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generate_ast.cc
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#include <fstream>
#include <iostream>
#include <map>
#include <string>
#include <vector>
using namespace std;
enum class FieldType {
Name,
Node,
NodeVec,
String,
Uint,
Loc,
Bool,
};
struct FieldDef {
string name;
FieldType type;
};
struct NodeDef {
string name;
string whitequarkName;
vector<FieldDef> fields;
};
NodeDef nodes[] = {
// alias bar foo
{
"Alias",
"alias",
vector<FieldDef>({{"from", FieldType::Node}, {"to", FieldType::Node}}),
},
// logical and
{
"And",
"and",
vector<FieldDef>({{"left", FieldType::Node}, {"right", FieldType::Node}}),
},
// &&=
{
"AndAsgn",
"and_asgn",
vector<FieldDef>({{"left", FieldType::Node}, {"right", FieldType::Node}}),
},
// Required positional argument
{
"Arg",
"arg",
vector<FieldDef>({{"name", FieldType::Name}}),
},
// Wraps block arg, method arg, and send arg
{
"Args",
"args",
vector<FieldDef>({{"args", FieldType::NodeVec}}),
},
// inline array with elements
{
"Array",
"array",
vector<FieldDef>({{"elts", FieldType::NodeVec}}),
},
// Pattern matching case with an array: `in [x]`
{
"ArrayPattern",
"array_pattern",
vector<FieldDef>({{"elts", FieldType::NodeVec}}),
},
// Pattern matching case with an array containing a trailing comma: `in [x, ]`
{
"ArrayPatternWithTail",
"array_pattern_with_tail",
vector<FieldDef>({{"elts", FieldType::NodeVec}}),
},
// Used for $`, $& etc magic regex globals
{
"Backref",
"back_ref",
vector<FieldDef>({{"name", FieldType::Name}}),
},
{
"Assign",
"assign",
vector<FieldDef>({{"lhs", FieldType::Node}, {"rhs", FieldType::Node}}),
},
// wraps any set of statements implicitly grouped by syntax (e.g. def, class bodies)
{
"Begin",
"begin",
vector<FieldDef>({{"stmts", FieldType::NodeVec}}),
},
// Node is always a send, which is previous call, args is arguments of body
{
"Block",
"block",
vector<FieldDef>({{"send", FieldType::Node}, {"args", FieldType::Node}, {"body", FieldType::Node}}),
},
// Wraps a `&foo` argument in an argument list
{
"Blockarg",
"blockarg",
vector<FieldDef>({{"name", FieldType::Name}}),
},
// e.g. map(&:token)
{
"BlockPass",
"block_pass",
vector<FieldDef>({{"block", FieldType::Node}}),
},
// `break` keyword
{
"Break",
"break",
vector<FieldDef>({{"exprs", FieldType::NodeVec}}),
},
// case statement; whens is a list of (when cond expr) nodes
{
"Case",
"case",
vector<FieldDef>({{"condition", FieldType::Node}, {"whens", FieldType::NodeVec}, {"else_", FieldType::Node}}),
},
// Pattern matching case: `case x; in a; end`
{
"CaseMatch",
"case_match",
vector<FieldDef>({{"expr", FieldType::Node}, {"inBodies", FieldType::NodeVec}, {"elseBody", FieldType::Node}}),
},
// appears in the `scope` of a `::Constant` `Const` node
{
"Cbase",
"cbase",
vector<FieldDef>(),
},
// superclass is Null if empty superclass, body is Begin if multiple statements
{
"Class",
"class",
vector<FieldDef>({{"declLoc", FieldType::Loc},
{"name", FieldType::Node},
{"superclass", FieldType::Node},
{"body", FieldType::Node}}),
},
// complex number literal like "42i"
{
"Complex",
"complex",
vector<FieldDef>({{"value", FieldType::String}}),
},
// Used as path to Select, scope is Null for end of specified list
{
"Const",
"const",
vector<FieldDef>({{"scope", FieldType::Node}, {"name", FieldType::Name}}),
},
// Used inside a `Mlhs` if a constant is part of multiple assignment
{
"ConstLhs",
"casgn",
vector<FieldDef>({{"scope", FieldType::Node}, {"name", FieldType::Name}}),
},
// Pattern matching case with a const: `in A`
{
"ConstPattern",
"const_pattern",
vector<FieldDef>({{"scope", FieldType::Node}, {"pattern", FieldType::Node}}),
},
// &. "conditional-send"/safe-navigation operator
{
"CSend",
"csend",
vector<FieldDef>({{"receiver", FieldType::Node},
{"method", FieldType::Name},
{"methodLoc", FieldType::Loc},
{"args", FieldType::NodeVec}}),
},
// @@foo class variable
{
"CVar",
"cvar",
vector<FieldDef>({{"name", FieldType::Name}}),
},
// @@foo class variable in the lhs of an Mlhs
{
"CVarLhs",
"cvasgn",
vector<FieldDef>({{"name", FieldType::Name}}),
},
// args may be NULL, body does not have to be a block.
