mozilla / rust-code-analysis - Conditional Complexity

Intro

Conditional complexity (also called cyclomatic complexity) is a term used to measure the complexity of software. The term refers to the number of possible paths through a program function. A higher value ofter means higher maintenance and testing costs (infosecinstitute.com).
Conditional complexity is calculated by counting all conditions in the program that can affect the execution path (e.g. if statement, loops, switches, and/or operators, try and catch blocks...).
Conditional complexity is measured at the unit level (methods, functions...).
Units are classified in four categories based on the measured McCabe index: 1-5 (simple units), 6-10 (medium complex units), 11-25 (complex units), 26+ (very complex units).

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Conditional Complexity Overall

There are 667 units with 14,390 lines of code in units (48.2% of code).

2 very complex units (855 lines of code)
2 complex units (128 lines of code)
16 medium complex units (949 lines of code)
42 simple units (1,247 lines of code)
605 very simple units (11,211 lines of code)

Legend:

51+

26-50

11-25

6-10

1-5

Alternative Visuals

3D view of all units

Conditional Complexity per Extension

51+

26-50

11-25

6-10

1-5

Conditional Complexity per Logical Component

primary logical decomposition

51+

26-50

11-25

6-10

1-5

Most Complex Units

Top 50 most complex units

Unit	# lines	McCabe index	# params
static bool ts_lex() in tree-sitter-preproc/src/parser.c	684	429	2
static bool ts_lex() in tree-sitter-ccomment/src/parser.c	171	120	2
static bool scan_automatic_semicolon() in tree-sitter-mozjs/src/scanner.c	88	42	3
fn java_if_multiple_conditions() in src/metrics/abc.rs	40	31	0
fn compute() in src/metrics/abc.rs	157	25	2
fn java_if_single_conditions() in src/metrics/abc.rs	50	23	0
static WhitespaceResult scan_whitespace_and_comments() in tree-sitter-mozjs/src/scanner.c	43	19	3
fn act_on_file() in rust-code-analysis-cli/src/main.rs	85	18	2
bool scan() in tree-sitter-ccomment/src/scanner.cc	46	17	2
bool scan() in tree-sitter-preproc/src/scanner.cc	46	17	2
fn rust_not_booleans() in src/metrics/cognitive.rs	62	16	0
bool tree_sitter_mozjs_external_scanner_scan() in tree-sitter-mozjs/src/scanner.c	27	15	3
fn explore() in src/concurrent_files.rs	50	15	5
static bool scan_html_comment() in tree-sitter-mozjs/src/scanner.c	31	14	1
fn main() in rust-code-analysis-cli/src/main.rs	102	14	0
fn java_while_and_do_while_conditions() in src/metrics/abc.rs	34	13	0
fn c_not_booleans() in src/metrics/cognitive.rs	42	13	0
fn mozjs_not_booleans() in src/metrics/cognitive.rs	42	13	0
fn dump_tree_helper() in src/output/dump.rs	81	13	8
def main() in split-minimal-tests.py	51	13	0
fn rust_sequence_same_booleans() in src/metrics/cognitive.rs	42	10	0
fn c_sequence_same_booleans() in src/metrics/cognitive.rs	42	10	0
fn mozjs_sequence_same_booleans() in src/metrics/cognitive.rs	42	10	0
static bool scan_raw_string_delimiter() in tree-sitter-mozcpp/src/scanner.c	23	10	2
static bool scan_jsx_text() in tree-sitter-mozjs/src/scanner.c	19	9	1
fn java_single_class() in src/metrics/wmc.rs	53	9	0
fn get_emacs_mode() in src/tools.rs	23	9	1
static bool scan_raw_string_content() in tree-sitter-mozcpp/src/scanner.c	27	9	2
fn java_for_with_variable_declaration() in src/metrics/abc.rs	33	8	0
fn get_func_space_name Option() in src/getter.rs	46	8	0
static bool scan_template_chars() in tree-sitter-mozjs/src/scanner.c	22	7	1
static bool scan_ternary_qmark() in tree-sitter-mozjs/src/scanner.c	25	7	1
fn java_count_unary_conditions() in src/metrics/abc.rs	22	7	2
fn java_for_without_variable_declaration() in src/metrics/abc.rs	40	7	0
fn rust_simple_function() in src/metrics/cognitive.rs	25	7	0
fn c_simple_function() in src/metrics/cognitive.rs	25	7	0
fn mozjs_simple_function() in src/metrics/cognitive.rs	25	7	0
fn rust_1_level_nesting() in src/metrics/cognitive.rs	55	7	0
fn java_compound_conditions() in src/metrics/cognitive.rs	27	7	0
fn java_real_class() in src/metrics/cyclomatic.rs	49	7	0
fn first_occurrence() in src/node.rs	24	7	2
fn build() in src/ast.rs	43	7	3
static inline bool set_contains() in tree-sitter-mozjs/src/tree_sitter/parser.h	17	6	3
static inline bool set_contains() in tree-sitter-ccomment/src/tree_sitter/parser.h	17	6	3
static inline bool set_contains() in tree-sitter-preproc/src/tree_sitter/parser.h	17	6	3
fn java_switch_lloc() in src/metrics/loc.rs	49	6	0
fn java_ternary_conditions() in src/metrics/abc.rs	36	6	0
fn compute() in src/metrics/npm.rs	28	6	2
fn rust_sequence_different_booleans() in src/metrics/cognitive.rs	22	6	0
fn c_sequence_different_booleans() in src/metrics/cognitive.rs	22	6	0