validation

keys

validate / IF*

require

invalid

Tiny condition language (simple, readable)*

• Comparisons: =, !=

• Lists: in(a,b,c)

• Booleans: yes/no/true/false → bools

• Logic: and, or, not (or &&, ||, !)

usages

(in top of) of each ctxt 'part'

example, stops parsing the file (in FileParser)

validate:1==2

procede:break / stop*