{
"DefMethod",
"def",
vector<FieldDef>({{"declLoc", FieldType::Loc},
{"name", FieldType::Name},
{"args", FieldType::Node},
{"body", FieldType::Node}}),
},
// defined?() built-in pseudo-function
{
"Defined",
"defined?",
vector<FieldDef>({{"value", FieldType::Node}}),
},
// def <expr>.name singleton-class method def
{
"DefS",
"defs",
vector<FieldDef>({{"declLoc", FieldType::Loc},
{"singleton", FieldType::Node},
{"name", FieldType::Name},
{"args", FieldType::Node},
{"body", FieldType::Node}}),
},
// def <expr>.name singleton-class name method def
{
"DefsHead",
"defshead",
vector<FieldDef>({
{"definee", FieldType::Node},
{"name", FieldType::Name},
}),
},
// string with an interpolation, all nodes are concatenated in a single string
{
"DString",
"dstr",
vector<FieldDef>({{"nodes", FieldType::NodeVec}}),
},
// symbol with an interpolation, :"foo#{bar}"
{
"DSymbol",
"dsym",
vector<FieldDef>({{"nodes", FieldType::NodeVec}}),
},
// ... flip-flop operator inside a conditional
{
"EFlipflop",
"eflipflop",
vector<FieldDef>({{"left", FieldType::Node}, {"right", FieldType::Node}}),
},
// Pattern matching implicit empty `else` block
{
"EmptyElse",
"empty_else",
vector<FieldDef>(),
},
// __ENCODING__
{
"EncodingLiteral",
"__ENCODING__",
vector<FieldDef>(),
},
// "ensure" keyword
{
"Ensure",
"ensure",
vector<FieldDef>({{"body", FieldType::Node}, {"ensure", FieldType::Node}}),
},
// Exclusive range 1...3
{
"ERange",
"erange",
vector<FieldDef>({{"from", FieldType::Node}, {"to", FieldType::Node}}),
},
// "false" keyword
{
"False",
"false",
vector<FieldDef>(),
},
// Find pattern
{
"FindPattern",
"find_pattern",
vector<FieldDef>({{"elements", FieldType::NodeVec}}),
},
// __FILE__
{
"FileLiteral",
"__FILE__",
vector<FieldDef>(),
},
// For loop
{
"For",
"for",
vector<FieldDef>({{"vars", FieldType::Node}, {"expr", FieldType::Node}, {"body", FieldType::Node}}),
},
// "..." argument forwarding in definition site
{
"ForwardArg",
"forward_arg",
vector<FieldDef>(),
},
// "..." argument forwarding in call site
{
"ForwardedArgs",
"forwarded_args",
vector<FieldDef>(),
},
// float literal like "1.2"
{
"Float",
"float",
vector<FieldDef>({{"val", FieldType::String}}),
},
// Global variable ($foo)
{
"GVar",
"gvar",
vector<FieldDef>({{"name", FieldType::Name}}),
},
// Global variable in the lhs of an mlhs
{
"GVarLhs",
"gvasgn",
vector<FieldDef>({{"name", FieldType::Name}}),
},
// Hash literal, entries are `Pair`s,
{
"Hash",
"hash",
vector<FieldDef>({{"kwargs", FieldType::Bool}, {"pairs", FieldType::NodeVec}}),
},
// Pattern matching hash pattern: `in {x: y}`
{
"HashPattern",
"hash_pattern",
vector<FieldDef>({{"pairs", FieldType::NodeVec}}),
},
// Bareword identifier (foo); should only exist transiently while parsing
{
"Ident",
"UNUSED_ident",
vector<FieldDef>({{"name", FieldType::Name}}),
},
{
"If",
"if",
vector<FieldDef>({{"condition", FieldType::Node}, {"then_", FieldType::Node}, {"else_", FieldType::Node}}),
},
// Pattern matching if guard: `in x if foo`
{"IfGuard", "if_guard", vector<FieldDef>({{"condition", FieldType::Node}})},
// .. flip-flop operator inside a conditional
{
"IFlipflop",
"iflipflop",
