/**

 * MojoShader; generate shader programs from bytecode of compiled

 *  Direct3D shaders.

 *

 * Please see the file LICENSE.txt in the source's root directory.

 *

 *  This file written by Ryan C. Gordon.

 */

// This is a Lemon Parser grammar for HLSL. It is based on an ANSI C YACC

//  grammar by Jeff Lee: http://www.lysator.liu.se/c/ANSI-C-grammar-y.html

// Lemon is here: http://www.hwaci.com/sw/lemon/  ...  the source is included

//  with MojoShader, and built with the library, so you don't have to track

//  down the dependency.

// HLSL syntax is described, informally, here:

//  http://msdn.microsoft.com/en-us/library/bb509615(VS.85).aspx

%name ParseHLSL

// Some shift-reduce conflicts are basically unavoidable, but if the final

//  conflict count matches this value, we consider it known and acceptable.

%expect 2

%start_symbol shader

%token_prefix TOKEN_HLSL_

%token_type { TokenData }

%extra_argument { Context *ctx }

%include {

#ifndef __MOJOSHADER_HLSL_COMPILER__

#error Do not compile this file directly.

#endif

}

%syntax_error {

    // !!! FIXME: make this a proper fail() function.

    fail(ctx, "Syntax error");

}

%parse_failure {

    // !!! FIXME: make this a proper fail() function.

    fail(ctx, "Giving up. Parser is hopelessly lost...");

}

%stack_overflow {

    // !!! FIXME: make this a proper fail() function.

    fail(ctx, "Giving up. Parser stack overflow");

}

// operator precedence (matches C spec)...

%left COMMA.

%right ASSIGN ADDASSIGN SUBASSIGN MULASSIGN DIVASSIGN MODASSIGN LSHIFTASSIGN

       RSHIFTASSIGN ANDASSIGN ORASSIGN XORASSIGN.

%right QUESTION.

%left OROR.

%left ANDAND.

%left OR.

%left XOR.

%left AND.

%left EQL NEQ.

%left LT LEQ GT GEQ.

%left LSHIFT RSHIFT.

%left PLUS MINUS.

%left STAR SLASH PERCENT.

%right TYPECAST EXCLAMATION COMPLEMENT MINUSMINUS PLUSPLUS.

%left DOT LBRACKET RBRACKET LPAREN RPAREN.

// bump up the precedence of ELSE, to avoid shift/reduce conflict on the

//  usual "dangling else ambiguity" ...

%right ELSE.

// The rules...

shader ::= compilation_units(B). { assert(ctx->ast == NULL); REVERSE_LINKED_LIST(MOJOSHADER_astCompilationUnit, B); ctx->ast = (MOJOSHADER_astNode *) B; }

%type compilation_units { MOJOSHADER_astCompilationUnit * }

%destructor compilation_units { delete_compilation_unit(ctx, $$); }

compilation_units(A) ::= compilation_unit(B). { A = B; }

compilation_units(A) ::= compilation_units(B) compilation_unit(C). { if (C) { C->next = B; A = C; } }

%type compilation_unit { MOJOSHADER_astCompilationUnit * }

%destructor compilation_unit { delete_compilation_unit(ctx, $$); }

//compilation_unit(A) ::= PRAGMA . { A = NULL; }   // !!! FIXME: deal with pragmas.

compilation_unit(A) ::= variable_declaration(B). { A = new_global_variable(ctx, B); }

compilation_unit(A) ::= function_signature(B) SEMICOLON. { A = new_function(ctx, B, NULL); }

compilation_unit(A) ::= function_signature(B) statement_block(C). { A = new_function(ctx, B, C); }

compilation_unit(A) ::= typedef(B). { A = new_global_typedef(ctx, B); }

compilation_unit(A) ::= struct_declaration(B) SEMICOLON. { A = new_global_struct(ctx, B); }

//compilation_unit(A) ::= error SEMICOLON. { A = NULL; }  // !!! FIXME: research using the error nonterminal

%type typedef { MOJOSHADER_astTypedef * }

%destructor typedef { delete_typedef(ctx, $$); }

// !!! FIXME: should CONST be here, or in datatype?

typedef(A) ::= TYPEDEF CONST datatype(B) scalar_or_array(C). { A = new_typedef(ctx, 1, B, C); push_usertype(ctx, C->identifier, A->datatype); }

typedef(A) ::= TYPEDEF datatype(B) scalar_or_array(C). { A = new_typedef(ctx, 0, B, C); push_usertype(ctx, C->identifier, A->datatype); }

%type function_signature { MOJOSHADER_astFunctionSignature * }

%destructor function_signature { delete_function_signature(ctx, $$); }

function_signature(A) ::= function_storageclass(B) function_details(C) semantic(D). { A = C; A->storage_class = B; A->semantic = D; }

function_signature(A) ::= function_storageclass(B) function_details(C). { A = C; A->storage_class = B; }

function_signature(A) ::= function_details(B) semantic(C). { A = B; A->semantic = C; }

function_signature(A) ::= function_details(B). { A = B; }

%type function_details { MOJOSHADER_astFunctionSignature * }

%destructor function_details { delete_function_signature(ctx, $$); }

function_details(A) ::= datatype(B) IDENTIFIER(C) LPAREN function_parameters(D) RPAREN. { A = new_function_signature(ctx, B, C.string, D); }

function_details(A) ::= VOID IDENTIFIER(B) LPAREN function_parameters(C) RPAREN. { A = new_function_signature(ctx, NULL, B.string, C); }

// !!! FIXME: there is a "target" storage class that is the name of the

// !!! FIXME:  platform that this function is meant for...but I don't know

// !!! FIXME:  what tokens are valid here.

