* Simplify @-patterns: only {attrs}@name' or name@{attrs}' are now
allowed. So `name1@name2', `{attrs1}@{attrs2}' and so on are now no
longer legal. This is no big loss because they were not useful
anyway.
This also changes the output of builtins.toXML for @-patterns
slightly.
This commit is contained in:
Eelco Dolstra
parent
7482349fe8
commit
8a10360c91
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@ -111,91 +111,6 @@ Env * allocEnv()
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}
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static bool patternIsStrict(Pattern pat)
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{
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ATerm name, ellipsis, pat1, pat2;
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ATermList formals;
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if (matchVarPat(pat, name)) return false;
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else if (matchAttrsPat(pat, formals, ellipsis)) return true;
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else if (matchAtPat(pat, pat1, pat2))
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return patternIsStrict(pat1) || patternIsStrict(pat2);
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else abort();
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}
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static void bindVarPats(Pattern pat, Env & newEnv,
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Env * argEnv, Expr argExpr, Value * & vArg)
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{
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Pattern pat1, pat2;
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if (matchAtPat(pat, pat1, pat2)) {
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bindVarPats(pat1, newEnv, argEnv, argExpr, vArg);
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bindVarPats(pat2, newEnv, argEnv, argExpr, vArg);
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return;
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}
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ATerm name;
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if (!matchVarPat(pat, name)) abort();
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if (vArg) {
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Value & v = newEnv.bindings[aterm2String(name)];
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v.type = tCopy;
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v.val = vArg;
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} else {
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vArg = &newEnv.bindings[aterm2String(name)];
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vArg->type = tThunk;
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vArg->thunk.env = argEnv;
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vArg->thunk.expr = argExpr;
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}
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}
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static void bindAttrPats(Pattern pat, Env & newEnv,
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Value & vArg, Value * & vArgInEnv)
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{
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Pattern pat1, pat2;
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if (matchAtPat(pat, pat1, pat2)) {
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bindAttrPats(pat1, newEnv, vArg, vArgInEnv);
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bindAttrPats(pat2, newEnv, vArg, vArgInEnv);
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return;
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}
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ATerm name;
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if (matchVarPat(pat, name)) {
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if (vArgInEnv) {
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Value & v = newEnv.bindings[aterm2String(name)];
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v.type = tCopy;
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v.val = vArgInEnv;
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} else {
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vArgInEnv = &newEnv.bindings[aterm2String(name)];
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*vArgInEnv = vArg;
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}
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return;
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}
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ATerm ellipsis;
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ATermList formals;
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if (matchAttrsPat(pat, formals, ellipsis)) {
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for (ATermIterator i(formals); i; ++i) {
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Expr name, def;
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DefaultValue def2;
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if (!matchFormal(*i, name, def2)) abort(); /* can't happen */
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Bindings::iterator j = vArg.attrs->find(aterm2String(name));
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if (j == vArg.attrs->end())
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throw TypeError(format("the argument named `%1%' required by the function is missing")
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% aterm2String(name));
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Value & v = newEnv.bindings[aterm2String(name)];
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v.type = tCopy;
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v.val = &j->second;
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}
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return;
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}
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abort();
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}
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static void eval(Env * env, Expr e, Value & v)
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{
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printMsg(lvlError, format("eval: %1%") % e);
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@ -279,17 +194,45 @@ static void eval(Env * env, Expr e, Value & v)
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Env * env2 = allocEnv();
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env2->up = env;
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if (patternIsStrict(v.lambda.pat)) {
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Value vArg;
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eval(env, arg, vArg);
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if (vArg.type != tAttrs) throw TypeError("expected attribute set");
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Value * vArg2 = 0;
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bindAttrPats(v.lambda.pat, *env2, vArg, vArg2);
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} else {
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Value * vArg = 0;
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bindVarPats(v.lambda.pat, *env2, env, arg, vArg);
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ATermList formals; ATerm ellipsis;
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if (matchVarPat(v.lambda.pat, name)) {
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Value & vArg = env2->bindings[aterm2String(name)];
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vArg.type = tThunk;
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vArg.thunk.env = env;
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vArg.thunk.expr = arg;
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}
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else if (matchAttrsPat(v.lambda.pat, formals, ellipsis, name)) {
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Value * vArg;
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Value vArg_;
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if (name == sNoAlias)
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vArg = &vArg_;
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else
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vArg = &env2->bindings[aterm2String(name)];
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eval(env, arg, *vArg);
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if (vArg->type != tAttrs) throw TypeError("expected attribute set");
