class Prism::Translation::RubyParser::Compiler
A prism visitor that builds Sexp objects.
Attributes
This is the name of the file that we are compiling. We set it on every Sexp object that is generated, and also use it to compile __FILE__
nodes.
Class variables will change their type based on if they are inside of a method definition or not, so we need to track that state.
Some nodes will change their representation if they are inside of a pattern, so we need to track that state.
Public Class Methods
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# File lib/prism/translation/ruby_parser.rb, line 32 def initialize(file, in_def: false, in_pattern: false) @file = file @in_def = in_def @in_pattern = in_pattern end
Initialize a new compiler with the given file name.
Public Instance Methods
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# File lib/prism/translation/ruby_parser.rb, line 50 def visit_alias_global_variable_node(node) s(node, :valias, node.new_name.name, node.old_name.name) end
alias $foo $bar ^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 42 def visit_alias_method_node(node) s(node, :alias, visit(node.new_name), visit(node.old_name)) end
alias foo bar ^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 58 def visit_alternation_pattern_node(node) s(node, :or, visit(node.left), visit(node.right)) end
foo => bar | baz ^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 66 def visit_and_node(node) left = visit(node.left) if left[0] == :and # ruby_parser has the and keyword as right-associative as opposed to # prism which has it as left-associative. We reverse that # associativity here. nest = left nest = nest[2] while nest[2][0] == :and nest[2] = s(node, :and, nest[2], visit(node.right)) left else s(node, :and, left, visit(node.right)) end end
a and b ^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 123 def visit_arguments_node(node) raise "Cannot visit arguments directly" end
foo(bar) ^^^
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# File lib/prism/translation/ruby_parser.rb, line 86 def visit_array_node(node) if in_pattern s(node, :array_pat, nil).concat(visit_all(node.elements)) else s(node, :array).concat(visit_all(node.elements)) end end
[] ^^
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# File lib/prism/translation/ruby_parser.rb, line 98 def visit_array_pattern_node(node) if node.constant.nil? && node.requireds.empty? && node.rest.nil? && node.posts.empty? s(node, :array_pat) else result = s(node, :array_pat, visit_pattern_constant(node.constant)).concat(visit_all(node.requireds)) case node.rest when SplatNode result << :"*#{node.rest.expression&.name}" when ImplicitRestNode result << :* # This doesn't make any sense at all, but since we're trying to # replicate the behavior directly, we'll copy it. result.line(666) end result.concat(visit_all(node.posts)) end end
foo => [bar] ^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 131 def visit_assoc_node(node) [visit(node.key), visit(node.value)] end
{ a: 1 } ^^^^
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# File lib/prism/translation/ruby_parser.rb, line 142 def visit_assoc_splat_node(node) if node.value.nil? [s(node, :kwsplat)] else [s(node, :kwsplat, visit(node.value))] end end
def foo(**); bar(**); end ^^ { **foo } ^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 154 def visit_back_reference_read_node(node) s(node, :back_ref, node.name.name.delete_prefix("$").to_sym) end
$+ ^^
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# File lib/prism/translation/ruby_parser.rb, line 162 def visit_begin_node(node) result = node.statements.nil? ? s(node, :nil) : visit(node.statements) if !node.rescue_clause.nil? if !node.statements.nil? result = s(node.statements, :rescue, result, visit(node.rescue_clause)) else result = s(node.rescue_clause, :rescue, visit(node.rescue_clause)) end current = node.rescue_clause until (current = current.subsequent).nil? result << visit(current) end end if !node.else_clause&.statements.nil? result << visit(node.else_clause) end if !node.ensure_clause.nil? if !node.statements.nil? || !node.rescue_clause.nil? || !node.else_clause.nil? result = s(node.statements || node.rescue_clause || node.else_clause || node.ensure_clause, :ensure, result, visit(node.ensure_clause)) else result = s(node.ensure_clause, :ensure, visit(node.ensure_clause)) end end result end
begin end ^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 197 def visit_block_argument_node(node) s(node, :block_pass).tap do |result| result << visit(node.expression) unless node.expression.nil? end end
foo(&bar) ^^^^
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# File lib/prism/translation/ruby_parser.rb, line 207 def visit_block_local_variable_node(node) node.name end
foo { |; bar| } ^^^
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# File lib/prism/translation/ruby_parser.rb, line 212 def visit_block_node(node) s(node, :block_pass, visit(node.expression)) end
A block on a keyword or method call.
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# File lib/prism/translation/ruby_parser.rb, line 220 def visit_block_parameter_node(node) :"&#{node.name}" end
def foo(&bar); end ^^^^
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# File lib/prism/translation/ruby_parser.rb, line 225 def visit_block_parameters_node(node) # If this block parameters has no parameters and is using pipes, then # it inherits its location from its shadow locals, even if they're not # on the same lines as the pipes. shadow_loc = true result = if node.parameters.nil? s(node, :args) else shadow_loc = false visit(node.parameters) end if node.opening == "(" result.line = node.opening_loc.start_line result.line_max = node.closing_loc.end_line shadow_loc = false end if node.locals.any? shadow = s(node, :shadow).concat(visit_all(node.locals)) shadow.line = node.locals.first.location.start_line shadow.line_max = node.locals.last.location.end_line result << shadow if shadow_loc result.line = shadow.line result.line_max = shadow.line_max end end result end
A block’s parameters.
