1 //===--- Option.cpp - Abstract Driver Options ---------------------------*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "clang/Driver/Option.h"
12 #include "clang/Driver/Arg.h"
13 #include "clang/Driver/ArgList.h"
14 #include "llvm/Support/raw_ostream.h"
17 using namespace clang::driver;
19 Option::Option(OptionClass _Kind, options::ID _ID, const char *_Name,
20 const OptionGroup *_Group, const Option *_Alias)
21 : Kind(_Kind), ID(_ID), Name(_Name), Group(_Group), Alias(_Alias),
22 Unsupported(false), LinkerInput(false), NoOptAsInput(false),
23 ForceSeparateRender(false), ForceJoinedRender(false),
24 DriverOption(false), NoArgumentUnused(false)
27 // Multi-level aliases are not supported, and alias options cannot
28 // have groups. This just simplifies option tracking, it is not an
29 // inherent limitation.
30 assert((!Alias || (!Alias->Alias && !Group)) &&
31 "Multi-level aliases and aliases with groups are unsupported.");
37 void Option::dump() const {
41 assert(0 && "Invalid kind");
42 #define P(N) case N: llvm::errs() << #N; break
51 P(JoinedOrSeparateClass);
52 P(JoinedAndSeparateClass);
56 llvm::errs() << " Name:\"" << Name << '"';
59 llvm::errs() << " Group:";
64 llvm::errs() << " Alias:";
68 if (const MultiArgOption *MOA = dyn_cast<MultiArgOption>(this))
69 llvm::errs() << " NumArgs:" << MOA->getNumArgs();
71 llvm::errs() << ">\n";
74 bool Option::matches(const Option *Opt) const {
75 // Aliases are never considered in matching.
77 return matches(Opt->getAlias());
79 return Alias->matches(Opt);
85 return Group->matches(Opt);
89 bool Option::matches(options::ID Id) const {
90 // FIXME: Decide what to do here; we should either pull out the
91 // handling of alias on the option for Id from the other matches, or
92 // find some other solution (which hopefully doesn't require using
95 return Alias->matches(Id);
101 return Group->matches(Id);
105 OptionGroup::OptionGroup(options::ID ID, const char *Name,
106 const OptionGroup *Group)
107 : Option(Option::GroupClass, ID, Name, Group, 0) {
110 Arg *OptionGroup::accept(const InputArgList &Args, unsigned &Index) const {
111 assert(0 && "accept() should never be called on an OptionGroup");
115 InputOption::InputOption()
116 : Option(Option::InputClass, options::OPT_INPUT, "<input>", 0, 0) {
119 Arg *InputOption::accept(const InputArgList &Args, unsigned &Index) const {
120 assert(0 && "accept() should never be called on an InputOption");
124 UnknownOption::UnknownOption()
125 : Option(Option::UnknownClass, options::OPT_UNKNOWN, "<unknown>", 0, 0) {
128 Arg *UnknownOption::accept(const InputArgList &Args, unsigned &Index) const {
129 assert(0 && "accept() should never be called on an UnknownOption");
133 FlagOption::FlagOption(options::ID ID, const char *Name,
134 const OptionGroup *Group, const Option *Alias)
135 : Option(Option::FlagClass, ID, Name, Group, Alias) {
138 Arg *FlagOption::accept(const InputArgList &Args, unsigned &Index) const {
139 // Matches iff this is an exact match.
140 // FIXME: Avoid strlen.
141 if (strlen(getName()) != strlen(Args.getArgString(Index)))
144 return new FlagArg(this, Index++);
147 JoinedOption::JoinedOption(options::ID ID, const char *Name,
148 const OptionGroup *Group, const Option *Alias)
149 : Option(Option::JoinedClass, ID, Name, Group, Alias) {
152 Arg *JoinedOption::accept(const InputArgList &Args, unsigned &Index) const {
154 return new JoinedArg(this, Index++);
157 CommaJoinedOption::CommaJoinedOption(options::ID ID, const char *Name,
158 const OptionGroup *Group,
160 : Option(Option::CommaJoinedClass, ID, Name, Group, Alias) {
163 Arg *CommaJoinedOption::accept(const InputArgList &Args,
164 unsigned &Index) const {
165 // Always matches. We count the commas now so we can answer
166 // getNumValues easily.
168 // Get the suffix string.
169 // FIXME: Avoid strlen, and move to helper method?
170 const char *Suffix = Args.getArgString(Index) + strlen(getName());
171 return new CommaJoinedArg(this, Index++, Suffix);
174 SeparateOption::SeparateOption(options::ID ID, const char *Name,
175 const OptionGroup *Group, const Option *Alias)
176 : Option(Option::SeparateClass, ID, Name, Group, Alias) {
179 Arg *SeparateOption::accept(const InputArgList &Args, unsigned &Index) const {
180 // Matches iff this is an exact match.
181 // FIXME: Avoid strlen.
182 if (strlen(getName()) != strlen(Args.getArgString(Index)))
186 if (Index > Args.getNumInputArgStrings())
189 return new SeparateArg(this, Index - 2, 1);
192 MultiArgOption::MultiArgOption(options::ID ID, const char *Name,
193 const OptionGroup *Group, const Option *Alias,
195 : Option(Option::MultiArgClass, ID, Name, Group, Alias), NumArgs(_NumArgs) {
196 assert(NumArgs > 1 && "Invalid MultiArgOption!");
199 Arg *MultiArgOption::accept(const InputArgList &Args, unsigned &Index) const {
200 // Matches iff this is an exact match.
201 // FIXME: Avoid strlen.
202 if (strlen(getName()) != strlen(Args.getArgString(Index)))
205 Index += 1 + NumArgs;
206 if (Index > Args.getNumInputArgStrings())
209 return new SeparateArg(this, Index - 1 - NumArgs, NumArgs);
212 JoinedOrSeparateOption::JoinedOrSeparateOption(options::ID ID, const char *Name,
213 const OptionGroup *Group,
215 : Option(Option::JoinedOrSeparateClass, ID, Name, Group, Alias) {
218 Arg *JoinedOrSeparateOption::accept(const InputArgList &Args,
219 unsigned &Index) const {
220 // If this is not an exact match, it is a joined arg.
221 // FIXME: Avoid strlen.
222 if (strlen(getName()) != strlen(Args.getArgString(Index)))
223 return new JoinedArg(this, Index++);
225 // Otherwise it must be separate.
227 if (Index > Args.getNumInputArgStrings())
230 return new SeparateArg(this, Index - 2, 1);
233 JoinedAndSeparateOption::JoinedAndSeparateOption(options::ID ID,
235 const OptionGroup *Group,
237 : Option(Option::JoinedAndSeparateClass, ID, Name, Group, Alias) {
240 Arg *JoinedAndSeparateOption::accept(const InputArgList &Args,
241 unsigned &Index) const {
245 if (Index > Args.getNumInputArgStrings())
248 return new JoinedAndSeparateArg(this, Index - 2);