diff --git a/doc/uml/lib/class.puml b/doc/uml/lib/class.puml
index c38476b..71743c4 100644
--- a/doc/uml/lib/class.puml
+++ b/doc/uml/lib/class.puml
@@ -1,9 +1,8 @@
 @startuml "bliplib class diagram"
 
+left to right direction
+
 package std {
-    interface Iterator<type Item> {
-        next(&mut self): Self::Item
-    }
     interface From<T> {
         from(value: T): Self
     }
@@ -14,39 +13,38 @@ package nom {
 }
 
 package parser {
-    struct TokenParser<I, T> {
-        phantom: PhantomData<I>
-        inner: T
-    }
-    note right of TokenParser {
-        where T: for<'i> nom::Parser<nom_locate::LocatedSpan<&'i I>, Output = Self, Error = nom::Err<nom::Error<nom_locate::LocatedSpan<&'i I>>>
-    }
+    interface TokenParser<I>
     interface Token {
-        apply(&self, context: Context): Context
+        -apply(&self, context: Context): Context
     }
     struct Silence {
-        parser<I>(): TokenParser<I, ??>
+        -parser<I>(): impl TokenParser<I>
     }
     struct Marker {
-        parser<I>(): impl for<'i> nom::Parser<nom_locate::LocatedSpan<&'i I>, Output = Self, Error = nom::Err<nom::Error<nom_locate::LocatedSpan<&'i I>>>
+        -parser<I>(): impl TokenParser<I>
     }
     struct Note {
-        n: u8
-        parser<I: nom::Input + nom::Compare<T>, T: nom::Input>(notes: Vec<T>): impl for<'i> nom::Parser<nom_locate::LocatedSpan<&'i I>, Output = Self, Error = nom::Err<nom::Error<nom_locate::LocatedSpan<&'i I>>>
+        +n: u8
+        -parser<'a, I: nom::Input + nom::Compare<I> + Clone>(notes: &'a [I]): impl TokenParser<I>
     }
     struct VariableChange {
-        name: char,
-        change: String
+        +name: char,
+        +change: String
+        -parser<'a, I, C: Into<char> + Clone>(variables: &'a [C]): impl TokenParser<I>
     }
     struct Loop {
-        times: usize
-        inner: Vec<Box<dyn Token>>
+        +times: usize
+        +inner: Vec<Box<dyn Token>>
+        -parser<'n, 's, 'v, I: Input + Clone + nom::Compare<I>, C: Into<char>>(parametters: ParserParametters<'n, 's, 'v, I, C>): impl TokenParser<I>
     }
     struct Tuplet {
-        inner: Vec<Box<dyn Token>>
+        +inner: Vec<Box<dyn Token>>
+        -parser<'n, 's, 'v, I: Input + Clone + nom::Compare<I>, C: Into<char>>(parametters: ParserParametters<'n, 's, 'v, I, C>): impl TokenParser<I>
     }
     struct Slope {
-        each_frame: VariableChange
+        +inner: Vec<Box<dyn Token>>
+        +each_frame: VariableChange
+        -parser<'n, 's, 'v, I: Input + Clone + nom::Compare<I>, C: Into<char>>(parametters: ParserParametters<'n, 's, 'v, I, C>): impl TokenParser<I>
     }
     Silence ..|> Token
     Marker ..|> Token
@@ -55,18 +53,35 @@ package parser {
     Loop ..|> Token
     Tuplet ..|> Token
     Slope ..|> Token
-    struct Parser<'i, 'n, 's, I: Input + Clone> {
-        input: &'i I
-        notes: &'n [I]
-        slopes: &'s HashMap<I, VariableChange>
+    Silence --> TokenParser
+    Marker --> TokenParser
+    Note --> TokenParser
+    VariableChange --> TokenParser
+    Loop --> TokenParser
+    Tuplet --> TokenParser
+    Slope --> TokenParser
+    struct ParserParametters<'n, 's, 'v, I: Input + Clone + nom::Compare<I>, C: Into<char>> {
+        +notes: &'n [I]
+        +slopes: &'s HashMap<I, VariableChange>
+        +variables: &'v [C]
     }
-    struct ParserBuilder<'i, 'n, 's, I: Input + Clone> {
-        input: Option<&'i I>
-        notes: Option<&'n [I]>
-        slopes: Option<&'s HashMap<I, String>>
-        input(self, input: &'i I): Self
-        notes(self, notes: &'n [I])
-        slopes(self, slopes: &'s HashMap<I, VariableChange>)
+    Loop --> ParserParametters
+    Tuplet --> ParserParametters
+    Slope --> ParserParametters
+    struct Parser<'i, 'n, 's, 'v, I: Input + Clone, C: Into<char>> {
+        -input: &'i I
+        -parametters: ParserParametters<'n, 's, 'v, I, C>
+        +parse_all(): Result<Vec<Box<dyn Token>>, nom::Error<nom_locate::LocatedSpan<&'i I>>>
+    }
+    struct ParserBuilder<'i, 'n, 's, 'v, I: Input + Clone, C: Into<char>> {
+        -input: Option<&'i I>
+        -notes: Option<&'n [I]>
+        -slopes: Option<&'s HashMap<I, VariableChange>>
+        -variables: Option<&'v [C]>
+        +input(self, input: &'i I): Self
+        +notes(self, notes: &'n [I]): Self
+        +slopes(self, slopes: &'s HashMap<I, VariableChange>): Self
+        +variables(self, variables: &'v [C]): Self
     }
     Token --> Parser
     Parser --> VariableChange
@@ -83,16 +98,15 @@ package compiler {
 
 interface "From<ParserBuilder>" as from_parserbuilder
 interface "nom::Parser<nom_locate::LocatedSpan<&'i I>>" as nomparser_locatedspan
-interface "From<T>" as from_t
 
 from_parserbuilder --> parser.ParserBuilder
+from_parserbuilder --> parser.ParserParametters
 from_parserbuilder --|> std.From
 nomparser_locatedspan --|> nom.Parser
-from_t --|> std.From
+parser.Parser --> nomparser_locatedspan
 parser.Parser ..|> from_parserbuilder
-parser.TokenParser ..|> nomparser_locatedspan: Output = T, Error = nom::Err<nom::Error<nom_locate::LocatedSpan<&'i I>
-parser.TokenParser ..|> from_t: where T: for<'i> nom::Parser<nom_locate::LocatedSpan<&'i I>, Output = Self, Error = nom::Err<nom::Error<nom_locate::LocatedSpan<&'i I>>>
-parser.Parser ..|> std.Iterator: Item = Result<Box<dyn Token>, nom::Error<nom_locate::LocatedSpan<&'i I>>>
+parser.TokenParser --|> nomparser_locatedspan: Output = Self, Error = nom::Err<nom::Error<nom_locate::LocatedSpan<&'i I>
+nomparser_locatedspan ..|> parser.TokenParser: for any T
 parser.Slope --> parser.VariableChange
 parser.Token --> compiler.Context