vector<FieldDef>({{"left", FieldType::Node}, {"right", FieldType::Node}}),
},
// Pattern matching pattern: `in x`
{
"InPattern",
"in_pattern",
vector<FieldDef>({{"pattern", FieldType::Node}, {"guard", FieldType::Node}, {"body", FieldType::Node}}),
},
// inclusive range. Subnodes need not be integers nor literals
{
"IRange",
"irange",
vector<FieldDef>({{"from", FieldType::Node}, {"to", FieldType::Node}}),
},
{
"Integer",
"int",
vector<FieldDef>({{"val", FieldType::String}}),
},
// instance variable reference
{
"IVar",
"ivar",
vector<FieldDef>({{"name", FieldType::Name}}),
},
// @rules in `@rules, invalid_rules = ...`
{
"IVarLhs",
"ivasgn",
vector<FieldDef>({{"name", FieldType::Name}}),
},
// Required keyword argument inside an (args)
{
"Kwarg",
"kwarg",
vector<FieldDef>({{"name", FieldType::Name}}),
},
// Keyword nil argument
{
"Kwnilarg",
"kwnilarg",
vector<FieldDef>(),
},
// explicit `begin` keyword.
// `kwbegin` is emitted _only_ for post-while and post-until loops
// because they act differently
{
"Kwbegin",
"kwbegin",
vector<FieldDef>({{"stmts", FieldType::NodeVec}}),
},
// optional keyword arg with default value provided
{
"Kwoptarg",
"kwoptarg",
vector<FieldDef>({{"name", FieldType::Name}, {"nameLoc", FieldType::Loc}, {"default_", FieldType::Node}}),
},
// **kwargs arg
{
"Kwrestarg",
"kwrestarg",
vector<FieldDef>({{"name", FieldType::Name}}),
},
// **foo splat
{
"Kwsplat",
"kwsplat",
vector<FieldDef>({{"expr", FieldType::Node}}),
},
{
"LineLiteral",
"__LINE__",
vector<FieldDef>(),
},
// local variable referense
{
"LVar",
"lvar",
vector<FieldDef>({{"name", FieldType::Name}}),
},
// invalid_rules in `@rules, invalid_rules = ...`
{
"LVarLhs",
"lvasgn",
vector<FieldDef>({{"name", FieldType::Name}}),
},
// Pattern matching pattern variable with an alternation: `in A | B`
{
"MatchAlt",
"match_alt",
vector<FieldDef>({{"left", FieldType::Node}, {"right", FieldType::Node}}),
},
// Pattern matching pattern assigning a variable: `in A => x`
{
"MatchAs",
"match_as",
vector<FieldDef>({{"value", FieldType::Node}, {"as", FieldType::Node}}),
},
// [regex literal] =~ value; autovivifies local vars from match grops
{
"MatchAsgn",
"match_with_lvasgn",
vector<FieldDef>({{"regex", FieldType::Node}, {"expr", FieldType::Node}}),
},
// /foo/ regex literal inside an `if`; implicitly matches against $_
{
"MatchCurLine",
"match_current_line",
vector<FieldDef>({{"cond", FieldType::Node}}),
},
// Pattern matching pattern variable with nil
{
"MatchNilPattern",
"match_nil_pattern",
vector<FieldDef>(),
},
// Pattern matching pattern with `=`
{
"MatchPattern",
"match_pattern",
vector<FieldDef>({{"lhs", FieldType::Node}, {"rhs", FieldType::Node}}),
},
// Pattern matching pattern with `in`
{
"MatchPatternP",
"match_pattern_p",
vector<FieldDef>({{"lhs", FieldType::Node}, {"rhs", FieldType::Node}}),
},
// Pattern matching pattern variable with rest
{
"MatchRest",
"match_rest",
vector<FieldDef>({{"var", FieldType::Node}}),
},
// Pattern matching pattern variable
{
"MatchVar",
"match_var",
vector<FieldDef>({{"name", FieldType::Name}}),
},
// Pattern matching pattern with a trailing comma: `in x,`
{
"MatchWithTrailingComma",
"match_with_trailing_comma",
