diff options
author | Boris Kolpackov <boris@codesynthesis.com> | 2018-07-16 15:21:26 +0200 |
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committer | Boris Kolpackov <boris@codesynthesis.com> | 2018-07-16 15:54:06 +0200 |
commit | 4f63afc1177021d6345502892dbd028f5d6db5eb (patch) | |
tree | 9f3919d7d6798a82deab6fd9ebfb1d1802b2030f /build2/in/rule.hxx | |
parent | 55e858010b9ba53c27475d9ce6f864a84d28fa81 (diff) |
Implement in module
Given test.in containing something along these lines:
foo = $foo$
Now we can do:
using in
file{test}: in{test.in}
file{test}: foo = FOO
The alternative variable substitution symbol can be specified with the
in.symbol variable and lax (instead of the default strict) mode with
in.substitution. For example:
file{test}: in.symbol = '@'
file{test}: in.substitution = lax
Diffstat (limited to 'build2/in/rule.hxx')
-rw-r--r-- | build2/in/rule.hxx | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/build2/in/rule.hxx b/build2/in/rule.hxx new file mode 100644 index 0000000..e588fd9f --- /dev/null +++ b/build2/in/rule.hxx @@ -0,0 +1,50 @@ +// file : build2/in/rule.hxx -*- C++ -*- +// copyright : Copyright (c) 2014-2018 Code Synthesis Ltd +// license : MIT; see accompanying LICENSE file + +#ifndef BUILD2_IN_RULE_HXX +#define BUILD2_IN_RULE_HXX + +#include <build2/types.hxx> +#include <build2/utility.hxx> + +#include <build2/rule.hxx> + +namespace build2 +{ + namespace in + { + // Preprocess an .in file. + // + class rule: public build2::rule + { + public: + rule () {} + + virtual bool + match (action, target&, const string&) const override; + + virtual recipe + apply (action, target&) const override; + + // Perform variable lookup. + // + virtual string + lookup (const location&, const target&, const string& name) const; + + // Perform variable substitution. Return nullopt if it should be + // ignored. + // + virtual optional<string> + substitute (const location&, + const target&, + const string& name, + bool strict) const; + + target_state + perform_update (action, const target&) const; + }; + } +} + +#endif // BUILD2_IN_RULE_HXX |