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# File lib/prism/translation/ruby_parser.rb, line 267 def visit_break_node(node) if node.arguments.nil? s(node, :break) elsif node.arguments.arguments.length == 1 s(node, :break, visit(node.arguments.arguments.first)) else s(node, :break, s(node.arguments, :array).concat(visit_all(node.arguments.arguments))) end end
break ^^^^^ break foo ^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 341 def visit_call_and_write_node(node) if op_asgn?(node) s(node, op_asgn_type(node, :op_asgn), visit(node.receiver), visit_write_value(node.value), node.read_name, :"&&") else s(node, op_asgn_type(node, :op_asgn2), visit(node.receiver), node.write_name, :"&&", visit_write_value(node.value)) end end
foo.bar &&= baz ^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 287 def visit_call_node(node) case node.name when :!~ return s(node, :not, visit(node.copy(name: :"=~"))) when :=~ if node.arguments&.arguments&.length == 1 && node.block.nil? case node.receiver when StringNode return s(node, :match3, visit(node.arguments.arguments.first), visit(node.receiver)) when RegularExpressionNode, InterpolatedRegularExpressionNode return s(node, :match2, visit(node.receiver), visit(node.arguments.arguments.first)) end case node.arguments.arguments.first when RegularExpressionNode, InterpolatedRegularExpressionNode return s(node, :match3, visit(node.arguments.arguments.first), visit(node.receiver)) end end end type = node.attribute_write? ? :attrasgn : :call type = :"safe_#{type}" if node.safe_navigation? arguments = node.arguments&.arguments || [] write_value = arguments.pop if type == :attrasgn block = node.block if block.is_a?(BlockArgumentNode) arguments << block block = nil end result = s(node, type, visit(node.receiver), node.name).concat(visit_all(arguments)) result << visit_write_value(write_value) unless write_value.nil? visit_block(node, result, block) end
foo ^^^ foo.bar ^^^^^^^ foo.bar() {} ^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 329 def visit_call_operator_write_node(node) if op_asgn?(node) s(node, op_asgn_type(node, :op_asgn), visit(node.receiver), visit_write_value(node.value), node.read_name, node.binary_operator) else s(node, op_asgn_type(node, :op_asgn2), visit(node.receiver), node.write_name, node.binary_operator, visit_write_value(node.value)) end end
foo.bar += baz ^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 353 def visit_call_or_write_node(node) if op_asgn?(node) s(node, op_asgn_type(node, :op_asgn), visit(node.receiver), visit_write_value(node.value), node.read_name, :"||") else s(node, op_asgn_type(node, :op_asgn2), visit(node.receiver), node.write_name, :"||", visit_write_value(node.value)) end end
foo.bar ||= baz ^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 378 def visit_call_target_node(node) s(node, :attrasgn, visit(node.receiver), node.name) end
foo.bar, = 1 ^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 386 def visit_capture_pattern_node(node) visit(node.target) << visit(node.value) end
foo => bar => baz ^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 402 def visit_case_match_node(node) s(node, :case, visit(node.predicate)).concat(visit_all(node.conditions)) << visit(node.else_clause) end
case foo; in bar; end ^^^^^^^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 394 def visit_case_node(node) s(node, :case, visit(node.predicate)).concat(visit_all(node.conditions)) << visit(node.else_clause) end
case foo; when bar; end ^^^^^^^^^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 410 def visit_class_node(node) name = if node.constant_path.is_a?(ConstantReadNode) node.name else visit(node.constant_path) end if node.body.nil? s(node, :class, name, visit(node.superclass)) elsif node.body.is_a?(StatementsNode) compiler = copy_compiler(in_def: false) s(node, :class, name, visit(node.superclass)).concat(node.body.body.map { |child| child.accept(compiler) }) else s(node, :class, name, visit(node.superclass), node.body.accept(copy_compiler(in_def: false))) end end
class Foo; end ^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 459 def visit_class_variable_and_write_node(node) s(node, :op_asgn_and, s(node, :cvar, node.name), s(node, class_variable_write_type, node.name, visit_write_value(node.value))) end
@@foo &&= bar ^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 451 def visit_class_variable_operator_write_node(node) s(node, class_variable_write_type, node.name, s(node, :call, s(node, :cvar, node.name), node.binary_operator, visit_write_value(node.value))) end
@@foo += bar ^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 467 def visit_class_variable_or_write_node(node) s(node, :op_asgn_or, s(node, :cvar, node.name), s(node, class_variable_write_type, node.name, visit_write_value(node.value))) end
@@foo ||= bar ^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 432 def visit_class_variable_read_node(node) s(node, :cvar, node.name) end
@@foo ^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 475 def visit_class_variable_target_node(node) s(node, class_variable_write_type, node.name) end
@@foo, = bar ^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 443 def visit_class_variable_write_node(node) s(node, class_variable_write_type, node.name, visit_write_value(node.value)) end
@@foo = 1 ^^^^^^^^^ @@foo, @@bar = 1 ^^^^^ ^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 516 def visit_constant_and_write_node(node) s(node, :op_asgn_and, s(node, :const, node.name), s(node, :cdecl, node.name, visit(node.value))) end