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for (ATermIterator i(formals); i; ++i) {
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Expr name, def;
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DefaultValue def2;
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if (!matchFormal(*i, name, def2)) abort(); /* can't happen */
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Bindings::iterator j = vArg->attrs->find(aterm2String(name));
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if (j == vArg->attrs->end())
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throw TypeError(format("the argument named `%1%' required by the function is missing")
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% aterm2String(name));
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Value & v = env2->bindings[aterm2String(name)];
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v.type = tCopy;
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v.val = &j->second;
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}
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}
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else abort();
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eval(env2, v.lambda.body, v);
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return;
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}
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@ -319,13 +262,10 @@ void run(Strings args)
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doTest("rec { x = 1; y = x; }.y");
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doTest("(x: x) 1");
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doTest("(x: y: y) 1 2");
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doTest("(x@y: x) 1");
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doTest("(x@y: y) 2");
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doTest("(x@y@z: y) 3");
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doTest("x: x");
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doTest("({x, y}: x) { x = 1; y = 2; }");
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doTest("({x, y}@args: args.x) { x = 1; y = 2; }");
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doTest("({x, y}@args@args2: args2.x) { x = 1; y = 2; }");
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doTest("(args@{x, y}: args.x) { x = 1; y = 2; }");
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//Expr e = parseExprFromString(state, "let x = \"a\"; in x + \"b\"", "/");
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//Expr e = parseExprFromString(state, "(x: x + \"b\") \"a\"", "/");
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@ -85,16 +85,17 @@ static void patternMatch(EvalState & state,
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{
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ATerm name;
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ATermList formals;
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Pattern pat1, pat2;
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ATermBool ellipsis;
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if (matchVarPat(pat, name))
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subs.set(name, arg);
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else if (matchAttrsPat(pat, formals, ellipsis)) {
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else if (matchAttrsPat(pat, formals, ellipsis, name)) {
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arg = evalExpr(state, arg);
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if (name != sNoAlias) subs.set(name, arg);
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/* Get the actual arguments. */
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ATermMap attrs;
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queryAllAttrs(arg, attrs);
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@ -131,11 +132,6 @@ static void patternMatch(EvalState & state,
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% aterm2String(attrs.begin()->key));
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}
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else if (matchAtPat(pat, pat1, pat2)) {
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patternMatch(state, pat1, arg, subs, subsRecursive);
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patternMatch(state, pat2, arg, subs, subsRecursive);
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}
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else abort();
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}
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@ -425,12 +421,11 @@ Path coerceToPath(EvalState & state, Expr e, PathSet & context)
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Expr autoCallFunction(Expr e, const ATermMap & args)
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{
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Pattern pat;
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ATerm body, pos;
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ATerm body, pos, name;
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ATermList formals;
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ATermBool ellipsis;
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/* !!! this should be more general */
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if (matchFunction(e, pat, body, pos) && matchAttrsPat(pat, formals, ellipsis)) {
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if (matchFunction(e, pat, body, pos) && matchAttrsPat(pat, formals, ellipsis, name)) {
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ATermMap actualArgs(ATgetLength(formals));
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for (ATermIterator i(formals); i; ++i) {
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@ -44,23 +44,19 @@ static void printPatternAsXML(Pattern pat, XMLWriter & doc)
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{
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ATerm name;
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ATermList formals;
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Pattern pat1, pat2;
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ATermBool ellipsis;
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if (matchVarPat(pat, name))
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doc.writeEmptyElement("varpat", singletonAttrs("name", aterm2String(name)));
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else if (matchAttrsPat(pat, formals, ellipsis)) {
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XMLOpenElement _(doc, "attrspat");
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else if (matchAttrsPat(pat, formals, ellipsis, name)) {
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XMLAttrs attrs;
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if (name != sNoAlias) attrs["name"] = aterm2String(name);
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if (ellipsis == eTrue) attrs["ellipsis"] = "1";
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XMLOpenElement _(doc, "attrspat", attrs);
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for (ATermIterator i(formals); i; ++i) {
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Expr name; ATerm dummy;
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if (!matchFormal(*i, name, dummy)) abort();
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doc.writeEmptyElement("attr", singletonAttrs("name", aterm2String(name)));
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}
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if (ellipsis == eTrue) doc.writeEmptyElement("ellipsis");
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}
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else if (matchAtPat(pat, pat1, pat2)) {
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XMLOpenElement _(doc, "at");
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printPatternAsXML(pat1, doc);
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printPatternAsXML(pat2, doc);
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}
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}
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@ -77,8 +77,7 @@ Inherit | Expr ATermList Pos | ATerm |
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Scope | | Expr |
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VarPat | string | Pattern |
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AttrsPat | ATermList ATermBool | Pattern | # bool = `...'
