exprs for dynlib; indentation parsing

doc/grammar.txt

@@ -8,7 +8,7 @@ operator ::= OP0 | OR | XOR | AND | OP3 | OP4 | OP5 | OP6 | OP7
 prefixOperator ::= OP0 | OP3 | OP4 | OP5 | OP6 | OP7 | 'not'
 
 optInd ::= [COMMENT] [IND]
-
+optPar ::= [IND] | [SAD]
 
 lowestExpr ::= orExpr (OP0 optInd orExpr)*
 orExpr ::= andExpr (OR | 'xor' optInd andExpr)*
@@ -21,16 +21,16 @@ dollarExpr ::= primary (OP7 optInd primary)*
 
 indexExpr ::= '..' [expr] | expr ['=' expr | '..' expr]
 
-castExpr ::= 'cast' '[' optInd typeDesc [SAD] ']' '(' optInd expr [SAD] ')'
+castExpr ::= 'cast' '[' optInd typeDesc optPar ']' '(' optInd expr optPar ')'
-addrExpr ::= 'addr' '(' optInd expr ')'
+addrExpr ::= 'addr' '(' optInd expr optPar ')'
 symbol ::= '`' (KEYWORD | IDENT | operator | '(' ')'
                | '[' ']' | '=' | literal)+ '`'
          | IDENT
          
 primaryPrefix ::= (prefixOperator | 'bind') optInd
 primarySuffix ::= '.' optInd symbol
-                | '(' optInd namedExprList [SAD] ')'
+                | '(' optInd namedExprList optPar ')'
-                | '[' optInd [indexExpr (comma indexExpr)* [comma]] [SAD] ']'
+                | '[' optInd [indexExpr (comma indexExpr)* [comma]] optPar ']'
                 | '^'
                 | pragma
 
@@ -44,9 +44,9 @@ literal ::= INT_LIT | INT8_LIT | INT16_LIT | INT32_LIT | INT64_LIT
           | NIL
 
 constructor ::= literal
-          | '[' optInd colonExprList [SAD] ']'
+          | '[' optInd colonExprList optPar ']'
-          | '{' optInd sliceExprList [SAD] '}'
+          | '{' optInd sliceExprList optPar '}'
-          | '(' optInd colonExprList [SAD] ')'
+          | '(' optInd colonExprList optPar ')'
 
 colonExpr ::= expr [':' expr]
 colonExprList ::= [colonExpr (comma colonExpr)* [comma]]
@@ -128,13 +128,13 @@ importStmt ::= 'import' filename (comma filename)*
 includeStmt ::= 'include' filename (comma filename)*
 fromStmt ::= 'from' filename 'import' symbol (comma symbol)*
 
-pragma ::= '{.' optInd (colonExpr [comma])* [SAD] ('.}' | '}')
+pragma ::= '{.' optInd (colonExpr [comma])* optPar ('.}' | '}')
 
 param ::= symbol (comma symbol)* (':' typeDesc ['=' expr] | '=' expr)
-paramList ::= ['(' [param (comma param)*] [SAD] ')'] [':' typeDesc]
+paramList ::= ['(' [param (comma param)*] optPar ')'] [':' typeDesc]
 
 genericParam ::= symbol [':' typeDesc] ['=' expr]
-genericParams ::= '[' genericParam (comma genericParam)* [SAD] ']'
+genericParams ::= '[' genericParam (comma genericParam)* optPar ']'
 
 
 routineDecl := symbol ['*'] [genericParams] paramList [pragma] ['=' stmt]
@@ -164,7 +164,7 @@ objectCase ::= 'case' expr ':' typeDesc [COMMENT]
 
 objectPart ::= objectWhen | objectCase | objectIdentPart | 'nil'
              | indPush objectPart (SAD objectPart)* DED indPop
-tupleDesc ::= '[' optInd [param (comma param)*] [SAD] ']'
+tupleDesc ::= '[' optInd [param (comma param)*] optPar ']'
 
 objectDef ::= 'object' [pragma] ['of' typeDesc] objectPart
 enumField ::= symbol ['=' expr]

doc/nimrodc.txt

@@ -118,17 +118,37 @@ The ``dynlib`` import mechanism supports a versioning scheme:
 
 .. code-block:: nimrod 
   proc Tcl_Eval(interp: pTcl_Interp, script: cstring): int {.cdecl, 
-    importc, dynlib: "libtcl(8.5|8.4|8.3).so.(1|0)".}
+    importc, dynlib: "libtcl(|8.5|8.4|8.3).so.(1|0)".}
 
 At runtime the dynamic library is searched for (in this order)::
   
+  libtcl.so.1  
+  libtcl.so.0
   libtcl8.5.so.1  
-  libtcl8.4.so.1
-  libtcl8.3.so.1
   libtcl8.5.so.0
+  libtcl8.4.so.1
   libtcl8.4.so.0
+  libtcl8.3.so.1
   libtcl8.3.so.0
 