Foo &&= bar ^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 508 def visit_constant_operator_write_node(node) s(node, :cdecl, node.name, s(node, :call, s(node, :const, node.name), node.binary_operator, visit_write_value(node.value))) end
Foo += bar ^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 524 def visit_constant_or_write_node(node) s(node, :op_asgn_or, s(node, :const, node.name), s(node, :cdecl, node.name, visit(node.value))) end
Foo ||= bar ^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 571 def visit_constant_path_and_write_node(node) s(node, :op_asgn_and, visit(node.target), visit_write_value(node.value)) end
Foo::Bar &&= baz ^^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 540 def visit_constant_path_node(node) if node.parent.nil? s(node, :colon3, node.name) else s(node, :colon2, visit(node.parent), node.name) end end
Foo::Bar ^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 563 def visit_constant_path_operator_write_node(node) s(node, :op_asgn, visit(node.target), node.binary_operator, visit_write_value(node.value)) end
Foo::Bar += baz ^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 579 def visit_constant_path_or_write_node(node) s(node, :op_asgn_or, visit(node.target), visit_write_value(node.value)) end
Foo::Bar ||= baz ^^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 587 def visit_constant_path_target_node(node) inner = if node.parent.nil? s(node, :colon3, node.name) else s(node, :colon2, visit(node.parent), node.name) end s(node, :const, inner) end
Foo::Bar, = baz ^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 555 def visit_constant_path_write_node(node) s(node, :cdecl, visit(node.target), visit_write_value(node.value)) end
Foo::Bar = 1 ^^^^^^^^^^^^ Foo::Foo, Bar::Bar = 1 ^^^^^^^^ ^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 489 def visit_constant_read_node(node) s(node, :const, node.name) end
Foo ^^^
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# File lib/prism/translation/ruby_parser.rb, line 532 def visit_constant_target_node(node) s(node, :cdecl, node.name) end
Foo, = bar ^^^
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# File lib/prism/translation/ruby_parser.rb, line 500 def visit_constant_write_node(node) s(node, :cdecl, node.name, visit_write_value(node.value)) end
Foo = 1 ^^^^^^^ Foo, Bar = 1 ^^^ ^^^
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# File lib/prism/translation/ruby_parser.rb, line 605 def visit_def_node(node) name = node.name_loc.slice.to_sym result = if node.receiver.nil? s(node, :defn, name) else s(node, :defs, visit(node.receiver), name) end result.line(node.name_loc.start_line) if node.parameters.nil? result << s(node, :args).line(node.name_loc.start_line) else result << visit(node.parameters) end if node.body.nil? result << s(node, :nil) elsif node.body.is_a?(StatementsNode) compiler = copy_compiler(in_def: true) result.concat(node.body.body.map { |child| child.accept(compiler) }) else result << node.body.accept(copy_compiler(in_def: true)) end end
def foo; end ^^^^^^^^^^^^ def self.foo; end ^^^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 638 def visit_defined_node(node) s(node, :defined, visit(node.value)) end
defined? a ^^^^^^^^^^ defined?(a) ^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 646 def visit_else_node(node) visit(node.statements) end
if foo then bar else baz end ^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 654 def visit_embedded_statements_node(node) result = s(node, :evstr) result << visit(node.statements) unless node.statements.nil? result end
"foo #{bar}" ^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 664 def visit_embedded_variable_node(node) s(node, :evstr, visit(node.variable)) end
"foo #@bar" ^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 672 def visit_ensure_node(node) node.statements.nil? ? s(node, :nil) : visit(node.statements) end
begin; foo; ensure; bar; end ^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 680 def visit_false_node(node) s(node, :false) end
false ^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 688 def visit_find_pattern_node(node) s(node, :find_pat, visit_pattern_constant(node.constant), :"*#{node.left.expression&.name}", *visit_all(node.requireds), :"*#{node.right.expression&.name}") end
foo => [*, bar, *] ^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 696 def visit_flip_flop_node(node) if node.left.is_a?(IntegerNode) && node.right.is_a?(IntegerNode) s(node, :lit, Range.new(node.left.value, node.right.value, node.exclude_end?)) else s(node, node.exclude_end? ? :flip3 : :flip2, visit(node.left), visit(node.right)) end end
if foo .. bar; end ^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 708 def visit_float_node(node) s(node, :lit, node.value) end
1.0 ^^^
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# File lib/prism/translation/ruby_parser.rb, line 716 def visit_for_node(node) s(node, :for, visit(node.collection), visit(node.index), visit(node.statements)) end
for foo in bar do end ^^^^^^^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 724 def visit_forwarding_arguments_node(node) s(node, :forward_args) end
def foo(...); bar(...); end ^^^
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# File lib/prism/translation/ruby_parser.rb, line 732 def visit_forwarding_parameter_node(node) s(node, :forward_args) end
def foo(...); end ^^^
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# File lib/prism/translation/ruby_parser.rb, line 743 def visit_forwarding_super_node(node) visit_block(node, s(node, :zsuper), node.block) end
