* Replaced the SDF parser by a substantially faster Bison/Flex

  parser (roughly 80x faster).

  The absolutely latest version of Bison (1.875c) is required for
  reentrant GLR support, as well as a recent version of Flex (say,
  2.5.31).  Note that most Unix distributions ship with the
  prehistoric Flex 2.5.4, which doesn't support reentrancy.

1 files changed, 0 insertions, 131 deletions

diff --git a/src/libexpr/nix.sdf b/src/libexpr/nix.sdf
deleted file mode 100644
index 36fbef39cb..0000000000
--- a/src/libexpr/nix.sdf
+++ /dev/null
@@ -1,131 +0,0 @@
-definition
-
-module Main
-imports Fix
-
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%% Top level syntax.
-
-module Fix
-imports Fix-Exprs Fix-Layout
-
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%% Expressions.
-
-module Fix-Exprs
-imports Fix-Lexicals
-exports
-  sorts Expr Formal Bind Binds ExprList
-  context-free syntax
-
-    Id -> Expr {cons("Var")}
-
-    Int -> Expr {cons("Int")}
-
-    Str -> Expr {cons("Str")}
-
-    Uri -> Expr {cons("Uri")}
-
-    Path -> Expr {cons("Path")}
-
-    "(" Expr ")" -> Expr {bracket}
-
-    Expr Expr -> Expr {cons("Call"), left}
-
-    "{" {Formal ","}* "}" ":" Expr -> Expr {cons("Function")}
-    Id -> Formal {cons("NoDefFormal")}
-    Id "?" Expr -> Formal {cons("DefFormal")}
-
-    "assert" Expr ";" Expr -> Expr {cons("Assert")}
-
-    "rec" "{" Binds "}" -> Expr {cons("Rec")}
-    "let" "{" Binds "}" -> Expr {cons("LetRec")}
-    "{" Binds "}" -> Expr {cons("Attrs")}
-
-    Bind* -> Binds
-    Id "=" Expr ";" -> Bind {cons("Bind")}
-
-    "[" ExprList "]" -> Expr {cons("List")}
-    "" -> ExprList {cons("ExprNil")}
-    Expr ExprList -> ExprList {cons("ExprCons")}
-
-    Expr "." Id -> Expr {cons("Select")}
-
-    "if" Expr "then" Expr "else" Expr -> Expr {cons("If")}
-
-    Expr "==" Expr -> Expr {cons("OpEq"), non-assoc}
-    Expr "!=" Expr -> Expr {cons("OpNEq"), non-assoc}
-
-    "!" Expr -> Expr {cons("OpNot")}
-    Expr "&&" Expr -> Expr {cons("OpAnd"), right}
-    Expr "||" Expr -> Expr {cons("OpOr"), right}
-    Expr "->" Expr -> Expr {cons("OpImpl"), right}
-
-  context-free priorities
-
-    Expr "." Id -> Expr
-  > Expr ExprList -> ExprList
-  > Expr Expr -> Expr
-  > "!" Expr -> Expr
-  > Expr "==" Expr -> Expr
-  > Expr "!=" Expr -> Expr
-  > Expr "&&" Expr -> Expr
-  > Expr "||" Expr -> Expr
-  > Expr "->" Expr -> Expr
-  > "assert" Expr ";" Expr -> Expr
-  > "{" {Formal ","}* "}" ":" Expr -> Expr
-
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%% Lexical syntax.
-
-module Fix-Lexicals
-exports
-  sorts Id Int Str Path PathComp Uri
-  lexical syntax
-    [a-zA-Z\_][a-zA-Z0-9\_\']* -> Id
-    "rec" -> Id {reject}
-    "let" -> Id {reject}
-    "if" -> Id {reject}
-    "then" -> Id {reject}
-    "else" -> Id {reject}
-    "assert" -> Id {reject}
-
-    [0-9]+ -> Int
-
-    "\"" ~[\n\"]* "\"" -> Str
-
-    "." ("/" PathComp)+ -> Path
-    ".." ("/" PathComp)+ -> Path
-    ("/" PathComp)+ -> Path
-    [a-zA-Z0-9\.\_\-\+]+ -> PathComp
-
-    [a-zA-Z] [a-zA-Z0-9\+\-\.]* ":" [a-zA-Z0-9\%\/\?\:\@\&\=\+\$\,\-\_\.\!\~\*\']* -> Uri
-
-  lexical restrictions
-    Id -/- [a-zA-Z0-9\_\']
-    Int -/- [0-9]
-    Path -/- [a-zA-Z0-9\.\_\-\+\/]
-    Uri -/- [a-zA-Z0-9\%\/\?\:\@\&\=\+\$\,\-\_\.\!\~\*\']
-
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%% Layout.
-
-module Fix-Layout
-exports
-  sorts HashComment Asterisk Comment
-  lexical syntax
-    [\ \t\n] -> LAYOUT
-    HashComment -> LAYOUT
-    Comment -> LAYOUT
-    "#" ~[\n]* -> HashComment
-    "/*" ( ~[\*] | Asterisk )* "*/" -> Comment
-    [\*] -> Asterisk
-  lexical restrictions
-    Asterisk -/- [\/]
-    HashComment -/- ~[\n]
-  context-free restrictions
-    LAYOUT? -/- [\ \t\n]