C compiler with embedded metalanguage.
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99 lines
2.1 KiB

@{
println(x) { print(x, "\n"); }
treeCopy(x) {
l = {};
k = _keys(x);
if (k == null) {
return clone(x);
} else {
for (i in k) {
l[k[i]] = clone(treeCopy(x[k[i]]));
}
return clone(l);
}
}
getId(x) { { identifier: x, __proto__: C_id }; }
getEnum(x) { { attributeL: null, expression: null, name: getId(x), __proto__: C_enum }; }
getComma() { { text: ",", comment: { text : " ", __proto__: Comment }, __proto__: Token }; }
getComment(x) { { text : x, __proto__: Comment }; }
// adding the element e at the end of the list l
append(s, e) {
s[length(s)] = e;
}
// add or don't change an element in a dictionnary
intern(s, e) {
lo = 0;
hi = length(s) - 1;
while (lo <= hi) {
mid = (lo+hi)/2;
if (e > s[mid]) lo = mid + 1;
else if (e < s[mid]) hi = mid - 1;
else return e;
}
for (i = length(s); i > lo; i = i - 1) {
s[i] = s[i-1];
}
return s[lo] = e;
}
fusion(s1, s2) {
for (i in s2) {
append(s1, s2[i]);
}
return s1;
// return treeCopy(s1);
}
// If g then we add a filter on the application of the function f to each element of seq
map(f, seq, g) {
out = {};
if (g) {
for (i in seq) {
e = seq[i];
if (g(e)) { e = f(e); }
append(out, e);
}
} else {
for (i in seq) {
append(out, f(seq[i]));
}
}
out;
}
notToken(x) { x.__proto__ != Token }
// Select element e of s if the the result of the application of f on e is true
select(f, s) {
out = {};
for (i in s) {
e = s[i];
if (f(e)) { append(out, e); }
}
out;
}
// Select element e of s if the the result of the application of f on e is false
reject(f, s) {
out = {};
for (i in s) {
e = s[i];
if (!f(e)) { append(out, e); }
}
out;
}
// Get the last element of s
last(s) {
s[length(s)-1];
}
nil;
}