curioustorvald/tsvm
1
0
Fork 0
mirror of https://github.com/curioustorvald/tsvm.git synced 2026-06-10 15:04:03 +09:00
Code Issues Packages Projects Releases Wiki Activity

basic: yet more parser wip

Browse Source
This commit is contained in:
minjaesong
2020-12-11 11:41:18 +09:00
parent 401bb47481
commit 833a8df07b
3 changed files with 274 additions and 106 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
assets/tbas/syntax.txt
View File

@@ -3,31 +3,32 @@ linenumber = digits ;
stmt =
"IF" , if_equation , "THEN" , stmt , ["ELSE" , stmt]
| "DEFUN" , [lit] , "(" , [lit , {" , " , lit}] , ")" , "=" , stmt
| "ON" , lit , lit , equation , {"," , equation}
| function_call
| "(" , stmt , ")" ;
| "DEFUN" , [ident] , "(" , [ident , {" , " , ident}] , ")" , "=" , stmt
| "ON" , ident , ident , equation , {"," , equation}
| "(" , stmt , ")"
| function_call ;
function_call =
lit
| lit , function_call , {argsep , function_call}
| lit , "(" , [function_call , {argsep , function_call}] , ")"
| equation
equation
| ident , "(" , [function_call , {argsep , function_call} , [argsep]] , ")"
| ident , function_call , {argsep , function_call} , [argsep] ;
equation = equation , op , equation
| op_uni , equation
| lit
equation =
lit
| "(" , equation , ")"
| equation , op , equation
| op_uni , equation ;
if_equation = if_equation , op - ("=") , if_equation
| op_uni , if_equation
| lit
| "(" , if_equation , ")"
| "(" , if_equation , ")" ;
(* don't bother looking at these, because you already know the stuff *)
function = lit ;
argsep = ","|";" ;
ident = alph , [digits] ;
lit = alph , [digits] | num | string ; (* example: "MyVar_2" *)
op = "^" | "*" | "/" | "MOD" | "+" | "-" | "<<" | ">>" | "<" | ">" | "<="
| "=<" | ">=" | "=>" | "==" | "<>" | "><" | "BAND" | "BXOR" | "BOR"
@@ -61,22 +62,26 @@ bindigit = "0" | "1" ;
(* all possible token states: lit num op bool qot paren sep *)
IF
IF (type: function, value: IF)
1. cond
2. true
[3. false]
DEFUN
DEFUN (type: function, value: DEFUN)
1. funcname
1. arg0
[2. arg1]
[3. argN...]
2. stmt
ON
ON (type: function, value: ON)
1. varname
2. functionname
3. arg0
[4. arg1]
[5. argN...]
FUNCTION_CALL (type: function, value: PRINT or something)
1. arg0
2. arg1
[3. argN...]