support shorthand enums in value-if

compiler/parser/parser.odin

@@ -29,6 +29,8 @@ Parser :: struct {
 	// At the top level of if/for headers, `|` begins captures. Bitwise OR in
 	// those headers remains available inside parentheses.
 	capture_pipe: bool,
+	// A parenthesized `if` condition ends before a leading-dot brace-less body.
+	if_condition: bool,
 	hidden_names: [dynamic]symbol.Id,
 }
 
@@ -1331,6 +1333,10 @@ parse_expression_bp :: proc(parser: ^Parser, minimum_binding_power, nesting: int
 			})
 			continue
 		}
+		if parser.if_condition && parser.delimiter_depth == 0 &&
+		   parser.module.exprs[left].parenthesized && current(parser).kind == .Dot {
+			break
+		}
 		if current(parser).kind == .Dot {
 			advance(parser)
 			if current(parser).kind == .Integer {
@@ -2160,8 +2166,11 @@ parse_if :: proc(parser: ^Parser) -> ast.Stmt_Id {
 	saved := parser.no_struct_literal
 	parser.no_struct_literal = true
 	saved_capture_pipe := parser.capture_pipe
+	saved_if_condition := parser.if_condition
 	parser.capture_pipe = true
+	parser.if_condition = true
 	condition := parse_expression(parser)
+	parser.if_condition = saved_if_condition
 	parser.capture_pipe = saved_capture_pipe
 	parser.no_struct_literal = saved
 	captures: [dynamic]symbol.Id