// !!! FIXME: Also, the docs say "one of" inline or target, but I bet you can

// !!! FIXME:  specify both.

%type function_storageclass { MOJOSHADER_astFunctionStorageClass }

//function_storageclass(A) ::= target(B). { A = B; }

function_storageclass(A) ::= INLINE. { A = MOJOSHADER_AST_FNSTORECLS_INLINE; }

%type function_parameters { MOJOSHADER_astFunctionParameters * }

%destructor function_parameters { delete_function_params(ctx, $$); }

function_parameters(A) ::= VOID. { A = NULL; }

function_parameters(A) ::= function_parameter_list(B). { REVERSE_LINKED_LIST(MOJOSHADER_astFunctionParameters, B); A = B; }

function_parameters(A) ::= . { A = NULL; }

%type function_parameter_list { MOJOSHADER_astFunctionParameters * }

%destructor function_parameter_list { delete_function_params(ctx, $$); }

function_parameter_list(A) ::= function_parameter(B). { A = B; }

function_parameter_list(A) ::= function_parameter_list(B) COMMA function_parameter(C). { C->next = B; A = C; }

// !!! FIXME: this is pretty unreadable.

// !!! FIXME: CONST?

%type function_parameter { MOJOSHADER_astFunctionParameters * }

%destructor function_parameter { delete_function_params(ctx, $$); }

function_parameter(A) ::= input_modifier(B) datatype(C) IDENTIFIER(D) semantic(E) interpolation_mod(F) initializer(G). { A = new_function_param(ctx, B, C, D.string, E, F, G); }

function_parameter(A) ::= input_modifier(B) datatype(C) IDENTIFIER(D) semantic(E) interpolation_mod(F). { A = new_function_param(ctx, B, C, D.string, E, F, NULL); }

function_parameter(A) ::= input_modifier(B) datatype(C) IDENTIFIER(D) semantic(E) initializer(F). { A = new_function_param(ctx, B, C, D.string, E, MOJOSHADER_AST_INTERPMOD_NONE, F); }

function_parameter(A) ::= input_modifier(B) datatype(C) IDENTIFIER(D) semantic(E). { A = new_function_param(ctx, B, C, D.string, E, MOJOSHADER_AST_INTERPMOD_NONE, NULL); }

function_parameter(A) ::= input_modifier(B) datatype(C) IDENTIFIER(D) interpolation_mod(E) initializer(F). { A = new_function_param(ctx, B, C, D.string, NULL, E, F); }

function_parameter(A) ::= input_modifier(B) datatype(C) IDENTIFIER(D) interpolation_mod(E). { A = new_function_param(ctx, B, C, D.string, NULL, E, NULL); }

function_parameter(A) ::= input_modifier(B) datatype(C) IDENTIFIER(D) initializer(E). { A = new_function_param(ctx, B, C, D.string, NULL, MOJOSHADER_AST_INTERPMOD_NONE, E); }

function_parameter(A) ::= input_modifier(B) datatype(C) IDENTIFIER(D). { A = new_function_param(ctx, B, C, D.string, NULL, MOJOSHADER_AST_INTERPMOD_NONE, NULL); }

function_parameter(A) ::= datatype(B) IDENTIFIER(C) semantic(D) interpolation_mod(E) initializer(F). { A = new_function_param(ctx, MOJOSHADER_AST_INPUTMOD_NONE, B, C.string, D, E, F); }

function_parameter(A) ::= datatype(B) IDENTIFIER(C) semantic(D) interpolation_mod(E). { A = new_function_param(ctx, MOJOSHADER_AST_INPUTMOD_NONE, B, C.string, D, E, NULL); }

function_parameter(A) ::= datatype(B) IDENTIFIER(C) semantic(D) initializer(E). { A = new_function_param(ctx, MOJOSHADER_AST_INPUTMOD_NONE, B, C.string, D, MOJOSHADER_AST_INTERPMOD_NONE, E); }

function_parameter(A) ::= datatype(B) IDENTIFIER(C) semantic(D). { A = new_function_param(ctx, MOJOSHADER_AST_INPUTMOD_NONE, B, C.string, D, MOJOSHADER_AST_INTERPMOD_NONE, NULL); }

function_parameter(A) ::= datatype(B) IDENTIFIER(C) interpolation_mod(D) initializer(E). { A = new_function_param(ctx, MOJOSHADER_AST_INPUTMOD_NONE, B, C.string, NULL, D, E); }

function_parameter(A) ::= datatype(B) IDENTIFIER(C) interpolation_mod(D). { A = new_function_param(ctx, MOJOSHADER_AST_INPUTMOD_NONE, B, C.string, NULL, D, NULL); }

function_parameter(A) ::= datatype(B) IDENTIFIER(C) initializer(D). { A = new_function_param(ctx, MOJOSHADER_AST_INPUTMOD_NONE, B, C.string, NULL, MOJOSHADER_AST_INTERPMOD_NONE, D); }

function_parameter(A) ::= datatype(B) IDENTIFIER(C). { A = new_function_param(ctx, MOJOSHADER_AST_INPUTMOD_NONE, B, C.string, NULL, MOJOSHADER_AST_INTERPMOD_NONE, NULL); }

