/**

* 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.

%start_symbol shader

%token_prefix TOKEN_HLSL_

%extra_argument { Context *ctx }

%include {

#ifndef __MOJOSHADER_HLSL_COMPILER__

#error Do not compile this file directly.

#endif

}

}

%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...

%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; } }

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

%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); }

%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; }

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.

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

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

%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.

%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 * }

// 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 * }

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; }

%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; }

%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.

// 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 * }

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

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

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

%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; }

%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.

%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); }

%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; }

%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?

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

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

%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; }

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

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

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

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

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

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; }

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); }

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

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

// !!! 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

%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) ::= 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

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; }

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; }

%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); }

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; }

%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; }

%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.

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

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; }

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

postfix_expr(A) ::= postfix_expr(B) MINUSMINUS. { A = new_unary_expr(ctx, MOJOSHADER_AST_OP_POSTDECREMENT, B); }

%destructor arguments { delete_arguments(ctx, $$); }

arguments(A) ::= LPAREN RPAREN. { A = NULL; }

%destructor argument_list { delete_arguments(ctx, $$); }

argument_list(A) ::= assignment_expr(B). { A = new_argument(ctx, B); }

argument_list(A) ::= argument_list(B) COMMA assignment_expr(C). { A = new_argument(ctx, C); A->next = B; }

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

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

unary_expr(A) ::= PLUSPLUS unary_expr(B). { A = new_unary_expr(ctx, MOJOSHADER_AST_OP_PREINCREMENT, B); }

unary_expr(A) ::= MINUSMINUS unary_expr(B). { A = new_unary_expr(ctx, MOJOSHADER_AST_OP_PREDECREMENT, B); }

unary_expr(A) ::= MINUS cast_expr(B). { A = new_unary_expr(ctx, MOJOSHADER_AST_OP_NEGATE, B); }

unary_expr(A) ::= COMPLEMENT cast_expr(B). { A = new_unary_expr(ctx, MOJOSHADER_AST_OP_COMPLEMENT, B); }

unary_expr(A) ::= EXCLAMATION cast_expr(B). { A = new_unary_expr(ctx, MOJOSHADER_AST_OP_NOT, B); }

multiplicative_expr(A) ::= multiplicative_expr(B) STAR cast_expr(C). { A = new_binary_expr(ctx, MOJOSHADER_AST_OP_MULTIPLY, B, C); }

multiplicative_expr(A) ::= multiplicative_expr(B) SLASH cast_expr(C). { A = new_binary_expr(ctx, MOJOSHADER_AST_OP_DIVIDE, B, C); }

multiplicative_expr(A) ::= multiplicative_expr(B) PERCENT cast_expr(C). { A = new_binary_expr(ctx, MOJOSHADER_AST_OP_MODULO, B, C); }

additive_expr(A) ::= additive_expr(B) PLUS multiplicative_expr(C). { A = new_binary_expr(ctx, MOJOSHADER_AST_OP_ADD, B, C); }

additive_expr(A) ::= additive_expr(B) MINUS multiplicative_expr(C). { A = new_binary_expr(ctx, MOJOSHADER_AST_OP_SUBTRACT, B, C); }

shift_expr(A) ::= shift_expr(B) LSHIFT additive_expr(C). { A = new_binary_expr(ctx, MOJOSHADER_AST_OP_LSHIFT, B, C); }

shift_expr(A) ::= shift_expr(B) RSHIFT additive_expr(C). { A = new_binary_expr(ctx, MOJOSHADER_AST_OP_RSHIFT, B, C); }

relational_expr(A) ::= relational_expr(B) LT shift_expr(C). { A = new_binary_expr(ctx, MOJOSHADER_AST_OP_LESSTHAN, B, C); }

relational_expr(A) ::= relational_expr(B) GT shift_expr(C). { A = new_binary_expr(ctx, MOJOSHADER_AST_OP_GREATERTHAN, B, C); }

relational_expr(A) ::= relational_expr(B) LEQ shift_expr(C). { A = new_binary_expr(ctx, MOJOSHADER_AST_OP_LESSTHANOREQUAL, B, C); }

relational_expr(A) ::= relational_expr(B) GEQ shift_expr(C). { A = new_binary_expr(ctx, MOJOSHADER_AST_OP_GREATERTHANOREQUAL, B, C); }

equality_expr(A) ::= equality_expr(B) EQL relational_expr(C). { A = new_binary_expr(ctx, MOJOSHADER_AST_OP_EQUAL, B, C); }

equality_expr(A) ::= equality_expr(B) NEQ relational_expr(C). { A = new_binary_expr(ctx, MOJOSHADER_AST_OP_NOTEQUAL, B, C); }