cppgraphqlgen/include/GeneratorLoader.h at main · wravery/cppgraphqlgen · GitHub

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// Licensed under the MIT License.

#pragma once

#ifndef GENERATORLOADER_H

#define GENERATORLOADER_H

#include "graphqlservice/GraphQLService.h"

namespace graphql::generator {

// Types that we understand and use to generate the skeleton of a service.

enum class [[nodiscard("unnecessary conversion")]] SchemaType {

Scalar,

Enum,

Input,

Union,

Interface,

Object,

Operation,

};

using SchemaTypeMap = std::map<std::string_view, SchemaType>;

// Any type can also have a list and/or non-nullable wrapper, and those can be nested.

// Since it's easier to express nullability than non-nullability in C++, we'll invert

// the presence of NonNull modifiers.

using TypeModifierStack = std::vector<service::TypeModifier>;

// Recursively visit a Type node until we reach a NamedType and we've

// taken stock of all of the modifier wrappers.

class [[nodiscard("unnecessary construction")]] TypeVisitor

{

public:

[[nodiscard("unnecessary construction")]] std::pair<std::string_view, TypeModifierStack>

getType();

void visit(const peg::ast_node& typeName);

private:

void visitNamedType(const peg::ast_node& namedType);

void visitListType(const peg::ast_node& listType);

void visitNonNullType(const peg::ast_node& nonNullType);

std::string_view _type;

TypeModifierStack _modifiers;

bool _nonNull = false;

};

// Recursively visit a Value node representing the default value on an input field

// and build a JSON representation of the hardcoded value.

class [[nodiscard("unnecessary construction")]] DefaultValueVisitor

{

public:

[[nodiscard("unnecessary construction")]] response::Value getValue();

void visit(const peg::ast_node& value);

private:

void visitIntValue(const peg::ast_node& intValue);

void visitFloatValue(const peg::ast_node& floatValue);

void visitStringValue(const peg::ast_node& stringValue);

void visitBooleanValue(const peg::ast_node& booleanValue);

void visitNullValue(const peg::ast_node& nullValue);

void visitEnumValue(const peg::ast_node& enumValue);

void visitListValue(const peg::ast_node& listValue);

void visitObjectValue(const peg::ast_node& objectValue);

response::Value _value;

};

} // namespace graphql::generator

#endif // GENERATORLOADER_H

cppgraphqlgen/include/GeneratorLoader.h at main · wravery/cppgraphqlgen · GitHub

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