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AtPat | Pattern Pattern | Pattern |
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AttrsPat | ATermList ATermBool string | Pattern | # bool = `...'
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Formal | string DefaultValue | ATerm |
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@ -95,3 +94,4 @@ AttrRHS | Expr Pos | ATerm |
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eTrue = makeBool(makeTrue())
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eFalse = makeBool(makeFalse())
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sOverrides = toATerm("__overrides")
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sNoAlias = toATerm("")
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@ -114,23 +114,19 @@ static void varsBoundByPattern(ATermMap & map, Pattern pat)
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{
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ATerm name;
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ATermList formals;
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Pattern pat1, pat2;
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ATermBool ellipsis;
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/* Use makeRemoved() so that it can be used directly in
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substitute(). */
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if (matchVarPat(pat, name))
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map.set(name, makeRemoved());
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else if (matchAttrsPat(pat, formals, ellipsis)) {
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else if (matchAttrsPat(pat, formals, ellipsis, name)) {
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if (name != sNoAlias) map.set(name, makeRemoved());
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for (ATermIterator i(formals); i; ++i) {
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ATerm d1;
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if (!matchFormal(*i, name, d1)) abort();
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map.set(name, makeRemoved());
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}
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}
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else if (matchAtPat(pat, pat1, pat2)) {
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varsBoundByPattern(map, pat1);
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varsBoundByPattern(map, pat2);
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}
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else abort();
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}
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@ -140,31 +140,29 @@ static Expr fixAttrs(bool recursive, ATermList as)
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static void checkPatternVars(ATerm pos, ATermMap & map, Pattern pat)
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{
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ATerm name;
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ATerm name = sNoAlias;
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ATermList formals;
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Pattern pat1, pat2;
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ATermBool ellipsis;
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if (matchVarPat(pat, name)) {
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if (map.get(name))
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throw ParseError(format("duplicate formal function argument `%1%' at %2%")
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% aterm2String(name) % showPos(pos));
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map.set(name, name);
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}
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else if (matchAttrsPat(pat, formals, ellipsis)) {
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if (matchAttrsPat(pat, formals, ellipsis, name)) {
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for (ATermIterator i(formals); i; ++i) {
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ATerm d1;
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if (!matchFormal(*i, name, d1)) abort();
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ATerm d1, name2;
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if (!matchFormal(*i, name2, d1)) abort();
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if (map.get(name2))
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throw ParseError(format("duplicate formal function argument `%1%' at %2%")
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% aterm2String(name2) % showPos(pos));
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map.set(name2, name2);
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}
