how to define a non case sensitive Data Type Rules

[zrwsmd]

Real_type_name returns string:
'LREAL' | 'REAL';

how to change this Data Type Rules can match any 'lreal' or 'real' without validate case sensitive,for example ,'LreAl' also match this rule

[msujew]

Hey @zrwsmd,

you can define terminals explicitly for those keywords (note that they should be listed before other, more general terminals):

terminal LREAL: /LREAL/i;
terminal REAL: /REAL/i;

The i makes the corresponding regex case insensitive. In case your whole grammar is case insensitive, you can use the grammar option to disable case sensitivitive for all keywords.

[zrwsmd]

i can not directly add 'i' at end of rule terminal,

[zrwsmd]

grammar St
entry St:
bb=REAL;

terminal REAL: /REAL/;

[msujew]

The playground is still running Langium version 1.2.0, while the feature has been added in 1.3.0 of Langium.