%type input_modifier { MOJOSHADER_astInputModifier }

input_modifier(A) ::= IN. { A = MOJOSHADER_AST_INPUTMOD_IN; }

input_modifier(A) ::= INOUT. { A = MOJOSHADER_AST_INPUTMOD_INOUT; }

input_modifier(A) ::= OUT. { A = MOJOSHADER_AST_INPUTMOD_OUT; }

input_modifier(A) ::= IN OUT. { A = MOJOSHADER_AST_INPUTMOD_INOUT; }

input_modifier(A) ::= OUT IN. { A = MOJOSHADER_AST_INPUTMOD_INOUT; }

input_modifier(A) ::= UNIFORM. { A = MOJOSHADER_AST_INPUTMOD_UNIFORM; }

%type semantic { const char * }

semantic(A) ::= COLON IDENTIFIER(B). { A = B.string; }

// DX10 only?

%type interpolation_mod { MOJOSHADER_astInterpolationModifier }

interpolation_mod(A) ::= LINEAR. { A = MOJOSHADER_AST_INTERPMOD_LINEAR; }

interpolation_mod(A) ::= CENTROID. { A = MOJOSHADER_AST_INTERPMOD_CENTROID; }

interpolation_mod(A) ::= NOINTERPOLATION. { A = MOJOSHADER_AST_INTERPMOD_NOINTERPOLATION; }

interpolation_mod(A) ::= NOPERSPECTIVE. { A = MOJOSHADER_AST_INTERPMOD_NOPERSPECTIVE; }

interpolation_mod(A) ::= SAMPLE. { A = MOJOSHADER_AST_INTERPMOD_SAMPLE; }

%type variable_declaration { MOJOSHADER_astVariableDeclaration * }

%destructor variable_declaration { delete_variable_declaration(ctx, $$); }

variable_declaration(A) ::= variable_attribute_list(B) datatype(C) variable_declaration_details_list(D) SEMICOLON. { REVERSE_LINKED_LIST(MOJOSHADER_astVariableDeclaration, D); A = D; A->attributes = B; A->datatype = C; }

variable_declaration(A) ::= datatype(B) variable_declaration_details_list(C) SEMICOLON. { REVERSE_LINKED_LIST(MOJOSHADER_astVariableDeclaration, C); A = C; A->datatype = B; }

// !!! FIXME: this expects "struct Identifier {} varname" ... that "Identifier" is wrong.

variable_declaration(A) ::= struct_declaration(B) variable_declaration_details_list(C) SEMICOLON. { REVERSE_LINKED_LIST(MOJOSHADER_astVariableDeclaration, C); A = C; A->anonymous_datatype = B; }

%type variable_attribute_list { int }

variable_attribute_list(A) ::= variable_attribute(B). { A = B; }

variable_attribute_list(A) ::= variable_attribute_list(B) variable_attribute(C). { A = B | C; }

%type variable_attribute { int }

variable_attribute(A) ::= EXTERN. { A = MOJOSHADER_AST_VARATTR_EXTERN; }

variable_attribute(A) ::= NOINTERPOLATION. { A = MOJOSHADER_AST_VARATTR_NOINTERPOLATION; }

variable_attribute(A) ::= SHARED. { A = MOJOSHADER_AST_VARATTR_SHARED; }

variable_attribute(A) ::= STATIC. { A = MOJOSHADER_AST_VARATTR_STATIC; }

variable_attribute(A) ::= UNIFORM. { A = MOJOSHADER_AST_VARATTR_UNIFORM; }

variable_attribute(A) ::= VOLATILE. { A = MOJOSHADER_AST_VARATTR_VOLATILE; }

variable_attribute(A) ::= CONST. { A = MOJOSHADER_AST_VARATTR_CONST; }

variable_attribute(A) ::= ROWMAJOR. { A = MOJOSHADER_AST_VARATTR_ROWMAJOR; }

variable_attribute(A) ::= COLUMNMAJOR. { A = MOJOSHADER_AST_VARATTR_COLUMNMAJOR; }

%type variable_declaration_details_list { MOJOSHADER_astVariableDeclaration * }

%destructor variable_declaration_details_list { delete_variable_declaration(ctx, $$); }

variable_declaration_details_list(A) ::= variable_declaration_details(B). { A = B; }

variable_declaration_details_list(A) ::= variable_declaration_details_list(B) COMMA variable_declaration_details(C). { A = C; A->next = B; }

