Commit: master - regiux (git)

A fast implementation of the Nix expression language

Commit MetaInfo

• Révision: 376831c93fc2872a6134b52fd5bec158805e195f (tree)
• l'heure: 2024-06-10 07:57:27
• Auteur: Corbin <cds@corb...>
• Commiter: Corbin

Message de Log

parser: Add weird let-expression and rec-expression.

Change Summary

• modified: parser.py

Modification

--- a/parser.py
+++ b/parser.py
@@ -295,6 +295,14 @@ class WithBox(BaseBox):
         self.expr = expr
     def pretty(self): return "with %s; %s" % (self.scope.pretty(), self.expr.pretty())
 
+class WeirdLetBox(BaseBox):
+    def __init__(self, binds): self.binds = binds
+    def pretty(self): return "let " + self.binds.pretty()
+
+class RecBox(BaseBox):
+    def __init__(self, binds): self.binds = binds
+    def pretty(self): return "rec " + self.binds.pretty()
+
 class LambdaBox(BaseBox):
     def __init__(self, binding, params, body):
         self.binding = binding
@@ -444,6 +452,12 @@ def stringQLEnd(p): return IncompleteQL([(p[0], trimBox(p[1], 1, -1))])
 @pg.production("expr_simple : URI")
 def exprURI(p): return StrBox(p[0].getstr())
 
[e-mail]("expr_simple : LET OPEN_BRACE binds CLOSE_BRACE")
+def exprWeirdLet(p): return WeirdLetBox(p[2])
+
[e-mail]("expr_simple : REC OPEN_BRACE binds CLOSE_BRACE")
+def exprRec(p): return RecBox(p[2])
+
 enclosedRule("expr_simple : OPEN_BRACE binds CLOSE_BRACE", 1)
 enclosedRule("expr_simple : OPEN_PAREN expr CLOSE_PAREN", 1)
 enclosedRule("expr_simple : OPEN_BRACK expr_list CLOSE_BRACK", 1)