| //===-- FileCheckImpl.h - Private FileCheck Interface ------------*- C++ -*-==// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the private interfaces of FileCheck. Its purpose is to |
| // allow unit testing of FileCheck and to separate the interface from the |
| // implementation. It is only meant to be used by FileCheck. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_FILECHECK_FILECHECKIMPL_H |
| #define LLVM_LIB_FILECHECK_FILECHECKIMPL_H |
| |
| #include "llvm/ADT/Optional.h" |
| #include "llvm/ADT/StringMap.h" |
| #include "llvm/ADT/StringRef.h" |
| #include "llvm/FileCheck/FileCheck.h" |
| #include "llvm/Support/Error.h" |
| #include "llvm/Support/SourceMgr.h" |
| #include <map> |
| #include <string> |
| #include <vector> |
| |
| namespace llvm { |
| |
| //===----------------------------------------------------------------------===// |
| // Numeric substitution handling code. |
| //===----------------------------------------------------------------------===// |
| |
| class ExpressionValue; |
| |
| /// Type representing the format an expression value should be textualized into |
| /// for matching. Used to represent both explicit format specifiers as well as |
| /// implicit format from using numeric variables. |
| struct ExpressionFormat { |
| enum class Kind { |
| /// Denote absence of format. Used for implicit format of literals and |
| /// empty expressions. |
| NoFormat, |
| /// Value is an unsigned integer and should be printed as a decimal number. |
| Unsigned, |
| /// Value is a signed integer and should be printed as a decimal number. |
| Signed, |
| /// Value should be printed as an uppercase hex number. |
| HexUpper, |
| /// Value should be printed as a lowercase hex number. |
| HexLower |
| }; |
| |
| private: |
| Kind Value; |
| unsigned Precision = 0; |
| /// printf-like "alternate form" selected. |
| bool AlternateForm = false; |
| |
| public: |
| /// Evaluates a format to true if it can be used in a match. |
| explicit operator bool() const { return Value != Kind::NoFormat; } |
| |
| /// Define format equality: formats are equal if neither is NoFormat and |
| /// their kinds and precision are the same. |
| bool operator==(const ExpressionFormat &Other) const { |
| return Value != Kind::NoFormat && Value == Other.Value && |
| Precision == Other.Precision && AlternateForm == Other.AlternateForm; |
| } |
| |
| bool operator!=(const ExpressionFormat &Other) const { |
| return !(*this == Other); |
| } |
| |
| bool operator==(Kind OtherValue) const { return Value == OtherValue; } |
| |
| bool operator!=(Kind OtherValue) const { return !(*this == OtherValue); } |
| |
| /// \returns the format specifier corresponding to this format as a string. |
| StringRef toString() const; |
| |
| ExpressionFormat() : Value(Kind::NoFormat){}; |
| explicit ExpressionFormat(Kind Value) : Value(Value), Precision(0){}; |
| explicit ExpressionFormat(Kind Value, unsigned Precision) |
| : Value(Value), Precision(Precision){}; |
| explicit ExpressionFormat(Kind Value, unsigned Precision, bool AlternateForm) |
| : Value(Value), Precision(Precision), AlternateForm(AlternateForm){}; |
| |
| /// \returns a wildcard regular expression string that matches any value in |
| /// the format represented by this instance and no other value, or an error |
| /// if the format is NoFormat. |
| Expected<std::string> getWildcardRegex() const; |
| |
| /// \returns the string representation of \p Value in the format represented |
| /// by this instance, or an error if conversion to this format failed or the |
| /// format is NoFormat. |
| Expected<std::string> getMatchingString(ExpressionValue Value) const; |
| |
| /// \returns the value corresponding to string representation \p StrVal |
| /// according to the matching format represented by this instance or an error |
| /// with diagnostic against \p SM if \p StrVal does not correspond to a valid |
| /// and representable value. |
| Expected<ExpressionValue> valueFromStringRepr(StringRef StrVal, |
| const SourceMgr &SM) const; |
| }; |
| |
| /// Class to represent an overflow error that might result when manipulating a |
| /// value. |
| class OverflowError : public ErrorInfo<OverflowError> { |
| public: |
| static char ID; |
| |
| std::error_code convertToErrorCode() const override { |
| return std::make_error_code(std::errc::value_too_large); |
| } |
| |
| void log(raw_ostream &OS) const override { OS << "overflow error"; } |
| }; |
| |
| /// Class representing a numeric value. |
| class ExpressionValue { |
| private: |
| uint64_t Value; |
| bool Negative; |
| |
| public: |
| template <class T> |
| explicit ExpressionValue(T Val) : Value(Val), Negative(Val < 0) {} |
| |
| bool operator==(const ExpressionValue &Other) const { |
| return Value == Other.Value && isNegative() == Other.isNegative(); |
| } |
| |
| bool operator!=(const ExpressionValue &Other) const { |