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}
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else matchVarPat(pat, name);
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if (name != sNoAlias) {
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if (map.get(name))
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throw ParseError(format("duplicate formal function argument `%1%' at %2%")
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% aterm2String(name) % showPos(pos));
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map.set(name, name);
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}
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}
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else if (matchAtPat(pat, pat1, pat2)) {
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checkPatternVars(pos, map, pat1);
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checkPatternVars(pos, map, pat2);
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}
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else abort();
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}
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@ -323,7 +321,7 @@ static void freeAndUnprotect(void * p)
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%type <t> start expr expr_function expr_if expr_op
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%type <t> expr_app expr_select expr_simple bind inheritsrc formal
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%type <t> pattern pattern2
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%type <t> pattern
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%type <ts> binds ids attrpath expr_list string_parts ind_string_parts
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%type <formals> formals
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%token <t> ID INT STR IND_STR PATH URI
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@ -433,13 +431,10 @@ ind_string_parts
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;
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pattern
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: pattern2 '@' pattern { $$ = makeAtPat($1, $3); }
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| pattern2
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;
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pattern2
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: ID { $$ = makeVarPat($1); }
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| '{' formals '}' { $$ = makeAttrsPat($2.formals, $2.ellipsis ? eTrue : eFalse); }
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| '{' formals '}' { $$ = makeAttrsPat($2.formals, $2.ellipsis ? eTrue : eFalse, sNoAlias); }
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| '{' formals '}' '@' ID { $$ = makeAttrsPat($2.formals, $2.ellipsis ? eTrue : eFalse, $5); }
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| ID '@' '{' formals '}' { $$ = makeAttrsPat($4.formals, $4.ellipsis ? eTrue : eFalse, $1); }
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;
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binds
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@ -846,19 +846,14 @@ static void attrsInPattern(ATermMap & map, Pattern pat)
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{
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ATerm name;
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ATermList formals;
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Pattern pat1, pat2;
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ATermBool ellipsis;
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if (matchAttrsPat(pat, formals, ellipsis)) {
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if (matchAttrsPat(pat, formals, ellipsis, name)) {
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for (ATermIterator i(formals); i; ++i) {
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ATerm def;
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if (!matchFormal(*i, name, def)) abort();
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map.set(name, makeAttrRHS(makeBool(def != constNoDefaultValue), makeNoPos()));
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}
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}
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else if (matchAtPat(pat, pat1, pat2)) {
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attrsInPattern(map, pat1);
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attrsInPattern(map, pat2);
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}
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}
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@ -1 +1 @@
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Str("abcxyzDDDDEFghijk",[])
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Str("abcxyzDDDDEFijk",[])
