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28 lines
968 B
Markdown
28 lines
968 B
Markdown
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# IfcOpenShell express schema parser and code generator
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This folder contains Python code to generate C++ type information based on an
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Express schema. In particular is has only been tested using recent version of
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the IFC schema and will most likely fail on any other Express schema.
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The code can be invoked in the following way and results in several code outputs
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named according to the schema name in the Express file. A python 3 interpreter
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with the `pyparsing` (`pip install pyparsing`) library is required.
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## Command line usage for code generation
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~~~
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# python3 bootstrap.py express.bnf > express_parser.py
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python3 express_parser.py IFC2X3_TC1.exp header implementation schema_class definitions
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~~~
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## Programmatic usage
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~~~py
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import ifcopenshell
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import ifcopenshell.express
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schema = ifcopenshell.express.parse('IFC.exp')
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ifcopenshell.register_schema(schema)
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f = ifcopenshell.file(schema=schema.schema.name())
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f.createIfcProject(ifcopenshell.guid.new())
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~~~
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