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Add a lexer for Ada 2012. #1255

Merged
merged 2 commits into from
Jul 11, 2019
Merged

Add a lexer for Ada 2012. #1255

merged 2 commits into from
Jul 11, 2019

Commits on Jul 10, 2019

  1. Add lexer for Ada 2012. 

    This implements Ada as described in the [Consolidated Ada 2012 Language
Reference Manual](http://ada-auth.org/standards/ada12_w_tc1.html).

Follow the pygments example in terms of mime-type and file extensions
detected, but allow for full Unicode identifiers. Ada has specific rules
about the use of underscores in identifiers and number literals, and we
flag any errors.

Resolves #824.
    @stoklund
    stoklund committed Jul 10, 2019
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  2. Update Ada lexer after review by @pyrmont. 

    The rule entering state :libunit_name was incorrectly classifying
whitespace as Keyword::Namespace in `limited with`. Add a spec to make
sure this is marked as Text.

In the :libunit_name state, detect keywords that shouldn't be there and
use those to recover quickly from the incorrectly entered state.

This recovery is more robust that the previous ping-pong with
:libunit_sep, so merge that state into libunit_name for simplicity.

Add specs to make sure we're recovering well.
    @stoklund
    stoklund committed Jul 10, 2019
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