添加A选项以源码风格显示AST,

 - 将read踢出关键字
 - 将功能稍微分箱
 - 小改报错前缀
 - 对生成的一些`Value::Var`改为`Value::ReprVar`
 - 对跨行字符串稍微修改, 使其换行时使用`\n`

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "mindustry_logic_bang_lang"
-version = "0.8.0"
+version = "0.9.0"
 edition = "2021"
 
 authors = ["A4-Tacks <[email protected]>"]
@@ -15,6 +15,9 @@ lalrpop = "0.20.0"
 
 
 [dependencies]
+tag_code = { path = "./tools/tag_code", version = "*" }
+display_source = { path = "./tools/display_source", version = "*" }
+
 [dependencies.lalrpop-util]
 version = "0.20.0"
 

src/lib.rs

@@ -1,3 +1,3 @@
 pub mod syntax;
 pub mod syntax_def;
-pub mod tag_code;
+pub use tag_code;

src/main.rs

@@ -10,12 +10,12 @@ use std::{
     mem::replace,
 };
 
+use display_source::DisplaySource;
 use lalrpop_util::{
     lexer::Token,
     ParseError
 };
 use mindustry_logic_bang_lang::{
-    err,
     syntax::{
         CompileMeta,
         Error,
@@ -27,6 +27,13 @@ use mindustry_logic_bang_lang::{
     tag_code::TagCodes,
 };
 
+/// 带有错误前缀, 并且文本为红色的eprintln
+macro_rules! err {
+    ( $fmtter:expr $(, $args:expr)* $(,)? ) => {
+        eprintln!(concat!("\x1b[1;31m", "MainError: ", $fmtter, "\x1b[0m"), $($args),*);
+    };
+}
+
 macro_rules! concat_lines {
     ( $( $( $s:expr ),* ; )* ) => {
         concat!( $( $($s ,)* "\n" ),* )
@@ -41,6 +48,7 @@ pub const HELP_MSG: &str = concat_lines! {
     "MODE:";
     "\t", "c: compile MdtBangLang to MdtLogicCode";
     "\t", "a: compile MdtBangLang to AST Debug";
+    "\t", "A: compile MdtBangLang to MdtBangLang";
     "\t", "t: compile MdtBangLang to MdtTagCode";
     "\t", "T: compile MdtBangLang to MdtTagCode (Builded TagDown)";
     "\t", "f: compile MdtLogicCode to MdtTagCode";
@@ -82,6 +90,13 @@ fn main() {
             let ast = from_stdin_build_ast();
             println!("{:#?}", ast)
         },
+        "A" => {
+            let ast = from_stdin_build_ast();
+            let mut meta = Default::default();
+            ast.display_source(&mut meta);
+            assert!(meta.pop_lf());
+            println!("{}", meta.buffer());
+        },
         "t" => {
             let ast = from_stdin_build_ast();
             let meta = compile_ast(ast);
@@ -163,10 +178,13 @@ fn build_tag_down(meta: &mut CompileMeta) {
 type ParseResult<'a> = Result<Expand, ParseError<usize, Token<'a>, Error>>;
 
 fn from_stdin_build_ast() -> Expand {
+    build_ast(&read_stdin())
+}
+
+fn build_ast(src: &str) -> Expand {
     let parser = ExpandParser::new();
     let mut meta = Meta::new();
-    let buf = read_stdin();
-    unwrap_parse_err(parser.parse(&mut meta, &buf), &buf)
+    unwrap_parse_err(parser.parse(&mut meta, src), src)
 }
 
 fn read_stdin() -> String {