| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SKSL_FUNCTIONDECLARATION |
| #define SKSL_FUNCTIONDECLARATION |
| |
| #include "include/private/SkSLSymbol.h" |
| #include "include/private/SkTArray.h" |
| #include "src/sksl/SkSLIntrinsicList.h" |
| |
| #include <cstdint> |
| #include <memory> |
| #include <string> |
| #include <string_view> |
| #include <vector> |
| |
| namespace SkSL { |
| |
| class Context; |
| class ExpressionArray; |
| class FunctionDefinition; |
| class Position; |
| class SymbolTable; |
| class Type; |
| class Variable; |
| |
| struct Modifiers; |
| |
| // This enum holds every intrinsic supported by SkSL. |
| #define SKSL_INTRINSIC(name) k_##name##_IntrinsicKind, |
| enum IntrinsicKind : int8_t { |
| kNotIntrinsic = -1, |
| SKSL_INTRINSIC_LIST |
| }; |
| #undef SKSL_INTRINSIC |
| |
| /** |
| * A function declaration (not a definition -- does not contain a body). |
| */ |
| class FunctionDeclaration final : public Symbol { |
| public: |
| inline static constexpr Kind kSymbolKind = Kind::kFunctionDeclaration; |
| |
| FunctionDeclaration(Position pos, |
| const Modifiers* modifiers, |
| std::string_view name, |
| std::vector<const Variable*> parameters, |
| const Type* returnType, |
| bool builtin); |
| |
| static const FunctionDeclaration* Convert(const Context& context, |
| SymbolTable& symbols, |
| Position pos, |
| Position modifiersPos, |
| const Modifiers* modifiers, |
| std::string_view name, |
| std::vector<std::unique_ptr<Variable>> parameters, |
| Position returnTypePos, |
| const Type* returnType); |
| |
| const Modifiers& modifiers() const { |
| return *fModifiers; |
| } |
| |
| const FunctionDefinition* definition() const { |
| return fDefinition; |
| } |
| |
| void setDefinition(const FunctionDefinition* definition) const { |
| fDefinition = definition; |
| fIntrinsicKind = kNotIntrinsic; |
| } |
| |
| const std::vector<const Variable*>& parameters() const { |
| return fParameters; |
| } |
| |
| const Type& returnType() const { |
| return *fReturnType; |
| } |
| |
| bool isBuiltin() const { |
| return fBuiltin; |
| } |
| |
| bool isMain() const { |
| return fIsMain; |
| } |
| |
| IntrinsicKind intrinsicKind() const { |
| return fIntrinsicKind; |
| } |
| |
| bool isIntrinsic() const { |
| return this->intrinsicKind() != kNotIntrinsic; |
| } |
| |
| std::string mangledName() const; |
| |
| std::string description() const override; |
| |
| bool matches(const FunctionDeclaration& f) const; |
| |
| /** |
| * Determine the effective types of this function's parameters and return value when called with |
| * the given arguments. This is relevant for functions with generic parameter types, where this |
| * will collapse the generic types down into specific concrete types. |
| * |
| * Returns true if it was able to select a concrete set of types for the generic function, false |
| * if there is no possible way this can match the argument types. Note that even a true return |
| * does not guarantee that the function can be successfully called with those arguments, merely |
| * indicates that an attempt should be made. If false is returned, the state of |
| * outParameterTypes and outReturnType are undefined. |
| * |
| * This always assumes narrowing conversions are *allowed*. The calling code needs to verify |
| * that each argument can actually be coerced to the final parameter type, respecting the |
| * narrowing-conversions flag. This is handled in callCost(), or in convertCall() (via coerce). |
| */ |
| using ParamTypes = SkSTArray<8, const Type*>; |
| bool determineFinalTypes(const ExpressionArray& arguments, |
| ParamTypes* outParameterTypes, |
| const Type** outReturnType) const; |
| |
| private: |
| mutable const FunctionDefinition* fDefinition; |
| const Modifiers* fModifiers; |
| std::vector<const Variable*> fParameters; |
| const Type* fReturnType; |
| bool fBuiltin; |
| bool fIsMain; |
| mutable IntrinsicKind fIntrinsicKind = kNotIntrinsic; |
| |
| using INHERITED = Symbol; |
| }; |
| |
| } // namespace SkSL |
| |
| #endif |