vbscript: Added negation expression parser/compiler implementation.

dlls/vbscript/compile.c

@@ -246,6 +246,8 @@ static HRESULT compile_expression(compile_ctx_t *ctx, expression_t *expr)
         return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_equal);
     case EXPR_MEMBER:
         return compile_member_expression(ctx, (member_expression_t*)expr, TRUE);
+    case EXPR_NEG:
+        return compile_unary_expression(ctx, (unary_expression_t*)expr, OP_neg);
     case EXPR_NOT:
         return compile_unary_expression(ctx, (unary_expression_t*)expr, OP_not);
     case EXPR_NULL:

dlls/vbscript/interp.c

@@ -391,6 +391,12 @@ static HRESULT interp_concat(exec_ctx_t *ctx)
     return stack_push(ctx, &v);
 }
 
+static HRESULT interp_neg(exec_ctx_t *ctx)
+{
+    FIXME("\n");
+    return E_NOTIMPL;
+}
+
 static const instr_func_t op_funcs[] = {
 #define X(x,n,a,b) interp_ ## x,
 OP_LIST

dlls/vbscript/parse.h

@@ -23,6 +23,7 @@ typedef enum {
     EXPR_EMPTY,
     EXPR_EQUAL,
     EXPR_MEMBER,
+    EXPR_NEG,
     EXPR_NOT,
     EXPR_NULL,
     EXPR_STRING,

dlls/vbscript/parser.y

@@ -84,7 +84,7 @@ static statement_t *new_call_statement(parser_ctx_t*,member_expression_t*);
 %type <statement> Statement StatementNl
 %type <expression> Expression LiteralExpression PrimaryExpression EqualityExpression CallExpression
 %type <expression> ConcatExpression AdditiveExpression
-%type <expression> NotExpression
+%type <expression> NotExpression UnaryExpression
 %type <member> MemberExpression
 %type <expression> Arguments_opt ArgumentList_opt ArgumentList
 %type <bool> OptionExplicit_opt
@@ -145,8 +145,13 @@ ConcatExpression
     | ConcatExpression '&' AdditiveExpression   { $$ = new_binary_expression(ctx, EXPR_CONCAT, $1, $3); CHECK_ERROR; }
 
 AdditiveExpression
-    : LiteralExpression /* FIXME */ { $$ = $1; }
-    | CallExpression /* FIXME */    { $$ = $1; }
+    : UnaryExpression /* FIXME */   { $$ = $1; }
+
+
+UnaryExpression
+    : LiteralExpression             { $$ = $1; }
+    | CallExpression                { $$ = $1; }
+    | '-' UnaryExpression           { $$ = new_unary_expression(ctx, EXPR_NEG, $2); CHECK_ERROR; }
 
 CallExpression
     : PrimaryExpression                 { $$ = $1; }

dlls/vbscript/vbscript.h

@@ -96,6 +96,7 @@ typedef enum {
     X(icall,          1, ARG_BSTR,    ARG_UINT)   \
     X(icallv,         1, ARG_BSTR,    ARG_UINT)   \
     X(long,           1, ARG_INT,     0)          \
+    X(neg,            1, 0,           0)          \
     X(not,            1, 0,           0)          \
     X(null,           1, 0,           0)          \
     X(ret,            0, 0,           0)          \