%type variable_declaration_details { MOJOSHADER_astVariableDeclaration * }

%destructor variable_declaration_details { delete_variable_declaration(ctx, $$); }

variable_declaration_details(A) ::= scalar_or_array(B) semantic(C) annotations(D) initializer(E) variable_lowlevel(F). { A = new_variable_declaration(ctx, B, C, D, E, F); }

variable_declaration_details(A) ::= scalar_or_array(B) semantic(C) annotations(D) initializer(E). { A = new_variable_declaration(ctx, B, C, D, E, NULL); }

variable_declaration_details(A) ::= scalar_or_array(B) semantic(C) annotations(D) variable_lowlevel(E). { A = new_variable_declaration(ctx, B, C, D, NULL, E); }

variable_declaration_details(A) ::= scalar_or_array(B) semantic(C) annotations(D). { A = new_variable_declaration(ctx, B, C, D, NULL, NULL); }

variable_declaration_details(A) ::= scalar_or_array(B) semantic(C) initializer(D) variable_lowlevel(E). { A = new_variable_declaration(ctx, B, C, NULL, D, E); }

variable_declaration_details(A) ::= scalar_or_array(B) semantic(C) initializer(D). { A = new_variable_declaration(ctx, B, C, NULL, D, NULL); }

variable_declaration_details(A) ::= scalar_or_array(B) semantic(C) variable_lowlevel(D). { A = new_variable_declaration(ctx, B, C, NULL, NULL, D); }

variable_declaration_details(A) ::= scalar_or_array(B) semantic(C). { A = new_variable_declaration(ctx, B, C, NULL, NULL, NULL); }

variable_declaration_details(A) ::= scalar_or_array(B) annotations(C) initializer(D) variable_lowlevel(E). { A = new_variable_declaration(ctx, B, NULL, C, D, E); }

variable_declaration_details(A) ::= scalar_or_array(B) annotations(C) initializer(D). { A = new_variable_declaration(ctx, B, NULL, C, D, NULL); }

variable_declaration_details(A) ::= scalar_or_array(B) annotations(C) variable_lowlevel(D). { A = new_variable_declaration(ctx, B, NULL, C, NULL, D); }

variable_declaration_details(A) ::= scalar_or_array(B) annotations(C). { A = new_variable_declaration(ctx, B, NULL, C, NULL, NULL); }

variable_declaration_details(A) ::= scalar_or_array(B) initializer(C) variable_lowlevel(D). { A = new_variable_declaration(ctx, B, NULL, NULL, C, D); }

variable_declaration_details(A) ::= scalar_or_array(B) initializer(C). { A = new_variable_declaration(ctx, B, NULL, NULL, C, NULL); }

variable_declaration_details(A) ::= scalar_or_array(B) variable_lowlevel(C). { A = new_variable_declaration(ctx, B, NULL, NULL, NULL, C); }

variable_declaration_details(A) ::= scalar_or_array(B). { A = new_variable_declaration(ctx, B, NULL, NULL, NULL, NULL); }

// !!! FIXME: we don't handle full sampler declarations at the moment.

%type struct_declaration { MOJOSHADER_astStructDeclaration * }

%destructor struct_declaration { delete_struct_declaration(ctx, $$); }

struct_declaration(A) ::= struct_intro(B) LBRACE struct_member_list(C) RBRACE. { REVERSE_LINKED_LIST(MOJOSHADER_astStructMembers, C); A = new_struct_declaration(ctx, B, C); }

// This has to be separate from struct_declaration so that the struct is in the usertypemap when parsing its members.

%type struct_intro { const char * }

struct_intro(A) ::= STRUCT IDENTIFIER(B). { A = B.string; push_usertype(ctx, A, &ctx->dt_none); }  // datatype is bogus until semantic analysis.

%type struct_member_list { MOJOSHADER_astStructMembers * }

%destructor struct_member_list { delete_struct_member(ctx, $$); }

struct_member_list(A) ::= struct_member(B). { A = B; }

struct_member_list(A) ::= struct_member_list(B) struct_member(C). { A = C; MOJOSHADER_astStructMembers *i = A; while (i->next) { i = i->next; } i->next = B; }

%type struct_member { MOJOSHADER_astStructMembers * }

%destructor struct_member { delete_struct_member(ctx, $$); }

struct_member(A) ::= interpolation_mod(B) struct_member_details(C). { MOJOSHADER_astStructMembers *i = C; A = C; while (i) { i->interpolation_mod = B; i = i->next; } }

struct_member(A) ::= struct_member_details(B). { A = B; }

%type struct_member_details { MOJOSHADER_astStructMembers * }

%destructor struct_member_details { delete_struct_member(ctx, $$); }

struct_member_details(A) ::= datatype(B) struct_member_item_list(C) SEMICOLON. { MOJOSHADER_astStructMembers *i = C; A = C; while (i) { i->datatype = B; i = i->next; } }

%type struct_member_item_list { MOJOSHADER_astStructMembers * }

%destructor struct_member_item_list { delete_struct_member(ctx, $$); }

struct_member_item_list(A) ::= scalar_or_array(B). { A = new_struct_member(ctx, B, NULL); }

struct_member_item_list(A) ::= scalar_or_array(B) semantic(C). { A = new_struct_member(ctx, B, C); }

struct_member_item_list(A) ::= struct_member_item_list(B) COMMA IDENTIFIER(C). { A = new_struct_member(ctx, new_scalar_or_array(ctx, C.string, 0, NULL), NULL); A->next = B; A->semantic = B->semantic; }

%type variable_lowlevel { MOJOSHADER_astVariableLowLevel * }

%destructor variable_lowlevel { delete_variable_lowlevel(ctx, $$); }

variable_lowlevel(A) ::= packoffset(B) register(C). { A = new_variable_lowlevel(ctx, B, C); }

variable_lowlevel(A) ::= register(B) packoffset(C). { A = new_variable_lowlevel(ctx, C, B); }

variable_lowlevel(A) ::= packoffset(B). { A = new_variable_lowlevel(ctx, B, NULL); }

variable_lowlevel(A) ::= register(B). { A = new_variable_lowlevel(ctx, NULL, B); }

// !!! FIXME: I sort of hate this type name.