| return !(*this == Other); |
| } |
| |
| /// Returns true if value is signed and negative, false otherwise. |
| bool isNegative() const { |
| assert((Value != 0 || !Negative) && "Unexpected negative zero!"); |
| return Negative; |
| } |
| |
| /// \returns the value as a signed integer or an error if the value is out of |
| /// range. |
| Expected<int64_t> getSignedValue() const; |
| |
| /// \returns the value as an unsigned integer or an error if the value is out |
| /// of range. |
| Expected<uint64_t> getUnsignedValue() const; |
| |
| /// \returns an unsigned ExpressionValue instance whose value is the absolute |
| /// value to this object's value. |
| ExpressionValue getAbsolute() const; |
| }; |
| |
| /// Performs operation and \returns its result or an error in case of failure, |
| /// such as if an overflow occurs. |
| Expected<ExpressionValue> operator+(const ExpressionValue &Lhs, |
| const ExpressionValue &Rhs); |
| Expected<ExpressionValue> operator-(const ExpressionValue &Lhs, |
| const ExpressionValue &Rhs); |
| Expected<ExpressionValue> operator*(const ExpressionValue &Lhs, |
| const ExpressionValue &Rhs); |
| Expected<ExpressionValue> operator/(const ExpressionValue &Lhs, |
| const ExpressionValue &Rhs); |
| Expected<ExpressionValue> max(const ExpressionValue &Lhs, |
| const ExpressionValue &Rhs); |
| Expected<ExpressionValue> min(const ExpressionValue &Lhs, |
| const ExpressionValue &Rhs); |
| |
| /// Base class representing the AST of a given expression. |
| class ExpressionAST { |
| private: |
| StringRef ExpressionStr; |
| |
| public: |
| ExpressionAST(StringRef ExpressionStr) : ExpressionStr(ExpressionStr) {} |
| |
| virtual ~ExpressionAST() = default; |
| |
| StringRef getExpressionStr() const { return ExpressionStr; } |
| |
| /// Evaluates and \returns the value of the expression represented by this |
| /// AST or an error if evaluation fails. |
| virtual Expected<ExpressionValue> eval() const = 0; |
| |
| /// \returns either the implicit format of this AST, a diagnostic against |
| /// \p SM if implicit formats of the AST's components conflict, or NoFormat |
| /// if the AST has no implicit format (e.g. AST is made up of a single |
| /// literal). |
| virtual Expected<ExpressionFormat> |
| getImplicitFormat(const SourceMgr &SM) const { |
| return ExpressionFormat(); |
| } |
| }; |
| |
| /// Class representing an unsigned literal in the AST of an expression. |
| class ExpressionLiteral : public ExpressionAST { |
| private: |
| /// Actual value of the literal. |
| ExpressionValue Value; |
| |
| public: |
| template <class T> |
| explicit ExpressionLiteral(StringRef ExpressionStr, T Val) |
| : ExpressionAST(ExpressionStr), Value(Val) {} |
| |
| /// \returns the literal's value. |
| Expected<ExpressionValue> eval() const override { return Value; } |
| }; |
| |
| /// Class to represent an undefined variable error, which quotes that |
| /// variable's name when printed. |
| class UndefVarError : public ErrorInfo<UndefVarError> { |
| private: |
| StringRef VarName; |
| |
| public: |
| static char ID; |
| |
| UndefVarError(StringRef VarName) : VarName(VarName) {} |
| |
| StringRef getVarName() const { return VarName; } |
| |
| std::error_code convertToErrorCode() const override { |
| return inconvertibleErrorCode(); |
| } |
| |
| /// Print name of variable associated with this error. |
| void log(raw_ostream &OS) const override { |
| OS << "undefined variable: " << VarName; |
| } |
| }; |
| |
| /// Class representing an expression and its matching format. |
| class Expression { |
| private: |
| /// Pointer to AST of the expression. |
| std::unique_ptr<ExpressionAST> AST; |
| |
| /// Format to use (e.g. hex upper case letters) when matching the value. |
| ExpressionFormat Format; |
| |
| public: |
| /// Generic constructor for an expression represented by the given \p AST and |
| /// whose matching format is \p Format. |
| Expression(std::unique_ptr<ExpressionAST> AST, ExpressionFormat Format) |
| : AST(std::move(AST)), Format(Format) {} |
| |
| /// \returns pointer to AST of the expression. Pointer is guaranteed to be |
| /// valid as long as this object is. |
| ExpressionAST *getAST() const { return AST.get(); } |
| |
| ExpressionFormat getFormat() const { return Format; } |
| }; |
| |
| /// Class representing a numeric variable and its associated current value. |
| class NumericVariable { |
| private: |
| /// Name of the numeric variable. |
| StringRef Name; |
| |
| /// Format to use for expressions using this variable without an explicit |
| /// format. |
| ExpressionFormat ImplicitFormat; |
| |
| /// Value of numeric variable, if defined, or None otherwise. |
| Optional<ExpressionValue> Value; |
| |
| /// The input buffer's string from which Value was parsed, or None. See |
| /// comments on getStringValue for a discussion of the None case. |
