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* @-patterns as in Haskell. For instance, in a function definition

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f = args @ {x, y, z}: ...;

  `args' refers to the argument as a whole, which is further
  pattern-matched against the attribute set pattern {x, y, z}.
This commit is contained in:
Eelco Dolstra
2008-08-14 12:53:29 +00:00
parent e818838412
commit 1b962fc720
10 changed files with 106 additions and 46 deletions
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src/libexpr/expr-to-xml.cc
+8 -2
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@@ -40,10 +40,11 @@ static void showAttrs(const ATermMap & attrs, XMLWriter & doc,
}
static void printPatternAsXML(Pattern pat, XMLWriter & doc, PathSet & context)
static void printPatternAsXML(Pattern pat, XMLWriter & doc)
{
ATerm name;
ATermList formals;
Pattern pat1, pat2;
if (matchVarPat(pat, name))
doc.writeEmptyElement("varpat", singletonAttrs("name", aterm2String(name)));
else if (matchAttrsPat(pat, formals)) {
@@ -54,6 +55,11 @@ static void printPatternAsXML(Pattern pat, XMLWriter & doc, PathSet & context)
doc.writeEmptyElement("attr", singletonAttrs("name", aterm2String(name)));
}
}
else if (matchAtPat(pat, pat1, pat2)) {
XMLOpenElement _(doc, "at");
printPatternAsXML(pat1, doc);
printPatternAsXML(pat2, doc);
}
}
@@ -128,7 +134,7 @@ static void printTermAsXML(Expr e, XMLWriter & doc, PathSet & context,
else if (matchFunction(e, pat, body, pos)) {
XMLOpenElement _(doc, "function");
printPatternAsXML(pat, doc, context);
printPatternAsXML(pat, doc);
}
else