legacy_accents

Check that legacy accents aren't used in composite glyphs.

legacy_accents

• Applies to: TTF
• Fontspector can hotfix?: no
• Fontspector can fix sources?: no

Rationale

Legacy accents should not have anchors and should have positive width. They are often used independently of a letter, either as a placeholder for an expected combined mark+letter combination in MacOS, or separately. For instance, U+00B4 (ACUTE ACCENT) is often mistakenly used as an apostrophe, U+0060 (GRAVE ACCENT) is used in Markdown to notify code blocks, and ^ is used as an exponential operator in maths.

Proposal

• https://github.com/fonttools/fontbakery/issues/4310

Profiles

• universal (in section 'Universal Profile Checks')

• googlefonts (in section 'Universal Profile Checks')