vector<FieldDef>({{"match", FieldType::Node}}),
},
// multiple left hand sides: `@rules, invalid_rules = ...`
{
"Masgn",
"masgn",
vector<FieldDef>({{"lhs", FieldType::Node}, {"rhs", FieldType::Node}}),
},
// multiple left hand sides: `@rules, invalid_rules = ...`
{
"Mlhs",
"mlhs",
vector<FieldDef>({{"exprs", FieldType::NodeVec}}),
},
{
"Module",
"module",
vector<FieldDef>({{"declLoc", FieldType::Loc}, {"name", FieldType::Node}, {"body", FieldType::Node}}),
},
// next(args); `next` is like `return` but for blocks
{
"Next",
"next",
vector<FieldDef>({{"exprs", FieldType::NodeVec}}),
},
{
"Nil",
"nil",
vector<FieldDef>(),
},
// $1, $2, etc
{
"NthRef",
"nth_ref",
vector<FieldDef>({{"ref", FieldType::Uint}}),
},
// numbered parameters
{
"NumParams",
"numparams",
vector<FieldDef>({{"decls", FieldType::NodeVec}}),
},
// a block with numbered parameters
{
"NumBlock",
"numblock",
vector<FieldDef>({{"send", FieldType::Node}, {"args", FieldType::Node}, {"body", FieldType::Node}}),
},
// foo += 6 for += and other ops
{
"OpAsgn",
"op_asgn",
vector<FieldDef>({{"left", FieldType::Node}, {"op", FieldType::Name}, {"right", FieldType::Node}}),
},
// logical or
{
"Or",
"or",
vector<FieldDef>({{"left", FieldType::Node}, {"right", FieldType::Node}}),
},
// foo ||= bar
{
"OrAsgn",
"or_asgn",
vector<FieldDef>({{"left", FieldType::Node}, {"right", FieldType::Node}}),
},
// optional positional argument inside an (args) list
{
"Optarg",
"optarg",
vector<FieldDef>({{"name", FieldType::Name}, {"nameLoc", FieldType::Loc}, {"default_", FieldType::Node}}),
},
// entries of Hash
{
"Pair",
"pair",
vector<FieldDef>({{"key", FieldType::Node}, {"value", FieldType::Node}}),
},
// Pattern matching pined variable: `in [a, b, ^x]`
{
"Pin",
"pin",
vector<FieldDef>({{"var", FieldType::Node}}),
},
// END {...}
{
"Postexe",
"postexe",
vector<FieldDef>({{"body", FieldType::Node}}),
},
// BEGIN{...}
{
"Preexe",
"preexe",
vector<FieldDef>({{"body", FieldType::Node}}),
},
// wraps the sole argument of a 1-arg block
// because there's a diffence between m {|a|} and m{|a,|}
{
"Procarg0",
"procarg0",
vector<FieldDef>({{"arg", FieldType::Node}}),
},
// rational number literal like "42r"
{
"Rational",
"rational",
vector<FieldDef>({{"val", FieldType::String}}),
},
// `redo` keyword
{
"Redo",
"redo",
vector<FieldDef>(),
},
// regular expression; string interpolation in body is flattened into the array
{
"Regexp",
"regexp",
vector<FieldDef>({{"regex", FieldType::NodeVec}, {"opts", FieldType::Node}}),
},
// opts of regexp
{
"Regopt",
"regopt",
vector<FieldDef>({{"opts", FieldType::String}}),
},
// body of a rescue
{
"Resbody",
"resbody",
vector<FieldDef>({{"exception", FieldType::Node}, {"var", FieldType::Node}, {"body", FieldType::Node}}),
},
// begin; ..; rescue; end; rescue is an array of Resbody
{
"Rescue",
"rescue",
vector<FieldDef>({{"body", FieldType::Node}, {"rescue", FieldType::NodeVec}, {"else_", FieldType::Node}}),
},
// *arg argument inside an (args)
{
"Restarg",
"restarg",
vector<FieldDef>({{"name", FieldType::Name}, {"nameLoc", FieldType::Loc}}),
},
// `retry` keyword
{
"Retry",
"retry",
vector<FieldDef>(),
},
// `return` keyword
