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basic: parser goes parrrrrr

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minjaesong
2020-12-11 22:51:16 +09:00
parent 01e45c7ebc
commit 91a4cb0049
2 changed files with 121 additions and 64 deletions
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15
assets/tbas/syntax.txt
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@@ -2,22 +2,25 @@ line = linenumber , stmt , {":" , stmt} ;
linenumber = digits ;
stmt =
"IF" , if_equation , "THEN" , stmt , ["ELSE" , stmt]
if_stmt //TODO
| "DEFUN" , [ident] , "(" , [ident , {" , " , ident}] , ")" , "=" , stmt
| "ON" , if_equation , ident , if_equation , {"," , if_equation}
| "(" , stmt , ")"
| function_call ;
if_stmt = "IF" , if_equation , "THEN" , stmt , ["ELSE" , stmt] ; //TODO
function_call =
equation
| ident , "(" , [function_call , {argsep , function_call} , [argsep]] , ")"
| ident , function_call , {argsep , function_call} , [argsep] ;
if_stmt //TODO
| equation ;
| ident , "(" , [stmt , {argsep , stmt} , [argsep]] , ")"
| ident , stmt , {argsep , stmt} , [argsep]
equation =
lit
| "(" , equation , ")"
| equation , op , equation
| op_uni , equation ;
| function_call , op , function_call
| op_uni , function_call ;
if_equation = if_equation , op - ("=") , if_equation
| op_uni , if_equation