forked from lix-project/lix
b95a3dc45b
friends to do the parsing. The parse table is embedded in the Fix executable using bin2c, which converts an arbitrary file into a C character array.
164 lines
3.5 KiB
Plaintext
164 lines
3.5 KiB
Plaintext
definition
|
|
|
|
module Main
|
|
imports Fix
|
|
|
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%% Top level syntax.
|
|
|
|
module Fix
|
|
imports Fix-Exprs Fix-Layout
|
|
|
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%% Expressions.
|
|
|
|
module Fix-Exprs
|
|
imports Fix-Lexicals URI
|
|
exports
|
|
sorts Expr Bind
|
|
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}
|
|
|
|
"{" {Id ","}* "}" ":" Expr
|
|
-> Expr {cons("Function"), right}
|
|
|
|
"{" {Bind ","}+ "}"
|
|
-> Expr {cons("Attrs")}
|
|
|
|
Id "=" Expr
|
|
-> Bind {cons("Bind")}
|
|
|
|
"[" {Expr ","}* "]"
|
|
-> Expr {cons("List")}
|
|
|
|
context-free priorities
|
|
|
|
Expr Expr -> Expr
|
|
> "{" {Id ","}* "}" ":" Expr -> Expr
|
|
|
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%% Lexical syntax.
|
|
|
|
module Fix-Lexicals
|
|
exports
|
|
sorts Id Path
|
|
lexical syntax
|
|
[a-zA-Z\_][a-zA-Z0-9\_\']* -> Id
|
|
[0-9]+ -> Int
|
|
"\"" ~[\n\"]* "\"" -> Str
|
|
PathComp ("/" PathComp)+ -> Path
|
|
[a-zA-Z0-9\.\_\-]+ -> PathComp
|
|
lexical restrictions
|
|
Id -/- [a-zA-Z0-9\_\']
|
|
Int -/- [0-9]
|
|
|
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%% URIs (RFC 2396, appendix A).
|
|
|
|
module URI
|
|
exports
|
|
sorts Uri
|
|
lexical syntax
|
|
Uscheme ":" (Uhierpath | Uopaquepath) -> Uri
|
|
|
|
(Unetpath | Uabspath) ("?" Uquery)? -> Uhierpath
|
|
Uuricnoslash Uuric* -> Uopaquepath
|
|
|
|
Uunreserved | Uescaped | [\;\?\:\@\&\=\+\$\,] -> Uuricnoslash
|
|
|
|
"//" Uauthority Uabspath? -> Unetpath
|
|
"/" Upathsegments -> Uabspath
|
|
Urelsegment Uabspath? -> Urelpath
|
|
|
|
(Uunreserved | Uescaped | [\;\@\&\=\+\$\,])+ -> Urelsegment
|
|
|
|
Ualpha (Ualpha | Udigit | [\+\-\.])* -> Uscheme
|
|
|
|
Userver | Uregname -> Uauthority
|
|
|
|
(Uunreserved | Uescaped | [\$\,\;\:\@\&\=\+])+ -> Uregname
|
|
|
|
((Uuserinfo "@") Uhostport) -> Userver
|
|
(Uunreserved | Uescaped | [\;\:\&\=\+\$\,])* -> Uuserinfo
|
|
|
|
Uhost (":" Uport)? -> Uhostport
|
|
Uhostname | UIPv4address -> Uhost
|
|
(Udomainlabel ".")+ Utoplabel "."? -> Uhostname
|
|
Ualphanum | Ualphanum (Ualphanum | "-")* Ualphanum -> Udomainlabel
|
|
Ualpha | Ualpha (Ualphanum | "-")* Ualphanum -> Utoplabel
|
|
Udigit+ "." Udigit+ "." Udigit+ "." Udigit+ -> UIPv4address
|
|
Udigit* -> Uport
|
|
|
|
Uabspath | Uopaquepart -> Upath
|
|
Usegment ("/" Usegment)* -> Upathsegments
|
|
Upchar* (";" Uparam)* -> Usegment
|
|
Upchar* -> Uparam
|
|
Uunreserved | Uescaped | [\:\@\&\=\+\$\,] -> Upchar
|
|
|
|
Uuric* -> Uquery
|
|
|
|
Uuric* -> Ufragment
|
|
|
|
Ureserved | Uunreserved | Uescaped -> Uuric
|
|
[\;\/\?\:\@\&\=\+\$\,] -> Ureserved
|
|
Ualphanum | Umark -> Uunreserved
|
|
[\-\_\.\!\~\*\'\(\)] -> Umark
|
|
|
|
"%" Uhex Uhex -> Uescaped
|
|
Udigit | [A-Fa-f] -> Uhex
|
|
|
|
Ualpha | Udigit -> Ualphanum
|
|
Ulowalpha | Uupalpha -> Ualpha
|
|
|
|
[a-z] -> Ulowalpha
|
|
[A-Z] -> Uupalpha
|
|
[0-9] -> Udigit
|
|
|
|
lexical restrictions
|
|
Uri -/- [a-zA-Z0-9\-\_\.\!\~\*\'\(\)]
|
|
|
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%% Layout.
|
|
|
|
module Fix-Layout
|
|
exports
|
|
lexical syntax
|
|
[\ \t\n] -> LAYOUT
|
|
HashComment -> LAYOUT
|
|
Comment -> LAYOUT
|
|
"#" ~[\n]* [\n] -> HashComment
|
|
"//" ~[\n]* [\n] -> HashComment
|
|
"/*" ( ~[\*] | Asterisk )* "*/" -> Comment
|
|
[\*] -> Asterisk
|
|
lexical restrictions
|
|
Asterisk -/- [\/]
|
|
context-free restrictions
|
|
LAYOUT? -/- [\ \t\n] | [\#]
|
|
syntax
|
|
HashComment <START> -> <START>
|