[pseudo] Tweak some docs, NFC

Consitently use the "nonterminal", "pseudoparser" terms.

clang-tools-extra/pseudo/include/clang-pseudo/Grammar.h

@@ -1,4 +1,4 @@
-//===--- Grammar.h - grammar used by clang pseudo parser  --------*- C++-*-===//
+//===--- Grammar.h - grammar used by clang pseudoparser  ---------*- C++-*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -17,7 +17,7 @@
 //
 //  A grammar formally describes a language, and it is constructed by a set of
 //  production rules. A rule is of BNF form (AAA := BBB CCC). A symbol is either
-//  non-terminal or terminal, identified by a SymbolID.
+//  nonterminal or terminal, identified by a SymbolID.
 //
 //  Notions about the BNF grammar:
 //  - "_" is the start symbol of the augmented grammar;
@@ -45,8 +45,8 @@
 
 namespace clang {
 namespace pseudo {
-// A SymbolID uniquely identifies a terminal/non-terminal symbol in a grammar.
+// A SymbolID uniquely identifies a terminal/nonterminal symbol in a grammar.
-// Non-terminal IDs are indexes into a table of non-terminal symbols.
+// nonterminal IDs are indexes into a table of nonterminal symbols.
 // Terminal IDs correspond to the clang TokenKind enum.
 using SymbolID = uint16_t;
 // SymbolID is only 12 bits wide.
@@ -120,11 +120,11 @@ public:
   // Returns the SymbolID of the start symbol '_'.
   SymbolID startSymbol() const { return StartSymbol; };
 
-  // Returns all rules of the given non-terminal symbol.
+  // Returns all rules of the given nonterminal symbol.
   llvm::ArrayRef<Rule> rulesFor(SymbolID SID) const;
   const Rule &lookupRule(RuleID RID) const;
 
-  // Gets symbol (terminal or non-terminal) name.
+  // Gets symbol (terminal or nonterminal) name.
   // Terminals have names like "," (kw_comma) or "OPERATOR" (kw_operator).
   llvm::StringRef symbolName(SymbolID) const;
 
@@ -157,7 +157,7 @@ struct GrammarTable {
 
   struct Nonterminal {
     std::string Name;
-    // Corresponding rules that construct the non-terminal, it is a [Start, End)
+    // Corresponding rules that construct the nonterminal, it is a [Start, End)
     // index range of the Rules table.
     struct {
       RuleID Start;

clang-tools-extra/pseudo/include/clang-pseudo/LRTable.h

@@ -18,10 +18,10 @@
 //
 //  Typically, based on the category of the grammar symbol, the LRTable is
 //  broken into two logically separate tables:
-//    - ACTION table with terminals as columns -- e.g ACTION[S, a] specifies
+//    - ACTION table with terminals as columns -- e.g. ACTION[S, a] specifies
 //      next action (shift/reduce/accept/error) on state S under a lookahead
 //      terminal a
-//    - GOTO table with nonterminals as columns -- e.g. GOTO[S, X] specify
+//    - GOTO table with nonterminals as columns -- e.g. GOTO[S, X] specifies
 //      the state which we transist to from the state S with the nonterminal X
 //
 //  LRTable is *performance-critial* as it is consulted frequently during a
@@ -161,7 +161,7 @@ private:
 
   // Index is nonterminal SymbolID, value is the offset into States/Actions
   // where the entries for this nonterminal begin.
-  // Give a non-terminal id, the corresponding half-open range of StateIdx is
+  // Give a nonterminal id, the corresponding half-open range of StateIdx is
   // [NontermIdx[id], NontermIdx[id+1]).
   std::vector<uint32_t> NontermOffset;
   // Similar to NontermOffset, but for terminals, index is tok::TokenKind.

clang-tools-extra/pseudo/lib/Grammar.cpp

@@ -1,4 +1,4 @@
-//===--- Grammar.cpp - Grammar for clang pseudo parser  ----------*- C++-*-===//
+//===--- Grammar.cpp - Grammar for clang pseudoparser  -----------*- C++-*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -118,7 +118,7 @@ std::vector<llvm::DenseSet<SymbolID>> followSets(const Grammar &G) {
   auto FirstSets = firstSets(G);
   std::vector<llvm::DenseSet<SymbolID>> FollowSets(
       G.table().Nonterminals.size());
-  // Expand the follow set of a non-terminal symbol Y by adding all from the
+  // Expand the follow set of a nonterminal symbol Y by adding all from the
   // given symbol set.
   auto ExpandFollowSet = [&FollowSets](SymbolID Y,
                                        const llvm::DenseSet<SymbolID> &ToAdd) {

clang-tools-extra/pseudo/lib/cxx.bnf

@@ -8,8 +8,8 @@
 # It aims to align with the ISO C++ grammar as much as possible. We adjust it
 # to fit the need for the grammar-based parser:
 #  - attributes are omitted, which will be handled as comments;
-#  - we don't allow nullable non-terminal symbols. There are few nullable
+#  - we don't allow nullable nonterminal symbols. There are few nullable
-#    non-terminals in the spec grammar, they are adjusted to be non-nullable;
+#    nonterminals in the spec grammar, they are adjusted to be non-nullable;
 #  - the file merely describes the core C++ grammar. Preprocessor directives and
 #    lexical conversions are omitted as we reuse clang's lexer and run a fake
 #    preprocessor;
@@ -18,7 +18,7 @@
 #    and right shift operator;
 #
 # Guidelines:
-#   - non-terminals are lower_case; terminals (aka tokens) correspond to
+#   - nonterminals are lower_case; terminals (aka tokens) correspond to
 #     clang::TokenKind, written as "IDENTIFIER", "USING", "::" etc;
 #   - optional symbols are supported, with a _opt suffix;
 #
@@ -706,7 +706,7 @@ string-literal-chunk := UTF16_STRING_LITERAL
 string-literal-chunk := UTF32_STRING_LITERAL
 #! Technically, string concatenation happens at phase 6 which is before parsing,
 #! so it doesn't belong to the grammar. However, we extend the grammar to
-#! support it, to make the pseudo parser fully functional on practical code.
+#! support it, to make the pseudoparser fully functional on practical code.
 string-literal := string-literal-chunk
 string-literal := string-literal string-literal-chunk
 user-defined-literal := user-defined-integer-literal

clang-tools-extra/pseudo/tool/ClangPseudo.cpp

@@ -1,4 +1,4 @@
-//===-- ClangPseudo.cpp - Clang pseudo parser tool ------------------------===//
+//===-- ClangPseudo.cpp - Clang pseudoparser tool -------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.