%type scalar_or_array { MOJOSHADER_astScalarOrArray * }

%destructor scalar_or_array { delete_scalar_or_array(ctx, $$); }

scalar_or_array(A) ::= IDENTIFIER(B) LBRACKET RBRACKET. { A = new_scalar_or_array(ctx, B.string, 1, NULL); }

scalar_or_array(A) ::= IDENTIFIER(B) LBRACKET expression(C) RBRACKET. { A = new_scalar_or_array(ctx, B.string, 1, C); }

scalar_or_array(A) ::= IDENTIFIER(B). { A = new_scalar_or_array(ctx, B.string, 0, NULL); }

%type packoffset { MOJOSHADER_astPackOffset * }

%destructor packoffset { delete_pack_offset(ctx, $$); }

packoffset(A) ::= COLON PACKOFFSET LPAREN IDENTIFIER(B) DOT IDENTIFIER(C) RPAREN. { A = new_pack_offset(ctx, B.string, C.string); }

packoffset(A) ::= COLON PACKOFFSET LPAREN IDENTIFIER(B) RPAREN. { A = new_pack_offset(ctx, B.string, NULL); }

// !!! FIXME: can take a profile, like ": register(ps_5_0, s)"

// !!! FIXME: IDENTIFIER is wrong: "s[2]" works, apparently. Use scalar_or_array instead?

// !!! FIXME: (these might be SM4 features)

%type register { const char * }

register(A) ::= COLON REGISTER LPAREN IDENTIFIER(B) RPAREN. { A = B.string; }

%type annotations { MOJOSHADER_astAnnotations * }

%destructor annotations { delete_annotation(ctx, $$); }

annotations(A) ::= LT annotation_list(B) GT. { REVERSE_LINKED_LIST(MOJOSHADER_astAnnotations, B); A = B; }

%type annotation_list { MOJOSHADER_astAnnotations * }

%destructor annotation_list { delete_annotation(ctx, $$); }

annotation_list(A) ::= annotation(B). { A = B; }

annotation_list(A) ::= annotation_list(B) annotation(C). { A = C; A->next = B; }

// !!! FIXME: can this take a USERTYPE if we typedef'd a scalar type?

%type annotation { MOJOSHADER_astAnnotations * }

%destructor annotation { delete_annotation(ctx, $$); }

annotation(A) ::= datatype_scalar(B) initializer(C) SEMICOLON. { A = new_annotation(ctx, B, C); }

%type initializer_block_list { MOJOSHADER_astExpression * }

%destructor initializer_block_list { delete_expr(ctx, $$); }

initializer_block_list(A) ::= expression(B). { A = B; }

initializer_block_list(A) ::= LBRACE initializer_block_list(B) RBRACE. { A = B; }

initializer_block_list(A) ::= initializer_block_list(B) COMMA initializer_block_list(C). { A = new_binary_expr(ctx, MOJOSHADER_AST_OP_COMMA, B, C); }

%type initializer_block { MOJOSHADER_astExpression * }

%destructor initializer_block { delete_expr(ctx, $$); }

initializer_block(A) ::= LBRACE initializer_block_list(B) RBRACE. { A = B; }

%type initializer { MOJOSHADER_astExpression * }

%destructor initializer { delete_expr(ctx, $$); }

initializer(A) ::= ASSIGN initializer_block(B). { A = B; }

initializer(A) ::= ASSIGN expression(B). { A = B; }

%type intrinsic_datatype { const MOJOSHADER_astDataType * }

intrinsic_datatype(A) ::= datatype_vector(B). { A = B; }

intrinsic_datatype(A) ::= datatype_matrix(B). { A = B; }

intrinsic_datatype(A) ::= datatype_scalar(B). { A = B; }

intrinsic_datatype(A) ::= datatype_sampler(B). { A = B; }

intrinsic_datatype(A) ::= datatype_buffer(B). { A = B; }

%type datatype { const MOJOSHADER_astDataType * }

datatype(A) ::= intrinsic_datatype(B). { A = B; }

datatype(A) ::= USERTYPE(B). { A = B.datatype; }

%type datatype_sampler { const MOJOSHADER_astDataType * }

datatype_sampler(A) ::= SAMPLER. { A = &ctx->dt_sampler2d; }

datatype_sampler(A) ::= SAMPLER1D. { A = &ctx->dt_sampler1d; }

datatype_sampler(A) ::= SAMPLER2D. { A = &ctx->dt_sampler2d; }

datatype_sampler(A) ::= SAMPLER3D. { A = &ctx->dt_sampler3d; }

datatype_sampler(A) ::= SAMPLERCUBE. { A = &ctx->dt_samplercube; }

datatype_sampler(A) ::= SAMPLER_STATE. { A = &ctx->dt_samplerstate; }

datatype_sampler(A) ::= SAMPLERSTATE. { A = &ctx->dt_samplerstate; }

datatype_sampler(A) ::= SAMPLERCOMPARISONSTATE. { A = &ctx->dt_samplercompstate; }

