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Mike Gerwitz 56d92fe22b tamer: Very basic support for template application NIR -> xmli 
This this a big change that's difficult to break up, and I don't have the
energy after it.

This introduces nullary template application, short- and long-form.  Note
that a body of the short form is a `@values@` argument, so that's not
supported yet.

This continues to formalize the idea of what "template application" and
"template expansion" mean in TAMER.  It makes a separate `TplApply`
unnecessary, because now application is simply a reference to a
template.  Expansion and application are one and the same: when a template
expands, it'll re-bind metavariables to the parent context.  So in a
template context, this amounts to application.

But applying a closed template will have nothing to bind, and so is
equivalent to expansion.  And since `Meta` objects are not valid outside of
a `Tpl` context, applying a non-closed template outside of another template
will be invalid.

So we get all of this with a single primitive (getting the "value" of a
template).

The expansion is conceptually like `,@` in Lisp, where we're splicing trees.

It's a mess in some spots, but I want to get this committed before I do a
little bit of cleanup.
 		2023-03-17 10:30:59 -04:00
..
classify tamer: tests/xmli: Break apart single test case 2023-03-10 14:27:59 -05:00
combined tamer: tests/xmli: Break apart single test case 2023-03-10 14:27:59 -05:00
empty tamer: tests/xmli: Break apart single test case 2023-03-10 14:27:59 -05:00
rate tamer: NIR->xmli: Ceil, Floor expressions 2023-03-10 14:28:00 -05:00
template tamer: Very basic support for template application NIR -> xmli 2023-03-17 10:30:59 -04:00
.gitignore tamer: tests/xmli: Formatted and more informative output 2023-03-10 14:27:59 -05:00
README.md tamer: tests/xmli: Break apart single test case 2023-03-10 14:27:59 -05:00
test-xmli tamer: tests/xmli: Estimate tamec time in milliseconds 2023-03-10 14:27:59 -05:00

README.md

XMLI System Test

The xmli file is an intermediate file that serves as a handoff between TAMER and the XSLT-based compiler:

xml -> (TAMER) -> xmli -> (TAME XSLT) -> xmlo

TAMER gets the first shot at processing, and then the compilation process continues with the XSLT-based compiler. This allows TAMER to incrementally augment and manipulate the source file and remove responsibilities from TAME XSLT.

Tests in this directory ensure that this process is working as intended. TAMER's failure to perform a proper handoff will cause TAME XSLT to compile sources incorrectly, since TAMER will have rewritten them to something else.

This handoff is more than just echoing tokens back into a file---it derives a new program from the state of the ASG. This program may have a slightly different representation than the original sources, but it must express an equivalent program, and the program must be at least as performant when emitted by TAME XSLT.

Running Tests

Test are prefixed with test-* and are executable. They must be invoked with the environment variable PATH_TAMEC set to the path of tamec relative to the working directory.

Test cases are organized into sub-directories with src.xml and expected.xml files. src.xml will be compiled with tamec, its output formatted with xmllint --format, and diff'd against the xmllint-formatted output of expected.xml.