vbscript: Added concatenation expression parser/compiler support.

dlls/vbscript/compile.c

@@ -236,6 +236,8 @@ static HRESULT compile_expression(compile_ctx_t *ctx, expression_t *expr)
     switch(expr->type) {
     case EXPR_BOOL:
         return push_instr_int(ctx, OP_bool, ((bool_expression_t*)expr)->value);
+    case EXPR_CONCAT:
+        return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_concat);
     case EXPR_DOUBLE:
         return push_instr_double(ctx, OP_double, ((double_expression_t*)expr)->value);
     case EXPR_EMPTY:

dlls/vbscript/interp.c

@@ -367,6 +367,12 @@ static HRESULT interp_equal(exec_ctx_t *ctx)
     return stack_push(ctx, &v);
 }
 
+static HRESULT interp_concat(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

@@ -18,6 +18,7 @@
 
 typedef enum {
     EXPR_BOOL,
+    EXPR_CONCAT,
     EXPR_DOUBLE,
     EXPR_EMPTY,
     EXPR_EQUAL,

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
+%type <expression> ConcatExpression AdditiveExpression
 %type <expression> NotExpression
 %type <member> MemberExpression
 %type <expression> Arguments_opt ArgumentList_opt ArgumentList
@@ -141,6 +141,10 @@ EqualityExpression
     | EqualityExpression '=' ConcatExpression   { $$ = new_binary_expression(ctx, EXPR_EQUAL, $1, $3); CHECK_ERROR; }
 
 ConcatExpression
+    : AdditiveExpression                        { $$ = $1; }
+    | ConcatExpression '&' AdditiveExpression   { $$ = new_binary_expression(ctx, EXPR_CONCAT, $1, $3); CHECK_ERROR; }
+
+AdditiveExpression
     : LiteralExpression /* FIXME */ { $$ = $1; }
     | CallExpression /* FIXME */    { $$ = $1; }
 

dlls/vbscript/vbscript.h

@@ -89,6 +89,7 @@ typedef enum {
 
 #define OP_LIST                                   \
     X(bool,           1, ARG_INT,     0)          \
+    X(concat,         1, 0,           0)          \
     X(double,         1, ARG_DOUBLE,  0)          \
     X(empty,          1, 0,           0)          \
     X(equal,          1, 0,           0)          \