%type datatype_scalar { const MOJOSHADER_astDataType * }

datatype_scalar(A) ::= BOOL. { A = &ctx->dt_bool; }

datatype_scalar(A) ::= INT. { A = &ctx->dt_int; }

datatype_scalar(A) ::= UINT. { A = &ctx->dt_uint; }

datatype_scalar(A) ::= HALF. { A = &ctx->dt_half; }

datatype_scalar(A) ::= FLOAT. { A = &ctx->dt_float; }

datatype_scalar(A) ::= DOUBLE. { A = &ctx->dt_double; }

datatype_scalar(A) ::= STRING. { A = &ctx->dt_string; } // this is for the effects framework, not HLSL.

datatype_scalar(A) ::= SNORM FLOAT. { A = &ctx->dt_float_snorm; }

datatype_scalar(A) ::= UNORM FLOAT. { A = &ctx->dt_float_unorm; }

%type datatype_buffer { const MOJOSHADER_astDataType * }

datatype_buffer(A) ::= BUFFER LT BOOL GT. { A = &ctx->dt_buf_bool; }

datatype_buffer(A) ::= BUFFER LT INT GT. { A = &ctx->dt_buf_int; }

datatype_buffer(A) ::= BUFFER LT UINT GT. { A = &ctx->dt_buf_uint; }

datatype_buffer(A) ::= BUFFER LT HALF GT. { A = &ctx->dt_buf_half; }

datatype_buffer(A) ::= BUFFER LT FLOAT GT. { A = &ctx->dt_buf_float; }

datatype_buffer(A) ::= BUFFER LT DOUBLE GT. { A = &ctx->dt_buf_double; }

datatype_buffer(A) ::= BUFFER LT SNORM FLOAT GT. { A = &ctx->dt_buf_float_snorm; }

datatype_buffer(A) ::= BUFFER LT UNORM FLOAT GT. { A = &ctx->dt_buf_float_unorm; }

%type datatype_vector { const MOJOSHADER_astDataType * }

datatype_vector(A) ::= VECTOR LT datatype_scalar(B) COMMA INT_CONSTANT(C) GT. { A = new_datatype_vector(ctx, B, (int) C.i64); }

%type datatype_matrix { const MOJOSHADER_astDataType * }

datatype_matrix(A) ::= MATRIX LT datatype_scalar(B) COMMA INT_CONSTANT(C) COMMA INT_CONSTANT(D) GT. { A = new_datatype_matrix(ctx, B, (int) C.i64, (int) D.i64); }

%type statement_block { MOJOSHADER_astStatement * }

%destructor statement_block { delete_statement(ctx, $$); }

statement_block(A) ::= LBRACE RBRACE. { A = new_block_statement(ctx, NULL); }

statement_block(A) ::= LBRACE statement_list(B) RBRACE. { REVERSE_LINKED_LIST(MOJOSHADER_astStatement, B); A = new_block_statement(ctx, B); }

%type statement_list { MOJOSHADER_astStatement * }

%destructor statement_list { delete_statement(ctx, $$); }

statement_list(A) ::= statement(B). { A = B; }

statement_list(A) ::= statement_list(B) statement(C). { A = C; A->next = B; }

// These are for Shader Model 4 and Xbox 360 only, apparently.

// !!! FIXME: ...so we ignore them for now.

// !!! FIXME: can these stack?  "[isolate][unused]{}" or something?

%type statement_attribute { int }

statement_attribute(A) ::= ISOLATE. { A = 0; }  // !!! FIXME

statement_attribute(A) ::= MAXINSTRUCTIONCOUNT LPAREN INT_CONSTANT RPAREN. { A = 0; }  // !!! FIXME

statement_attribute(A) ::= NOEXPRESSIONOPTIMIZATIONS. { A = 0; }  // !!! FIXME

statement_attribute(A) ::= REMOVEUNUSEDINPUTS. { A = 0; }  // !!! FIXME

statement_attribute(A) ::= UNUSED. { A = 0; }  // !!! FIXME

statement_attribute(A) ::= XPS. { A = 0; }  // !!! FIXME

%type statement { MOJOSHADER_astStatement * }

%destructor statement { delete_statement(ctx, $$); }

statement(A) ::= BREAK SEMICOLON. { A = new_break_statement(ctx); }

statement(A) ::= CONTINUE SEMICOLON. { A = new_continue_statement(ctx); }

statement(A) ::= DISCARD SEMICOLON. { A = new_discard_statement(ctx); }

statement(A) ::= LBRACKET statement_attribute(B) RBRACKET statement_block(C). { A = C; /* !!! FIXME: A->attributes = B;*/ B = 0; }

statement(A) ::= variable_declaration(B). { A = new_vardecl_statement(ctx, B); }

statement(A) ::= struct_declaration(B) SEMICOLON. { A = new_struct_statement(ctx, B); }

statement(A) ::= do_intro(B) DO statement(C) WHILE LPAREN expression(D) RPAREN SEMICOLON. { A = new_do_statement(ctx, B, C, D); }

