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parser.h
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parser.h
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#pragma once
#include "string.h"
#include "list.h"
#include "token.h"
#include "type_system.h"
#include "ir.h"
struct Ast_Expression;
struct Ast_Expression_Tuple;
struct Ast_Variable;
struct Ast_Import;
struct Ast_Struct_Member;
struct Ast_Enum_Member;
struct Ast_Statement;
struct Ast_Defer;
struct Ast_Specifier;
struct Ast_BaseType;
struct Ast_Type;
struct Ast_Function;
struct Ast_Struct;
struct Ast_Enum;
struct Ast_Code;
struct Ast_Scope;
struct Ast_Return;
struct Ast_Break;
enum IntrinsicID
{
INTRINSIC_SYSTEM_CALL = 0,
INTRINSIC_COUNT,
INTRINSIC_INVALID = INTRINSIC_COUNT
};
enum Ast_Specifier_Kind
{
AST_SPECIFIER_POINTER,
AST_SPECIFIER_OPTIONAL,
AST_SPECIFIER_FIXED_ARRAY,
AST_SPECIFIER_ARRAY
};
struct Ast_Specifier
{
Ast_Specifier_Kind kind;
Token* token;
Ast_Expression* size_expression;
};
enum Ast_BaseType_Kind
{
AST_BASETYPE_USERTYPE,
AST_BASETYPE_PRIMITIVE,
AST_BASETYPE_FUNCTION,
AST_BASETYPE_TUPLE
};
struct Ast_BaseType_Function
{
Ast_Type* input;
Ast_Type* output;
};
struct Ast_BaseType
{
Ast_BaseType_Kind kind;
Token* token;
union
{
Array<Ast_Type> tuple;
Ast_BaseType_Function function;
};
};
struct Ast_Type
{
Array<Ast_Specifier> specifiers;
Ast_BaseType basetype;
};
enum Ast_Expression_Kind
{
AST_EXPRESSION_TERMINAL_NAME,
AST_EXPRESSION_TERMINAL_FUNCTION,
AST_EXPRESSION_TERMINAL_INTRINSIC,
AST_EXPRESSION_TERMINAL_LITERAL,
AST_EXPRESSION_TERMINAL_VARIABLE,
AST_EXPRESSION_TERMINAL_STRUCT,
AST_EXPRESSION_TERMINAL_ENUM,
AST_EXPRESSION_TERMINAL_PRIMITIVE,
AST_EXPRESSION_TERMINAL_STRUCT_MEMBER,
AST_EXPRESSION_TERMINAL_ENUM_MEMBER,
AST_EXPRESSION_TERMINAL_ARRAY_LENGTH,
AST_EXPRESSION_TERMINAL_ARRAY_BEGIN,
AST_EXPRESSION_TERMINAL_ARRAY_END,
AST_EXPRESSION_UNARY_BITWISE_NOT,
AST_EXPRESSION_UNARY_NOT,
AST_EXPRESSION_UNARY_MINUS,
AST_EXPRESSION_UNARY_PLUS,
AST_EXPRESSION_UNARY_REFERENCE_OF,
AST_EXPRESSION_UNARY_ADDRESS_OF,
AST_EXPRESSION_BINARY_COMPARE_EQUAL,
AST_EXPRESSION_BINARY_COMPARE_NOT_EQUAL,
AST_EXPRESSION_BINARY_COMPARE_LESS,
AST_EXPRESSION_BINARY_COMPARE_LESS_OR_EQUAL,
AST_EXPRESSION_BINARY_COMPARE_GREATER,
AST_EXPRESSION_BINARY_COMPARE_GREATER_OR_EQUAL,
AST_EXPRESSION_BINARY_DOT,
AST_EXPRESSION_BINARY_ADD,
AST_EXPRESSION_BINARY_SUBTRACT,
AST_EXPRESSION_BINARY_MULTIPLY,
AST_EXPRESSION_BINARY_DIVIDE,
AST_EXPRESSION_BINARY_MODULO,
AST_EXPRESSION_BINARY_BITWISE_OR,
AST_EXPRESSION_BINARY_BITWISE_XOR,
AST_EXPRESSION_BINARY_BITWISE_AND,
AST_EXPRESSION_BINARY_LEFT_SHIFT,
