diff --git a/toolchain/lex/tokenized_buffer.cpp b/toolchain/lex/tokenized_buffer.cpp
index d6eccc6fdcae..3ab3188d759a 100644
--- a/toolchain/lex/tokenized_buffer.cpp
+++ b/toolchain/lex/tokenized_buffer.cpp
@@ -20,10 +20,6 @@
 
 namespace Carbon::Lex {
 
-auto TokenizedBuffer::GetKind(TokenIndex token) const -> TokenKind {
-  return GetTokenInfo(token).kind();
-}
-
 auto TokenizedBuffer::GetLine(TokenIndex token) const -> LineIndex {
   return FindLineIndex(GetTokenInfo(token).byte_offset());
 }
@@ -159,16 +155,6 @@ auto TokenizedBuffer::GetMatchedOpeningToken(TokenIndex closing_token) const
   return closing_token_info.opening_token_index();
 }
 
-auto TokenizedBuffer::HasLeadingWhitespace(TokenIndex token) const -> bool {
-  return GetTokenInfo(token).has_leading_space();
-}
-
-auto TokenizedBuffer::HasTrailingWhitespace(TokenIndex token) const -> bool {
-  TokenIterator it(token);
-  ++it;
-  return it != tokens().end() && GetTokenInfo(*it).has_leading_space();
-}
-
 auto TokenizedBuffer::IsRecoveryToken(TokenIndex token) const -> bool {
   if (recovery_tokens_.empty()) {
     return false;
@@ -359,20 +345,6 @@ auto TokenizedBuffer::AddLine(LineInfo info) -> LineIndex {
   return LineIndex(static_cast<int>(line_infos_.size()) - 1);
 }
 
-auto TokenizedBuffer::GetTokenInfo(TokenIndex token) -> TokenInfo& {
-  return token_infos_[token.index];
-}
-
-auto TokenizedBuffer::GetTokenInfo(TokenIndex token) const -> const TokenInfo& {
-  return token_infos_[token.index];
-}
-
-auto TokenizedBuffer::AddToken(TokenInfo info) -> TokenIndex {
-  token_infos_.push_back(info);
-  expected_max_parse_tree_size_ += info.kind().expected_max_parse_tree_size();
-  return TokenIndex(static_cast<int>(token_infos_.size()) - 1);
-}
-
 auto TokenizedBuffer::CollectMemUsage(MemUsage& mem_usage,
                                       llvm::StringRef label) const -> void {
   mem_usage.Add(MemUsage::ConcatLabel(label, "allocator_"), allocator_);
diff --git a/toolchain/lex/tokenized_buffer.h b/toolchain/lex/tokenized_buffer.h
index da2ca1d1f18a..52641fbe60f1 100644
--- a/toolchain/lex/tokenized_buffer.h
+++ b/toolchain/lex/tokenized_buffer.h
@@ -477,6 +477,38 @@ using LexerDiagnosticEmitter = DiagnosticEmitter<const char*>;
 // A diagnostic emitter that uses tokens as its source of location information.
 using TokenDiagnosticEmitter = DiagnosticEmitter<TokenIndex>;
 
+inline auto TokenizedBuffer::GetKind(TokenIndex token) const -> TokenKind {
+  return GetTokenInfo(token).kind();
+}
+
+inline auto TokenizedBuffer::HasLeadingWhitespace(TokenIndex token) const
+    -> bool {
+  return GetTokenInfo(token).has_leading_space();
+}
+
+inline auto TokenizedBuffer::HasTrailingWhitespace(TokenIndex token) const
+    -> bool {
+  TokenIterator it(token);
+  ++it;
+  return it != tokens().end() && GetTokenInfo(*it).has_leading_space();
+}
+
+inline auto TokenizedBuffer::GetTokenInfo(TokenIndex token) -> TokenInfo& {
+  return token_infos_[token.index];
+}
+
+inline auto TokenizedBuffer::GetTokenInfo(TokenIndex token) const
+    -> const TokenInfo& {
+  return token_infos_[token.index];
+}
+
+inline auto TokenizedBuffer::AddToken(TokenInfo info) -> TokenIndex {
+  TokenIndex index(token_infos_.size());
+  token_infos_.push_back(info);
+  expected_max_parse_tree_size_ += info.kind().expected_max_parse_tree_size();
+  return index;
+}
+
 }  // namespace Carbon::Lex
 
 #endif  // CARBON_TOOLCHAIN_LEX_TOKENIZED_BUFFER_H_
diff --git a/toolchain/parse/context.cpp b/toolchain/parse/context.cpp
index 3d9a557353a8..31312fd42f48 100644
--- a/toolchain/parse/context.cpp
+++ b/toolchain/parse/context.cpp
@@ -66,16 +66,6 @@ Context::Context(Tree& tree, Lex::TokenizedBuffer& tokens,
                tokens_->GetKind(*end_));
 }
 
-auto Context::AddLeafNode(NodeKind kind, Lex::TokenIndex token, bool has_error)
-    -> void {
-  tree_->node_impls_.push_back(Tree::NodeImpl(kind, has_error, token));
-}
-
-auto Context::AddNode(NodeKind kind, Lex::TokenIndex token, bool has_error)
-    -> void {
-  tree_->node_impls_.push_back(Tree::NodeImpl(kind, has_error, token));
-}
-
 auto Context::ReplacePlaceholderNode(int32_t position, NodeKind kind,
                                      Lex::TokenIndex token, bool has_error)
     -> void {
@@ -143,13 +133,6 @@ auto Context::ConsumeChecked(Lex::TokenKind kind) -> Lex::TokenIndex {
   return Consume();
 }
 
-auto Context::ConsumeIf(Lex::TokenKind kind) -> std::optional<Lex::TokenIndex> {
-  if (!PositionIs(kind)) {
-    return std::nullopt;
-  }
-  return Consume();
-}
-
 auto Context::FindNextOf(std::initializer_list<Lex::TokenKind> desired_kinds)
     -> std::optional<Lex::TokenIndex> {
   auto new_position = position_;
diff --git a/toolchain/parse/context.h b/toolchain/parse/context.h
index a8ae5b09b329..ec594adfcd50 100644
--- a/toolchain/parse/context.h
+++ b/toolchain/parse/context.h
@@ -97,10 +97,14 @@ class Context {
 
   // Adds a node to the parse tree that has no children (a leaf).
   auto AddLeafNode(NodeKind kind, Lex::TokenIndex token, bool has_error = false)
-      -> void;
+      -> void {
+    tree_->node_impls_.push_back(Tree::NodeImpl(kind, has_error, token));
+  }
 
   // Adds a node to the parse tree that has children.
-  auto AddNode(NodeKind kind, Lex::TokenIndex token, bool has_error) -> void;
+  auto AddNode(NodeKind kind, Lex::TokenIndex token, bool has_error) -> void {
+    tree_->node_impls_.push_back(Tree::NodeImpl(kind, has_error, token));
+  }
 
   // Replaces the placeholder node at the indicated position with a leaf node.
   //
@@ -154,7 +158,12 @@ class Context {
 
   // If the current position's token matches this `Kind`, returns it and
   // advances to the next position. Otherwise returns an empty optional.
-  auto ConsumeIf(Lex::TokenKind kind) -> std::optional<Lex::TokenIndex>;
+  auto ConsumeIf(Lex::TokenKind kind) -> std::optional<Lex::TokenIndex> {
+    if (!PositionIs(kind)) {
+      return std::nullopt;
+    }
+    return Consume();
+  }
 
   // Find the next token of any of the given kinds at the current bracketing
   // level.