 b->Write<word> (PushToStringTable (token.chars())); | 841 b->Write<word> (PushToStringTable (token.chars())); |
| 837 break; | 842 break; |
| 838 } | 843 } |
| 839 } | 844 } |
| 840 | 845 |
| 846 // Negate it now if desired | |
| 847 if (negate) | |
| 848 b->Write<word> (DH_NEGATELOGICAL); | |
| 849 | |
| 841 return b; | 850 return b; |
| 842 } | 851 } |
| 843 | 852 |
| 844 // ============================================================================ | 853 // ============================================================================ |
| 845 // Parses an assignment. An assignment starts with a variable name, followed | 854 // Parses an assignment. An assignment starts with a variable name, followed |