super ^^^^^ super {} ^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 778 def visit_global_variable_and_write_node(node) s(node, :op_asgn_and, s(node, :gvar, node.name), s(node, :gasgn, node.name, visit_write_value(node.value))) end
$foo &&= bar ^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 770 def visit_global_variable_operator_write_node(node) s(node, :gasgn, node.name, s(node, :call, s(node, :gvar, node.name), node.binary_operator, visit(node.value))) end
$foo += bar ^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 786 def visit_global_variable_or_write_node(node) s(node, :op_asgn_or, s(node, :gvar, node.name), s(node, :gasgn, node.name, visit_write_value(node.value))) end
$foo ||= bar ^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 751 def visit_global_variable_read_node(node) s(node, :gvar, node.name) end
$foo ^^^^
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# File lib/prism/translation/ruby_parser.rb, line 794 def visit_global_variable_target_node(node) s(node, :gasgn, node.name) end
$foo, = bar ^^^^
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# File lib/prism/translation/ruby_parser.rb, line 762 def visit_global_variable_write_node(node) s(node, :gasgn, node.name, visit_write_value(node.value)) end
$foo = 1 ^^^^^^^^ $foo, $bar = 1 ^^^^ ^^^^
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# File lib/prism/translation/ruby_parser.rb, line 802 def visit_hash_node(node) s(node, :hash).concat(node.elements.flat_map { |element| visit(element) }) end
{} ^^
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# File lib/prism/translation/ruby_parser.rb, line 810 def visit_hash_pattern_node(node) result = s(node, :hash_pat, visit_pattern_constant(node.constant)).concat(node.elements.flat_map { |element| visit(element) }) case node.rest when AssocSplatNode result << s(node.rest, :kwrest, :"**#{node.rest.value&.name}") when NoKeywordsParameterNode result << visit(node.rest) end result end
foo => {} ^^
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# File lib/prism/translation/ruby_parser.rb, line 833 def visit_if_node(node) s(node, :if, visit(node.predicate), visit(node.statements), visit(node.subsequent)) end
if foo then bar end ^^^^^^^^^^^^^^^^^^^ bar if foo ^^^^^^^^^^ foo ? bar : baz ^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 838 def visit_imaginary_node(node) s(node, :lit, node.value) end
1i
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# File lib/prism/translation/ruby_parser.rb, line 846 def visit_implicit_node(node) end
{ foo: } ^^^^
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# File lib/prism/translation/ruby_parser.rb, line 853 def visit_implicit_rest_node(node) end
foo { |bar,| } ^
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# File lib/prism/translation/ruby_parser.rb, line 860 def visit_in_node(node) pattern = if node.pattern.is_a?(ConstantPathNode) s(node.pattern, :const, visit(node.pattern)) else node.pattern.accept(copy_compiler(in_pattern: true)) end s(node, :in, pattern).concat(node.statements.nil? ? [nil] : visit_all(node.statements.body)) end
case foo; in bar; end ^^^^^^^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 890 def visit_index_and_write_node(node) arglist = nil if !node.arguments.nil? || !node.block.nil? arglist = s(node, :arglist).concat(visit_all(node.arguments&.arguments || [])) arglist << visit(node.block) if !node.block.nil? end s(node, :op_asgn1, visit(node.receiver), arglist, :"&&", visit_write_value(node.value)) end
foo[bar] &&= baz ^^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 875 def visit_index_operator_write_node(node) arglist = nil if !node.arguments.nil? || !node.block.nil? arglist = s(node, :arglist).concat(visit_all(node.arguments&.arguments || [])) arglist << visit(node.block) if !node.block.nil? end s(node, :op_asgn1, visit(node.receiver), arglist, node.binary_operator, visit_write_value(node.value)) end
foo[bar] += baz ^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 905 def visit_index_or_write_node(node) arglist = nil if !node.arguments.nil? || !node.block.nil? arglist = s(node, :arglist).concat(visit_all(node.arguments&.arguments || [])) arglist << visit(node.block) if !node.block.nil? end s(node, :op_asgn1, visit(node.receiver), arglist, :"||", visit_write_value(node.value)) end
foo[bar] ||= baz ^^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 920 def visit_index_target_node(node) arguments = visit_all(node.arguments&.arguments || []) arguments << visit(node.block) unless node.block.nil? s(node, :attrasgn, visit(node.receiver), :[]=).concat(arguments) end
foo[bar], = 1 ^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 958 def visit_instance_variable_and_write_node(node) s(node, :op_asgn_and, s(node, :ivar, node.name), s(node, :iasgn, node.name, visit(node.value))) end
@foo &&= bar ^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 950 def visit_instance_variable_operator_write_node(node) s(node, :iasgn, node.name, s(node, :call, s(node, :ivar, node.name), node.binary_operator, visit_write_value(node.value))) end
@foo += bar ^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 966 def visit_instance_variable_or_write_node(node) s(node, :op_asgn_or, s(node, :ivar, node.name), s(node, :iasgn, node.name, visit(node.value))) end
@foo ||= bar ^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 931 def visit_instance_variable_read_node(node) s(node, :ivar, node.name) end
@foo ^^^^
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# File lib/prism/translation/ruby_parser.rb, line 974 def visit_instance_variable_target_node(node) s(node, :iasgn, node.name) end
