expression.f90 File Reference

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Data Types
type	expression::token_t
	A single token of an expression. More...
type	expression::parser_t
	State of the recursive descent parser. More...
type	expression::expression_t
	A compiled mathematical expression. More...

Modules
module	expression
	Evaluation of mathematical expressions given as strings in the case file.

Functions/Subroutines
subroutine	expression::expression_init (this, str)
	Compile an expression.
subroutine	expression::parser_free (p)
	Release the memory held by the parser state.
subroutine	expression::expression_free (this)
	Destructor.
subroutine	expression::expression_eval (this, res, n, x, y, z, t, dt)
	Evaluate the expression in n points.
subroutine, public	expression::expression_eval_static (str, res, n, x, y, z, usage)
	Compile an expression and evaluate it in a set of points, in a context where there is no time state.
subroutine, public	expression::expression_check_finite (str, res, n, usage)
	Abort if an expression did not evaluate to a finite value everywhere.
subroutine	expression::expr_tokenize (p)
	Split the source string into a stream of tokens.
subroutine	expression::push_token (p, kind, pos)
	Append a token to the token stream.
recursive subroutine	expression::parse_expr (p)
	Parse an additive expression.
recursive subroutine	expression::parse_term (p)
	Parse a multiplicative expression.
recursive subroutine	expression::parse_factor (p)
	Parse a possibly signed factor. Unary minus binds looser than ^, so -x^2 is -(x^2), as in Fortran.
recursive subroutine	expression::parse_power (p)
	Parse an exponentiation. Right associative, so 2^3^2 is 2^(3^2).
recursive subroutine	expression::parse_primary (p)
	Parse a literal, a symbol, a function call or a parenthesised expression.
subroutine	expression::parse_symbol (p, k)
	Resolve a bare identifier into either a variable opcode or a literal.
integer function	expression::func_op (name, nargs)
	Look up the opcode of a function.
subroutine	expression::emit (p, op, val)
	Append an opcode, keeping track of how deep the evaluation stack gets.
subroutine	expression::expr_error (p, msg, pos)
	Abort with a message pointing at the offending part of the expression.
pure logical function	expression::is_digit (c)
	True if c is a decimal digit.
pure logical function	expression::is_alpha (c)
	True if c is a letter.

Variables
integer, parameter, public	expression::neko_expr_len = 256
	Maximum length of an expression string read from the case file.
integer, parameter	expression::expr_max_ident = 64
	Maximum length of an identifier appearing in an expression.
integer, parameter	expression::expr_chunk = 1024
	Number of points evaluated per pass over the opcode stream. Chosen so that the evaluation stack stays in cache irrespective of how many points the caller hands over in one go.
integer, parameter	expression::op_lit = 1
integer, parameter	expression::op_x = 2
integer, parameter	expression::op_y = 3
integer, parameter	expression::op_z = 4
integer, parameter	expression::op_t = 5
integer, parameter	expression::op_dt = 6
integer, parameter	expression::op_unary = 20
integer, parameter	expression::op_neg = 20
integer, parameter	expression::op_sin = 21
integer, parameter	expression::op_cos = 22
integer, parameter	expression::op_tan = 23
integer, parameter	expression::op_asin = 24
integer, parameter	expression::op_acos = 25
integer, parameter	expression::op_atan = 26
integer, parameter	expression::op_sinh = 27
integer, parameter	expression::op_cosh = 28
integer, parameter	expression::op_tanh = 29
integer, parameter	expression::op_exp = 30
integer, parameter	expression::op_log = 31
integer, parameter	expression::op_log10 = 32
integer, parameter	expression::op_sqrt = 33
integer, parameter	expression::op_abs = 34
integer, parameter	expression::op_erf = 35
integer, parameter	expression::op_erfc = 36
integer, parameter	expression::op_step = 37
integer, parameter	expression::op_ipow = 38
integer, parameter	expression::op_binary = 60
integer, parameter	expression::op_add = 60
integer, parameter	expression::op_sub = 61
integer, parameter	expression::op_mul = 62
integer, parameter	expression::op_div = 63
integer, parameter	expression::op_pow = 64
integer, parameter	expression::op_atan2 = 65
integer, parameter	expression::op_min = 66
integer, parameter	expression::op_max = 67
integer, parameter	expression::op_mod = 68
integer, parameter	expression::tk_end = 0
integer, parameter	expression::tk_num = 1
integer, parameter	expression::tk_ident = 2
integer, parameter	expression::tk_plus = 3
integer, parameter	expression::tk_minus = 4
integer, parameter	expression::tk_star = 5
integer, parameter	expression::tk_slash = 6
integer, parameter	expression::tk_pow = 7
integer, parameter	expression::tk_lpar = 8
integer, parameter	expression::tk_rpar = 9
integer, parameter	expression::tk_comma = 10