+The ``dynlib`` pragma supports not only constant strings as argument but also
+string expressions in general:
+
+.. code-block:: nimrod
+  import os
+
+  proc getDllName: string = 
+    result = "mylib.dll"
+    if ExistsFile(result): return
+    result = "mylib2.dll"
+    if ExistsFile(result): return
+    quit("could not load dynamic library")
+  
+  proc myImport(s: cstring) {.cdecl, importc, dynlib: getDllName().}
+
+**Note**: Patterns like ``libtcl(|8.5|8.4).so`` are only supported in constant
+strings, because they are precompiled.
+
 
 NoDecl Pragma
 ~~~~~~~~~~~~~

rod/pbraces.nim

@@ -71,7 +71,7 @@ proc indexExprList(p: var TParser, first: PNode): PNode =
     if p.tok.tokType != tkComma: break 
     getTok(p)
     optInd(p, a)
-  optSad(p)
+  optPar(p)
   eat(p, tkBracketRi)
 
 proc exprColonEqExpr(p: var TParser, kind: TNodeKind, tok: TTokType): PNode = 
@@ -133,7 +133,7 @@ proc exprColonEqExprListAux(p: var TParser, elemKind: TNodeKind,
     if p.tok.tokType != tkComma: break 
     getTok(p)
     optInd(p, a)
-  optSad(p)
+  optPar(p)
   eat(p, endTok)
 
 proc exprColonEqExprList(p: var TParser, kind, elemKind: TNodeKind, 
@@ -147,12 +147,12 @@ proc parseCast(p: var TParser): PNode =
   eat(p, tkBracketLe)
   optInd(p, result)
   addSon(result, parseTypeDesc(p))
-  optSad(p)
+  optPar(p)
   eat(p, tkBracketRi)
   eat(p, tkParLe)
   optInd(p, result)
   addSon(result, parseExpr(p))
-  optSad(p)
+  optPar(p)
   eat(p, tkParRi)
 
 proc parseAddr(p: var TParser): PNode = 
@@ -161,7 +161,7 @@ proc parseAddr(p: var TParser): PNode =
   eat(p, tkParLe)
   optInd(p, result)
   addSon(result, parseExpr(p))
-  optSad(p)
+  optPar(p)
   eat(p, tkParRi)
 
 proc identOrLiteral(p: var TParser): PNode = 
@@ -343,7 +343,7 @@ proc parsePragma(p: var TParser): PNode =
     if p.tok.tokType == tkComma: 
       getTok(p)
       optInd(p, a)
-  optSad(p)
+  optPar(p)
   if (p.tok.tokType == tkCurlyDotRi) or (p.tok.tokType == tkCurlyRi): getTok(p)
   else: parMessage(p, errTokenExpected, ".}")
   
@@ -416,7 +416,7 @@ proc parseTuple(p: var TParser): PNode =
     if p.tok.tokType != tkComma: break 
     getTok(p)
     optInd(p, a)
-  optSad(p)
+  optPar(p)
   eat(p, tkBracketRi)
 
 proc parseParamList(p: var TParser): PNode = 
@@ -437,7 +437,7 @@ proc parseParamList(p: var TParser): PNode =
       if p.tok.tokType != tkComma: break 
       getTok(p)
       optInd(p, a)
-    optSad(p)
+    optPar(p)
     eat(p, tkParRi)
   if p.tok.tokType == tkColon: 
     getTok(p)
@@ -801,7 +801,7 @@ proc parseGenericParamList(p: var TParser): PNode =
     if p.tok.tokType != tkComma: break 
     getTok(p)
     optInd(p, a)
-  optSad(p)
+  optPar(p)
   eat(p, tkBracketRi)
 
 proc parseRoutine(p: var TParser, kind: TNodeKind): PNode = 
@@ -1061,7 +1061,7 @@ proc parseVarTuple(p: var TParser): PNode =
     getTok(p)
     optInd(p, a)
   addSon(result, nil)         # no type desc
-  optSad(p)
+  optPar(p)
   eat(p, tkParRi)
   eat(p, tkEquals)
   optInd(p, result)

rod/pnimsyn.nim

@@ -48,7 +48,7 @@ proc expectIdentOrOpr*(p: TParser)
 proc parLineInfo*(p: TParser): TLineInfo
 proc Eat*(p: var TParser, TokType: TTokType)
 proc skipInd*(p: var TParser)
-proc optSad*(p: var TParser)
+proc optPar*(p: var TParser)
 proc optInd*(p: var TParser, n: PNode)
 proc indAndComment*(p: var TParser, n: PNode)
 proc setBaseFlags*(n: PNode, base: TNumericalBase)
@@ -86,8 +86,8 @@ proc skipComment(p: var TParser, node: PNode) =