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@ -6,8 +6,6 @@ let
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h = {x ? "d", y ? x, z ? args.x}@args: x + y + z;
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i = args@args2: args.x + args2.y;
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j = {x, y, z, ...}: x + y + z;
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in
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@ -15,5 +13,4 @@ in
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g {x = "x"; y = "y"; z = "z";} +
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h {x = "D";} +
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h {x = "D"; y = "E"; z = "F";} +
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i {x = "g"; y = "h";} +
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j {x = "i"; y = "j"; z = "k"; bla = "bla"; foo = "bar";}
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@ -6,14 +6,11 @@
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</attr>
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<attr name="at">
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<function>
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<at>
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<varpat name="args" />
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<attrspat>
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<attrspat name="args">
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<attr name="x" />
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<attr name="y" />
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<attr name="z" />
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</attrspat>
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</at>
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</function>
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</attr>
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<attr name="b">
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@ -24,11 +21,10 @@
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</attr>
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<attr name="ellipsis">
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<function>
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<attrspat>
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<attrspat ellipsis="1">
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<attr name="x" />
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<attr name="y" />
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<attr name="z" />
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<ellipsis />
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</attrspat>
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</function>
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</attr>
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|
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@ -1 +1 @@
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Function(AttrsPat([Formal("x",NoDefaultValue),Formal("y",NoDefaultValue),Formal("z",NoDefaultValue)],Bool(False)),OpPlus(OpPlus(Var("x"),Var("y")),Var("z")),NoPos)
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Function(AttrsPat([Formal("x",NoDefaultValue),Formal("y",NoDefaultValue),Formal("z",NoDefaultValue)],Bool(False),""),OpPlus(OpPlus(Var("x"),Var("y")),Var("z")),NoPos)
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|
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@ -1 +1 @@
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Function(AttrsPat([Formal("stdenv",NoDefaultValue),Formal("fetchurl",NoDefaultValue)],Bool(False)),Call(Select(Var("stdenv"),"mkDerivation"),Attrs([Bind("name",Str("libXi-6.0.1",[]),NoPos),Bind("src",Call(Var("fetchurl"),Attrs([Bind("md5",Str("7e935a42428d63a387b3c048be0f2756",[]),NoPos),Bind("url",Str("http://freedesktop.org/~xlibs/release/libXi-6.0.1.tar.bz2",[]),NoPos)])),NoPos)])),NoPos)
|
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Function(AttrsPat([Formal("stdenv",NoDefaultValue),Formal("fetchurl",NoDefaultValue)],Bool(False),""),Call(Select(Var("stdenv"),"mkDerivation"),Attrs([Bind("name",Str("libXi-6.0.1",[]),NoPos),Bind("src",Call(Var("fetchurl"),Attrs([Bind("md5",Str("7e935a42428d63a387b3c048be0f2756",[]),NoPos),Bind("url",Str("http://freedesktop.org/~xlibs/release/libXi-6.0.1.tar.bz2",[]),NoPos)])),NoPos)])),NoPos)
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@ -1 +1 @@
|
