identify literal glob patterns

#feat

Author: alandefreitas

include/mrdocs/Support/Glob.hpp

@@ -97,6 +97,16 @@ class GlobPattern {
     bool
     matchPatternPrefix(std::string_view prefix, char delimiter) const;
 
+    /** Checks if the glob pattern is a literal string.
+
+        This function determines if the glob pattern does not contain
+        any special characters. In other words, it matches a single string.
+
+        @return true if the glob pattern is a literal string, false otherwise.
+     */
+    bool
+    isLiteral() const;
+
     /** Returns the glob pattern.
 
         @return The glob pattern as a string view.
@@ -185,6 +195,19 @@ class PathGlobPattern {
         return glob_.matchPatternPrefix(prefix, '/');
     }
 
+    /** Checks if the glob pattern is a literal string.
+
+        This function determines if the glob pattern does not contain
+        any special characters. In other words, it matches a single string.
+
+        @return true if the glob pattern is a literal string, false otherwise.
+     */
+    bool
+    isLiteral() const
+    {
+        return glob_.isLiteral();
+    }
+
     /** Returns the glob pattern.
 
         @return The glob pattern as a string view.
@@ -276,6 +299,19 @@ class SymbolGlobPattern {
         return glob_.matchPatternPrefix(prefix, ':');
     }
 
+    /** Checks if the glob pattern is a literal string.
+
+        This function determines if the glob pattern does not contain
+        any special characters. In other words, it matches a single string.
+
+        @return true if the glob pattern is a literal string, false otherwise.
+     */
+    bool
+    isLiteral() const
+    {
+        return glob_.isLiteral();
+    }
+
     /** Returns the glob pattern.
 
         @return The glob pattern as a string view.

src/lib/Support/Glob.cpp

@@ -581,9 +581,9 @@ match(std::string_view const str, char const delimiter) const
 }
 
 bool
-GlobPattern::
-matchPatternPrefix(std::string_view const str, char const delimiter) const
-{
+GlobPattern::matchPatternPrefix(
+    std::string_view const str,
+    char const delimiter) const {
     if (!impl_)
     {
         return str.empty();
@@ -604,14 +604,25 @@ matchPatternPrefix(std::string_view const str, char const delimiter) const
     for (auto& subGlob: impl_->subGlobs)
     {
         if (auto m = subGlob.match(suffix, delimiter);
-            m == SubGlobPattern::MatchType::FULL || m == SubGlobPattern::MatchType::PARTIAL)
+            m == SubGlobPattern::MatchType::FULL
+            || m == SubGlobPattern::MatchType::PARTIAL)
         {
             return true;
         }
     }
     return false;
 }
 
+bool
+GlobPattern::isLiteral() const
+{
+    if (!impl_)
+    {
+        return true;
+    }
+    return impl_->subGlobs.empty();
+}
+
 std::string_view
 GlobPattern::
 pattern() const

src/test/Support/Glob.cpp

@@ -551,6 +551,38 @@ struct Glob_test
                 BOOST_TEST_NOT(glob.matchPatternPrefix("std"));
             }
         }
+
+        // isLiteral
+        {
+            // default constructed to empty string
+            {
+                PathGlobPattern glob;
+                BOOST_TEST(glob.isLiteral());
+                BOOST_TEST(glob.match(""));
+                BOOST_TEST_NOT(glob.match("a"));
+            }
+
+            // empty string
+            {
+                auto globExp = PathGlobPattern::create("");
+                BOOST_TEST(globExp);
+                PathGlobPattern const& glob = *globExp;
+                BOOST_TEST(glob.isLiteral());
+                BOOST_TEST(glob.match(""));
+                BOOST_TEST_NOT(glob.match("a"));
+            }
+
+            // literal string
+            {
+                auto globExp = PathGlobPattern::create("abc");
+                BOOST_TEST(globExp);
+                PathGlobPattern const& glob = *globExp;
+                BOOST_TEST(glob.isLiteral());
+                BOOST_TEST(glob.match("abc"));
+                BOOST_TEST_NOT(glob.match("abcd"));
+                BOOST_TEST_NOT(glob.match("a/b/c"));
+            }
+        }
     }
 };