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Javascript parser now works on token sequence

db4
Chris Double 2008-06-17 23:42:28 +12:00
parent 258951d954
commit 4050ebcbde
2 changed files with 9 additions and 59 deletions
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2
extra/peg/ebnf/ebnf.factor
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@ -410,7 +410,7 @@ M: ebnf-var (transform) ( ast -- parser )
parser>> (transform) ;
M: ebnf-terminal (transform) ( ast -- parser )
symbol>> token ;
symbol>> [ token ] keep [ = ] curry satisfy 2choice ;
M: ebnf-foreign (transform) ( ast -- parser )
dup word>> search

66
extra/peg/javascript/javascript.factor
View File

@ -1,7 +1,7 @@
! Copyright (C) 2007 Chris Double.
! See http://factorcode.org/license.txt for BSD license.
USING: kernel arrays strings math.parser sequences sequences.deep
peg peg.ebnf peg.parsers memoize namespaces math ;
peg peg.ebnf peg.parsers memoize namespaces math accessors ;
IN: peg.javascript
#! Grammar for JavaScript. Based on OMeta-JS example from:
@ -81,7 +81,7 @@ Keyword = ("break"
| "var"
| "void"
| "while"
| "with") => [[ ast-keyword boa ]]
| "with")
Name = !(Keyword) (iName):n => [[ n ast-name boa ]]
Number = Digits:ws '.' Digits:fs => [[ ws "." fs 3array concat >string string>number ast-number boa ]]
| Digits => [[ >string string>number ast-number boa ]]
@ -105,61 +105,11 @@ Toks = (Tok)* Spaces
;EBNF
EBNF: javascript
Letter = [a-zA-Z]
Digit = [0-9]
Digits = (Digit)+
SingleLineComment = "//" (!("\n") .)* "\n" => [[ ignore ]]
MultiLineComment = "/*" (!("*/") .)* "*/" => [[ ignore ]]
Space = " " | "\t" | "\n" | SingleLineComment | MultiLineComment
Space = " " | "\t" | "\n"
Spaces = (Space)* => [[ ignore ]]
NameFirst = Letter | "$" | "_"
NameRest = NameFirst | Digit
iName = NameFirst (NameRest)* => [[ first2 swap prefix >string ]]
Keyword = ("break"
| "case"
| "catch"
| "continue"
| "default"
| "delete"
| "do"
| "else"
| "finally"
| "for"
| "function"
| "if"
| "in"
| "instanceof"
| "new"
| "return"
| "switch"
| "this"
| "throw"
| "try"
| "typeof"
| "var"
| "void"
| "while"
| "with") => [[ ast-keyword boa ]]
Name = !(Keyword) (iName):n => [[ n ast-name boa ]]
Number = Digits:ws '.' Digits:fs => [[ ws "." fs 3array concat >string string>number ast-number boa ]]
| Digits => [[ >string string>number ast-number boa ]]
EscapeChar = "\\n" => [[ 10 ]]
| "\\r" => [[ 13 ]]
| "\\t" => [[ 9 ]]
StringChars1 = (EscapeChar | !('"""') .)* => [[ >string ]]
StringChars2 = (EscapeChar | !('"') .)* => [[ >string ]]
StringChars3 = (EscapeChar | !("'") .)* => [[ >string ]]
Str = '"""' StringChars1:cs '"""' => [[ cs ast-string boa ]]
| '"' StringChars2:cs '"' => [[ cs ast-string boa ]]
| "'" StringChars3:cs "'" => [[ cs ast-string boa ]]
Special = "(" | ")" | "{" | "}" | "[" | "]" | "," | ";"
| "?" | ":" | "!==" | "~=" | "===" | "==" | "=" | ">="
| ">" | "<=" | "<" | "++" | "+=" | "+" | "--" | "-="
| "-" | "*=" | "*" | "/=" | "/" | "%=" | "%" | "&&="
| "&&" | "||=" | "||" | "." | "!"
Tok = Spaces (Name | Keyword | Number | Str | Special )
Toks = (Tok)* Spaces
Name = . ?[ ast-name? ]? => [[ value>> ]]
Number = . ?[ ast-number? ]? => [[ value>> ]]
String = . ?[ ast-string? ]? => [[ value>> ]]
SpacesNoNl = (!("\n") Space)* => [[ ignore ]]
Expr = OrExpr:e "?" Expr:t ":" Expr:f => [[ e t f ast-cond-expr boa ]]
@ -214,7 +164,7 @@ PrimExprHd = "(" Expr:e ")" => [[ e ]]
| "this" => [[ ast-this boa ]]
| Name => [[ ast-get boa ]]
| Number => [[ ast-number boa ]]
| Str => [[ ast-string boa ]]
| String => [[ ast-string boa ]]
| "function" FuncRest:fr => [[ fr ]]
| "new" Name:n "(" Args:as ")" => [[ n as ast-new boa ]]
| "[" Args:es "]" => [[ es ast-array boa ]]
@ -222,7 +172,7 @@ PrimExprHd = "(" Expr:e ")" => [[ e ]]
JsonBindings = JsonBinding ("," JsonBinding)* => [[ first2 swap prefix ]]
Json = "{" JsonBindings:bs "}" => [[ bs ast-json boa ]]
JsonBinding = JsonPropName:n ":" Expr:v => [[ n v ast-binding boa ]]
JsonPropName = Name | Number | Str
JsonPropName = Name | Number | String
Formal = Spaces Name
Formals = Formal ("," Formal)* => [[ first2 swap prefix ]]
FuncRest = "(" Formals:fs ")" "{" SrcElems:body "}" => [[ fs body ast-func boa ]]