| Optional<StringRef> StrValue; |
| |
| /// Line number where this variable is defined, or None if defined before |
| /// input is parsed. Used to determine whether a variable is defined on the |
| /// same line as a given use. |
| Optional<size_t> DefLineNumber; |
| |
| public: |
| /// Constructor for a variable \p Name with implicit format \p ImplicitFormat |
| /// defined at line \p DefLineNumber or defined before input is parsed if |
| /// \p DefLineNumber is None. |
| explicit NumericVariable(StringRef Name, ExpressionFormat ImplicitFormat, |
| Optional<size_t> DefLineNumber = None) |
| : Name(Name), ImplicitFormat(ImplicitFormat), |
| DefLineNumber(DefLineNumber) {} |
| |
| /// \returns name of this numeric variable. |
| StringRef getName() const { return Name; } |
| |
| /// \returns implicit format of this numeric variable. |
| ExpressionFormat getImplicitFormat() const { return ImplicitFormat; } |
| |
| /// \returns this variable's value. |
| Optional<ExpressionValue> getValue() const { return Value; } |
| |
| /// \returns the input buffer's string from which this variable's value was |
| /// parsed, or None if the value is not yet defined or was not parsed from the |
| /// input buffer. For example, the value of @LINE is not parsed from the |
| /// input buffer, and some numeric variables are parsed from the command |
| /// line instead. |
| Optional<StringRef> getStringValue() const { return StrValue; } |
| |
| /// Sets value of this numeric variable to \p NewValue, and sets the input |
| /// buffer string from which it was parsed to \p NewStrValue. See comments on |
| /// getStringValue for a discussion of when the latter can be None. |
| void setValue(ExpressionValue NewValue, |
| Optional<StringRef> NewStrValue = None) { |
| Value = NewValue; |
| StrValue = NewStrValue; |
| } |
| |
| /// Clears value of this numeric variable, regardless of whether it is |
| /// currently defined or not. |
| void clearValue() { |
| Value = None; |
| StrValue = None; |
| } |
| |
| /// \returns the line number where this variable is defined, if any, or None |
| /// if defined before input is parsed. |
| Optional<size_t> getDefLineNumber() const { return DefLineNumber; } |
| }; |
| |
| /// Class representing the use of a numeric variable in the AST of an |
| /// expression. |
| class NumericVariableUse : public ExpressionAST { |
| private: |
| /// Pointer to the class instance for the variable this use is about. |
| NumericVariable *Variable; |
| |
| public: |
| NumericVariableUse(StringRef Name, NumericVariable *Variable) |
| : ExpressionAST(Name), Variable(Variable) {} |
| /// \returns the value of the variable referenced by this instance. |
| Expected<ExpressionValue> eval() const override; |
| |
| /// \returns implicit format of this numeric variable. |
| Expected<ExpressionFormat> |
| getImplicitFormat(const SourceMgr &SM) const override { |
| return Variable->getImplicitFormat(); |
| } |
| }; |
| |
| /// Type of functions evaluating a given binary operation. |
| using binop_eval_t = Expected<ExpressionValue> (*)(const ExpressionValue &, |
| const ExpressionValue &); |
| |
| /// Class representing a single binary operation in the AST of an expression. |
| class BinaryOperation : public ExpressionAST { |
| private: |
| /// Left operand. |
| std::unique_ptr<ExpressionAST> LeftOperand; |
| |
| /// Right operand. |
| std::unique_ptr<ExpressionAST> RightOperand; |
| |
| /// Pointer to function that can evaluate this binary operation. |
| binop_eval_t EvalBinop; |
| |
| public: |
| BinaryOperation(StringRef ExpressionStr, binop_eval_t EvalBinop, |
| std::unique_ptr<ExpressionAST> LeftOp, |
| std::unique_ptr<ExpressionAST> RightOp) |
| : ExpressionAST(ExpressionStr), EvalBinop(EvalBinop) { |
| LeftOperand = std::move(LeftOp); |
| RightOperand = std::move(RightOp); |
| } |
| |
| /// Evaluates the value of the binary operation represented by this AST, |
| /// using EvalBinop on the result of recursively evaluating the operands. |
| /// \returns the expression value or an error if an undefined numeric |
| /// variable is used in one of the operands. |
| Expected<ExpressionValue> eval() const override; |
| |
| /// \returns the implicit format of this AST, if any, a diagnostic against |
| /// \p SM if the implicit formats of the AST's components conflict, or no |
| /// format if the AST has no implicit format (e.g. AST is made of a single |
| /// literal). |
| Expected<ExpressionFormat> |
| getImplicitFormat(const SourceMgr &SM) const override; |
| }; |
| |
| class FileCheckPatternContext; |
| |
| /// Class representing a substitution to perform in the RegExStr string. |
| class Substitution { |
| protected: |
| /// Pointer to a class instance holding, among other things, the table with |
| /// the values of live string variables at the start of any given CHECK line. |
