What steps will reproduce the problem? 1. Setup a project with the proto unit test files 2. Observe unittest.proto line 150

optional double default_double = 72 [default = 52e3 ];

3. "52e3" is not recognized as a valid terminal

What is the expected output? What do you see instead?

As it appears in the unit tests for the proto library it stands to reason it should at least not provide a syntax error.

What version of the product are you using? On what operating system? 1.0.0

Please provide any additional information below.

This problem might be easy to solve...

The terminal for DECIMAL (line 159?) needs to be updated as such:

terminal DECIMAL: ('-')? (NUMBER)* ('.' (NUMBER)+)? ('e'('-')? (NUMBER)+)?;

added> ('e'('-')? (NUMBER)+)?

I'm not well versed enough in EMF to say if this will cause any problem with the

terminal FLOAT returns ecore::EFloat: DECIMAL; terminal DOUBLE returns ecore::EDouble: DECIMAL;

Rules which return ecore types. Are these parsed using Double.parseDouble(String)? (if so it should all work with just this terminal change - it seems the logical way for it to work as well)

minor tweak - "E" appears to be valid in the test cases as well...

terminal DECIMAL: ('-')? (NUMBER)* ('.' (NUMBER)+)? (('e'|'E')('-')? (NUMBER)+)?;

r333505e4fea0