Less code modifications. More steep:ignore for now

lib/prism/parse_result.rb

@@ -168,13 +168,13 @@ def inspect
 
     # The source code that this location represents.
     def slice
-      source!.slice(start_offset, length)
+      source.slice(start_offset, length)
     end
 
     # The character offset from the beginning of the source where this location
     # starts.
     def start_character_offset
-      source!.character_offset(start_offset)
+      source.character_offset(start_offset)
     end
 
     # The offset from the start of the file in code units of the given encoding.
@@ -190,7 +190,7 @@ def end_offset
     # The character offset from the beginning of the source where this location
     # ends.
     def end_character_offset
-      source!.character_offset(end_offset)
+      source.character_offset(end_offset)
     end
 
     # The offset from the start of the file in code units of the given encoding.
@@ -200,30 +200,30 @@ def end_code_units_offset(encoding = Encoding::UTF_16LE)
 
     # The line number where this location starts.
     def start_line
-      source!.line(start_offset)
+      source.line(start_offset)
     end
 
     # The content of the line where this location starts before this location.
     def start_line_slice
-      offset = source!.line_start(start_offset)
-      source!.slice(offset, start_offset - offset)
+      offset = source.line_start(start_offset)
+      source.slice(offset, start_offset - offset)
     end
 
     # The line number where this location ends.
     def end_line
-      source!.line(end_offset)
+      source.line(end_offset)
     end
 
     # The column number in bytes where this location starts from the start of
     # the line.
     def start_column
-      source!.column(start_offset)
+      source.column(start_offset)
     end
 
     # The column number in characters where this location ends from the start of
     # the line.
     def start_character_column
-      source!.character_column(start_offset)
+      source.character_column(start_offset)
     end
 
     # The column number in code units of the given encoding where this location
@@ -235,13 +235,13 @@ def start_code_units_column(encoding = Encoding::UTF_16LE)
     # The column number in bytes where this location ends from the start of the
     # line.
     def end_column
-      source!.column(end_offset)
+      source.column(end_offset)
     end
 
     # The column number in characters where this location ends from the start of
     # the line.
     def end_character_column
-      source!.character_column(end_offset)
+      source.character_column(end_offset)
     end
 
     # The column number in code units of the given encoding where this location
@@ -281,14 +281,7 @@ def join(other)
     # the beginning of the file. Useful for when you want a location object but
     # do not care where it points.
     def self.null
-      new(nil, 0, 0)
-    end
-
-    private
-
-    # Access the associated source, raising if not present.
-    def source!
-      source or raise "Missing source"
+      new(nil, 0, 0) # steep:ignore
     end
   end
 

lib/prism/pattern.rb

@@ -84,7 +84,7 @@ def compile
     # matches the pattern. If no block is given, an enumerator will be returned
     # that will yield each node that matches the pattern.
     def scan(root)
-      return to_enum(__method__ || raise, root) unless block_given?
+      return to_enum(:scan, root) unless block_given?
 
       @compiled ||= compile
       queue = [root]
@@ -182,8 +182,7 @@ def compile_hash_pattern_node(node)
       preprocessed =
         node.elements.to_h do |element|
           key = element.key
-          if key.respond_to?(:unescaped)
-            # @type var key: SymbolNode
+          if key.is_a?(SymbolNode)
             [key.unescaped.to_sym, compile_node(element.value)]
           else
             raise CompilationError, element.inspect

sig/prism/parse_result.rbs

@@ -16,17 +16,17 @@ module Prism
   end
 
   class Location
-    attr_reader source: Source?
+    attr_reader source: Source
     attr_reader start_offset: Integer
     attr_reader length: Integer
 
-    def initialize: (Source? source, Integer start_offset, Integer length) -> void
+    def initialize: (Source source, Integer start_offset, Integer length) -> void
     def leading_comments: () -> Array[comment]
     def leading_comment: (comment) -> void
     def trailing_comments: () -> Array[comment]
     def trailing_comment: (comment) -> void
     def comments: () -> Array[comment]
-    def copy: (?source: Source?, ?start_offset: Integer, ?length: Integer) -> Location
+    def copy: (?source: Source, ?start_offset: Integer, ?length: Integer) -> Location
     def slice: () -> String
     def start_character_offset: () -> Integer
     def end_offset: () -> Integer

templates/lib/prism/dsl.rb.erb

@@ -36,7 +36,7 @@ module Prism
 
     # Create a new Location object
     def Location(source = nil, start_offset = 0, length = 0)
-      Location.new(source, start_offset, length)
+      Location.new(source, start_offset, length) # steep:ignore
     end
     <%- nodes.each do |node| -%>