| /// Used for substituting string variables with the text they were defined |
| /// as. Expressions are linked to the numeric variables they use at |
| /// parse time and directly access the value of the numeric variable to |
| /// evaluate their value. |
| FileCheckPatternContext *Context; |
| |
| /// The string that needs to be substituted for something else. For a |
| /// string variable this is its name, otherwise this is the whole expression. |
| StringRef FromStr; |
| |
| // Index in RegExStr of where to do the substitution. |
| size_t InsertIdx; |
| |
| public: |
| Substitution(FileCheckPatternContext *Context, StringRef VarName, |
| size_t InsertIdx) |
| : Context(Context), FromStr(VarName), InsertIdx(InsertIdx) {} |
| |
| virtual ~Substitution() = default; |
| |
| /// \returns the string to be substituted for something else. |
| StringRef getFromString() const { return FromStr; } |
| |
| /// \returns the index where the substitution is to be performed in RegExStr. |
| size_t getIndex() const { return InsertIdx; } |
| |
| /// \returns a string containing the result of the substitution represented |
| /// by this class instance or an error if substitution failed. |
| virtual Expected<std::string> getResult() const = 0; |
| }; |
| |
| class StringSubstitution : public Substitution { |
| public: |
| StringSubstitution(FileCheckPatternContext *Context, StringRef VarName, |
| size_t InsertIdx) |
| : Substitution(Context, VarName, InsertIdx) {} |
| |
| /// \returns the text that the string variable in this substitution matched |
| /// when defined, or an error if the variable is undefined. |
| Expected<std::string> getResult() const override; |
| }; |
| |
| class NumericSubstitution : public Substitution { |
| private: |
| /// Pointer to the class representing the expression whose value is to be |
| /// substituted. |
| std::unique_ptr<Expression> ExpressionPointer; |
| |
| public: |
| NumericSubstitution(FileCheckPatternContext *Context, StringRef ExpressionStr, |
| std::unique_ptr<Expression> ExpressionPointer, |
| size_t InsertIdx) |
| : Substitution(Context, ExpressionStr, InsertIdx), |
| ExpressionPointer(std::move(ExpressionPointer)) {} |
| |
| /// \returns a string containing the result of evaluating the expression in |
| /// this substitution, or an error if evaluation failed. |
| Expected<std::string> getResult() const override; |
| }; |
| |
| //===----------------------------------------------------------------------===// |
| // Pattern handling code. |
| //===----------------------------------------------------------------------===// |
| |
| /// Class holding the Pattern global state, shared by all patterns: tables |
| /// holding values of variables and whether they are defined or not at any |
| /// given time in the matching process. |
| class FileCheckPatternContext { |
| friend class Pattern; |
| |
| private: |
| /// When matching a given pattern, this holds the value of all the string |
| /// variables defined in previous patterns. In a pattern, only the last |
| /// definition for a given variable is recorded in this table. |
| /// Back-references are used for uses after any the other definition. |
| StringMap<StringRef> GlobalVariableTable; |
| |
| /// Map of all string variables defined so far. Used at parse time to detect |
| /// a name conflict between a numeric variable and a string variable when |
| /// the former is defined on a later line than the latter. |
| StringMap<bool> DefinedVariableTable; |
| |
| /// When matching a given pattern, this holds the pointers to the classes |
| /// representing the numeric variables defined in previous patterns. When |
| /// matching a pattern all definitions for that pattern are recorded in the |
| /// NumericVariableDefs table in the Pattern instance of that pattern. |
| StringMap<NumericVariable *> GlobalNumericVariableTable; |
| |
| /// Pointer to the class instance representing the @LINE pseudo variable for |
| /// easily updating its value. |
| NumericVariable *LineVariable = nullptr; |
| |
| /// Vector holding pointers to all parsed numeric variables. Used to |
| /// automatically free them once they are guaranteed to no longer be used. |
| std::vector<std::unique_ptr<NumericVariable>> NumericVariables; |
| |
| /// Vector holding pointers to all parsed expressions. Used to automatically |
| /// free the expressions once they are guaranteed to no longer be used. |
| std::vector<std::unique_ptr<Expression>> Expressions; |
| |
| /// Vector holding pointers to all substitutions. Used to automatically free |
| /// them once they are guaranteed to no longer be used. |
| std::vector<std::unique_ptr<Substitution>> Substitutions; |
| |
| public: |
| /// \returns the value of string variable \p VarName or an error if no such |
| /// variable has been defined. |
| Expected<StringRef> getPatternVarValue(StringRef VarName); |
| |
