update backcall operator syntax, fix issue #31.

1 files changed, 5 insertions, 3 deletions

diff --git a/src/MoonP/moon_parser.cpp b/src/MoonP/moon_parser.cpp
index 63ffec7..f15492f 100644
--- a/src/MoonP/moon_parser.cpp
+++ b/src/MoonP/moon_parser.cpp
@@ -319,7 +319,7 @@ MoonParser::MoonParser() {
         unary_exp = *(Space >> unary_operator) >> expo_exp;
 
         BackcallOperator = expr("|>");
-        backcall_value = White >> BackcallOperator >> *SpaceBreak >> unary_exp;
+        backcall_value = Space >> BackcallOperator >> *SpaceBreak >> unary_exp;
         backcall_exp = unary_exp >> *backcall_value;
 
         BinaryOperator =
@@ -522,6 +522,8 @@ MoonParser::MoonParser() {
         fn_arrow_back = expr('<') >> set("-=");
         Backcall = -FnArgsDef >> Space >> fn_arrow_back >> Space >> ChainValue;
 
+        BackcallBody = Seperator >> Space >> BackcallOperator >> unary_exp >> *(+SpaceBreak >> CheckIndent >> Space >> BackcallOperator >> unary_exp);
+
         ExpList = Seperator >> Exp >> *(sym(',') >> Exp);
         ExpListLow = Seperator >> Exp >> *(Space >> set(",;") >> Exp);
 
@@ -562,14 +564,14 @@ MoonParser::MoonParser() {
                 Import | While | Repeat | For | ForEach |
                 Return | Local | Global | Export | Macro |
                 Space >> BreakLoop | Label | Goto | Backcall |
-                LocalAttrib | ExpListAssign
+                LocalAttrib | BackcallBody | ExpListAssign
         ) >> Space >>
         -statement_appendix >> -statement_sep;
 
         Body = Space >> Break >> *EmptyLine >> InBlock | Statement;
 
         empty_line_stop = Space >> and_(Stop);
-        Line = CheckIndent >> Statement | empty_line_stop;
+        Line = CheckIndent >> Statement | and_(Space >> BackcallOperator) >> Advance >> ensure(Statement, PopIndent) | empty_line_stop;
         Block = Seperator >> Line >> *(+Break >> Line);
 
         Shebang = expr("#!") >> *(not_(Stop) >> Any);