diff options
Diffstat (limited to 'compiler/parser.nim')
| -rw-r--r-- | compiler/parser.nim | 43 |
1 files changed, 27 insertions, 16 deletions
diff --git a/compiler/parser.nim b/compiler/parser.nim index 14683e307..7a23ed6a9 100644 --- a/compiler/parser.nim +++ b/compiler/parser.nim @@ -27,7 +27,7 @@ when isMainModule: outp.close import - llstream, lexer, idents, strutils, ast, astalgo, msgs, options + llstream, lexer, idents, strutils, ast, astalgo, msgs, options, configuration type TParser* = object # A TParser object represents a file that @@ -97,7 +97,7 @@ proc openParser*(p: var TParser, fileIdx: FileIndex, inputStream: PLLStream, proc openParser*(p: var TParser, filename: string, inputStream: PLLStream, cache: IdentCache; config: ConfigRef; strongSpaces=false) = - openParser(p, filename.fileInfoIdx, inputStream, cache, config, strongSpaces) + openParser(p, fileInfoIdx(config, filename), inputStream, cache, config, strongSpaces) proc closeParser(p: var TParser) = ## Close a parser, freeing up its resources. @@ -107,9 +107,13 @@ proc parMessage(p: TParser, msg: TMsgKind, arg = "") = ## Produce and emit the parser message `arg` to output. lexMessageTok(p.lex, msg, p.tok, arg) -proc parMessage(p: TParser, msg: TMsgKind, tok: TToken) = +proc parMessage(p: TParser, msg: string, tok: TToken) = ## Produce and emit a parser message to output about the token `tok` - parMessage(p, msg, prettyTok(tok)) + parMessage(p, errGenerated, msg % prettyTok(tok)) + +proc parMessage(p: TParser, arg: string) = + ## Produce and emit the parser message `arg` to output. + lexMessageTok(p.lex, errGenerated, p.tok, arg) template withInd(p, body: untyped) = let oldInd = p.currInd @@ -142,6 +146,12 @@ proc skipComment(p: var TParser, node: PNode) = proc flexComment(p: var TParser, node: PNode) = if p.tok.indent < 0 or realInd(p): rawSkipComment(p, node) +const + errInvalidIndentation = "invalid indentation" + errIdentifierExpected = "identifier expected, but got '$1'" + errExprExpected = "expression expected, but found '$1'" + errTokenExpected = "'$1' expected" + proc skipInd(p: var TParser) = if p.tok.indent >= 0: if not realInd(p): parMessage(p, errInvalidIndentation) @@ -160,11 +170,11 @@ proc getTokNoInd(p: var TParser) = proc expectIdentOrKeyw(p: TParser) = if p.tok.tokType != tkSymbol and not isKeyword(p.tok.tokType): - lexMessage(p.lex, errIdentifierExpected, prettyTok(p.tok)) + lexMessage(p.lex, errGenerated, errIdentifierExpected % prettyTok(p.tok)) proc expectIdent(p: TParser) = if p.tok.tokType != tkSymbol: - lexMessage(p.lex, errIdentifierExpected, prettyTok(p.tok)) + lexMessage(p.lex, errGenerated, errIdentifierExpected % prettyTok(p.tok)) proc eat(p: var TParser, tokType: TTokType) = ## Move the parser to the next token if the current token is of type @@ -172,7 +182,8 @@ proc eat(p: var TParser, tokType: TTokType) = if p.tok.tokType == tokType: getTok(p) else: - lexMessageTok(p.lex, errTokenExpected, p.tok, TokTypeToStr[tokType]) + lexMessage(p.lex, errGenerated, + "expected " & TokTypeToStr[tokType] & ", but got: " & prettyTok(p.tok)) proc parLineInfo(p: TParser): TLineInfo = ## Retrieve the line information associated with the parser's current state. @@ -878,7 +889,7 @@ proc parsePragma(p: var TParser): PNode = skipComment(p, a) optPar(p) if p.tok.tokType in {tkCurlyDotRi, tkCurlyRi}: getTok(p) - else: parMessage(p, errTokenExpected, ".}") + else: parMessage(p, "expected '.}'") dec p.inPragma proc identVis(p: var TParser; allowDot=false): PNode = @@ -939,7 +950,7 @@ proc parseIdentColonEquals(p: var TParser, flags: TDeclaredIdentFlags): PNode = else: addSon(result, newNodeP(nkEmpty, p)) if p.tok.tokType != tkEquals and withBothOptional notin flags: - parMessage(p, errColonOrEqualsExpected, p.tok) + parMessage(p, "':' or '=' expected, but got '$1'", p.tok) if p.tok.tokType == tkEquals: getTok(p) optInd(p, result) @@ -1012,7 +1023,7 @@ proc parseParamList(p: var TParser, retColon = true): PNode = parMessage(p, errGenerated, "the syntax is 'parameter: var T', not 'var parameter: T'") break else: - parMessage(p, errTokenExpected, ")") + parMessage(p, "expected closing ')'") break addSon(result, a) if p.tok.tokType notin {tkComma, tkSemiColon}: break @@ -1173,7 +1184,7 @@ proc primary(p: var TParser, mode: TPrimaryMode): PNode = if mode == pmTypeDef: result = parseTypeClass(p) else: - parMessage(p, errInvalidToken, p.tok) + parMessage(p, "the 'concept' keyword is only valid in 'type' sections") of tkStatic: let info = parLineInfo(p) getTokNoInd(p) @@ -1283,7 +1294,7 @@ proc postExprBlocks(p: var TParser, x: PNode): PNode = if nextBlock.kind == nkElse: break else: if openingParams.kind != nkEmpty: - parMessage(p, errTokenExpected, ":") + parMessage(p, "expected ':'") proc parseExprStmt(p: var TParser): PNode = #| exprStmt = simpleExpr @@ -1518,7 +1529,7 @@ proc parseTry(p: var TParser; isExpr: bool): PNode = addSon(b, parseStmt(p)) addSon(result, b) if b.kind == nkFinally: break - if b == nil: parMessage(p, errTokenExpected, "except") + if b == nil: parMessage(p, "expected 'except'") proc parseExceptBlock(p: var TParser, kind: TNodeKind): PNode = #| exceptBlock = 'except' colcom stmt @@ -1573,7 +1584,7 @@ proc parseAsm(p: var TParser): PNode = of tkTripleStrLit: addSon(result, newStrNodeP(nkTripleStrLit, p.tok.literal, p)) else: - parMessage(p, errStringLiteralExpected) + parMessage(p, "the 'asm' statement takes a string literal") addSon(result, ast.emptyNode) return getTok(p) @@ -1752,7 +1763,7 @@ proc parseEnum(p: var TParser): PNode = p.tok.tokType == tkEof: break if result.len <= 1: - lexMessageTok(p.lex, errIdentifierExpected, p.tok, prettyTok(p.tok)) + parMessage(p, errIdentifierExpected, p.tok) proc parseObjectPart(p: var TParser): PNode proc parseObjectWhen(p: var TParser): PNode = @@ -2115,7 +2126,7 @@ proc parseStmt(p: var TParser): PNode = case p.tok.tokType of tkIf, tkWhile, tkCase, tkTry, tkFor, tkBlock, tkAsm, tkProc, tkFunc, tkIterator, tkMacro, tkType, tkConst, tkWhen, tkVar: - parMessage(p, errComplexStmtRequiresInd) + parMessage(p, "complex statement requires indentation") result = ast.emptyNode else: if p.inSemiStmtList > 0: |