141 lines
3.6 KiB
Plaintext
141 lines
3.6 KiB
Plaintext
%{
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#include <string>
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#include <iostream>
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#include "ast.hpp"
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#include "parser.hpp"
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std::vector<definition_ptr> program;
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extern yy::parser::symbol_type yylex();
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%}
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%token PLUS
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%token TIMES
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%token MINUS
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%token DIVIDE
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%token <int> INT
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%token DEFN
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%token DATA
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%token CASE
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%token OF
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%token OCURLY
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%token CCURLY
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%token OPAREN
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%token CPAREN
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%token COMMA
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%token ARROW
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%token EQUAL
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%token <std::string> LID
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%token <std::string> UID
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%language "c++"
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%define api.value.type variant
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%define api.token.constructor
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%type <std::vector<std::string>> lowercaseParams uppercaseParams
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%type <std::vector<definition_ptr>> program definitions
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%type <std::vector<branch_ptr>> branches
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%type <std::vector<constructor_ptr>> constructors
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%type <ast_ptr> aAdd aMul case app appBase
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%type <definition_ptr> definition defn data
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%type <branch_ptr> branch
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%type <pattern_ptr> pattern
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%type <constructor_ptr> constructor
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%start program
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%%
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program
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: definitions { program = std::move($1); }
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;
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definitions
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: definitions definition { $$ = std::move($1); $$.push_back(std::move($2)); }
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| definition { $$ = std::vector<definition_ptr>(); $$.push_back(std::move($1)); }
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;
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definition
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: defn { $$ = std::move($1); }
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| data { $$ = std::move($1); }
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;
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defn
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: DEFN LID lowercaseParams EQUAL OCURLY aAdd CCURLY
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{ $$ = definition_ptr(
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new definition_defn(std::move($2), std::move($3), std::move($6))); }
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;
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lowercaseParams
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: %empty { $$ = std::vector<std::string>(); }
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| lowercaseParams LID { $$ = std::move($1); $$.push_back(std::move($2)); }
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;
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uppercaseParams
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: %empty { $$ = std::vector<std::string>(); }
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| uppercaseParams UID { $$ = std::move($1); $$.push_back(std::move($2)); }
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;
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aAdd
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: aAdd PLUS aMul { $$ = ast_ptr(new ast_binop(PLUS, std::move($1), std::move($3))); }
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| aAdd MINUS aMul { $$ = ast_ptr(new ast_binop(MINUS, std::move($1), std::move($3))); }
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| aMul { $$ = std::move($1); }
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;
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aMul
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: aMul TIMES app { $$ = ast_ptr(new ast_binop(TIMES, std::move($1), std::move($3))); }
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| aMul DIVIDE app { $$ = ast_ptr(new ast_binop(DIVIDE, std::move($1), std::move($3))); }
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| app { $$ = std::move($1); }
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;
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app
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: app appBase { $$ = ast_ptr(new ast_app(std::move($1), std::move($2))); }
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| appBase { $$ = std::move($1); }
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;
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appBase
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: INT { $$ = ast_ptr(new ast_int($1)); }
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| LID { $$ = ast_ptr(new ast_lid(std::move($1))); }
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| UID { $$ = ast_ptr(new ast_uid(std::move($1))); }
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| OPAREN aAdd CPAREN { $$ = std::move($2); }
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| case { $$ = std::move($1); }
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;
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case
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: CASE aAdd OF OCURLY branches CCURLY
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{ $$ = ast_ptr(new ast_case(std::move($2), std::move($5))); }
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;
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branches
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: branches branch { $$ = std::move($1); $$.push_back(std::move($2)); }
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| branch { $$ = std::vector<branch_ptr>(); $$.push_back(std::move($1));}
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;
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branch
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: pattern ARROW OCURLY aAdd CCURLY
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{ $$ = branch_ptr(new branch(std::move($1), std::move($4))); }
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;
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pattern
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: LID { $$ = pattern_ptr(new pattern_var(std::move($1))); }
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| UID lowercaseParams
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{ $$ = pattern_ptr(new pattern_constr(std::move($1), std::move($2))); }
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;
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data
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: DATA UID EQUAL OCURLY constructors CCURLY
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{ $$ = definition_ptr(new definition_data(std::move($2), std::move($5))); }
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;
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constructors
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: constructors COMMA constructor { $$ = std::move($1); $$.push_back(std::move($3)); }
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| constructor
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{ $$ = std::vector<constructor_ptr>(); $$.push_back(std::move($1)); }
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;
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constructor
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: UID uppercaseParams
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{ $$ = constructor_ptr(new constructor(std::move($1), std::move($2))); }
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;
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