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Add some type-checking helpers to Nasal.Props

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This commit is contained in:
James Turner 2020-04-14 13:26:29 +01:00
parent e1d00509c7
commit 81ba646111
1 changed files with 37 additions and 0 deletions
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37
src/Scripting/nasal-props.cxx
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@ -125,6 +125,41 @@ static naRef f_getType(naContext c, naRef me, int argc, naRef* args)
return NASTR(t);
}
// Check if type of a property is numeric (returns 0 or 1).
// Forms:
// props.Node.isNumeric(string relative_path);
// props.Node.isNumeric();
static naRef f_isNumeric(naContext c, naRef me, int argc, naRef* args)
{
using namespace simgear;
NODEARG();
MOVETARGET(naVec_size(argv) > 0, false);
switch(node->getType()) {
case props::INT:
case props::LONG:
case props::FLOAT:
case props::DOUBLE: return naNum(true);
default:
break;
}
return naNum(false);
}
// Check if type of a property is integer (returns 0 or 1).
// Forms:
// props.Node.isInt(string relative_path);
// props.Node.isInt();
static naRef f_isInt(naContext c, naRef me, int argc, naRef* args)
{
using namespace simgear;
NODEARG();
MOVETARGET(naVec_size(argv) > 0, false);
if (node->getType() == props::INT) {
return naNum(true);
}
return naNum(false);
}
// Get an attribute of a property by name (returns true/false).
// Forms:
@ -826,6 +861,8 @@ static struct {
{ f_getNode, "_getNode" },
{ f_new, "_new" },
{ f_globals, "_globals" },
{ f_isNumeric, "_isNumeric" },
{ f_isInt, "_isInt" },
{ 0, 0 }
};