1 //===- Arg.h - Parsed Argument Classes --------------------------*- C++ -*-===//
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 //===----------------------------------------------------------------------===//
11 /// Defines the llvm::Arg class for parsed arguments.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_OPTION_ARG_H
16 #define LLVM_OPTION_ARG_H
18 #include "llvm/ADT/SmallVector.h"
19 #include "llvm/ADT/StringRef.h"
20 #include "llvm/Option/Option.h"
31 /// A concrete instance of a particular driver option.
33 /// The Arg class encodes just enough information to be able to
34 /// derive the argument values efficiently.
37 /// The option this argument is an instance of.
40 /// The argument this argument was derived from (during tool chain
41 /// argument translation), if any.
44 /// How this instance of the option was spelled.
47 /// The index at which this argument appears in the containing
51 /// Was this argument used to effect compilation?
53 /// This is used for generating "argument unused" diagnostics.
54 mutable unsigned Claimed : 1;
56 /// Does this argument own its values?
57 mutable unsigned OwnsValues : 1;
59 /// The argument values, as C strings.
60 SmallVector<const char *, 2> Values;
63 Arg(const Option Opt, StringRef Spelling, unsigned Index,
64 const Arg *BaseArg = nullptr);
65 Arg(const Option Opt, StringRef Spelling, unsigned Index,
66 const char *Value0, const Arg *BaseArg = nullptr);
67 Arg(const Option Opt, StringRef Spelling, unsigned Index,
68 const char *Value0, const char *Value1, const Arg *BaseArg = nullptr);
69 Arg(const Arg &) = delete;
70 Arg &operator=(const Arg &) = delete;
73 const Option &getOption() const { return Opt; }
74 StringRef getSpelling() const { return Spelling; }
75 unsigned getIndex() const { return Index; }
77 /// Return the base argument which generated this arg.
79 /// This is either the argument itself or the argument it was
80 /// derived from during tool chain specific argument translation.
81 const Arg &getBaseArg() const {
82 return BaseArg ? *BaseArg : *this;
84 void setBaseArg(const Arg *BaseArg) { this->BaseArg = BaseArg; }
86 bool getOwnsValues() const { return OwnsValues; }
87 void setOwnsValues(bool Value) const { OwnsValues = Value; }
89 bool isClaimed() const { return getBaseArg().Claimed; }
91 /// Set the Arg claimed bit.
92 void claim() const { getBaseArg().Claimed = true; }
94 unsigned getNumValues() const { return Values.size(); }
96 const char *getValue(unsigned N = 0) const {
100 SmallVectorImpl<const char *> &getValues() { return Values; }
101 const SmallVectorImpl<const char *> &getValues() const { return Values; }
103 bool containsValue(StringRef Value) const {
104 for (unsigned i = 0, e = getNumValues(); i != e; ++i)
105 if (Values[i] == Value)
110 /// Append the argument onto the given array as strings.
111 void render(const ArgList &Args, ArgStringList &Output) const;
113 /// Append the argument, render as an input, onto the given
114 /// array as strings.
116 /// The distinction is that some options only render their values
117 /// when rendered as a input (e.g., Xlinker).
118 void renderAsInput(const ArgList &Args, ArgStringList &Output) const;
120 void print(raw_ostream &O) const;
123 /// Return a formatted version of the argument and
124 /// its values, for debugging and diagnostics.
125 std::string getAsString(const ArgList &Args) const;
128 } // end namespace opt
130 } // end namespace llvm
132 #endif // LLVM_OPTION_ARG_H