AST_EXPRESSION_BINARY_RIGHT_SHIFT,
AST_EXPRESSION_BINARY_AND,
AST_EXPRESSION_BINARY_OR,
AST_EXPRESSION_IF_ELSE,
AST_EXPRESSION_IMPLICIT_CAST,
AST_EXPRESSION_CALL,
AST_EXPRESSION_DOT_CALL,
AST_EXPRESSION_SUBSCRIPT,
AST_EXPRESSION_LAMBDA,
AST_EXPRESSION_TUPLE,
AST_EXPRESSION_ARRAY,
AST_EXPRESSION_FIXED_ARRAY,
AST_EXPRESSION_AS,
};
typedef uint8 Ast_Expression_Flags;
static const Ast_Expression_Flags AST_EXPRESSION_FLAG_REFERENTIAL = (1<<0);
static const Ast_Expression_Flags AST_EXPRESSION_FLAG_PURE = (1<<1);
static const Ast_Expression_Flags AST_EXPRESSION_FLAG_CONSTANTLY_EVALUATABLE = (1<<2);
static const Ast_Expression_Flags AST_EXPRESSION_FLAG_INTERNALLY_REFERENTIAL = (1<<3);
struct Ast_Expression
{
Ast_Expression_Kind kind;
Ast_Expression_Flags flags;
TypeID type;
Token* begin;
Token* end;
};
struct Ast_Expression_Implicit_Cast : Ast_Expression
{
Ast_Expression* subexpression;
};
struct Ast_Expression_Unary : Ast_Expression
{
Ast_Expression* subexpression;
Token* op;
};
struct Ast_Expression_Binary : Ast_Expression
{
Ast_Expression* left;
Ast_Expression* right;
Token* op;
};
struct Ast_Expression_Ternary : Ast_Expression
{
Ast_Expression* left;
Ast_Expression* middle;
Ast_Expression* right;
Token* ops[2];
};
struct Ast_Expression_Call : Ast_Expression
{
Ast_Expression* function;
Ast_Expression_Tuple* parameters;
};
struct Ast_Expression_Dot_Call : Ast_Expression
{
Ast_Expression_Binary* dot;
Ast_Expression_Tuple* parameters;
};
struct Ast_Expression_Array : Ast_Expression
{
Ast_Expression* left;
Ast_Expression* right;
};
struct Ast_Expression_Tuple : Ast_Expression
{
Array<Ast_Expression*> elements;
uint32 recursive_count;
};
struct Ast_Expression_Fixed_Array : Ast_Expression
{
Array<Ast_Expression*> elements;
};
struct Ast_Expression_As : Ast_Expression
{
Ast_Expression* expression;
Ast_Type ast_type;
Token* op;
};
struct Ast_Expression_Literal : Ast_Expression
{
Token* token;
union
{
bool value_bool;
int64 value_int;
float32 value_f32;
float64 value_f64;
};
};
struct Ast_Expression_Subscript : Ast_Expression
{
Ast_Expression* array;
Ast_Expression* index;
};
struct Ast_Expression_Terminal : Ast_Expression
{
Token* token;
void* ptr;
};
struct Ast_Expression_Variable : Ast_Expression
{
Token* token;
Ast_Variable* variable;
};
struct Ast_Expression_Function : Ast_Expression
{
Token* token;
Ast_Function* function;
};
struct Ast_Expression_Intrinsic : Ast_Expression
{
Token* token;
IntrinsicID intrinsic;
};
struct Ast_Expression_Struct : Ast_Expression
{
Token* token;
Ast_Struct* structure;
};
struct Ast_Expression_Enum : Ast_Expression