@foo, = bar ^^^^
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# File lib/prism/translation/ruby_parser.rb, line 942 def visit_instance_variable_write_node(node) s(node, :iasgn, node.name, visit_write_value(node.value)) end
@foo = 1 ^^^^^^^^ @foo, @bar = 1 ^^^^ ^^^^
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# File lib/prism/translation/ruby_parser.rb, line 982 def visit_integer_node(node) s(node, :lit, node.value) end
1 ^
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# File lib/prism/translation/ruby_parser.rb, line 990 def visit_interpolated_match_last_line_node(node) parts = visit_interpolated_parts(node.parts) regexp = if parts.length == 1 s(node, :lit, Regexp.new(parts.first, node.options)) else s(node, :dregx).concat(parts).tap do |result| options = node.options result << options if options != 0 end end s(node, :match, regexp) end
if /foo #{bar}/ then end ^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1009 def visit_interpolated_regular_expression_node(node) parts = visit_interpolated_parts(node.parts) if parts.length == 1 s(node, :lit, Regexp.new(parts.first, node.options)) else s(node, :dregx).concat(parts).tap do |result| options = node.options result << options if options != 0 end end end
/foo #{bar}/ ^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1026 def visit_interpolated_string_node(node) parts = visit_interpolated_parts(node.parts) parts.length == 1 ? s(node, :str, parts.first) : s(node, :dstr).concat(parts) end
"foo #{bar}" ^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1035 def visit_interpolated_symbol_node(node) parts = visit_interpolated_parts(node.parts) parts.length == 1 ? s(node, :lit, parts.first.to_sym) : s(node, :dsym).concat(parts) end
:"foo #{bar}" ^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1044 def visit_interpolated_x_string_node(node) source = node.heredoc? ? node.parts.first : node parts = visit_interpolated_parts(node.parts) parts.length == 1 ? s(source, :xstr, parts.first) : s(source, :dxstr).concat(parts) end
`foo #{bar}` ^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1127 def visit_it_local_variable_read_node(node) s(node, :call, nil, :it) end
-> { it } ^^
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# File lib/prism/translation/ruby_parser.rb, line 1135 def visit_keyword_hash_node(node) s(node, :hash).concat(node.elements.flat_map { |element| visit(element) }) end
foo(bar: baz) ^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1146 def visit_keyword_rest_parameter_node(node) :"**#{node.name}" end
def foo(**bar); end ^^^^^ def foo(**); end ^^
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# File lib/prism/translation/ruby_parser.rb, line 1151 def visit_lambda_node(node) parameters = case node.parameters when nil, NumberedParametersNode s(node, :args) else visit(node.parameters) end if node.body.nil? s(node, :iter, s(node, :lambda), parameters) else s(node, :iter, s(node, :lambda), parameters, visit(node.body)) end end
-> {}
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# File lib/prism/translation/ruby_parser.rb, line 1202 def visit_local_variable_and_write_node(node) s(node, :op_asgn_and, s(node, :lvar, node.name), s(node, :lasgn, node.name, visit_write_value(node.value))) end
foo &&= bar ^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1194 def visit_local_variable_operator_write_node(node) s(node, :lasgn, node.name, s(node, :call, s(node, :lvar, node.name), node.binary_operator, visit_write_value(node.value))) end
foo += bar ^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1210 def visit_local_variable_or_write_node(node) s(node, :op_asgn_or, s(node, :lvar, node.name), s(node, :lasgn, node.name, visit_write_value(node.value))) end
foo ||= bar ^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1171 def visit_local_variable_read_node(node) if node.name.match?(/^_\d$/) s(node, :call, nil, node.name) else s(node, :lvar, node.name) end end
foo ^^^
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# File lib/prism/translation/ruby_parser.rb, line 1218 def visit_local_variable_target_node(node) s(node, :lasgn, node.name) end
foo, = bar ^^^
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# File lib/prism/translation/ruby_parser.rb, line 1186 def visit_local_variable_write_node(node) s(node, :lasgn, node.name, visit_write_value(node.value)) end
foo = 1 ^^^^^^^ foo, bar = 1 ^^^ ^^^
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# File lib/prism/translation/ruby_parser.rb, line 1226 def visit_match_last_line_node(node) s(node, :match, s(node, :lit, Regexp.new(node.unescaped, node.options))) end
if /foo/ then end ^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1234 def visit_match_predicate_node(node) s(node, :case, visit(node.value), s(node, :in, node.pattern.accept(copy_compiler(in_pattern: true)), nil), nil) end
foo in bar ^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1242 def visit_match_required_node(node) s(node, :case, visit(node.value), s(node, :in, node.pattern.accept(copy_compiler(in_pattern: true)), nil), nil) end
foo => bar ^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1250 def visit_match_write_node(node) s(node, :match2, visit(node.call.receiver), visit(node.call.arguments.arguments.first)) end
/(?<foo>foo)/ =~ bar ^^^^^^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1257 def visit_missing_node(node) raise "Cannot visit missing node directly" end
A node that is missing from the syntax tree. This is only used in the case of a syntax error. The parser gem doesn’t have such a concept, so we invent our own here.
