syntactically correct incorrect ABAP with functional methods parentheses

[matt]

This is not syntactically correct, as expected.

cl_demo_output=>write(5).

This is syntactically correct and runs fine. Not expected.

REPORT.
cl_demo_output=>write(`some_text`).
cl_demo_output=>write( `some_text`).
cl_demo_output=>write(`some_text` ).
cl_demo_output=>display( ).

But the language definition says spaces are required after the opening parenthesis and before the closing.

[matt]

This is not syntactically correct, as expected.

cl_demo_output=>write(5).

This is syntactically correct and runs fine. Not expected.

REPORT.
cl_demo_output=>write(`some_text`).
cl_demo_output=>write( `some_text`).
cl_demo_output=>write(`some_text` ).
cl_demo_output=>display( ).

But the language definition says spaces are required after the opening parenthesis and before the closing.

[FredericGirod]

It is wrong with variables

data(text) = conv string(`some text`). 
cl_demo_output=>write(text).

it looks like the | command :

data(text) = |my text is created :{ sy-datum }|  

no space before text needed, but space between variable are mandatories

[Jean_Sagi]

For me is a compiler problem that has acompanied ABAP from a long time now (...just my opinion...).

[matt]

I don't disagree.