{
"Return",
"return",
vector<FieldDef>({{"exprs", FieldType::NodeVec}}),
},
// class << expr; body; end;
{
"SClass",
"sclass",
vector<FieldDef>({{"declLoc", FieldType::Loc}, {"expr", FieldType::Node}, {"body", FieldType::Node}}),
},
{
"Self",
"self",
vector<FieldDef>(),
},
// invocation
{
"Send",
"send",
vector<FieldDef>({{"receiver", FieldType::Node},
{"method", FieldType::Name},
{"methodLoc", FieldType::Loc},
{"args", FieldType::NodeVec}}),
},
// m { |;shadowarg| }
{
"Shadowarg",
"shadowarg",
vector<FieldDef>({{"name", FieldType::Name}}),
},
// *foo splat operator
{
"Splat",
"splat",
vector<FieldDef>({{"var", FieldType::Node}}),
},
{
"SplatLhs",
"splat",
vector<FieldDef>({{"var", FieldType::Node}}),
},
// string literal
{
"String",
"str",
vector<FieldDef>({{"val", FieldType::Name}}),
},
{
"Super",
"super",
vector<FieldDef>({{"args", FieldType::NodeVec}}),
},
// symbol literal
{
"Symbol",
"sym",
vector<FieldDef>({{"val", FieldType::Name}}),
},
{
"True",
"true",
vector<FieldDef>(),
},
// "undef" keyword
{
"Undef",
"undef",
vector<FieldDef>({{"exprs", FieldType::NodeVec}}),
},
// Pattern matching unless guard: `in x unless foo`
{
"UnlessGuard",
"unless_guard",
vector<FieldDef>({{"condition", FieldType::Node}}),
},
{
"Until",
"until",
vector<FieldDef>({{"cond", FieldType::Node}, {"body", FieldType::Node}}),
},
{
"UntilPost",
"until_post",
vector<FieldDef>({{"cond", FieldType::Node}, {"body", FieldType::Node}}),
},
{
"When",
"when",
vector<FieldDef>({{"patterns", FieldType::NodeVec}, {"body", FieldType::Node}}),
},
{
"While",
"while",
vector<FieldDef>({{"cond", FieldType::Node}, {"body", FieldType::Node}}),
},
// There's a difference between while_post and while loops:
// while_post runs the body of the loop at least once.
{
"WhilePost",
"while_post",
vector<FieldDef>({{"cond", FieldType::Node}, {"body", FieldType::Node}}),
},
{
"XString",
"xstr",
vector<FieldDef>({{"nodes", FieldType::NodeVec}}),
},
{
"Yield",
"yield",
vector<FieldDef>({{"exprs", FieldType::NodeVec}}),
},
{
"ZSuper",
"zsuper",
vector<FieldDef>(),
},
};
string constructorArgType(FieldType arg) {
switch (arg) {
case FieldType::Name:
return "core::NameRef";
case FieldType::Node:
return "std::unique_ptr<Node>";
case FieldType::NodeVec:
return "NodeVec";
case FieldType::String:
return "std::string_view";
case FieldType::Uint:
return "uint32_t";
case FieldType::Loc:
return "core::LocOffsets";
case FieldType::Bool:
return "bool";
}
}
string fieldType(FieldType arg) {
switch (arg) {
case FieldType::Name:
return "core::NameRef";
case FieldType::Node:
return "std::unique_ptr<Node>";
case FieldType::NodeVec:
return "NodeVec";
case FieldType::String:
return "const std::string";
case FieldType::Uint:
return "uint32_t";
case FieldType::Loc:
return "core::LocOffsets";
case FieldType::Bool:
return "bool";
}
}
void emitNodeHeader(ostream &out, NodeDef &node) {
out << "class " << node.name << " final : public Node {" << '\n';
out << "public:" << '\n';
// generate constructor
out << " " << node.name << "(core::LocOffsets loc";
for (auto &arg : node.fields) {
out << ", " << constructorArgType(arg.type) << " " << arg.name;
}
out << ")" << '\n';