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# File lib/prism/translation/ruby_parser.rb, line 1265 def visit_module_node(node) name = if node.constant_path.is_a?(ConstantReadNode) node.name else visit(node.constant_path) end if node.body.nil? s(node, :module, name) elsif node.body.is_a?(StatementsNode) compiler = copy_compiler(in_def: false) s(node, :module, name).concat(node.body.body.map { |child| child.accept(compiler) }) else s(node, :module, name, node.body.accept(copy_compiler(in_def: false))) end end
module Foo; end ^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1287 def visit_multi_target_node(node) targets = [*node.lefts] targets << node.rest if !node.rest.nil? && !node.rest.is_a?(ImplicitRestNode) targets.concat(node.rights) s(node, :masgn, s(node, :array).concat(visit_all(targets))) end
foo, bar = baz ^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1299 def visit_multi_write_node(node) targets = [*node.lefts] targets << node.rest if !node.rest.nil? && !node.rest.is_a?(ImplicitRestNode) targets.concat(node.rights) value = if node.value.is_a?(ArrayNode) && node.value.opening_loc.nil? if node.value.elements.length == 1 && node.value.elements.first.is_a?(SplatNode) visit(node.value.elements.first) else visit(node.value) end else s(node.value, :to_ary, visit(node.value)) end s(node, :masgn, s(node, :array).concat(visit_all(targets)), value) end
foo, bar = baz ^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1325 def visit_next_node(node) if node.arguments.nil? s(node, :next) elsif node.arguments.arguments.length == 1 argument = node.arguments.arguments.first s(node, :next, argument.is_a?(SplatNode) ? s(node, :svalue, visit(argument)) : visit(argument)) else s(node, :next, s(node, :array).concat(visit_all(node.arguments.arguments))) end end
next ^^^^ next foo ^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1340 def visit_nil_node(node) s(node, :nil) end
nil ^^^
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# File lib/prism/translation/ruby_parser.rb, line 1348 def visit_no_keywords_parameter_node(node) in_pattern ? s(node, :kwrest, :"**nil") : :"**nil" end
def foo(**nil); end ^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1356 def visit_numbered_parameters_node(node) raise "Cannot visit numbered parameters directly" end
-> { _1 + _2 } ^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1364 def visit_numbered_reference_read_node(node) s(node, :nth_ref, node.number) end
$1 ^^
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# File lib/prism/translation/ruby_parser.rb, line 1372 def visit_optional_keyword_parameter_node(node) s(node, :kwarg, node.name, visit(node.value)) end
def foo(bar: baz); end ^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1380 def visit_optional_parameter_node(node) s(node, :lasgn, node.name, visit(node.value)) end
def foo(bar = 1); end ^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1388 def visit_or_node(node) left = visit(node.left) if left[0] == :or # ruby_parser has the or keyword as right-associative as opposed to # prism which has it as left-associative. We reverse that # associativity here. nest = left nest = nest[2] while nest[2][0] == :or nest[2] = s(node, :or, nest[2], visit(node.right)) left else s(node, :or, left, visit(node.right)) end end
a or b ^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1408 def visit_parameters_node(node) children = node.compact_child_nodes.map do |element| if element.is_a?(MultiTargetNode) visit_destructured_parameter(element) else visit(element) end end s(node, :args).concat(children) end
def foo(bar, *baz); end ^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1450 def visit_parentheses_node(node) if node.body.nil? s(node, :nil) else visit(node.body) end end
() ^^ (1) ^^^
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# File lib/prism/translation/ruby_parser.rb, line 1462 def visit_pinned_expression_node(node) node.expression.accept(copy_compiler(in_pattern: false)) end
foo => ^(bar) ^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1470 def visit_pinned_variable_node(node) if node.variable.is_a?(LocalVariableReadNode) && node.variable.name.match?(/^_\d$/) s(node, :lvar, node.variable.name) else visit(node.variable) end end
foo = 1 and bar => ^foo ^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1479 def visit_post_execution_node(node) s(node, :iter, s(node, :postexe), 0, visit(node.statements)) end
END {}
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# File lib/prism/translation/ruby_parser.rb, line 1484 def visit_pre_execution_node(node) s(node, :iter, s(node, :preexe), 0, visit(node.statements)) end
BEGIN {}
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# File lib/prism/translation/ruby_parser.rb, line 1489 def visit_program_node(node) visit(node.statements) end
The top-level program node.