statement(A) ::= while_intro(B) LPAREN expression(C) RPAREN statement(D). { A = new_while_statement(ctx, B, C, D); }

statement(A) ::= if_intro(B) LPAREN expression(C) RPAREN statement(D). { A = new_if_statement(ctx, B, C, D, NULL); }

statement(A) ::= if_intro(B) LPAREN expression(C) RPAREN statement(D) ELSE statement(E). { A = new_if_statement(ctx, B, C, D, E); }

statement(A) ::= switch_intro(B) LPAREN expression(C) RPAREN LBRACE switch_case_list(D) RBRACE. { REVERSE_LINKED_LIST(MOJOSHADER_astSwitchCases, D); A = new_switch_statement(ctx, B, C, D); }

statement(A) ::= typedef(B). { A = new_typedef_statement(ctx, B); }

statement(A) ::= SEMICOLON. { A = new_empty_statement(ctx); }

statement(A) ::= expression(B) SEMICOLON. { A = new_expr_statement(ctx, B); }

statement(A) ::= RETURN SEMICOLON. { A = new_return_statement(ctx, NULL); }

statement(A) ::= RETURN expression(B) SEMICOLON. { A = new_return_statement(ctx, B); }

statement(A) ::= statement_block(B). { A = B; }

statement(A) ::= for_statement(B). { A = B; }

//statement(A) ::= error SEMICOLON. { A = NULL; }  // !!! FIXME: research using the error nonterminal

%type while_intro { int }

while_intro(A) ::= LBRACKET UNROLL LPAREN INT_CONSTANT(B) RPAREN RBRACKET WHILE. { A = (B.i64 < 0) ? 0 : B.i64; }

while_intro(A) ::= LBRACKET UNROLL RBRACKET WHILE. { A = -1; }

while_intro(A) ::= LBRACKET LOOP RBRACKET WHILE. { A = 0; }

while_intro(A) ::= WHILE. { A = -2; }

%type for_statement { MOJOSHADER_astStatement * }

%destructor for_statement { delete_statement(ctx, $$); }

for_statement(A) ::= for_intro(B) for_details(C). { A = C; ((MOJOSHADER_astForStatement *) A)->unroll = B; }

%type for_intro { int }

for_intro(A) ::= LBRACKET UNROLL LPAREN INT_CONSTANT(B) RPAREN RBRACKET FOR. { A = (B.i64 < 0) ? 0 : B.i64; }

for_intro(A) ::= LBRACKET UNROLL RBRACKET FOR. { A = -1; }

for_intro(A) ::= LBRACKET LOOP RBRACKET FOR. { A = 0; }

for_intro(A) ::= FOR. { A = -2; }

%type for_details { MOJOSHADER_astStatement * }

%destructor for_details { delete_statement(ctx, $$); }

for_details(A) ::= LPAREN expression(B) SEMICOLON expression(C) SEMICOLON expression(D) RPAREN statement(E). { A = new_for_statement(ctx, NULL, B, C, D, E); }

for_details(A) ::= LPAREN SEMICOLON SEMICOLON RPAREN statement(B). { A = new_for_statement(ctx, NULL, NULL, NULL, NULL, B); }

for_details(A) ::= LPAREN SEMICOLON SEMICOLON expression(B) RPAREN statement(C). { A = new_for_statement(ctx, NULL, NULL, NULL, B, C); }

for_details(A) ::= LPAREN SEMICOLON expression(B) SEMICOLON RPAREN statement(C). { A = new_for_statement(ctx, NULL, NULL, B, NULL, C); }

for_details(A) ::= LPAREN SEMICOLON expression(B) SEMICOLON expression(C) RPAREN statement(D). { A = new_for_statement(ctx, NULL, NULL, B, C, D); }

for_details(A) ::= LPAREN expression(B) SEMICOLON SEMICOLON RPAREN statement(C). { A = new_for_statement(ctx, NULL, B, NULL, NULL, C); }

for_details(A) ::= LPAREN expression(B) SEMICOLON SEMICOLON expression(C) RPAREN statement(D). { A = new_for_statement(ctx, NULL, B, NULL, C, D); }

for_details(A) ::= LPAREN expression(B) SEMICOLON expression(C) SEMICOLON RPAREN statement(D). { A = new_for_statement(ctx, NULL, B, C, NULL, D); }

for_details(A) ::= LPAREN variable_declaration(B) expression(C) SEMICOLON expression(D) RPAREN statement(E). { A = new_for_statement(ctx, B, NULL, C, D, E); }

for_details(A) ::= LPAREN variable_declaration(B) SEMICOLON RPAREN statement(C).  { A = new_for_statement(ctx, B, NULL, NULL, NULL, C); }

for_details(A) ::= LPAREN variable_declaration(B) SEMICOLON expression(C) RPAREN statement(D). { A = new_for_statement(ctx, B, NULL, C, NULL, D); }

for_details(A) ::= LPAREN variable_declaration(B) expression(C) SEMICOLON RPAREN statement(D). { A = new_for_statement(ctx, B, NULL, C, NULL, D); }

