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Check if clang_Type_getNumTemplateArguments is loaded before use #1321

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Merged
merged 1 commit into from
May 29, 2018
+12 −2
Merged

Check if clang_Type_getNumTemplateArguments is loaded before use #1321

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14 changes: 12 additions & 2 deletions src/clang.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -911,6 +911,13 @@ impl Type {
/// Get the number of template arguments this type has, or `None` if it is
/// not some kind of template.
pub fn num_template_args(&self) -> Option<u32> {
// If an old libclang is loaded, we have no hope of answering this
// question correctly. However, that's no reason to panic when
// generating bindings for simple C headers with an old libclang.
if !clang_Type_getNumTemplateArguments::is_loaded() {
return None
}

let n = unsafe { clang_Type_getNumTemplateArguments(self.x) };
if n >= 0 {
Some(n as u32)
Expand Down Expand Up @@ -1639,8 +1646,11 @@ pub fn ast_dump(c: &Cursor, depth: isize) -> CXChildVisitResult {
depth,
format!(" {}spelling = \"{}\"", prefix, ty.spelling()),
);
let num_template_args =
unsafe { clang_Type_getNumTemplateArguments(ty.x) };
let num_template_args = if clang_Type_getNumTemplateArguments::is_loaded() {
unsafe { clang_Type_getNumTemplateArguments(ty.x) }
} else {
-1
};
if num_template_args >= 0 {
print_indent(
depth,
Expand Down