vbscript: Added additive expressions parser/compiler implementation.

dlls/vbscript/compile.c

@@ -234,6 +234,8 @@ static HRESULT compile_binary_expression(compile_ctx_t *ctx, binary_expression_t
 static HRESULT compile_expression(compile_ctx_t *ctx, expression_t *expr)
 {
     switch(expr->type) {
+    case EXPR_ADD:
+        return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_add);
     case EXPR_BOOL:
         return push_instr_int(ctx, OP_bool, ((bool_expression_t*)expr)->value);
     case EXPR_CONCAT:
@@ -254,6 +256,8 @@ static HRESULT compile_expression(compile_ctx_t *ctx, expression_t *expr)
         return push_instr(ctx, OP_null) != -1 ? S_OK : E_OUTOFMEMORY;
     case EXPR_STRING:
         return push_instr_str(ctx, OP_string, ((string_expression_t*)expr)->value);
+    case EXPR_SUB:
+        return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_sub);
     case EXPR_USHORT:
         return push_instr_int(ctx, OP_short, ((int_expression_t*)expr)->value);
     case EXPR_ULONG:

dlls/vbscript/interp.c

@@ -391,6 +391,18 @@ static HRESULT interp_concat(exec_ctx_t *ctx)
     return stack_push(ctx, &v);
 }
 
+static HRESULT interp_add(exec_ctx_t *ctx)
+{
+    FIXME("\n");
+    return E_NOTIMPL;
+}
+
+static HRESULT interp_sub(exec_ctx_t *ctx)
+{
+    FIXME("\n");
+    return E_NOTIMPL;
+}
+
 static HRESULT interp_neg(exec_ctx_t *ctx)
 {
     variant_val_t val;

dlls/vbscript/parse.h

@@ -17,6 +17,7 @@
  */
 
 typedef enum {
+    EXPR_ADD,
     EXPR_BOOL,
     EXPR_CONCAT,
     EXPR_DOUBLE,
@@ -27,6 +28,7 @@ typedef enum {
     EXPR_NOT,
     EXPR_NULL,
     EXPR_STRING,
+    EXPR_SUB,
     EXPR_ULONG,
     EXPR_USHORT
 } expression_type_t;

dlls/vbscript/parser.y

@@ -83,7 +83,7 @@ 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> ConcatExpression AdditiveExpression ModExpression
 %type <expression> NotExpression UnaryExpression
 %type <member> MemberExpression
 %type <expression> Arguments_opt ArgumentList_opt ArgumentList
@@ -145,6 +145,11 @@ ConcatExpression
     | ConcatExpression '&' AdditiveExpression   { $$ = new_binary_expression(ctx, EXPR_CONCAT, $1, $3); CHECK_ERROR; }
 
 AdditiveExpression
+    : ModExpression                             { $$ = $1; }
+    | AdditiveExpression '+' ModExpression      { $$ = new_binary_expression(ctx, EXPR_ADD, $1, $3); CHECK_ERROR; }
+    | AdditiveExpression '-' ModExpression      { $$ = new_binary_expression(ctx, EXPR_SUB, $1, $3); CHECK_ERROR; }
+
+ModExpression
     : UnaryExpression /* FIXME */   { $$ = $1; }
 
 

dlls/vbscript/vbscript.h

@@ -88,6 +88,7 @@ typedef enum {
 } instr_arg_type_t;
 
 #define OP_LIST                                   \
+    X(add,            1, 0,           0)          \
     X(bool,           1, ARG_INT,     0)          \
     X(concat,         1, 0,           0)          \
     X(double,         1, ARG_DOUBLE,  0)          \
@@ -101,7 +102,8 @@ typedef enum {
     X(null,           1, 0,           0)          \
     X(ret,            0, 0,           0)          \
     X(short,          1, ARG_INT,     0)          \
-    X(string,         1, ARG_STR,     0)
+    X(string,         1, ARG_STR,     0)          \
+    X(sub,            1, 0,           0)
 
 typedef enum {
 #define X(x,n,a,b) OP_##x,