31 lines
1.0 KiB
Ruby
31 lines
1.0 KiB
Ruby
require_relative "basic_types"
|
|
require_relative "tokens"
|
|
require_relative "keywords"
|
|
require_relative "conditional"
|
|
require_relative "expression"
|
|
require_relative "function_call"
|
|
require_relative "function_definition"
|
|
|
|
module Parser
|
|
|
|
# obviously a work in progress !!
|
|
# We "compose" the parser from bits, divide and hopefully conquer
|
|
|
|
# a note about .maybe : .maybe is almost every respect the same as .repeat(0,1)
|
|
# so either 0, or 1, in other words maybe. Nice feature, but there are strings attached:
|
|
# a maybe removes the 0 a sequence (array) to a single (hash). Thus 2 transformations are needed
|
|
# More work than the prettiness is worth, so only use .maybe on something that does not need capturing
|
|
|
|
class Crystal < Parslet::Parser
|
|
include BasicTypes
|
|
include Tokens
|
|
include Keywords
|
|
include FunctionCall
|
|
include FunctionDefinition
|
|
include Conditional
|
|
include Expression
|
|
|
|
rule(:root){ (function_definition | expression | assignment | function_call).repeat }
|
|
end
|
|
end
|