{
Token* token;
Ast_Enum* enumeration;
};
struct Ast_Expression_Struct_Member : Ast_Expression
{
Token* token;
Ast_Struct_Member* member;
};
struct Ast_Expression_Enum_Member : Ast_Expression
{
Token* token;
Ast_Enum_Member* member;
};
struct Ast_Scope
{
Ast_Scope* parent;
Array<Ast_Function> functions;
Array<Ast_Struct> structs;
Array<Ast_Enum> enums;
List<Ast_Variable*> variables;
};
struct Ast_Code
{
Array<Ast_Statement> statements;
List<Ast_Defer*> defers;
Ast_Scope scope;
uint64 frame_size;
bool contains_return;
bool contains_break;
bool all_paths_return;
bool all_paths_break;
bool is_inside_loop;
bool has_defer_that_returns;
};
enum Ast_Statement_Kind
{
AST_STATEMENT_EXPRESSION,
AST_STATEMENT_VARIABLE_DECLARATION,
AST_STATEMENT_ASSIGNMENT,
AST_STATEMENT_ASSIGNMENT_ADD,
AST_STATEMENT_ASSIGNMENT_SUBTRACT,
AST_STATEMENT_ASSIGNMENT_MULTIPLY,
AST_STATEMENT_ASSIGNMENT_DIVIDE,
AST_STATEMENT_ASSIGNMENT_XOR,
AST_STATEMENT_INCREMENT,
AST_STATEMENT_DECREMENT,
AST_STATEMENT_RETURN,
AST_STATEMENT_BREAK,
AST_STATEMENT_CLAIM,
AST_STATEMENT_BRANCH_BLOCK,
AST_STATEMENT_DEFER,
};
enum Ast_Branch_Clause_Kind : uint8
{
AST_BRANCH_CLAUSE_INIT = 0,
AST_BRANCH_CLAUSE_ELSE,
AST_BRANCH_CLAUSE_THEN
};
enum Ast_Branch_Kind : uint8
{
AST_BRANCH_NAKED = 0,
// if bool:
AST_BRANCH_IF,
// while bool:
AST_BRANCH_WHILE,
// for it in []T:
// for it in []T where bool:
// for it in []T, int:
// for it in []T, int where bool:
AST_BRANCH_FOR_RANGE,
// for vardecl, bool:
// for vardecl, bool, int:
AST_BRANCH_FOR_VERBOSE,
};
struct Ast_Branch_For_Range
{
Ast_Variable* iterator;
Ast_Expression* range;
Ast_Expression* filter;
};
struct Ast_Branch_For_Verbose
{
Ast_Variable* variable;
Ast_Expression* condition;
Ast_Expression* next;
};
struct Ast_Branch
{
Ast_Branch_Kind kind;
Ast_Branch_Clause_Kind clause;
Block* entry_block;
union
{
Ast_Expression* if_condition;
Ast_Expression* while_condition;
Ast_Branch_For_Range for_range;
Ast_Branch_For_Verbose for_verbose;
};
Ast_Branch* else_branch;
Ast_Branch* then_branch;
Ast_Code code;
};
struct Ast_BranchBlock
{
Array<Ast_Branch> branches;
};
struct Ast_Defer
{
Token* token;
Ast_Code code;
// Ast_Defer* next;
};
struct Ast_Return
{
Token* token;
Ast_Expression* expression;
// Ast_Defer* defer;
// @Todo: Prevent return statement if a prior defer in defer chain contains a return statement.
};
struct Ast_Break
{
Token* token;
// Ast_BranchBlock* block;
// Ast_Branch* branch;
// Ast_Defer* defer_begin;
// Ast_Defer* defer_end;
};
struct Ast_Claim
{
Token* token;
Ast_Expression* expression;
};
struct Ast_Increment // Nudge?
