Module: SimpleCov::StaticCoverageExtractor::PrismCompat

Defined in:

lib/simplecov/static_coverage_extractor/prism_compat.rb

Overview

The Prism 1.3 (Dec 2024) accessor renames for the trailing clause of conditional nodes, resolved ONCE at load so the per-node hot paths stay branch-free. Ruby 3.3's stdlib Prism (0.19) predates the renames; 3.4+ and any installed prism gem post-dates them. Reaching for the modern name on 0.19 raised NoMethodError inside the extractor — call swallowed it and the whole file silently fell back to no simulated data (see the 1.0.2 audit).

This lives in its own file, required by every consumer, because the constants are referenced from several extractor files and defining them after those files were loaded worked only while the references happened at call time — a load-order trap for the next editor.

Constant Summary

IF_NODE_SUBSEQUENT_METHOD =

Prism::IfNode#subsequent was renamed from consequent. The not-taken arm on whichever Prism version we're on can't be exercised by our own dogfood (we only run on one Prism at a time). simplecov:disable

if ::Prism::IfNode.method_defined?(:subsequent)
  :subsequent
else
  :consequent
end

ELSE_CLAUSE_METHOD =

The same rename hit the else accessor on UnlessNode, CaseNode, and CaseMatchNode (all three: consequent -> else_clause). All three renamed together, so one constant (probed off CaseNode) covers them.

if ::Prism::CaseNode.method_defined?(:else_clause)
  :else_clause
else
  :consequent
end

Class Method Summary

• .else_clause(node) ⇒ Object
• .subsequent(node) ⇒ Object

  The else/elsif clause of an if-like node (an ElseNode, or a nested IfNode for elsif), or the else clause of anything else that has one, under whichever accessor this Prism exposes.

Class Method Details

.else_clause(node) ⇒ Object

# File 'lib/simplecov/static_coverage_extractor/prism_compat.rb', line 50

def else_clause(node)
  node.public_send(ELSE_CLAUSE_METHOD)
end

.subsequent(node) ⇒ Object

The else/elsif clause of an if-like node (an ElseNode, or a nested IfNode for elsif), or the else clause of anything else that has one, under whichever accessor this Prism exposes.

# File 'lib/simplecov/static_coverage_extractor/prism_compat.rb', line 46

def subsequent(node)
  node.is_a?(::Prism::IfNode) ? node.public_send(IF_NODE_SUBSEQUENT_METHOD) : else_clause(node)
end