out << " : Node(loc)";
for (auto &arg : node.fields) {
out << ", " << arg.name << "(";
if (arg.type == FieldType::Node || arg.type == FieldType::NodeVec) {
out << "std::move(";
}
out << arg.name;
if (arg.type == FieldType::Node || arg.type == FieldType::NodeVec) {
out << ")";
}
out << ")";
}
out << '\n';
out << "{";
out << R"( categoryCounterInc("nodes", ")" << node.name << "\");" << '\n';
out << "}" << '\n';
out << '\n';
// Generate fields
for (auto &arg : node.fields) {
out << " " << fieldType(arg.type) << " " << arg.name << ";" << '\n';
}
out << '\n';
out << " virtual std::string toStringWithTabs(const core::GlobalState &gs, int tabs = 0) const;" << '\n';
out << " virtual std::string toJSON(const core::GlobalState &gs, int tabs = 0);" << '\n';
out << " virtual std::string toJSONWithLocs(const core::GlobalState &gs, core::FileRef file, int tabs = 0);"
<< '\n';
out << " virtual std::string toWhitequark(const core::GlobalState &gs, int tabs = 0);" << '\n';
out << " virtual std::string nodeName();" << '\n';
out << "};" << '\n';
out << '\n';
}
void emitNodeClassfile(ostream &out, NodeDef &node) {
out << " std::string " << node.name << "::nodeName() {" << '\n';
out << " return \"" << node.name << "\";" << '\n';
out << " };" << '\n' << '\n';
out << " std::string " << node.name << "::toStringWithTabs(const core::GlobalState &gs, int tabs) const {" << '\n'
<< " fmt::memory_buffer buf;" << '\n';
out << " fmt::format_to(std::back_inserter(buf), \"" << node.name << " {{\\n\");" << '\n';
// Generate fields
for (auto &arg : node.fields) {
if (arg.type == FieldType::Loc) {
continue;
}
out << " printTabs(buf, tabs + 1);" << '\n';
switch (arg.type) {
case FieldType::Name:
out << " fmt::format_to(std::back_inserter(buf), \"" << arg.name << " = {}\\n\", " << arg.name
<< ".showRaw(gs));" << '\n';
break;
case FieldType::Node:
out << " fmt::format_to(std::back_inserter(buf), \"" << arg.name << " = \");\n";
out << " printNode(buf, " << arg.name << ", gs, tabs + 1);\n";
break;
case FieldType::NodeVec:
out << " fmt::format_to(std::back_inserter(buf), \"" << arg.name << " = [\\n\");\n";
out << " for (auto &&a: " << arg.name << ") {\n";
out << " printTabs(buf, tabs + 2);\n";
out << " printNode(buf, a, gs, tabs + 2);\n";
out << " }" << '\n';
out << " printTabs(buf, tabs + 1);\n";
out << " fmt::format_to(std::back_inserter(buf), \"]\\n\");\n";
break;
case FieldType::String:
out << " fmt::format_to(std::back_inserter(buf), \"" << arg.name << " = \\\"{}\\\"\\n\", "
<< arg.name << ");\n";
break;
case FieldType::Uint:
out << " fmt::format_to(std::back_inserter(buf), \"" << arg.name << " = {}\\n\", " << arg.name
<< ");\n";
break;
case FieldType::Loc:
// Placate the compiler; we skip these
abort();
break;
case FieldType::Bool:
out << " fmt::format_to(std::back_inserter(buf), \"" << arg.name << " = {}\\n\", " << arg.name
<< ");\n";
break;
}
}
out << " printTabs(buf, tabs);\n";
out << " fmt::format_to(std::back_inserter(buf), \"}}\");\n";
out << " return to_string(buf);\n";
out << " }" << '\n';
out << '\n';
// toJSON
// TODO: This function would be faster and safer if we used rapidjson or proto to build the JSON.
