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first step to get rid of nil in the AST

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This commit is contained in:
Araq 2011-02-09 00:26:41 +01:00
commit 27dc54cbda
17 changed files with 505 additions and 436 deletions
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7
rod/syntaxes.nim
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@ -1,7 +1,7 @@
#
#
# The Nimrod Compiler
# (c) Copyright 2010 Andreas Rumpf
# (c) Copyright 2011 Andreas Rumpf
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
@ -59,6 +59,7 @@ proc parseAll(p: var TParsers): PNode =
result = pbraces.parseAll(p.parser)
of skinEndX:
InternalError("parser to implement")
result = ast.emptyNode
# skinEndX: result := pendx.parseAll(p.parser);
proc parseTopLevelStmt(p: var TParsers): PNode =
@ -69,6 +70,7 @@ proc parseTopLevelStmt(p: var TParsers): PNode =
result = pbraces.parseTopLevelStmt(p.parser)
of skinEndX:
InternalError("parser to implement")
result = ast.emptyNode
#skinEndX: result := pendx.parseTopLevelStmt(p.parser);
proc UTF8_BOM(s: string): int =
@ -84,6 +86,7 @@ proc containsShebang(s: string, i: int): bool =
result = s[j] == '/'
proc parsePipe(filename: string, inputStream: PLLStream): PNode =
result = ast.emptyNode
var s = LLStreamOpen(filename, fmRead)
if s != nil:
var line = LLStreamReadLine(s)
@ -143,7 +146,7 @@ proc applyFilter(p: var TParsers, n: PNode, filename: string,
proc evalPipe(p: var TParsers, n: PNode, filename: string,
start: PLLStream): PLLStream =
result = start
if n == nil: return
if n.kind == nkEmpty: return
if (n.kind == nkInfix) and (n.sons[0].kind == nkIdent) and
IdentEq(n.sons[0].ident, "|"):
for i in countup(1, 2):