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use super::super::types::{FunctionInfo, StructureInfo, StructureType, Visibility};
use super::LanguageAnalyzer;
use crate::utils::errors::Result;
/// MATLAB language complexity analyzer
pub struct MatlabAnalyzer;
impl MatlabAnalyzer {
pub fn new() -> Self {
Self
}
/// Extract function name from MATLAB function declaration
fn extract_function_name(&self, line: &str) -> Option<String> {
let trimmed = line.trim();
// Skip comments and empty lines
if trimmed.starts_with("%") || trimmed.is_empty() {
return None;
}
// Look for function declarations: function [output] = function_name(input)
if let Some(after_function) = trimmed.strip_prefix("function ") {
// Handle different function patterns
if let Some(equals_pos) = after_function.find('=') {
// Pattern: function [output] = function_name(input)
let after_equals = &after_function[equals_pos + 1..].trim();
if let Some(paren_pos) = after_equals.find('(') {
let func_name = after_equals[..paren_pos].trim();
if !func_name.is_empty()
&& func_name.chars().all(|c| c.is_alphanumeric() || c == '_')
{
return Some(func_name.to_string());
}
}
} else {
// Pattern: function function_name(input)
if let Some(paren_pos) = after_function.find('(') {
let func_name = after_function[..paren_pos].trim();
if !func_name.is_empty()
&& func_name.chars().all(|c| c.is_alphanumeric() || c == '_')
{
return Some(func_name.to_string());
}
} else {
// Pattern: function function_name
let parts: Vec<&str> = after_function.split_whitespace().collect();
if let Some(first_part) = parts.first() {
if !first_part.is_empty()
&& first_part.chars().all(|c| c.is_alphanumeric() || c == '_')
{
return Some(first_part.to_string());
}
}
}
}
}
None
}
/// Count complexity keywords in MATLAB code
fn count_complexity_keywords(&self, line: &str) -> usize {
let keywords = [
"if",
"elseif",
"else",
"for",
"while",
"switch",
"case",
"otherwise",
"&",
"|",
"&&",
"||",
"~",
"any",
"all",
"find",
"try",
"catch",
"error",
"warning",
"break",
"continue",
"return",
];
keywords
.iter()
.map(|&keyword| line.matches(keyword).count())
.sum()
}
/// Count cognitive complexity for MATLAB code
fn count_cognitive_complexity(&self, line: &str, nesting_level: usize) -> usize {
let mut complexity = 0;
let nesting_multiplier = nesting_level.max(1);
// Basic control structures
if line.contains("if ") || line.contains("if(") {
complexity += nesting_multiplier;
}
if line.contains("elseif ") {
complexity += 1;
}
if line.contains("else") && !line.contains("elseif") {
complexity += 1;
}
if line.contains("for ") || line.contains("for(") {
complexity += nesting_multiplier;
}
if line.contains("while ") || line.contains("while(") {
complexity += nesting_multiplier;
}
if line.contains("switch ") {
complexity += nesting_multiplier;
}
if line.contains("case ") {
complexity += 1;
}
if line.contains("otherwise") {
complexity += 1;
}
// Logical operators
complexity += line.matches("&&").count() * nesting_multiplier;
complexity += line.matches("||").count() * nesting_multiplier;
complexity += line.matches("&").count(); // Element-wise AND
complexity += line.matches("|").count(); // Element-wise OR
// Exception handling
if line.contains("try") {
complexity += 1;
}
if line.contains("catch") {
complexity += nesting_multiplier;
}
if line.contains("error(") {
complexity += 1;
}
if line.contains("warning(") {
complexity += 1;
}
// Control flow
if line.contains("break") {
complexity += 1;
}
if line.contains("continue") {
complexity += 1;
}
if line.contains("return") {
complexity += 1;
}
// MATLAB-specific complexity patterns
if line.contains("cellfun(") || line.contains("arrayfun(") || line.contains("structfun(") {
complexity += 1;
}
// Matrix operations complexity
if line.contains("*") || line.contains(".*") || line.contains("\\") || line.contains("./") {
complexity += 1;
}
// Complex indexing
if line.contains("(:") || line.contains(":,") || line.contains("end") {
complexity += 1;
}
// Function handles and anonymous functions
if line.contains("@") {
complexity += 1;
}
complexity
}
/// Check if line contains a function declaration
fn is_function_declaration(&self, line: &str) -> bool {
let trimmed = line.trim();
// Skip comments and empty lines
if trimmed.starts_with("%") || trimmed.is_empty() {
return false;
}
// Must start with "function "
trimmed.starts_with("function ")
}
/// Count parameters in function signature
fn count_parameters(&self, line: &str) -> usize {
if let Some(paren_start) = line.find('(') {
if let Some(paren_end) = line.find(')') {
let params = &line[paren_start + 1..paren_end];
if params.trim().is_empty() {
return 0;
}
// Count parameters by commas
let mut param_count = 1;
let mut paren_depth = 0;
let mut bracket_depth = 0;
let mut brace_depth = 0;
for ch in params.chars() {
match ch {
'(' => paren_depth += 1,
')' => paren_depth -= 1,
'[' => bracket_depth += 1,
']' => bracket_depth -= 1,
'{' => brace_depth += 1,
'}' => brace_depth -= 1,
',' if paren_depth == 0 && bracket_depth == 0 && brace_depth == 0 => {
param_count += 1;
}
_ => {}
}
}
return param_count;
}
}
0
}
}
impl LanguageAnalyzer for MatlabAnalyzer {
fn analyze_functions(&self, lines: &[String]) -> Result<Vec<FunctionInfo>> {
let mut functions = Vec::new();
let mut current_function: Option<FunctionInfo> = None;