// (See tracing.cc and/or any of the proto stuff)
out << " std::string " << node.name << "::toJSON(const core::GlobalState &gs, int tabs) {" << '\n'
<< " fmt::memory_buffer buf;" << '\n';
out << " fmt::format_to(std::back_inserter(buf), \"{{\\n\");\n";
out << " printTabs(buf, tabs + 1);" << '\n';
auto maybeComma = "";
if (!node.fields.empty()) {
maybeComma = ",";
}
out << R"( fmt::format_to(std::back_inserter(buf), "\"type\" : \")" << node.name << "\\\"" << maybeComma
<< "\\n\");\n";
int i = -1;
// Generate fields
for (auto &arg : node.fields) {
i++;
if (arg.type == FieldType::Loc) {
continue;
}
maybeComma = "";
for (int j = i + 1; j < node.fields.size(); j++) {
if (node.fields[j].type != FieldType::Loc) {
maybeComma = ",";
break;
}
}
out << " printTabs(buf, tabs + 1);" << '\n';
switch (arg.type) {
case FieldType::Name:
out << " fmt::format_to(std::back_inserter(buf), \"\\\"" << arg.name << "\\\" : \\\"{}\\\""
<< maybeComma << "\\n\", JSON::escape(" << arg.name << ".show(gs)));\n";
break;
case FieldType::Node:
out << " fmt::format_to(std::back_inserter(buf), \"\\\"" << arg.name << "\\\" : \");\n";
out << " printNodeJSON(buf, " << arg.name << ", gs, tabs + 1);\n";
out << " fmt::format_to(std::back_inserter(buf), \"" << maybeComma << "\\n\");\n";
break;
case FieldType::NodeVec:
out << " fmt::format_to(std::back_inserter(buf), \"\\\"" << arg.name << "\\\" : [\\n\");\n";
out << " int i = -1;" << '\n';
out << " for (auto &&a: " << arg.name << ") { \n";
out << " i++;\n";
out << " printTabs(buf, tabs + 2);\n";
out << " printNodeJSON(buf, a, gs, tabs + 2);\n";
out << " if (i + 1 < " << arg.name << ".size()) {\n";
out << " fmt::format_to(std::back_inserter(buf), \",\");" << '\n';
out << " }" << '\n';
out << " fmt::format_to(std::back_inserter(buf), \"\\n\");\n";
out << " }" << '\n';
out << " printTabs(buf, tabs + 1);\n";
out << " fmt::format_to(std::back_inserter(buf), \"]" << maybeComma << "\\n\")\n;";
break;
case FieldType::String:
out << " fmt::format_to(std::back_inserter(buf), \"\\\"" << arg.name << "\\\" : \\\"{}\\\""
<< maybeComma << "\\n\", " << arg.name << ");\n";
break;
case FieldType::Uint:
out << R"( fmt::format_to(std::back_inserter(buf), "\")" << arg.name << R"(\" : \"{}\")"
<< maybeComma << "\\n\", " << arg.name << ");\n";
break;
case FieldType::Loc:
// quiet the compiler; we skip Loc fields above
abort();
case FieldType::Bool:
out << " fmt::format_to(std::back_inserter(buf), \"" << arg.name << " = {}\\n\", " << arg.name
<< ");\n";
break;
}
}
out << " printTabs(buf, tabs);" << '\n';
out << " fmt::format_to(std::back_inserter(buf), \"}}\");\n";
out << " return to_string(buf);\n";
out << " }" << '\n';
out << '\n';
// toJSONWithLocs
out << " std::string " << node.name
<< "::toJSONWithLocs(const core::GlobalState &gs, core::FileRef file, int tabs) {" << '\n'
<< " fmt::memory_buffer buf;" << '\n';
out << " fmt::format_to(std::back_inserter(buf), \"{{\\n\");\n";
out << " printTabs(buf, tabs + 1);" << '\n';
maybeComma = "";
if (!node.fields.empty()) {
maybeComma = ",";
}
out << R"( fmt::format_to(std::back_inserter(buf), "\"type\" : \")" << node.name << "\\\"" << maybeComma
<< "\\n\");\n";
i = -1;
// Generate fields
for (auto &arg : node.fields) {
i++;
maybeComma = "";
if (i < node.fields.size() - 1) {
maybeComma = ",";
}