| /// Defines string and numeric variables from definitions given on the |
| /// command line, passed as a vector of [#]VAR=VAL strings in |
| /// \p CmdlineDefines. \returns an error list containing diagnostics against |
| /// \p SM for all definition parsing failures, if any, or Success otherwise. |
| Error defineCmdlineVariables(ArrayRef<StringRef> CmdlineDefines, |
| SourceMgr &SM); |
| |
| /// Create @LINE pseudo variable. Value is set when pattern are being |
| /// matched. |
| void createLineVariable(); |
| |
| /// Undefines local variables (variables whose name does not start with a '$' |
| /// sign), i.e. removes them from GlobalVariableTable and from |
| /// GlobalNumericVariableTable and also clears the value of numeric |
| /// variables. |
| void clearLocalVars(); |
| |
| private: |
| /// Makes a new numeric variable and registers it for destruction when the |
| /// context is destroyed. |
| template <class... Types> NumericVariable *makeNumericVariable(Types... args); |
| |
| /// Makes a new string substitution and registers it for destruction when the |
| /// context is destroyed. |
| Substitution *makeStringSubstitution(StringRef VarName, size_t InsertIdx); |
| |
| /// Makes a new numeric substitution and registers it for destruction when |
| /// the context is destroyed. |
| Substitution *makeNumericSubstitution(StringRef ExpressionStr, |
| std::unique_ptr<Expression> Expression, |
| size_t InsertIdx); |
| }; |
| |
| /// Class to represent an error holding a diagnostic with location information |
| /// used when printing it. |
| class ErrorDiagnostic : public ErrorInfo<ErrorDiagnostic> { |
| private: |
| SMDiagnostic Diagnostic; |
| SMRange Range; |
| |
| public: |
| static char ID; |
| |
| ErrorDiagnostic(SMDiagnostic &&Diag, SMRange Range) |
| : Diagnostic(Diag), Range(Range) {} |
| |
| std::error_code convertToErrorCode() const override { |
| return inconvertibleErrorCode(); |
| } |
| |
| /// Print diagnostic associated with this error when printing the error. |
| void log(raw_ostream &OS) const override { Diagnostic.print(nullptr, OS); } |
| |
| StringRef getMessage() const { return Diagnostic.getMessage(); } |
| SMRange getRange() const { return Range; } |
| |
| static Error get(const SourceMgr &SM, SMLoc Loc, const Twine &ErrMsg, |
| SMRange Range = None) { |
| return make_error<ErrorDiagnostic>( |
| SM.GetMessage(Loc, SourceMgr::DK_Error, ErrMsg), Range); |
| } |
| |
| static Error get(const SourceMgr &SM, StringRef Buffer, const Twine &ErrMsg) { |
| SMLoc Start = SMLoc::getFromPointer(Buffer.data()); |
| SMLoc End = SMLoc::getFromPointer(Buffer.data() + Buffer.size()); |
| return get(SM, Start, ErrMsg, SMRange(Start, End)); |
| } |
| }; |
| |
| class NotFoundError : public ErrorInfo<NotFoundError> { |
| public: |
| static char ID; |
| |
| std::error_code convertToErrorCode() const override { |
| return inconvertibleErrorCode(); |
| } |
| |
| /// Print diagnostic associated with this error when printing the error. |
| void log(raw_ostream &OS) const override { |
| OS << "String not found in input"; |
| } |
| }; |
| |
| /// An error that has already been reported. |
| /// |
| /// This class is designed to support a function whose callers may need to know |
| /// whether the function encountered and reported an error but never need to |
| /// know the nature of that error. For example, the function has a return type |
| /// of \c Error and always returns either \c ErrorReported or \c ErrorSuccess. |
| /// That interface is similar to that of a function returning bool to indicate |
| /// an error except, in the former case, (1) there is no confusion over polarity |
| /// and (2) the caller must either check the result or explicitly ignore it with |
| /// a call like \c consumeError. |
| class ErrorReported final : public ErrorInfo<ErrorReported> { |
| public: |
| static char ID; |
| |
| std::error_code convertToErrorCode() const override { |
| return inconvertibleErrorCode(); |
| } |
| |
| /// Print diagnostic associated with this error when printing the error. |
| void log(raw_ostream &OS) const override { |
| OS << "error previously reported"; |
| } |
| |
| static inline Error reportedOrSuccess(bool HasErrorReported) { |
| if (HasErrorReported) |
| return make_error<ErrorReported>(); |
| return Error::success(); |
| } |
| }; |
| |
| class Pattern { |
| SMLoc PatternLoc; |
| |
| /// A fixed string to match as the pattern or empty if this pattern requires |
| /// a regex match. |
| StringRef FixedStr; |
| |
| /// A regex string to match as the pattern or empty if this pattern requires |
| /// a fixed string to match. |
| std::string RegExStr; |
| |
| /// Entries in this vector represent a substitution of a string variable or |
| /// an expression in the RegExStr regex at match time. For example, in the |
| /// case of a CHECK directive with the pattern "foo[[bar]]baz[[#N+1]]", |