%type do_intro { int }

do_intro(A) ::= LBRACKET UNROLL LPAREN INT_CONSTANT(B) RPAREN RBRACKET DO. { A = (B.i64 < 0) ? 0 : (int) B.i64; }

do_intro(A) ::= LBRACKET UNROLL RBRACKET DO. { A = -1; }

do_intro(A) ::= LBRACKET LOOP RBRACKET DO. { A = 0; }

do_intro(A) ::= DO. { A = -2; }

%type if_intro { int }

if_intro(A) ::= LBRACKET BRANCH RBRACKET IF. { A = MOJOSHADER_AST_IFATTR_BRANCH; }

if_intro(A) ::= LBRACKET FLATTEN RBRACKET IF. { A = MOJOSHADER_AST_IFATTR_FLATTEN; }

if_intro(A) ::= LBRACKET IFALL RBRACKET IF. { A = MOJOSHADER_AST_IFATTR_IFALL; }

if_intro(A) ::= LBRACKET IFANY RBRACKET IF. { A = MOJOSHADER_AST_IFATTR_IFANY; }

if_intro(A) ::= LBRACKET PREDICATE RBRACKET IF. { A = MOJOSHADER_AST_IFATTR_PREDICATE; }

if_intro(A) ::= LBRACKET PREDICATEBLOCK RBRACKET IF. { A = MOJOSHADER_AST_IFATTR_PREDICATEBLOCK; }

if_intro(A) ::= IF. { A = MOJOSHADER_AST_IFATTR_NONE; }

%type switch_intro { int }

switch_intro(A) ::= LBRACKET FLATTEN RBRACKET SWITCH. { A = MOJOSHADER_AST_SWITCHATTR_FLATTEN; }

switch_intro(A) ::= LBRACKET BRANCH RBRACKET SWITCH. { A = MOJOSHADER_AST_SWITCHATTR_BRANCH; }

switch_intro(A) ::= LBRACKET FORCECASE RBRACKET SWITCH. { A = MOJOSHADER_AST_SWITCHATTR_FORCECASE; }

switch_intro(A) ::= LBRACKET CALL RBRACKET SWITCH. { A = MOJOSHADER_AST_SWITCHATTR_CALL; }

switch_intro(A) ::= SWITCH. { A = MOJOSHADER_AST_SWITCHATTR_NONE; }

%type switch_case_list { MOJOSHADER_astSwitchCases * }

%destructor switch_case_list { delete_switch_case(ctx, $$); }

switch_case_list(A) ::= switch_case(B). { A = B; }

switch_case_list(A) ::= switch_case_list(B) switch_case(C). { A = C; A->next = B; }

// You can do math here, apparently, as long as it produces an int constant.

//  ...so "case 3+2:" works.

%type switch_case { MOJOSHADER_astSwitchCases * }

%destructor switch_case { delete_switch_case(ctx, $$); }

switch_case(A) ::= CASE expression(B) COLON statement_list(C). { REVERSE_LINKED_LIST(MOJOSHADER_astStatement, C); A = new_switch_case(ctx, B, C); }

switch_case(A) ::= CASE expression(B) COLON. { A = new_switch_case(ctx, B, NULL); }

switch_case(A) ::= DEFAULT COLON statement_list(B). { REVERSE_LINKED_LIST(MOJOSHADER_astStatement, B); A = new_switch_case(ctx, NULL, B); }

switch_case(A) ::= DEFAULT COLON. { A = new_switch_case(ctx, NULL, NULL); }

// the expression stuff is based on Jeff Lee's ANSI C grammar.

%type primary_expr { MOJOSHADER_astExpression * }

%destructor primary_expr { delete_expr(ctx, $$); }

primary_expr(A) ::= IDENTIFIER(B). { A = new_identifier_expr(ctx, B.string); }

primary_expr(A) ::= INT_CONSTANT(B). { A = new_literal_int_expr(ctx, B.i64); }

primary_expr(A) ::= FLOAT_CONSTANT(B). { A = new_literal_float_expr(ctx, B.dbl); }

primary_expr(A) ::= STRING_LITERAL(B). { A = new_literal_string_expr(ctx, B.string); }

primary_expr(A) ::= TRUE. { A = new_literal_boolean_expr(ctx, 1); }

primary_expr(A) ::= FALSE. { A = new_literal_boolean_expr(ctx, 0); }

primary_expr(A) ::= LPAREN expression(B) RPAREN. { A = B; }

%type postfix_expr { MOJOSHADER_astExpression * }

%destructor postfix_expr { delete_expr(ctx, $$); }

postfix_expr(A) ::= primary_expr(B). { A = B; }

postfix_expr(A) ::= postfix_expr(B) LBRACKET expression(C) RBRACKET. { A = new_binary_expr(ctx, MOJOSHADER_AST_OP_DEREF_ARRAY, B, C); }

postfix_expr(A) ::= IDENTIFIER(B) arguments(C). { A = new_callfunc_expr(ctx, B.string, C); }

postfix_expr(A) ::= datatype(B) arguments(C). { A = new_constructor_expr(ctx, B, C); } // HLSL constructor

postfix_expr(A) ::= postfix_expr(B) DOT IDENTIFIER(C). { A = new_deref_struct_expr(ctx, B, C.string); }

postfix_expr(A) ::= postfix_expr(B) PLUSPLUS. { A = new_unary_expr(ctx, MOJOSHADER_AST_OP_POSTINCREMENT, B); }