 proc skipInd(p: var TParser) = 
   if p.tok.tokType == tkInd: getTok(p)
   
-proc optSad(p: var TParser) = 
+proc optPar(p: var TParser) = 
-  if p.tok.tokType == tkSad: getTok(p)
+  if p.tok.tokType == tkSad or p.tok.tokType == tkInd: getTok(p)
   
 proc optInd(p: var TParser, n: PNode) = 
   skipComment(p, n)
@@ -166,9 +166,6 @@ proc isOperator(tok: PToken): bool =
   result = getPrecedence(tok) >= 0
 
 proc parseSymbol(p: var TParser): PNode = 
-  var 
-    s: string
-    id: PIdent
   case p.tok.tokType
   of tkSymbol: 
     result = newIdentNodeP(p.tok.ident, p)
@@ -178,7 +175,7 @@ proc parseSymbol(p: var TParser): PNode =
     getTok(p)
     case p.tok.tokType
     of tkBracketLe: 
-      s = "["
+      var s = "["
       getTok(p)
       if (p.tok.tokType == tkOpr) and (p.tok.ident.s == "$"): 
         s = s & "$.."
@@ -204,7 +201,7 @@ proc parseSymbol(p: var TParser): PNode =
       getTok(p)
       eat(p, tkParRi)
     of tokKeywordLow..tokKeywordHigh, tkSymbol, tkOpr: 
-      id = p.tok.ident
+      var id = p.tok.ident
       getTok(p)
       if p.tok.tokType == tkEquals: 
         addSon(result, newIdentNodeP(getIdent(id.s & '='), p))
@@ -283,24 +280,22 @@ proc indexExpr(p: var TParser): PNode =
     else: result = a
   
 proc indexExprList(p: var TParser, first: PNode): PNode = 
-  var a: PNode
   result = newNodeP(nkBracketExpr, p)
   addSon(result, first)
   getTok(p)
   optInd(p, result)
   while (p.tok.tokType != tkBracketRi) and (p.tok.tokType != tkEof) and
       (p.tok.tokType != tkSad): 
-    a = indexExpr(p)
+    var a = indexExpr(p)
     addSon(result, a)
     if p.tok.tokType != tkComma: break 
     getTok(p)
     optInd(p, a)
-  optSad(p)
+  optPar(p)
   eat(p, tkBracketRi)
 
 proc exprColonEqExpr(p: var TParser, kind: TNodeKind, tok: TTokType): PNode = 
-  var a: PNode
+  var a = parseExpr(p)
-  a = parseExpr(p)
   if p.tok.tokType == tok: 
     result = newNodeP(kind, p)
     getTok(p)                 #optInd(p, result);
@@ -311,11 +306,10 @@ proc exprColonEqExpr(p: var TParser, kind: TNodeKind, tok: TTokType): PNode =
   
 proc exprListAux(p: var TParser, elemKind: TNodeKind, endTok, sepTok: TTokType, 
                  result: PNode) = 
-  var a: PNode
   getTok(p)
   optInd(p, result)
   while (p.tok.tokType != endTok) and (p.tok.tokType != tkEof): 
-    a = exprColonEqExpr(p, elemKind, sepTok)
+    var a = exprColonEqExpr(p, elemKind, sepTok)
     addSon(result, a)
     if p.tok.tokType != tkComma: break 
     getTok(p)
@@ -323,22 +317,20 @@ proc exprListAux(p: var TParser, elemKind: TNodeKind, endTok, sepTok: TTokType,
   eat(p, endTok)
 
 proc qualifiedIdent(p: var TParser): PNode = 
-  var a: PNode
   result = parseSymbol(p)     #optInd(p, result);
   if p.tok.tokType == tkDot: 
     getTok(p)
     optInd(p, result)
-    a = result
+    var a = result
     result = newNodeI(nkDotExpr, a.info)
     addSon(result, a)
     addSon(result, parseSymbol(p))
 
 proc qualifiedIdentListAux(p: var TParser, endTok: TTokType, result: PNode) = 
-  var a: PNode
   getTok(p)
   optInd(p, result)
   while (p.tok.tokType != endTok) and (p.tok.tokType != tkEof): 
-    a = qualifiedIdent(p)
+    var a = qualifiedIdent(p)
     addSon(result, a)         #optInd(p, a);
     if p.tok.tokType != tkComma: break 
     getTok(p)
@@ -347,17 +339,17 @@ proc qualifiedIdentListAux(p: var TParser, endTok: TTokType, result: PNode) =
 
 proc exprColonEqExprListAux(p: var TParser, elemKind: TNodeKind, 
