add (& somewhat test!) GNUful conditionals

1 files changed, 21 insertions, 0 deletions

diff --git a/src/makefile/token.rs b/src/makefile/token.rs
index 811f30f..86c442b 100644
--- a/src/makefile/token.rs
+++ b/src/makefile/token.rs
@@ -47,6 +47,13 @@ impl TokenString {
         None
     }
 
+    pub(crate) fn starts_with(&self, pattern: &str) -> bool {
+        match self.0.first() {
+            Some(Token::Text(t)) => t.starts_with(pattern),
+            _ => false,
+        }
+    }
+
     pub(crate) fn ends_with(&self, pattern: &str) -> bool {
         match self.0.last() {
             Some(Token::Text(t)) => t.ends_with(pattern),
@@ -54,6 +61,14 @@ impl TokenString {
         }
     }
 
+    pub(crate) fn strip_prefix(&mut self, suffix: &str) {
+        if let Some(Token::Text(t)) = self.0.first_mut() {
+            if let Some(x) = t.strip_prefix(suffix) {
+                *t = x.into()
+            }
+        }
+    }
+
     pub(crate) fn strip_suffix(&mut self, suffix: &str) {
         if let Some(Token::Text(t)) = self.0.last_mut() {
             if let Some(x) = t.strip_suffix(suffix) {
@@ -71,6 +86,12 @@ impl TokenString {
             *t = t.trim_start().into();
         }
     }
+
+    pub(crate) fn trim_end(&mut self) {
+        if let Some(Token::Text(t)) = self.0.last_mut() {
+            *t = t.trim_end().into();
+        }
+    }
 }
 
 impl fmt::Display for TokenString {