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Add some debug assertions

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Brendan Zabarauskas 2014-05-15 13:57:32 -07:00
parent f883c6238e
commit fccc5d2071
1 changed files with 21 additions and 0 deletions
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21
src/components/main/layout/inline.rs
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@ -139,6 +139,13 @@ impl RangeIndex for LineIndices {}
impl Add<LineIndices, LineIndices> for LineIndices {
fn add(&self, other: &LineIndices) -> LineIndices {
// TODO: use debug_assert! after rustc upgrade
if cfg!(not(ndebug)) {
assert!(other.fragment_index == num::zero() || other.glyph_index == num::zero(),
"Attempted to add {} to {}. Both the fragment_index and \
glyph_index of the RHS are non-zero. This probably \
was a mistake!", self, other);
}
LineIndices {
fragment_index: self.fragment_index + other.fragment_index,
glyph_index: self.glyph_index + other.glyph_index,
@ -148,6 +155,13 @@ impl Add<LineIndices, LineIndices> for LineIndices {
impl Sub<LineIndices, LineIndices> for LineIndices {
fn sub(&self, other: &LineIndices) -> LineIndices {
// TODO: use debug_assert! after rustc upgrade
if cfg!(not(ndebug)) {
assert!(other.fragment_index == num::zero() || other.glyph_index == num::zero(),
"Attempted to subtract {} from {}. Both the \
fragment_index and glyph_index of the RHS are non-zero. \
This probably was a mistake!", self, other);
}
LineIndices {
fragment_index: self.fragment_index - other.fragment_index,
glyph_index: self.glyph_index - other.glyph_index,
@ -157,6 +171,13 @@ impl Sub<LineIndices, LineIndices> for LineIndices {
impl Neg<LineIndices> for LineIndices {
fn neg(&self) -> LineIndices {
// TODO: use debug_assert! after rustc upgrade
if cfg!(not(ndebug)) {
assert!(self.fragment_index == num::zero() || self.glyph_index == num::zero(),
"Attempted to negate {}. Both the fragment_index and \
glyph_index are non-zero. This probably was a mistake!",
self);
}
LineIndices {
fragment_index: -self.fragment_index,
glyph_index: -self.glyph_index,