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# File lib/prism/translation/ruby_parser.rb, line 1497 def visit_range_node(node) if !in_pattern && !node.left.nil? && !node.right.nil? && ([node.left.type, node.right.type] - %i[nil_node integer_node]).empty? left = node.left.value if node.left.is_a?(IntegerNode) right = node.right.value if node.right.is_a?(IntegerNode) s(node, :lit, Range.new(left, right, node.exclude_end?)) else s(node, node.exclude_end? ? :dot3 : :dot2, visit_range_bounds_node(node.left), visit_range_bounds_node(node.right)) end end
0..5 ^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1521 def visit_rational_node(node) s(node, :lit, node.value) end
1r ^^
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# File lib/prism/translation/ruby_parser.rb, line 1529 def visit_redo_node(node) s(node, :redo) end
redo ^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1537 def visit_regular_expression_node(node) s(node, :lit, Regexp.new(node.unescaped, node.options)) end
/foo/ ^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1545 def visit_required_keyword_parameter_node(node) s(node, :kwarg, node.name) end
def foo(bar:); end ^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1553 def visit_required_parameter_node(node) node.name end
def foo(bar); end ^^^
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# File lib/prism/translation/ruby_parser.rb, line 1561 def visit_rescue_modifier_node(node) s(node, :rescue, visit(node.expression), s(node.rescue_expression, :resbody, s(node.rescue_expression, :array), visit(node.rescue_expression))) end
foo rescue bar ^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1569 def visit_rescue_node(node) exceptions = if node.exceptions.length == 1 && node.exceptions.first.is_a?(SplatNode) visit(node.exceptions.first) else s(node, :array).concat(visit_all(node.exceptions)) end if !node.reference.nil? exceptions << (visit(node.reference) << s(node.reference, :gvar, :"$!")) end s(node, :resbody, exceptions).concat(node.statements.nil? ? [nil] : visit_all(node.statements.body)) end
begin; rescue; end ^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1591 def visit_rest_parameter_node(node) :"*#{node.name}" end
def foo(*bar); end ^^^^ def foo(*); end ^
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# File lib/prism/translation/ruby_parser.rb, line 1599 def visit_retry_node(node) s(node, :retry) end
retry ^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1610 def visit_return_node(node) if node.arguments.nil? s(node, :return) elsif node.arguments.arguments.length == 1 argument = node.arguments.arguments.first s(node, :return, argument.is_a?(SplatNode) ? s(node, :svalue, visit(argument)) : visit(argument)) else s(node, :return, s(node, :array).concat(visit_all(node.arguments.arguments))) end end
return ^^^^^^ return 1 ^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1625 def visit_self_node(node) s(node, :self) end
self ^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1638 def visit_singleton_class_node(node) s(node, :sclass, visit(node.expression)).tap do |sexp| sexp << node.body.accept(copy_compiler(in_def: false)) unless node.body.nil? end end
class << self; end ^^^^^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1648 def visit_source_encoding_node(node) # TODO s(node, :colon2, s(node, :const, :Encoding), :UTF_8) end
__ENCODING__ ^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1657 def visit_source_file_node(node) s(node, :str, node.filepath) end
__FILE__ ^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1665 def visit_source_line_node(node) s(node, :lit, node.location.start_line) end
__LINE__ ^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1679 def visit_splat_node(node) if node.expression.nil? s(node, :splat) else s(node, :splat, visit(node.expression)) end end
foo(*bar) ^^^^ def foo((bar, *baz)); end ^^^^ def foo(*); bar(*); end ^
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# File lib/prism/translation/ruby_parser.rb, line 1688 def visit_statements_node(node) first, *rest = node.body if rest.empty? visit(first) else s(node, :block).concat(visit_all(node.body)) end end
A list of statements.
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# File lib/prism/translation/ruby_parser.rb, line 1702 def visit_string_node(node) unescaped = node.unescaped if node.forced_binary_encoding? unescaped = unescaped.dup unescaped.force_encoding(Encoding::BINARY) end s(node, :str, unescaped) end
"foo" ^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1717 def visit_super_node(node) arguments = node.arguments&.arguments || [] block = node.block if block.is_a?(BlockArgumentNode) arguments << block block = nil end visit_block(node, s(node, :super).concat(visit_all(arguments)), block) end
super(foo) ^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1733 def visit_symbol_node(node) node.value == "!@" ? s(node, :lit, :"!@") : s(node, :lit, node.unescaped.to_sym) end
:foo ^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1741 def visit_true_node(node) s(node, :true) end
true ^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1749 def visit_undef_node(node) names = node.names.map { |name| s(node, :undef, visit(name)) } names.length == 1 ? names.first : s(node, :block).concat(names) end
undef foo ^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1761 def visit_unless_node(node) s(node, :if, visit(node.predicate), visit(node.else_clause), visit(node.statements)) end
unless foo; bar end ^^^^^^^^^^^^^^^^^^^ bar unless foo ^^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1772 def visit_until_node(node) s(node, :until, visit(node.predicate), visit(node.statements), !node.begin_modifier?) end
until foo; bar end ^^^^^^^^^^^^^^^^^ bar until foo ^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1780 def visit_when_node(node) s(node, :when, s(node, :array).concat(visit_all(node.conditions))).concat(node.statements.nil? ? [nil] : visit_all(node.statements.body)) end
case foo; when bar; end ^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1791 def visit_while_node(node) s(node, :while, visit(node.predicate), visit(node.statements), !node.begin_modifier?) end
while foo; bar end ^^^^^^^^^^^^^^^^^^ bar while foo ^^^^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1799 def visit_x_string_node(node) result = s(node, :xstr, node.unescaped) if node.heredoc? result.line = node.content_loc.start_line result.line_max = node.content_loc.end_line end result end
`foo` ^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1817 def visit_yield_node(node) s(node, :yield).concat(visit_all(node.arguments&.arguments || [])) end
yield ^^^^^ yield 1 ^^^^^^^
Private Instance Methods
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# File lib/prism/translation/ruby_parser.rb, line 481 def class_variable_write_type in_def ? :cvasgn : :cvdecl end
If a class variable is written within a method definition, it has a different type than everywhere else.
