添加了select语句, 可以看成丐版switch,

它是较为原始的直接对应语法树中`Select`的语句,
有时相较`switch`也会更方便

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "mindustry_logic_bang_lang"
-version = "0.7.7"
+version = "0.7.8"
 edition = "2021"
 
 authors = ["A4-Tacks <[email protected]>"]

examples/control.mdtlbl

@@ -112,3 +112,23 @@ jump 2 lessThan i 10
 *#
 # 它的缺点是, 需要多一条跳转, 所以这导致while并没有采用这种形式
 # 当然, 在手写逻辑时, 我们很喜欢这么写, 因为比较省力
+
+
+select x {
+    print 0;
+    print 1 "is one!";
+    print 2;
+}
+#* >>>
+op mul __0 x 2
+op add @counter @counter __0
+print 0
+noop
+print 1
+print "is one!"
+print 2
+noop
+*#
+# select是原始版本, 没有switch那么多的功能,
+# 但是相比switch的好处是不用编写case, 直接跳转到指定行
+#   第0行, 第1行 以此类推

src/syntax.rs

@@ -2802,4 +2802,30 @@ mod tests {
                    "print a",
         ]);
     }
+
+    #[test]
+    fn select_test() {
+        let parser = ExpandParser::new();
+
+        let logic_lines = CompileMeta::new().compile(parse!(parser, r#"
+        select 1 {
+            print 0;
+            {
+                print 1 " is one!";
+            }
+            print 2;
+        }
+        "#).unwrap()).compile().unwrap();
+        assert_eq!(logic_lines, vec![
+                   "op mul __0 1 2",
+                   "op add @counter @counter __0",
+                   "print 0",
+                   "noop",
+                   "print 1",
+                   "print \" is one!\"",
+                   "print 2",
+                   "noop",
+        ]);
+
+    }
 }

src/syntax_def.lalrpop

@@ -280,7 +280,8 @@ pub BuiltinCommand: LogicLine = {
     "setres" <Value> LEnd => LogicLine::SetResultHandle(<>),
 }
 
-pub Block: LogicLine = MBlock<Expand> => <>.into();
+BlockExpand: Expand = MBlock<Expand> => <>;
+pub Block: LogicLine = BlockExpand => <>.into();
 
 pub DExp: DExp = MTuple<(<(<Var> ":")?> <Expand>)>
     => DExp::new_optional_res(<>.0, <>.1);
@@ -369,6 +370,8 @@ pub Control: LogicLine = {
         Select(value, Expand(cases_res)).into()
     },
 
+    "select" <value:Value> <lines:BlockExpand> => Select(value, lines).into(),
+
     "if" <cmp:JumpCmp> <body:Block>
         <elifs:("elif" <JumpCmp> <Block>)*>
         <else_body:("else" <LogicLine>)?> => {

syntax/vim/mdtlbl.snippets

@@ -22,12 +22,12 @@ skip ${1:_} {
 }
 endsnippet
 snippet if "if" w
-if ${1:_} {
+if $1 {
 	$0
 }
 endsnippet
 snippet elif "elif" w
-elif ${1:_} {
+elif $1 {
 	$0
 }
 endsnippet
@@ -53,7 +53,7 @@ snippet iop "op self" w
 op ${1:i} $1 ${2:+} ${3:1};$0
 endsnippet
 snippet switch "switch" w
-switch ${1:x} {
+switch $1 {
 	$0
 }
 endsnippet
@@ -87,3 +87,8 @@ endsnippet
 snippet drawflush "drawflush message1" w
 drawflush ${1:display1};$0
 endsnippet
+snippet select "select" w
+select $1 {
+	$0
+}
+endsnippet

syntax/vim/mdtlbl.vim

@@ -24,7 +24,9 @@ syn case match
 
 
 " 控制语句 {{{1
-syn keyword mdtlblKeyword while do skip goto if elif else switch case const take gwhile setres
+syn keyword mdtlblKeyword
+            \ while do skip goto if elif else
+            \ switch case const take gwhile setres select
 hi link mdtlblKeyword Keyword