diff options
Diffstat (limited to 'tools/grammar_nanny.nim')
| -rw-r--r-- | tools/grammar_nanny.nim | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/tools/grammar_nanny.nim b/tools/grammar_nanny.nim index d07c2bf8c..cbdc51efc 100644 --- a/tools/grammar_nanny.nim +++ b/tools/grammar_nanny.nim @@ -3,8 +3,11 @@ import std / [strutils, sets] +when defined(nimPreviewSlimSystem): + import std/syncio + import ".." / compiler / [ - llstream, ast, lexer, options, msgs, idents, + llstream, lexer, options, msgs, idents, lineinfos, pathutils] proc checkGrammarFileImpl(cache: IdentCache, config: ConfigRef) = @@ -13,12 +16,12 @@ proc checkGrammarFileImpl(cache: IdentCache, config: ConfigRef) = var stream = llStreamOpen(data) var declaredSyms = initHashSet[string]() var usedSyms = initHashSet[string]() + usedSyms.incl "module" # 'module' is the start rule. if stream != nil: declaredSyms.incl "section" # special case for 'section(RULE)' in the grammar var - L: TLexer - tok: TToken - initToken(tok) + L: Lexer + tok: Token openLexer(L, f, stream, cache, config) # load the first token: rawGetTok(L, tok) @@ -35,6 +38,10 @@ proc checkGrammarFileImpl(cache: IdentCache, config: ConfigRef) = usedSyms.incl word else: rawGetTok(L, tok) + for u in declaredSyms: + if u notin usedSyms: + echo "Unused non-terminal: ", u + for u in usedSyms: if u notin declaredSyms: echo "Undeclared non-terminal: ", u |