                             endTok, sepTok: TTokType, result: PNode) = 
-  var a: PNode
+  assert(endTok in {tkCurlyRi, tkCurlyDotRi, tkBracketRi, tkParRi})
   getTok(p)
   optInd(p, result)
   while (p.tok.tokType != endTok) and (p.tok.tokType != tkEof) and
-      (p.tok.tokType != tkSad): 
+      (p.tok.tokType != tkSad) and (p.tok.tokType != tkInd): 
-    a = exprColonEqExpr(p, elemKind, sepTok)
+    var a = exprColonEqExpr(p, elemKind, sepTok)
     addSon(result, a)
     if p.tok.tokType != tkComma: break 
     getTok(p)
     optInd(p, a)
-  optSad(p)
+  optPar(p)
   eat(p, endTok)
 
 proc exprColonEqExprList(p: var TParser, kind, elemKind: TNodeKind, 
@@ -371,12 +363,12 @@ proc parseCast(p: var TParser): PNode =
   eat(p, tkBracketLe)
   optInd(p, result)
   addSon(result, parseTypeDesc(p))
-  optSad(p)
+  optPar(p)
   eat(p, tkBracketRi)
   eat(p, tkParLe)
   optInd(p, result)
   addSon(result, parseExpr(p))
-  optSad(p)
+  optPar(p)
   eat(p, tkParRi)
 
 proc parseAddr(p: var TParser): PNode = 
@@ -385,7 +377,7 @@ proc parseAddr(p: var TParser): PNode =
   eat(p, tkParLe)
   optInd(p, result)
   addSon(result, parseExpr(p))
-  optSad(p)
+  optPar(p)
   eat(p, tkParRi)
 
 proc setBaseFlags(n: PNode, base: TNumericalBase) = 
@@ -577,7 +569,7 @@ proc parsePragma(p: var TParser): PNode =
     if p.tok.tokType == tkComma: 
       getTok(p)
       optInd(p, a)
-  optSad(p)
+  optPar(p)
   if (p.tok.tokType == tkCurlyDotRi) or (p.tok.tokType == tkCurlyRi): getTok(p)
   else: parMessage(p, errTokenExpected, ".}")
   
@@ -650,7 +642,7 @@ proc parseTuple(p: var TParser): PNode =
     if p.tok.tokType != tkComma: break 
     getTok(p)
     optInd(p, a)
-  optSad(p)
+  optPar(p)
   eat(p, tkBracketRi)
 
 proc parseParamList(p: var TParser): PNode = 
@@ -673,7 +665,7 @@ proc parseParamList(p: var TParser): PNode =
       if p.tok.tokType != tkComma: break 
       getTok(p)
       optInd(p, a)
-    optSad(p)
+    optPar(p)
     eat(p, tkParRi)
   if p.tok.tokType == tkColon: 
     getTok(p)
@@ -1035,7 +1027,7 @@ proc parseGenericParamList(p: var TParser): PNode =
     if p.tok.tokType != tkComma: break 
     getTok(p)
     optInd(p, a)
-  optSad(p)
+  optPar(p)
   eat(p, tkBracketRi)
 
 proc parseRoutine(p: var TParser, kind: TNodeKind): PNode = 
@@ -1283,7 +1275,7 @@ proc parseVarTuple(p: var TParser): PNode =
     getTok(p)
     optInd(p, a)
   addSon(result, nil)         # no type desc
-  optSad(p)
+  optPar(p)
   eat(p, tkParRi)
   eat(p, tkEquals)
   optInd(p, result)

tests/tdllvar.nim

@@ -0,0 +1,16 @@
+import os
+
+proc getDllName: string = 
+  result = "mylib.dll"
+  if ExistsFile(result): return
+  result = "mylib2.dll"
+  if ExistsFile(result): return
+  quit("could not load dynamic library")
+
+proc myImport(s: cstring) {.cdecl, importc, dynlib: getDllName().}
+proc myImport2(s: int) {.cdecl, importc, dynlib: getDllName().}
+
+myImport("test2")
+myImport2(12)
+
+

tests/tindent1.nim

@@ -0,0 +1,24 @@
+
+const romanNumbers1 =
+    [
+    ("M", 1000), ("D", 500), ("C", 100),
+    ("L", 50), ("X", 10), ("V", 5), ("I", 1) ]
+
+const romanNumbers2 =
+    [
+    ("M", 1000), ("D", 500), ("C", 100),
+    ("L", 50), ("X", 10), ("V", 5), ("I", 1)
+    ]
+
+const romanNumbers3 =
+  [
+    ("M", 1000), ("D", 500), ("C", 100),
+    ("L", 50), ("X", 10), ("V", 5), ("I", 1)
+  ]
+
+const romanNumbers4 = [
+    ("M", 1000), ("D", 500), ("C", 100),
+    ("L", 50), ("X", 10), ("V", 5), ("I", 1)
+    ]
+
+