| /// RegExStr will contain "foobaz" and we'll get two entries in this vector |
| /// that tells us to insert the value of string variable "bar" at offset 3 |
| /// and the value of expression "N+1" at offset 6. |
| std::vector<Substitution *> Substitutions; |
| |
| /// Maps names of string variables defined in a pattern to the number of |
| /// their parenthesis group in RegExStr capturing their last definition. |
| /// |
| /// E.g. for the pattern "foo[[bar:.*]]baz([[bar]][[QUUX]][[bar:.*]])", |
| /// RegExStr will be "foo(.*)baz(\1<quux value>(.*))" where <quux value> is |
| /// the value captured for QUUX on the earlier line where it was defined, and |
| /// VariableDefs will map "bar" to the third parenthesis group which captures |
| /// the second definition of "bar". |
| /// |
| /// Note: uses std::map rather than StringMap to be able to get the key when |
| /// iterating over values. |
| std::map<StringRef, unsigned> VariableDefs; |
| |
| /// Structure representing the definition of a numeric variable in a pattern. |
| /// It holds the pointer to the class instance holding the value and matching |
| /// format of the numeric variable whose value is being defined and the |
| /// number of the parenthesis group in RegExStr to capture that value. |
| struct NumericVariableMatch { |
| /// Pointer to class instance holding the value and matching format of the |
| /// numeric variable being defined. |
| NumericVariable *DefinedNumericVariable; |
| |
| /// Number of the parenthesis group in RegExStr that captures the value of |
| /// this numeric variable definition. |
| unsigned CaptureParenGroup; |
| }; |
| |
| /// Holds the number of the parenthesis group in RegExStr and pointer to the |
| /// corresponding NumericVariable class instance of all numeric variable |
| /// definitions. Used to set the matched value of all those variables. |
| StringMap<NumericVariableMatch> NumericVariableDefs; |
| |
| /// Pointer to a class instance holding the global state shared by all |
| /// patterns: |
| /// - separate tables with the values of live string and numeric variables |
| /// respectively at the start of any given CHECK line; |
| /// - table holding whether a string variable has been defined at any given |
| /// point during the parsing phase. |
| FileCheckPatternContext *Context; |
| |
| Check::FileCheckType CheckTy; |
| |
| /// Line number for this CHECK pattern or None if it is an implicit pattern. |
| /// Used to determine whether a variable definition is made on an earlier |
| /// line to the one with this CHECK. |
| Optional<size_t> LineNumber; |
| |
| /// Ignore case while matching if set to true. |
| bool IgnoreCase = false; |
| |
| public: |
| Pattern(Check::FileCheckType Ty, FileCheckPatternContext *Context, |
| Optional<size_t> Line = None) |
| : Context(Context), CheckTy(Ty), LineNumber(Line) {} |
| |
| /// \returns the location in source code. |
| SMLoc getLoc() const { return PatternLoc; } |
| |
| /// \returns the pointer to the global state for all patterns in this |
| /// FileCheck instance. |
| FileCheckPatternContext *getContext() const { return Context; } |
| |
| /// \returns whether \p C is a valid first character for a variable name. |
| static bool isValidVarNameStart(char C); |
| |
| /// Parsing information about a variable. |
| struct VariableProperties { |
| StringRef Name; |
| bool IsPseudo; |
| }; |
| |
| /// Parses the string at the start of \p Str for a variable name. \returns |
| /// a VariableProperties structure holding the variable name and whether it |
| /// is the name of a pseudo variable, or an error holding a diagnostic |
| /// against \p SM if parsing fail. If parsing was successful, also strips |
| /// \p Str from the variable name. |
| static Expected<VariableProperties> parseVariable(StringRef &Str, |
| const SourceMgr &SM); |
| /// Parses \p Expr for a numeric substitution block at line \p LineNumber, |
| /// or before input is parsed if \p LineNumber is None. Parameter |
| /// \p IsLegacyLineExpr indicates whether \p Expr should be a legacy @LINE |
| /// expression and \p Context points to the class instance holding the live |
| /// string and numeric variables. \returns a pointer to the class instance |
| /// representing the expression whose value must be substitued, or an error |
| /// holding a diagnostic against \p SM if parsing fails. If substitution was |
| /// successful, sets \p DefinedNumericVariable to point to the class |
| /// representing the numeric variable defined in this numeric substitution |
| /// block, or None if this block does not define any variable. |
| static Expected<std::unique_ptr<Expression>> parseNumericSubstitutionBlock( |
| StringRef Expr, Optional<NumericVariable *> &DefinedNumericVariable, |
| bool IsLegacyLineExpr, Optional<size_t> LineNumber, |
| FileCheckPatternContext *Context, const SourceMgr &SM); |
