diff options
Diffstat (limited to 'doc/manual/nix-lang-ref.xml')
| -rw-r--r-- | doc/manual/nix-lang-ref.xml | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/doc/manual/nix-lang-ref.xml b/doc/manual/nix-lang-ref.xml new file mode 100644 index 000000000..19917144e --- /dev/null +++ b/doc/manual/nix-lang-ref.xml @@ -0,0 +1,183 @@ +<chapter> + <title>Nix Language Reference</title> + + <sect1> + <title>Grammar</title> + + <para> + </para> + + <productionset> + <title>Expressions</title> + + <production id="nix.expr"> + <lhs>Expr</lhs> + <rhs> + <nonterminal def="#nix.expr_function" /> + </rhs> + </production> + + <production id="nix.expr_function"> + <lhs>ExprFunction</lhs> + <rhs> + '{' <nonterminal def="#nix.formals" /> '}' ':' <nonterminal def="#nix.expr_function" /> + <sbr />| + <nonterminal def="#nix.expr_assert" /> + </rhs> + </production> + + <production id="nix.expr_assert"> + <lhs>ExprAssert</lhs> + <rhs> + 'assert' <nonterminal def="#nix.expr" /> ';' <nonterminal def="#nix.expr_assert" /> + <sbr />| + <nonterminal def="#nix.expr_if" /> + </rhs> + </production> + + <production id="nix.expr_if"> + <lhs>ExprIf</lhs> + <rhs> + 'if' <nonterminal def="#nix.expr" /> 'then' <nonterminal def="#nix.expr" /> + 'else' <nonterminal def="#nix.expr" /> + <sbr />| + <nonterminal def="#nix.expr_op" /> + </rhs> + </production> + + <production id="nix.expr_op"> + <lhs>ExprOp</lhs> + <rhs> + '!' <nonterminal def="#nix.expr_op" /> + <sbr />| + <nonterminal def="#nix.expr_op" /> '==' <nonterminal def="#nix.expr_op" /> + <sbr />| + <nonterminal def="#nix.expr_op" /> '!=' <nonterminal def="#nix.expr_op" /> + <sbr />| + <nonterminal def="#nix.expr_op" /> '&&' <nonterminal def="#nix.expr_op" /> + <sbr />| + <nonterminal def="#nix.expr_op" /> '||' <nonterminal def="#nix.expr_op" /> + <sbr />| + <nonterminal def="#nix.expr_op" /> '->' <nonterminal def="#nix.expr_op" /> + <sbr />| + <nonterminal def="#nix.expr_op" /> '//' <nonterminal def="#nix.expr_op" /> + <sbr />| + <nonterminal def="#nix.expr_op" /> '~' <nonterminal def="#nix.expr_op" /> + <sbr />| + <nonterminal def="#nix.expr_op" /> '?' <nonterminal def="#nix.id" /> + <sbr />| + <nonterminal def="#nix.expr_app" /> + </rhs> + </production> + + <production id="nix.expr_app"> + <lhs>ExprApp</lhs> + <rhs> + <nonterminal def="#nix.expr_app" /> '.' <nonterminal def="#nix.expr_select" /> + <sbr />| + <nonterminal def="#nix.expr_select" /> + </rhs> + </production> + + <production id="nix.expr_select"> + <lhs>ExprSelect</lhs> + <rhs> + <nonterminal def="#nix.expr_select" /> <nonterminal def="#nix.id" /> + <sbr />| + <nonterminal def="#nix.expr_simple" /> + </rhs> + </production> + + <production id="nix.expr_simple"> + <lhs>ExprSimple</lhs> + <rhs> + <nonterminal def="#nix.id" /> | + <nonterminal def="#nix.int" /> | + <nonterminal def="#nix.str" /> | + <nonterminal def="#nix.path" /> | + <nonterminal def="#nix.uri" /> + <sbr />| + '(' <nonterminal def="#nix.expr" /> ')' + <sbr />| + '{' <nonterminal def="#nix.bind" />* '}' + <sbr />| + 'let' '{' <nonterminal def="#nix.bind" />* '}' + <sbr />| + 'rec' '{' <nonterminal def="#nix.bind" />* '}' + <sbr />| + '[' <nonterminal def="#nix.expr_select" />* ']' + </rhs> + </production> + + <production id="nix.bind"> + <lhs>Bind</lhs> + <rhs> + <nonterminal def="#nix.id" /> '=' <nonterminal def="#nix.expr" /> ';' + <sbr />| + 'inherit' ('(' <nonterminal def="#nix.expr" /> ')')? <nonterminal def="#nix.id" />* ';' + </rhs> + </production> + + <production id="nix.formals"> + <lhs>Formals</lhs> + <rhs> + <nonterminal def="#nix.formal" /> ',' <nonterminal def="#nix.formals" /> + | <nonterminal def="#nix.formal" /> + </rhs> + </production> + + <production id="nix.formal"> + <lhs>Formal</lhs> + <rhs> + <nonterminal def="#nix.id" /> + <sbr />| + <nonterminal def="#nix.id" /> '?' <nonterminal def="#nix.expr" /> + </rhs> + </production> + + </productionset> + + <productionset> + <title>Terminals</title> + + <production id="nix.id"> + <lhs>Id</lhs> + <rhs>[a-zA-Z\_][a-zA-Z0-9\_\']*</rhs> + </production> + + <production id="nix.int"> + <lhs>Int</lhs> + <rhs>[0-9]+</rhs> + </production> + + <production id="nix.str"> + <lhs>Str</lhs> + <rhs>\"[^\n\"]*\"</rhs> + </production> + + <production id="nix.path"> + <lhs>Path</lhs> + <rhs>[a-zA-Z0-9\.\_\-\+]*(\/[a-zA-Z0-9\.\_\-\+]+)+</rhs> + </production> + + <production id="nix.uri"> + <lhs>Uri</lhs> + <rhs>[a-zA-Z][a-zA-Z0-9\+\-\.]*\:[a-zA-Z0-9\%\/\?\:\@\&\=\+\$\,\-\_\.\!\~\*\']+</rhs> + </production> + + <production id="nix.ws"> + <lhs>Whitespace</lhs> + <rhs> + [ \t\n]+ + <sbr />| + \#[^\n]* + <sbr />| + \/\*(.|\n)*\*\/ + </rhs> + </production> + + </productionset> + + </sect1> + +</chapter>
\ No newline at end of file |