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Function(AttrsPat([Formal("localServer",DefaultValue(Var("false"))),Formal("httpServer",DefaultValue(Var("false"))),Formal("sslSupport",DefaultValue(Var("false"))),Formal("pythonBindings",DefaultValue(Var("false"))),Formal("javaSwigBindings",DefaultValue(Var("false"))),Formal("javahlBindings",DefaultValue(Var("false"))),Formal("stdenv",NoDefaultValue),Formal("fetchurl",NoDefaultValue),Formal("openssl",DefaultValue(Var("null"))),Formal("httpd",DefaultValue(Var("null"))),Formal("db4",DefaultValue(Var("null"))),Formal("expat",NoDefaultValue),Formal("swig",DefaultValue(Var("null"))),Formal("j2sdk",DefaultValue(Var("null")))],Bool(False)),Assert(OpNEq(Var("expat"),Var("null")),Assert(OpImpl(Var("localServer"),OpNEq(Var("db4"),Var("null"))),Assert(OpImpl(Var("httpServer"),OpAnd(OpNEq(Var("httpd"),Var("null")),OpEq(Select(Var("httpd"),"expat"),Var("expat")))),Assert(OpImpl(Var("sslSupport"),OpAnd(OpNEq(Var("openssl"),Var("null")),OpImpl(Var("httpServer"),OpEq(Select(Var("httpd"),"openssl"),Var("openssl"))))),Assert(OpImpl(Var("pythonBindings"),OpAnd(OpNEq(Var("swig"),Var("null")),Select(Var("swig"),"pythonSupport"))),Assert(OpImpl(Var("javaSwigBindings"),OpAnd(OpNEq(Var("swig"),Var("null")),Select(Var("swig"),"javaSupport"))),Assert(OpImpl(Var("javahlBindings"),OpNEq(Var("j2sdk"),Var("null"))),Call(Select(Var("stdenv"),"mkDerivation"),Attrs([Bind("builder",Path("/foo/bar"),NoPos),Bind("db4",If(Var("localServer"),Var("db4"),Var("null")),NoPos),Bind("expat",Var("expat"),NoPos),Bind("httpServer",Var("httpServer"),NoPos),Bind("httpd",If(Var("httpServer"),Var("httpd"),Var("null")),NoPos),Bind("j2sdk",If(Var("javaSwigBindings"),Select(Var("swig"),"j2sdk"),If(Var("javahlBindings"),Var("j2sdk"),Var("null"))),NoPos),Bind("javaSwigBindings",Var("javaSwigBindings"),NoPos),Bind("javahlBindings",Var("javahlBindings"),NoPos),Bind("localServer",Var("localServer"),NoPos),Bind("name",Str("subversion-1.1.1",[]),NoPos),Bind("openssl",If(Var("sslSupport"),Var("openssl"),Var("null")),NoPos),Bind("patches",If(Var("javahlBindings"),List([Path("/javahl.patch")]),List([])),NoPos),Bind("python",If(Var("pythonBindings"),Select(Var("swig"),"python"),Var("null")),NoPos),Bind("pythonBindings",Var("pythonBindings"),NoPos),Bind("src",Call(Var("fetchurl"),Attrs([Bind("md5",Str("a180c3fe91680389c210c99def54d9e0",[]),NoPos),Bind("url",Str("http://subversion.tigris.org/tarballs/subversion-1.1.1.tar.bz2",[]),NoPos)])),NoPos),Bind("sslSupport",Var("sslSupport"),NoPos),Bind("swig",If(OpOr(Var("pythonBindings"),Var("javaSwigBindings")),Var("swig"),Var("null")),NoPos)])),NoPos),NoPos),NoPos),NoPos),NoPos),NoPos),NoPos),NoPos)
|
||||
Function(AttrsPat([Formal("localServer",DefaultValue(Var("false"))),Formal("httpServer",DefaultValue(Var("false"))),Formal("sslSupport",DefaultValue(Var("false"))),Formal("pythonBindings",DefaultValue(Var("false"))),Formal("javaSwigBindings",DefaultValue(Var("false"))),Formal("javahlBindings",DefaultValue(Var("false"))),Formal("stdenv",NoDefaultValue),Formal("fetchurl",NoDefaultValue),Formal("openssl",DefaultValue(Var("null"))),Formal("httpd",DefaultValue(Var("null"))),Formal("db4",DefaultValue(Var("null"))),Formal("expat",NoDefaultValue),Formal("swig",DefaultValue(Var("null"))),Formal("j2sdk",DefaultValue(Var("null")))],Bool(False),""),Assert(OpNEq(Var("expat"),Var("null")),Assert(OpImpl(Var("localServer"),OpNEq(Var("db4"),Var("null"))),Assert(OpImpl(Var("httpServer"),OpAnd(OpNEq(Var("httpd"),Var("null")),OpEq(Select(Var("httpd"),"expat"),Var("expat")))),Assert(OpImpl(Var("sslSupport"),OpAnd(OpNEq(Var("openssl"),Var("null")),OpImpl(Var("httpServer"),OpEq(Select(Var("httpd"),"openssl"),Var("openssl"))))),Assert(OpImpl(Var("pythonBindings"),OpAnd(OpNEq(Var("swig"),Var("null")),Select(Var("swig"),"pythonSupport"))),Assert(OpImpl(Var("javaSwigBindings"),OpAnd(OpNEq(Var("swig"),Var("null")),Select(Var("swig"),"javaSupport"))),Assert(OpImpl(Var("javahlBindings"),OpNEq(Var("j2sdk"),Var("null"))),Call(Select(Var("stdenv"),"mkDerivation"),Attrs([Bind("builder",Path("/foo/bar"),NoPos),Bind("db4",If(Var("localServer"),Var("db4"),Var("null")),NoPos),Bind("expat",Var("expat"),NoPos),Bind("httpServer",Var("httpServer"),NoPos),Bind("httpd",If(Var("httpServer"),Var("httpd"),Var("null")),NoPos),Bind("j2sdk",If(Var("javaSwigBindings"),Select(Var("swig"),"j2sdk"),If(Var("javahlBindings"),Var("j2sdk"),Var("null"))),NoPos),Bind("javaSwigBindings",Var("javaSwigBindings"),NoPos),Bind("javahlBindings",Var("javahlBindings"),NoPos),Bind("localServer",Var("localServer"),NoPos),Bind("name",Str("subversion-1.1.1",[]),NoPos),Bind("openssl",If(Var("sslSupport"),Var("openssl"),Var("null")),NoPos),Bind("patches",If(Var("javahlBindings"),List([Path("/javahl.patch")]),List([])),NoPos),Bind("python",If(Var("pythonBindings"),Select(Var("swig"),"python"),Var("null")),NoPos),Bind("pythonBindings",Var("pythonBindings"),NoPos),Bind("src",Call(Var("fetchurl"),Attrs([Bind("md5",Str("a180c3fe91680389c210c99def54d9e0",[]),NoPos),Bind("url",Str("http://subversion.tigris.org/tarballs/subversion-1.1.1.tar.bz2",[]),NoPos)])),NoPos),Bind("sslSupport",Var("sslSupport"),NoPos),Bind("swig",If(OpOr(Var("pythonBindings"),Var("javaSwigBindings")),Var("swig"),Var("null")),NoPos)])),NoPos),NoPos),NoPos),NoPos),NoPos),NoPos),NoPos),NoPos)
|
||||
|
|
|
|||
Loading…
Reference in a new issue