| /// Parses the pattern in \p PatternStr and initializes this Pattern instance |
| /// accordingly. |
| /// |
| /// \p Prefix provides which prefix is being matched, \p Req describes the |
| /// global options that influence the parsing such as whitespace |
| /// canonicalization, \p SM provides the SourceMgr used for error reports. |
| /// \returns true in case of an error, false otherwise. |
| bool parsePattern(StringRef PatternStr, StringRef Prefix, SourceMgr &SM, |
| const FileCheckRequest &Req); |
| struct Match { |
| size_t Pos; |
| size_t Len; |
| }; |
| struct MatchResult { |
| Optional<Match> TheMatch; |
| Error TheError; |
| MatchResult(size_t MatchPos, size_t MatchLen, Error E) |
| : TheMatch(Match{MatchPos, MatchLen}), TheError(std::move(E)) {} |
| MatchResult(Match M, Error E) : TheMatch(M), TheError(std::move(E)) {} |
| MatchResult(Error E) : TheError(std::move(E)) {} |
| }; |
| /// Matches the pattern string against the input buffer \p Buffer. |
| /// |
| /// \returns either (1) an error resulting in no match or (2) a match possibly |
| /// with an error encountered while processing the match. |
| /// |
| /// The GlobalVariableTable StringMap in the FileCheckPatternContext class |
| /// instance provides the current values of FileCheck string variables and is |
| /// updated if this match defines new values. Likewise, the |
| /// GlobalNumericVariableTable StringMap in the same class provides the |
| /// current values of FileCheck numeric variables and is updated if this |
| /// match defines new numeric values. |
| MatchResult match(StringRef Buffer, const SourceMgr &SM) const; |
| /// Prints the value of successful substitutions. |
| void printSubstitutions(const SourceMgr &SM, StringRef Buffer, |
| SMRange MatchRange, FileCheckDiag::MatchType MatchTy, |
| std::vector<FileCheckDiag> *Diags) const; |
| void printFuzzyMatch(const SourceMgr &SM, StringRef Buffer, |
| std::vector<FileCheckDiag> *Diags) const; |
| |
| bool hasVariable() const { |
| return !(Substitutions.empty() && VariableDefs.empty()); |
| } |
| void printVariableDefs(const SourceMgr &SM, FileCheckDiag::MatchType MatchTy, |
| std::vector<FileCheckDiag> *Diags) const; |
| |
| Check::FileCheckType getCheckTy() const { return CheckTy; } |
| |
| int getCount() const { return CheckTy.getCount(); } |
| |
| private: |
| bool AddRegExToRegEx(StringRef RS, unsigned &CurParen, SourceMgr &SM); |
| void AddBackrefToRegEx(unsigned BackrefNum); |
| /// Computes an arbitrary estimate for the quality of matching this pattern |
| /// at the start of \p Buffer; a distance of zero should correspond to a |
| /// perfect match. |
| unsigned computeMatchDistance(StringRef Buffer) const; |
| /// Finds the closing sequence of a regex variable usage or definition. |
| /// |
| /// \p Str has to point in the beginning of the definition (right after the |
| /// opening sequence). \p SM holds the SourceMgr used for error reporting. |
| /// \returns the offset of the closing sequence within Str, or npos if it |
| /// was not found. |
| static size_t FindRegexVarEnd(StringRef Str, SourceMgr &SM); |
| |
| /// Parses \p Expr for the name of a numeric variable to be defined at line |
| /// \p LineNumber, or before input is parsed if \p LineNumber is None. |
| /// \returns a pointer to the class instance representing that variable, |
| /// creating it if needed, or an error holding a diagnostic against \p SM |
| /// should defining such a variable be invalid. |
| static Expected<NumericVariable *> parseNumericVariableDefinition( |
| StringRef &Expr, FileCheckPatternContext *Context, |
| Optional<size_t> LineNumber, ExpressionFormat ImplicitFormat, |
| const SourceMgr &SM); |
| /// Parses \p Name as a (pseudo if \p IsPseudo is true) numeric variable use |
| /// at line \p LineNumber, or before input is parsed if \p LineNumber is |
| /// None. Parameter \p Context points to the class instance holding the live |
| /// string and numeric variables. \returns the pointer to the class instance |
| /// representing that variable if successful, or an error holding a |
| /// diagnostic against \p SM otherwise. |
| static Expected<std::unique_ptr<NumericVariableUse>> parseNumericVariableUse( |
| StringRef Name, bool IsPseudo, Optional<size_t> LineNumber, |
| FileCheckPatternContext *Context, const SourceMgr &SM); |
| enum class AllowedOperand { LineVar, LegacyLiteral, Any }; |
| /// Parses \p Expr for use of a numeric operand at line \p LineNumber, or |
| /// before input is parsed if \p LineNumber is None. Accepts literal values, |
| /// numeric variables and function calls, depending on the value of \p AO. |
| /// \p MaybeInvalidConstraint indicates whether the text being parsed could |
| /// be an invalid constraint. \p Context points to the class instance holding |
| /// the live string and numeric variables. \returns the class representing |