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# File lib/prism/translation/ruby_parser.rb, line 1824 def copy_compiler(in_def: self.in_def, in_pattern: self.in_pattern) Compiler.new(file, in_def: in_def, in_pattern: in_pattern) end
Create a new compiler with the given options.
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# File lib/prism/translation/ruby_parser.rb, line 364 def op_asgn?(node) node.call_operator == "::" || (node.value.is_a?(CallNode) && node.value.opening_loc.nil? && !node.value.arguments.nil?) end
Call nodes with operators following them will either be op_asgn or op_asgn2 nodes. That is determined by their call operator and their right-hand side.
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# File lib/prism/translation/ruby_parser.rb, line 370 def op_asgn_type(node, type) node.safe_navigation? ? :"safe_#{type}" : type end
Call nodes with operators following them can use &. as an operator, which changes their type by prefixing “safe_”.
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# File lib/prism/translation/ruby_parser.rb, line 1829 def s(node, *arguments) result = Sexp.new(*arguments) result.file = file result.line = node.location.start_line result.line_max = node.location.end_line result end
Create a new Sexp object from the given prism node and arguments.
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# File lib/prism/translation/ruby_parser.rb, line 1839 def visit_block(node, sexp, block) if block.nil? sexp else parameters = case block.parameters when nil, ItParametersNode, NumberedParametersNode 0 else visit(block.parameters) end if block.body.nil? s(node, :iter, sexp, parameters) else s(node, :iter, sexp, parameters, visit(block.body)) end end end
Visit a block node, which will modify the AST by wrapping the given visited node in an iter node.
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# File lib/prism/translation/ruby_parser.rb, line 1425 def visit_destructured_parameter(node) children = [*node.lefts, *node.rest, *node.rights].map do |child| case child when RequiredParameterNode visit(child) when MultiTargetNode visit_destructured_parameter(child) when SplatNode :"*#{child.expression&.name}" else raise end end s(node, :masgn).concat(children) end
def foo((bar, baz)); end ^^^^^^^^^^
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# File lib/prism/translation/ruby_parser.rb, line 1051 def visit_interpolated_parts(parts) visited = [] parts.each do |part| result = visit(part) if result[0] == :evstr && result[1] if result[1][0] == :str visited << result[1] elsif result[1][0] == :dstr visited.concat(result[1][1..-1]) else visited << result end visited << :space elsif result[0] == :dstr if !visited.empty? && part.parts[0].is_a?(StringNode) # If we are in the middle of an implicitly concatenated string, # we should not have a bare string as the first part. In this # case we need to visit just that first part and then we can # push the rest of the parts onto the visited array. result[1] = visit(part.parts[0]) end visited.concat(result[1..-1]) else visited << result end end state = :beginning #: :beginning | :string_content | :interpolated_content results = [] visited.each_with_index do |result, index| case state when :beginning if result.is_a?(String) results << result state = :string_content elsif result.is_a?(Array) && result[0] == :str results << result[1] state = :string_content else results << "" results << result state = :interpolated_content end when :string_content if result == :space # continue elsif result.is_a?(String) results[0] = "#{results[0]}#{result}" elsif result.is_a?(Array) && result[0] == :str results[0] = "#{results[0]}#{result[1]}" else results << result state = :interpolated_content end when :interpolated_content if result == :space # continue elsif visited[index - 1] != :space && result.is_a?(Array) && result[0] == :str && results[-1][0] == :str && (results[-1].line_max == result.line) results[-1][1] = "#{results[-1][1]}#{result[1]}" results[-1].line_max = result.line_max else results << result end end end results end
Visit the interpolated content of the string-like node.
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# File lib/prism/translation/ruby_parser.rb, line 1860 def visit_pattern_constant(node) case node when nil # nothing when ConstantReadNode visit(node) else s(node, :const, visit(node)) end end
Pattern
constants get wrapped in another layer of :const.
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# File lib/prism/translation/ruby_parser.rb, line 1509 def visit_range_bounds_node(node) if node.is_a?(ParenthesesNode) && node.body.nil? s(node, :begin) else visit(node) end end
If the bounds of a range node are empty parentheses, then they do not get replaced by their usual s(:nil), but instead are s(:begin).
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# File lib/prism/translation/ruby_parser.rb, line 1874 def visit_write_value(node) if node.is_a?(ArrayNode) && node.opening_loc.nil? if node.elements.length == 1 && node.elements.first.is_a?(SplatNode) s(node, :svalue, visit(node.elements.first)) else s(node, :svalue, visit(node)) end else visit(node) end end
Visit the value of a write, which will be on the right-hand side of a write operator. Because implicit arrays can have splats, those could potentially be wrapped in an svalue node.