Changeset 8 for grammer/test.grm

Timestamp:

Oct 15, 2007, 8:28:00 AM (17 years ago)

Author:

george

Message:

Opraveno: Vytváření nové gramatiky z jiné. Zobrazení výsledku a další fáze parsování pascalu.

File:

• grammer/test.grm (modified) (1 diff)

grammer/test.grm

@@ -1 @@
-ab1=bc | (s 'g') [{a}] .
+program = block '.' .
+block =  { declaration } statement .
+declaration = constant | variable | function .
+constant = CONST constant_definition { ',' constant_definition } ';' .
+constant_definition = NAME '=' NUMBER .
+variable = VAR NAME { ',' NAME } ';' .
+function = FUNCTION NAME '(' [ NAME { ',' NAME } ]  ')' block ';' .
+expression = [ ( '-' | '+' ) ] term { ( '-' | '+' ) term } .
+term = factor { ( '*' | '/' ) factor } .
+factor = NAME '(' [ expression { ',' expression } ] ')'
+  | NUMBER | NAME | '(' expression ')' .
+statement = [ NAME ':=' expression
+  | BEGIN statement { ';' statement } END
+  | IF condition THEN statement
+  | WHILE condition DO statement
+  | RETURN expression
+  | WRITE expression ] .
+condition = ODD expression
+  | expression ( '=' | '<>' | '<' | '<=' | '>' | '>=' ) expression .