{
Token* token;
Ast_Expression* expression;
};
using Ast_Variable_Flags = uint8;
static const Ast_Variable_Flags AST_VARIABLE_FLAG_PARAMETER = (1<<0);
static const Ast_Variable_Flags AST_VARIABLE_FLAG_GLOBAL = (1<<1);
static const Ast_Variable_Flags AST_VARIABLE_FLAG_CONSTANT = (1<<2);
static const Ast_Variable_Flags AST_VARIABLE_FLAG_ITERATOR = (1<<3);
struct Ast_Variable
{
String name;
Token* name_token;
Ast_Variable_Flags flags;
TypeID type;
Ast_Type* ast_type;
Ast_Expression* assignment;
Value ir_stack;
uint64 offset; // @RemoveMe?
// @Todo: Add span
Ast_Variable() = default;
};
struct StackFrame
{
char* data;
Ast_Function* function;
bool do_return;
bool do_break;
};
static inline char* StackFrameGetVariable(StackFrame* frame, Ast_Variable* variable)
{
return frame->data + variable->offset;
}
struct Ast_Assignment
{
Token* token;
Ast_Expression* left;
Ast_Expression* right;
};
struct Ast_Statement
{
Ast_Statement_Kind kind;
union
{
Ast_Assignment assignment;
Ast_BranchBlock branch_block;
Ast_Defer defer;
Ast_Claim claim;
Ast_Break brk;
Ast_Return ret;
Ast_Variable variable_declaration = Ast_Variable(); // @FixMe @Optimization: Change to pointer, Ast_Variable is yuuuge!
Ast_Increment increment;
Ast_Expression* expression;
};
};
struct Ast_Function
{
String name;
Token* name_token;
Array<Ast_Variable> parameters; // @Todo: Give parameters their own struct? Ast_Parameter?
Ast_Code code;
TypeID type;
TypeID return_type;
List<Ast_Return*> returns; // @Todo: Infer return type.
Ast_Type* ast_return_type;
Procedure* procedure;
bool is_pure;
bool is_global;
};
struct Ast_Import
{
Token* token;
Token* module;
// @Todo: Finalize import syntax.
// @Todo: Allow for 'naming' with 'as' keyword.
};
struct Ast_Struct_Member
{
String name;
Token* name_token;
TypeID type;
Ast_Type ast_type;
uint64 offset;
uint32 index;
};
struct Ast_Enum_Member
{
String name;
Token* name_token;
Ast_Expression* expression;
int64 value;
uint32 index;
};
struct Ast_Struct
{
TypeID type;
String name;
Token* name_token;
Array<Ast_Struct_Member> members;
List<Ast_Struct*> closure;
};
struct Ast_Enum
{
TypeID type;
String name;
Token* name_token;
TypeID underlying_type;
Array<Ast_Enum_Member> members;
};
struct Line
{
Indent16 indent;
String string;
Token* tokens_begin;
Token* tokens_end;
};
struct Ast_Module
{
Stack stack;
Ast_Scope scope;
String code;
String file_path;
String name;
Array<Token> tokens;
Array<Line> lines;
Array<Ast_Module*> users;
Array<Ast_Import> imports;
};
static void LexerParse(Ast_Module* module);
static void InitIntrinsicFunctions(Ast_Module* module);
static Ast_Module* ParseFile(String file_path);
static void SemanticParse(Ast_Module* module);
static uint64 CalculateStackFrameSize(Ast_Function* function);
static uint64 CalculateStackFrameSize(Ast_Code* code, uint64 offset);
static void ScanExpression(Ast_Expression* expression, Ast_Scope* scope, Ast_Module* module);
static void ScanScope(Ast_Scope* scope, Ast_Module* module);
static void ScanCode(Ast_Code* code, Ast_Scope* scope, Ast_Function* function, Ast_Module* module);
static void ScanFunction(Ast_Function* function, Ast_Scope* scope, Ast_Module* module);
static void GenericWrite(OutputBuffer* buffer, Ast_Expression* expression);
static void GenericWrite(OutputBuffer* buffer, Ast_Type* type);
static void GenericWrite(OutputBuffer* buffer, Ast_Type type);
static void GenericWrite(OutputBuffer* buffer, TypeID type);