| /// that operand in the AST of the expression or an error holding a |
| /// diagnostic against \p SM otherwise. If \p Expr starts with a "(" this |
| /// function will attempt to parse a parenthesized expression. |
| static Expected<std::unique_ptr<ExpressionAST>> |
| parseNumericOperand(StringRef &Expr, AllowedOperand AO, bool ConstraintParsed, |
| Optional<size_t> LineNumber, |
| FileCheckPatternContext *Context, const SourceMgr &SM); |
| /// Parses and updates \p RemainingExpr for a binary operation at line |
| /// \p LineNumber, or before input is parsed if \p LineNumber is None. The |
| /// left operand of this binary operation is given in \p LeftOp and \p Expr |
| /// holds the string for the full expression, including the left operand. |
| /// Parameter \p IsLegacyLineExpr indicates whether we are parsing a legacy |
| /// @LINE expression. Parameter \p Context points to the class instance |
| /// holding the live string and numeric variables. \returns the class |
| /// representing the binary operation in the AST of the expression, or an |
| /// error holding a diagnostic against \p SM otherwise. |
| static Expected<std::unique_ptr<ExpressionAST>> |
| parseBinop(StringRef Expr, StringRef &RemainingExpr, |
| std::unique_ptr<ExpressionAST> LeftOp, bool IsLegacyLineExpr, |
| Optional<size_t> LineNumber, FileCheckPatternContext *Context, |
| const SourceMgr &SM); |
| |
| /// Parses a parenthesized expression inside \p Expr at line \p LineNumber, or |
| /// before input is parsed if \p LineNumber is None. \p Expr must start with |
| /// a '('. Accepts both literal values and numeric variables. Parameter \p |
| /// Context points to the class instance holding the live string and numeric |
| /// variables. \returns the class representing that operand in the AST of the |
| /// expression or an error holding a diagnostic against \p SM otherwise. |
| static Expected<std::unique_ptr<ExpressionAST>> |
| parseParenExpr(StringRef &Expr, Optional<size_t> LineNumber, |
| FileCheckPatternContext *Context, const SourceMgr &SM); |
| |
| /// Parses \p Expr for an argument list belonging to a call to function \p |
| /// FuncName at line \p LineNumber, or before input is parsed if \p LineNumber |
| /// is None. Parameter \p FuncLoc is the source location used for diagnostics. |
| /// Parameter \p Context points to the class instance holding the live string |
| /// and numeric variables. \returns the class representing that call in the |
| /// AST of the expression or an error holding a diagnostic against \p SM |
| /// otherwise. |
| static Expected<std::unique_ptr<ExpressionAST>> |
| parseCallExpr(StringRef &Expr, StringRef FuncName, |
| Optional<size_t> LineNumber, FileCheckPatternContext *Context, |
| const SourceMgr &SM); |
| }; |
| |
| //===----------------------------------------------------------------------===// |
| // Check Strings. |
| //===----------------------------------------------------------------------===// |
| |
| /// A check that we found in the input file. |
| struct FileCheckString { |
| /// The pattern to match. |
| Pattern Pat; |
| |
| /// Which prefix name this check matched. |
| StringRef Prefix; |
| |
| /// The location in the match file that the check string was specified. |
| SMLoc Loc; |
| |
| /// All of the strings that are disallowed from occurring between this match |
| /// string and the previous one (or start of file). |
| std::vector<Pattern> DagNotStrings; |
| |
| FileCheckString(const Pattern &P, StringRef S, SMLoc L) |
| : Pat(P), Prefix(S), Loc(L) {} |
| |
| /// Matches check string and its "not strings" and/or "dag strings". |
| size_t Check(const SourceMgr &SM, StringRef Buffer, bool IsLabelScanMode, |
| size_t &MatchLen, FileCheckRequest &Req, |
| std::vector<FileCheckDiag> *Diags) const; |
| |
| /// Verifies that there is a single line in the given \p Buffer. Errors are |
| /// reported against \p SM. |
| bool CheckNext(const SourceMgr &SM, StringRef Buffer) const; |
| /// Verifies that there is no newline in the given \p Buffer. Errors are |
| /// reported against \p SM. |
| bool CheckSame(const SourceMgr &SM, StringRef Buffer) const; |
| /// Verifies that none of the strings in \p NotStrings are found in the given |
| /// \p Buffer. Errors are reported against \p SM and diagnostics recorded in |
| /// \p Diags according to the verbosity level set in \p Req. |
| bool CheckNot(const SourceMgr &SM, StringRef Buffer, |
| const std::vector<const Pattern *> &NotStrings, |
| const FileCheckRequest &Req, |
| std::vector<FileCheckDiag> *Diags) const; |
| /// Matches "dag strings" and their mixed "not strings". |
| size_t CheckDag(const SourceMgr &SM, StringRef Buffer, |
| std::vector<const Pattern *> &NotStrings, |
| const FileCheckRequest &Req, |
| std::vector<FileCheckDiag> *Diags) const; |
| }; |
| |
| } // namespace llvm |
| |
| #endif |