1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
# frozen_string_literal: true
# :markup: markdown
module Prism
class ParseResult < Result
# The :line tracepoint event gets fired whenever the Ruby VM encounters an
# expression on a new line. The types of expressions that can trigger this
# event are:
#
# * if statements
# * unless statements
# * nodes that are children of statements lists
#
# In order to keep track of the newlines, we have a list of offsets that
# come back from the parser. We assign these offsets to the first nodes that
# we find in the tree that are on those lines.
#
# Note that the logic in this file should be kept in sync with the Java
# MarkNewlinesVisitor, since that visitor is responsible for marking the
# newlines for JRuby/TruffleRuby.
#
# This file is autoloaded only when `mark_newlines!` is called, so the
# re-opening of the various nodes in this file will only be performed in
# that case. We do that to avoid storing the extra `@newline` instance
# variable on every node if we don't need it.
class Newlines < Visitor
# Create a new Newlines visitor with the given newline offsets.
def initialize(lines)
# @type var lines: Integer
@lines = Array.new(1 + lines, false)
end
# Permit block/lambda nodes to mark newlines within themselves.
def visit_block_node(node)
old_lines = @lines
@lines = Array.new(old_lines.size, false)
begin
super(node)
ensure
@lines = old_lines
end
end
alias_method :visit_lambda_node, :visit_block_node
# Mark if/unless nodes as newlines.
def visit_if_node(node)
node.newline_flag!(@lines)
super(node)
end
alias_method :visit_unless_node, :visit_if_node
# Permit statements lists to mark newlines within themselves.
def visit_statements_node(node)
node.body.each do |child|
child.newline_flag!(@lines)
end
super(node)
end
end
end
class Node
def newline_flag? # :nodoc:
!!defined?(@newline_flag)
end
def newline_flag!(lines) # :nodoc:
line = location.start_line
unless lines[line]
lines[line] = true
@newline_flag = true
end
end
end
class BeginNode < Node
def newline_flag!(lines) # :nodoc:
# Never mark BeginNode with a newline flag, mark children instead.
end
end
class ParenthesesNode < Node
def newline_flag!(lines) # :nodoc:
# Never mark ParenthesesNode with a newline flag, mark children instead.
end
end
class IfNode < Node
def newline_flag!(lines) # :nodoc:
predicate.newline_flag!(lines)
end
end
class UnlessNode < Node
def newline_flag!(lines) # :nodoc:
predicate.newline_flag!(lines)
end
end
class UntilNode < Node
def newline_flag!(lines) # :nodoc:
predicate.newline_flag!(lines)
end
end
class WhileNode < Node
def newline_flag!(lines) # :nodoc:
predicate.newline_flag!(lines)
end
end
class RescueModifierNode < Node
def newline_flag!(lines) # :nodoc:
expression.newline_flag!(lines)
end
end
class InterpolatedMatchLastLineNode < Node
def newline_flag!(lines) # :nodoc:
first = parts.first
first.newline_flag!(lines) if first
end
end
class InterpolatedRegularExpressionNode < Node
def newline_flag!(lines) # :nodoc:
first = parts.first
first.newline_flag!(lines) if first
end
end
class InterpolatedStringNode < Node
def newline_flag!(lines) # :nodoc:
first = parts.first
first.newline_flag!(lines) if first
end
end
class InterpolatedSymbolNode < Node
def newline_flag!(lines) # :nodoc:
first = parts.first
first.newline_flag!(lines) if first
end
end
class InterpolatedXStringNode < Node
def newline_flag!(lines) # :nodoc:
first = parts.first
first.newline_flag!(lines) if first
end
end
end
|
