Commit 783d8764ca700639b5201af3212f854b42375a22 - SixtyPical

Attempt to bring the grammar up to date. Chris Pressey 4 years ago

1 changed file(s) with 14 addition(s) and 3 deletion(s). Raw diff Collapse all Expand all

+14

-3

doc/SixtyPical.md less more

500	500	Grammar
501	501	-------
502	502
503		Program ::= {Defn} {Routine}.
	503	Program ::= {TypeDefn} {Defn} {Routine}.
	504	TypeDefn::= "typedef" Type Ident<new>.
504	505	Defn ::= Type Ident<new> [Constraints] (":" Literal \| "@" LitWord).
505		Type ::= "byte" ["table"] \| "vector"
	506	Type ::= "(" Type ")" \| TypeExpr ["table" TypeSize].
	507	TypeExpr::= "byte"
	508	\| "word"
	509	\| "buffer" TypeSize
	510	\| "pointer"
	511	\| "vector" Type
	512	\| "routine" Constraints
	513	.
	514	TypeSize::= "[" LitWord "]".
506	515	Constrnt::= ["inputs" LocExprs] ["outputs" LocExprs] ["trashes" LocExprs].
507		Routine ::= "routine" Ident<new> Constraints (Block \| "@" LitWord).
	516	Routine ::= "define" Ident<new> Type (Block \| "@" LitWord).
	517	\| "routine" Ident<new> Constraints (Block \| "@" LitWord)
	518	.
508	519	LocExprs::= LocExpr {"," LocExpr}.
509	520	LocExpr ::= Register \| Flag \| Literal \| Ident.
510	521	Register::= "a" \| "x" \| "y".