let mut in_function = false;
let mut nesting_level: usize = 0;
let mut function_end_keywords = 0;
for (line_num, line) in lines.iter().enumerate() {
let trimmed = line.trim();
// Skip comments and empty lines
if trimmed.starts_with("%") || trimmed.is_empty() {
continue;
}
// Function declaration detection
if self.is_function_declaration(trimmed) {
if let Some(func_name) = self.extract_function_name(trimmed) {
let param_count = self.count_parameters(trimmed);
current_function = Some(FunctionInfo {
name: func_name,
line_count: 0,
cyclomatic_complexity: 1, // Base complexity
cognitive_complexity: 1, // Base cognitive complexity
nesting_depth: 0,
parameter_count: param_count,
return_path_count: 0,
start_line: line_num + 1,
end_line: line_num + 1,
is_method: false, // MATLAB functions are not methods by default
parent_class: None,
local_variable_count: 0,
has_recursion: false,
has_exception_handling: false,
visibility: Visibility::Public,
});
in_function = true;
nesting_level = 0;
function_end_keywords = 0;
}
}
if in_function {
if let Some(ref mut func) = current_function {
func.line_count += 1;
func.end_line = line_num + 1;
// Track nesting level
if trimmed.contains("if ")
|| trimmed.contains("for ")
|| trimmed.contains("while ")
|| trimmed.contains("switch ")
|| trimmed.contains("try")
{
nesting_level += 1;
}
if trimmed == "end" {
if nesting_level > 0 {
nesting_level -= 1;
} else {
function_end_keywords += 1;
}
}
func.nesting_depth = func.nesting_depth.max(nesting_level);
// Add complexity from keywords
let keyword_complexity = self.count_complexity_keywords(trimmed);
func.cyclomatic_complexity += keyword_complexity;
// Add cognitive complexity
let cognitive_complexity =
self.count_cognitive_complexity(trimmed, nesting_level);
func.cognitive_complexity += cognitive_complexity;
// Count return statements
if trimmed.contains("return") {
func.return_path_count += 1;
}
// Check for recursion
if trimmed.contains(&func.name) && trimmed.contains('(') {
func.has_recursion = true;
}
// Check for exception handling
if trimmed.contains("try")
|| trimmed.contains("catch")
|| trimmed.contains("error(")
|| trimmed.contains("warning(")
{
func.has_exception_handling = true;
}
// Count local variables (assignments)
if trimmed.contains("=")
&& !trimmed.contains("==")
&& !trimmed.contains("~=")
&& !trimmed.contains("<=")
&& !trimmed.contains(">=")
&& !trimmed.contains("function ")
{
func.local_variable_count += 1;
}
}
// End of function detection (MATLAB functions end with "end")
if function_end_keywords > 0 && nesting_level == 0 {
if let Some(func) = current_function.take() {
functions.push(func);
}
in_function = false;
function_end_keywords = 0;
}
}
}
Ok(functions)
}
fn analyze_structures(&self, lines: &[String]) -> Result<Vec<StructureInfo>> {
let mut structures = Vec::new();
// MATLAB doesn't have traditional classes in older versions, but we can analyze:
// 1. Scripts as modules
// 2. Class definitions (newer MATLAB)
// 3. Function files
// Create a default "script" structure to hold all functions
let mut script_structure = StructureInfo {
name: "MATLAB_Script".to_string(),
structure_type: StructureType::Class,
line_count: lines.len(),
start_line: 1,
end_line: lines.len(),
methods: Vec::new(),
properties: 0,
visibility: Visibility::Public,
inheritance_depth: 0,
interface_count: 0,
};
// Count global variables as properties
let mut global_vars = 0;
let mut has_class_definition = false;
for (line_num, line) in lines.iter().enumerate() {
let trimmed = line.trim();
// Skip comments and empty lines
if trimmed.starts_with("%") || trimmed.is_empty() {
continue;
}
// Check for class definition
if trimmed.starts_with("classdef ") {
has_class_definition = true;
// Extract class name
if let Some(class_name) = trimmed.strip_prefix("classdef ") {
let name = class_name
.split_whitespace()
.next()
.unwrap_or("UnknownClass");
script_structure.name = name.to_string();
script_structure.structure_type = StructureType::Class;
}
}
// Count global variable assignments
if trimmed.contains("=")
&& !trimmed.contains("==")
&& !trimmed.contains("~=")
&& !trimmed.contains("<=")
&& !trimmed.contains(">=")
&& !trimmed.contains("function ")
&& !has_class_definition
{
global_vars += 1;
}
// Count properties in class definition
if has_class_definition && trimmed.starts_with("properties") {
// Properties section found
script_structure.properties += 1;
}
// Add functions to the script structure
if self.is_function_declaration(trimmed) {
if let Some(func_name) = self.extract_function_name(trimmed) {
let param_count = self.count_parameters(trimmed);
let method_info = FunctionInfo {
name: func_name,
line_count: 0, // Would need separate tracking
cyclomatic_complexity: 1,
cognitive_complexity: 1,
nesting_depth: 0,
parameter_count: param_count,
return_path_count: 0,
start_line: line_num + 1,
end_line: line_num + 1,
is_method: has_class_definition,
parent_class: Some(script_structure.name.clone()),
local_variable_count: 0,
has_recursion: false,
has_exception_handling: false,
visibility: Visibility::Public,
};
script_structure.methods.push(method_info);
}
}
}
if !has_class_definition {
script_structure.properties = global_vars;
}
structures.push(script_structure);
Ok(structures)
}
}
impl Default for MatlabAnalyzer {
fn default() -> Self {
Self::new()
}
}